bump version to 0.13.0-rc10

Merge pull request #558 from clark800/wss
Add pattern for servers option
2025-11-15 10:05:48 +00:00 · 2015-09-22 18:33:48 -07:00 · 2015-09-22 18:25:17 -07:00 · 2015-09-21 17:34:39 -07:00 · 2015-09-21 15:33:44 -07:00 · 2015-09-21 14:38:51 -07:00
229 changed files with 9130 additions and 3736 deletions
--- a/Gulpfile.js
+++ b/Gulpfile.js
@@ -26,6 +26,9 @@ function webpackConfig(extension, overrides) {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader?optional=runtime'
+      }, {
+        test: /\.json/,
+        loader: 'json-loader'
      }]
    }
  };
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,18 @@
+##0.13.0 (release candidate)
+
+ [Fix: Emit error events and return error on pathfind](https://github.com/ripple/ripple-lib/commit/1ccbaf677631a1944eb05d90f7afc5f3690a03dd)
+ [Deprecate core and remove snake case method copying](https://github.com/ripple/ripple-lib/commit/fb8dc44ec1d49bb05cd0cdbe6dd4ab211195868a)
+ Add new RippleAPI interface
+    - [RippleAPI README and samples](https://github.com/ripple/ripple-lib/tree/develop/docs/samples)
+    - [Method documentation](https://rawgit.com/ripple/ripple-lib/develop/docs/api.html)
+ [Fix RangeSet for validated_ledger as single ledger](https://github.com/ripple/ripple-lib/commit/9f9e76f8b933201651af59307135f67cfa7d60e8)
+ [Fix bug where the paths would be set with an empty array](https://github.com/ripple/ripple-lib/commit/83874ec0962da311b76f2385623e51c68bc39035)
+ [Fix reserve calculation](https://github.com/ripple/ripple-lib/commit/52879febb92d876f01f2e4d70871baa07af631fb)
+
+##0.12.6
+
+ [Fix webpack require failure due to "./" notation](https://github.com/ripple/ripple-lib/commit/8d9746d7b10be203ee613df523c2522012ff1baf)
+
 ##0.12.15

 + [Add offer autobridging](https://github.com/ripple/ripple-lib/commit/c7bbce83719c1e8c6a4fae5ca850e7515db1a4a5)
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@

 A JavaScript API for interacting with Ripple in Node.js and the browser

-[![Build Status](https://travis-ci.org/ripple/ripple-lib.svg?branch=develop)](https://travis-ci.org/ripple/ripple-lib) [![Coverage Status](https://coveralls.io/repos/ripple/ripple-lib/badge.png?branch=develop)](https://coveralls.io/r/ripple/ripple-lib?branch=develop)
+[![Circle CI](https://circleci.com/gh/ripple/ripple-lib/tree/develop.svg?style=svg)](https://circleci.com/gh/ripple/ripple-lib/tree/develop) [![Coverage Status](https://coveralls.io/repos/ripple/ripple-lib/badge.png?branch=develop)](https://coveralls.io/r/ripple/ripple-lib?branch=develop)

 [![NPM](https://nodei.co/npm/ripple-lib.png)](https://www.npmjs.org/package/ripple-lib)

--- a/bin/ci.sh
+++ b/bin/ci.sh
@@ -5,19 +5,32 @@ TOTAL_NODES="$2"

 typecheck() {
  npm install -g flow-bin
+  flow --version
  npm run typecheck
 }

 lint() {
+  echo "eslint $(node_modules/.bin/eslint --version)"
+  npm list babel-eslint | grep babel-eslint
  REPO_URL="https://raw.githubusercontent.com/ripple/javascript-style-guide"
  curl "$REPO_URL/es6/eslintrc" > ./eslintrc
-  echo "plugins: [flowtype]" >> ./eslintrc
-  node_modules/.bin/eslint --reset -c ./eslintrc $(git --no-pager diff --name-only -M100% --diff-filter=AM --relative $(git merge-base FETCH_HEAD origin/HEAD) FETCH_HEAD | grep "\.js$")
+  echo "parser: babel-eslint" >> ./eslintrc
+  node_modules/.bin/eslint -c ./eslintrc $(git --no-pager diff --name-only -M100% --diff-filter=AM --relative $(git merge-base FETCH_HEAD origin/HEAD) FETCH_HEAD | grep "\.js$")
 }

 unittest() {
+  # test "src"
  npm test --coverage
  npm run coveralls
+
+  # test compiled version in "dist/npm"
+  babel -D --optional runtime --ignore "**/node_modules/**" -d test-compiled/ test/
+  echo "--reporter spec --timeout 5000 --slow 500" > test-compiled/mocha.opts
+  mkdir -p test-compiled/node_modules
+  ln -nfs ../../dist/npm/core test-compiled/node_modules/ripple-lib
+  ln -nfs ../../dist/npm test-compiled/node_modules/ripple-api
+  mocha --opts test-compiled/mocha.opts test-compiled
+  rm -rf test-compiled
 }

 oneNode() {
--- a/docs/api.html
+++ b/docs/api.html
@@ -0,0 +1,358 @@
+<html>
+<head>
+<style>
+a {
+  text-decoration: none;
+}
+.method {
+  margin-bottom: 10px;
+}
+.details {
+  font-family: "Courier New", monospace;
+  white-space: pre;
+  display: none;
+}
+</style>
+<script type="text/javascript">
+function toggle(element) {
+  var results = element.parentElement.getElementsByClassName('details');
+  if (results.length > 0) {
+    var style = results[0].style;
+    style.display = (style.display === 'block') ? 'none' : 'block';
+  }
+}
+</script>
+</head>
+<body>
+
+<h2><a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/index.js">RippleAPI</a></h2>
+
+<div class="method">
+connect()
+</div>
+
+<div class="method">
+disconnect()
+</div>
+
+<div class="method">
+isConnected()
+</div>
+
+<div class="method">
+getServerInfo()
+</div>
+
+<div class="method">
+getFee()
+</div>
+
+<div class="method">
+getLedgerVersion()
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-transaction.json">getTransaction</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/hash256.json">identifier</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/transaction-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  identifier: txhash
+  options: {minLedgerVersion: int, maxLedgerVersion: int}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-transactions.json">getTransactions</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/transactions-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  options: {
+    start: txhash,
+    limit: int,
+    minLedgerVersion: int,
+    maxLedgerVersion: int,
+    earliestFirst: bool,
+    excludeFailures: bool,
+    initiated: bool,
+    counterparty: address,
+    types: [string],
+    binary: bool
+  }
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-trustlines.json">getTrustlines</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/trustlines-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  options: {counterparty: address, currency: string, limit: int, ledgerVersion: int}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-balances.json">getBalances</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/trustlines-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  options: {counterparty: address, currency: string, limit: int, ledgerVersion: int}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-paths.json">getPaths</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/pathfind.json">pathfind</a>
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  pathfind: {
+    source: {
+      address: address,
+      currencies: [{
+        currency: string,
+        counterparty: address
+      }]
+    },
+    destination: adjustment
+  }
+
+  adjustment = {address: address, amount: amount, tag?: int}
+  amount = {currency: string, counterparty: address, value: floatstr}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-orders.json">getOrders</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/orders-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  options: {limit: int, ledverVersion: int}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-orderbook.json">getOrderbook</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/orderbook.json">orderbook</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/orders-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  orderbook: {
+    base: {
+      currency,
+      counterparty
+    },
+    counter: {
+      currency,
+      counterparty
+    }
+  }
+  options: {limit: int, ledverVersion: int}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-settings.json">getSettings</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/settings-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  options: {ledgerVersion: int}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/get-account-info.json">getAccountInfo</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/settings-options.json">options</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  options: {ledgerVersion: int}
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/tx.json">preparePayment</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/payment.json">payment</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/instructions.json">instructions</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  payment: {
+    source: adjustment,
+    destination: adjustment,
+    paths?: string,
+    slippage?: strfloat,
+    memos?: [{
+      type: string,
+      format: string,
+      data: string
+    }],
+    invoiceID?: hash256,
+    allowPartialPayment?: bool,
+    noDirectRipple?: bool,
+    limitQuality?: bool
+  }
+
+  adjustment = {address: address, amount: amount, tag?: int}
+  amount = {currency: string, counterparty: address, value: floatstr}
+
+  instructions: {
+    sequence: int,
+    fee: floatstr,
+    maxFee: floatstr,
+    maxLedgerVersion: int,
+    maxLedgerVersionOffset: int
+  }
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/tx.json">prepareTrustline</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/trustline.json">trustline</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/instructions.json">instructions</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  trustline: {
+    currency: string,
+    counterparty: address,
+    limit: strfloat,
+    qualityIn?: float,
+    qualityOut?: float,
+    allowRippling?: bool,
+    authorized?: bool,
+    frozen?: bool
+  }
+
+  instructions: {
+    sequence: int,
+    fee: floatstr,
+    maxFee: floatstr,
+    maxLedgerVersion: int,
+    maxLedgerVersionOffset: int
+  }
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/tx.json">prepareOrder</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/order.json">order</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/instructions.json">instructions</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  order: {
+    direction: ("buy"|"sell"),
+    quantity: amount,
+    totalPrice: amount,
+    immediateOrCancel?: bool,
+    fillOrKill?: bool,
+    passive?: bool
+  }
+
+  amount = {currency: string, counterparty: address, value: floatstr}
+
+  instructions: {
+    sequence: int,
+    fee: floatstr,
+    maxFee: floatstr,
+    maxLedgerVersion: int,
+    maxLedgerVersionOffset: int
+  }
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/tx.json">prepareOrderCancellation</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/sequence.json">sequence</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/instructions.json">instructions</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  sequence: int
+
+  instructions: {
+    sequence: int,
+    fee: floatstr,
+    maxFee: floatstr,
+    maxLedgerVersion: int,
+    maxLedgerVersionOffset: int
+  }
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/tx.json">prepareSettings</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/address.json">account</a>,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/settings.json">settings</a>[,
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/instructions.json">instructions</a>]
+)
+<a href="#" onclick="javascript:toggle(this)">+</a>
+<div class="details">
+  settings: {
+    passwordSpent: bool,
+    requireDestinationTag: bool,
+    requireAuthorization: bool,
+    disallowIncomingXRP: bool,
+    disableMasterKey: bool,
+    enableTransactionIDTracking: bool,
+    noFreeze: bool,
+    globalFreeze: bool,
+    defaultRipple: bool,
+    emailHash: hash128,
+    walletLocator: hash256,
+    walletSize: int,
+    messageKey: string,
+    domain: string,
+    transferRate: float,
+    signers: string,
+    regularKey: address
+  }
+
+  instructions: {
+    sequence: int,
+    fee: floatstr,
+    maxFee: floatstr,
+    maxLedgerVersion: int,
+    maxLedgerVersionOffset: int
+  }
+</div>
+</div>
+
+<div class="method">
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/sign.json">sign</a>(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/tx.json">txJSON</a>,
+secret)
+</div>
+
+<div class="method">
+submit(
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/schemas/blob.json">txBlob</a>
+)
+</div>
+
+<div class="method">
+generateWallet()
+</div>
+
+<a href="https://github.com/ripple/ripple-lib/blob/develop/src/api/common/errors.js">errors</a>
+</body>
+</html>
--- a/docs/samples/README
+++ b/docs/samples/README
@@ -0,0 +1,3 @@
+Usage:
+babel-node balances.js
+babel-node payment.js (requires setting address and secret in source file first)
--- a/docs/samples/balances.js
+++ b/docs/samples/balances.js
@@ -0,0 +1,12 @@
+'use strict';
+const RippleAPI = require('../../src').RippleAPI; // require('ripple-lib')
+
+const api = new RippleAPI({servers: ['wss://s1.ripple.com:443']});
+const address = 'r3kmLJN5D28dHuH8vZNUZpMC43pEHpaocV';
+
+api.connect().then(() => {
+  api.getBalances(address).then(balances => {
+    console.log(JSON.stringify(balances, null, 2));
+    process.exit();
+  });
+});
--- a/docs/samples/payment.js
+++ b/docs/samples/payment.js
@@ -0,0 +1,41 @@
+'use strict';
+const RippleAPI = require('../../src').RippleAPI; // require('ripple-lib')
+
+const address = 'INSERT ADDRESS HERE';
+const secret = 'INSERT SECRET HERE';
+
+const api = new RippleAPI({servers: ['wss://s1.ripple.com:443']});
+const instructions = {maxLedgerVersionOffset: 5};
+
+const payment = {
+  source: {
+    address: address,
+    amount: {
+      value: '0.01',
+      currency: 'XRP'
+    }
+  },
+  destination: {
+    address: 'rKmBGxocj9Abgy25J51Mk1iqFzW9aVF9Tc',
+    amount: {
+      value: '0.01',
+      currency: 'XRP'
+    }
+  }
+};
+
+api.connect().then(() => {
+  console.log('Connected...');
+  api.preparePayment(address, payment, instructions).then(txJSON => {
+    console.log('Payment transaction prepared...');
+    const signedTransaction = api.sign(txJSON, secret).signedTransaction;
+    console.log('Payment transaction signed...');
+    api.submit(signedTransaction).then(response => {
+      console.log(response);
+      process.exit(0);
+    }).catch(error => {
+      console.log(error);
+      process.exit(1);
+    });
+  });
+});
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -1,20 +1,20 @@
 {
  "name": "ripple-lib",
-  "version": "0.13.0-rc1",
+  "version": "0.13.0-rc10",
  "npm-shrinkwrap-version": "5.4.0",
-  "node-version": "v0.12.6",
+  "node-version": "v0.12.7",
  "dependencies": {
    "async": {
      "version": "0.9.2",
      "resolved": "https://registry.npmjs.org/async/-/async-0.9.2.tgz"
    },
    "babel-runtime": {
-      "version": "5.8.3",
-      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-5.8.3.tgz",
+      "version": "5.8.24",
+      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-5.8.24.tgz",
      "dependencies": {
        "core-js": {
-          "version": "0.9.18",
-          "resolved": "https://registry.npmjs.org/core-js/-/core-js-0.9.18.tgz"
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-1.1.4.tgz"
        }
      }
    },
@@ -22,21 +22,45 @@
      "version": "2.0.7",
      "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-2.0.7.tgz"
    },
+    "bn.js": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-3.1.2.tgz"
+    },
+    "es6-promisify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/es6-promisify/-/es6-promisify-2.0.0.tgz",
+      "dependencies": {
+        "es6-promise": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-2.3.0.tgz"
+        }
+      }
+    },
    "extend": {
      "version": "1.2.1",
      "resolved": "https://registry.npmjs.org/extend/-/extend-1.2.1.tgz"
    },
+    "hash.js": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/hash.js/-/hash.js-1.0.3.tgz",
+      "dependencies": {
+        "inherits": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
+        }
+      }
+    },
    "https-proxy-agent": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-1.0.0.tgz",
      "dependencies": {
        "agent-base": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-2.0.0.tgz",
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-2.0.1.tgz",
          "dependencies": {
            "semver": {
-              "version": "4.3.6",
-              "resolved": "https://registry.npmjs.org/semver/-/semver-4.3.6.tgz"
+              "version": "5.0.3",
+              "resolved": "https://registry.npmjs.org/semver/-/semver-5.0.3.tgz"
            }
          }
        },
@@ -57,8 +81,8 @@
      }
    },
    "is-my-json-valid": {
-      "version": "2.12.0",
-      "resolved": "https://registry.npmjs.org/is-my-json-valid/-/is-my-json-valid-2.12.0.tgz",
+      "version": "2.12.2",
+      "resolved": "https://registry.npmjs.org/is-my-json-valid/-/is-my-json-valid-2.12.2.tgz",
      "dependencies": {
        "generate-function": {
          "version": "2.0.0",
@@ -75,8 +99,8 @@
          }
        },
        "jsonpointer": {
-          "version": "1.1.0",
-          "resolved": "https://registry.npmjs.org/jsonpointer/-/jsonpointer-1.1.0.tgz"
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/jsonpointer/-/jsonpointer-2.0.0.tgz"
        },
        "xtend": {
          "version": "4.0.0",
@@ -85,16 +109,52 @@
      }
    },
    "lodash": {
-      "version": "3.10.0",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.0.tgz"
+      "version": "3.10.1",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz"
    },
    "lru-cache": {
      "version": "2.5.2",
      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.5.2.tgz"
    },
+    "ripple-address-codec": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/ripple-address-codec/-/ripple-address-codec-1.6.0.tgz",
+      "dependencies": {
+        "x-address-codec": {
+          "version": "0.6.0",
+          "resolved": "https://registry.npmjs.org/x-address-codec/-/x-address-codec-0.6.0.tgz",
+          "dependencies": {
+            "base-x": {
+              "version": "1.0.1",
+              "resolved": "https://registry.npmjs.org/base-x/-/base-x-1.0.1.tgz"
+            }
+          }
+        }
+      }
+    },
+    "ripple-keypairs": {
+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/ripple-keypairs/-/ripple-keypairs-0.8.0.tgz",
+      "dependencies": {
+        "brorand": {
+          "version": "1.0.5",
+          "resolved": "https://registry.npmjs.org/brorand/-/brorand-1.0.5.tgz"
+        },
+        "elliptic": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-5.1.0.tgz",
+          "dependencies": {
+            "inherits": {
+              "version": "2.0.1",
+              "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
+            }
+          }
+        }
+      }
+    },
    "ripple-lib-transactionparser": {
-      "version": "0.3.2",
-      "resolved": "https://registry.npmjs.org/ripple-lib-transactionparser/-/ripple-lib-transactionparser-0.3.2.tgz",
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/ripple-lib-transactionparser/-/ripple-lib-transactionparser-0.5.0.tgz",
      "dependencies": {
        "bignumber.js": {
          "version": "1.4.1",
@@ -102,23 +162,9 @@
        }
      }
    },
-    "ripple-wallet-generator": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/ripple-wallet-generator/-/ripple-wallet-generator-1.0.3.tgz"
-    },
-    "simple-asyncify": {
+    "sjcl-codec": {
      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/simple-asyncify/-/simple-asyncify-0.1.0.tgz"
-    },
-    "sjcl-extended": {
-      "version": "1.0.3",
-      "resolved": "git://github.com/ripple/sjcl-extended.git#d8cf8b22e7d97193c54e1f65113e3edcf200ca17",
-      "dependencies": {
-        "sjcl": {
-          "version": "1.0.3",
-          "resolved": "https://registry.npmjs.org/sjcl/-/sjcl-1.0.3.tgz"
-        }
-      }
+      "resolved": "https://registry.npmjs.org/sjcl-codec/-/sjcl-codec-0.1.0.tgz"
    },
    "ws": {
      "version": "0.7.2",
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "ripple-lib",
-  "version": "0.13.0-rc1",
+  "version": "0.13.0-rc10",
  "license": "ISC",
  "description": "A JavaScript API for interacting with Ripple in Node.js and the browser",
  "files": [
@@ -18,33 +18,37 @@
    "async": "~0.9.0",
    "babel-runtime": "^5.5.4",
    "bignumber.js": "^2.0.3",
+    "bn.js": "^3.1.1",
+    "es6-promisify": "^2.0.0",
    "extend": "~1.2.1",
+    "hash.js": "^1.0.3",
    "https-proxy-agent": "^1.0.0",
-    "is-my-json-valid": "^2.12.0",
+    "is-my-json-valid": "^2.12.2",
    "lodash": "^3.1.0",
    "lru-cache": "~2.5.0",
-    "ripple-lib-transactionparser": "^0.3.2",
-    "ripple-wallet-generator": "^1.0.3",
-    "simple-asyncify": "^0.1.0",
-    "sjcl-extended": "ripple/sjcl-extended#1.0.3",
+    "ripple-address-codec": "^1.6.0",
+    "ripple-keypairs": "^0.8.0",
+    "ripple-lib-transactionparser": "^0.5.0",
+    "sjcl-codec": "0.1.0",
    "ws": "~0.7.1"
  },
  "devDependencies": {
    "assert-diff": "^1.0.1",
-    "babel": "^5.5.4",
-    "babel-core": "^5.5.4",
-    "babel-eslint": "^3.1.23",
-    "babel-loader": "^5.0.0",
+    "babel": "^5.8.21",
+    "babel-core": "^5.8.22",
+    "babel-eslint": "^4.0.5",
+    "babel-loader": "^5.3.2",
    "coveralls": "~2.10.0",
-    "eslint": "^0.24.0",
+    "eslint": "^1.3.0",
    "eslint-plugin-flowtype": "^1.0.0",
    "eventemitter2": "^0.4.14",
-    "flow-bin": "^0.13.1",
+    "flow-bin": "^0.14",
    "gulp": "~3.8.10",
    "gulp-bump": "~0.1.13",
    "gulp-rename": "~1.2.0",
    "gulp-uglify": "~1.1.0",
    "istanbul": "~0.3.5",
+    "json-loader": "^0.5.2",
    "mocha": "~2.1.0",
    "webpack": "~1.5.3",
    "yargs": "~1.3.1"
@@ -53,12 +57,13 @@
    "build": "gulp",
    "clean": "rm -rf dist/npm && rm -rf build/flow",
    "typecheck": "babel --optional runtime --blacklist flow -d build/flow/ src/ && flow check",
-    "compile": "babel --optional runtime -d dist/npm/ src/ && cp -r src/api/common/schemas/ dist/npm/api/common/schemas/",
-    "compile-with-source-maps": "babel --optional runtime -s -t -d dist/npm/ src/",
+    "compile": "babel -D --optional runtime -d dist/npm/ src/",
+    "watch": "babel -w -D --optional runtime -d dist/npm/ src/",
+    "compile-with-source-maps": "babel -D --optional runtime -s -t -d dist/npm/ src/",
    "prepublish": "npm run clean && npm run compile",
    "test": "istanbul test _mocha",
    "coveralls": "cat ./coverage/lcov.info | coveralls",
-    "lint": "if ! [ -f eslintrc ]; then curl -o eslintrc 'https://raw.githubusercontent.com/ripple/javascript-style-guide/es6/eslintrc'; echo 'plugins:\n  - flowtype' >> eslintrc; fi; eslint --reset -c eslintrc src/",
+    "lint": "if ! [ -f eslintrc ]; then curl -o eslintrc 'https://raw.githubusercontent.com/ripple/javascript-style-guide/es6/eslintrc'; echo 'parser: babel-eslint' >> eslintrc; fi; eslint -c eslintrc src/",
    "perf": "./scripts/perf_test.sh"
  },
  "repository": {
--- a/scripts/verify_ledger_json.js
+++ b/scripts/verify_ledger_json.js
@@ -2,12 +2,13 @@
 'use strict';

 var fs = require('fs');
-var Amount = require('../dist/npm').Amount;
-var Ledger = require('../dist/npm').Ledger;
+var ripple = require('../dist/npm')._DEPRECATED;
+var Amount = ripple.Amount;
+var Ledger = ripple.Ledger;

 function parse_options(from, flags) {
-  var argv = from.slice(),
-      opts_ = {argv: argv};
+  var argv = from.slice();
+  var opts_ = {argv: argv};

  flags.forEach(function(f) {
    // Do we have the flag?
--- a/src/api/common/constants.js
+++ b/src/api/common/constants.js
@@ -33,7 +33,7 @@ const AccountFields = {
  WalletSize: {name: 'walletSize', defaults: 0},
  MessageKey: {name: 'messageKey'},
  Domain: {name: 'domain', encoding: 'hex'},
-  TransferRate: {name: 'transferRate', defaults: 0},
+  TransferRate: {name: 'transferRate', defaults: 0, shift: 9},
  Signers: {name: 'signers'}
 };

--- a/src/api/common/errors.js
+++ b/src/api/common/errors.js
@@ -58,6 +58,13 @@ function MissingLedgerHistoryError(message) {
 MissingLedgerHistoryError.prototype = new RippleError();
 MissingLedgerHistoryError.prototype.name = 'MissingLedgerHistoryError';

+function PendingLedgerVersionError(message) {
+  this.message = message ||
+    'maxLedgerVersion is greater than server\'s most recent validated ledger';
+}
+PendingLedgerVersionError.prototype = new RippleError();
+PendingLedgerVersionError.prototype.name = 'PendingLedgerVersionError';
+
 /**
 * Request timed out
 */
@@ -77,13 +84,14 @@ ApiError.prototype = new RippleError();
 ApiError.prototype.name = 'ApiError';

 module.exports = {
-  ValidationError: ValidationError,
-  NetworkError: NetworkError,
-  TransactionError: TransactionError,
-  RippledNetworkError: RippledNetworkError,
-  NotFoundError: NotFoundError,
-  MissingLedgerHistoryError: MissingLedgerHistoryError,
-  TimeOutError: TimeOutError,
-  ApiError: ApiError,
-  RippleError: RippleError
+  ValidationError,
+  NetworkError,
+  TransactionError,
+  RippledNetworkError,
+  NotFoundError,
+  PendingLedgerVersionError,
+  MissingLedgerHistoryError,
+  TimeOutError,
+  ApiError,
+  RippleError
 };
--- a/src/api/common/index.js
+++ b/src/api/common/index.js
@@ -9,7 +9,12 @@ module.exports = {
  dropsToXrp: utils.dropsToXrp,
  xrpToDrops: utils.xrpToDrops,
  toRippledAmount: utils.toRippledAmount,
-  wrapCatch: utils.wrapCatch,
+  generateAddress: utils.generateAddress,
  composeAsync: utils.composeAsync,
-  convertExceptions: utils.convertExceptions
+  wrapCatch: utils.wrapCatch,
+  convertErrors: utils.convertErrors,
+  convertExceptions: utils.convertExceptions,
+  convertKeysFromSnakeCaseToCamelCase:
+    utils.convertKeysFromSnakeCaseToCamelCase,
+  promisify: utils.promisify
 };
--- a/src/api/common/schema-validator.js
+++ b/src/api/common/schema-validator.js
@@ -1,36 +1,92 @@
+// flow is disabled for this file until support for requiring json is added:
+// https://github.com/facebook/flow/issues/167
 'use strict';
 const _ = require('lodash');
-const fs = require('fs');
-const path = require('path');
+const assert = require('assert');
 const validator = require('is-my-json-valid');
 const core = require('./utils').core;
 const ValidationError = require('./errors').ValidationError;

 let SCHEMAS = {};

-function isValidAddress(address) {
-  return core.UInt160.is_valid(address);
+function isValidAddress(address: string): boolean {
+  return typeof address === 'string' && address.length > 0 &&
+    address[0] === 'r' &&
+    core.UInt160.is_valid(address);
 }

 function isValidLedgerHash(ledgerHash) {
  return core.UInt256.is_valid(ledgerHash);
 }

-function loadSchema(filepath) {
-  try {
-    return JSON.parse(fs.readFileSync(filepath, 'utf8'));
-  } catch (e) {
-    throw new Error('Failed to parse schema: ' + filepath);
-  }
-}
-
-function endsWith(str, suffix) {
-  return str.indexOf(suffix, str.length - suffix.length) !== -1;
-}
-
-function loadSchemas(dir) {
-  const filenames = fs.readdirSync(dir).filter(name => endsWith(name, '.json'));
-  const schemas = filenames.map(name => loadSchema(path.join(dir, name)));
+function loadSchemas() {
+  // listed explicitly for webpack (instead of scanning schemas directory)
+  const schemas = [
+    require('./schemas/address.json'),
+    require('./schemas/adjustment.json'),
+    require('./schemas/amount.json'),
+    require('./schemas/amountbase.json'),
+    require('./schemas/balance.json'),
+    require('./schemas/blob.json'),
+    require('./schemas/currency.json'),
+    require('./schemas/get-account-info.json'),
+    require('./schemas/get-balances.json'),
+    require('./schemas/get-ledger.json'),
+    require('./schemas/get-orderbook.json'),
+    require('./schemas/get-orders.json'),
+    require('./schemas/get-paths.json'),
+    require('./schemas/get-server-info.json'),
+    require('./schemas/get-settings.json'),
+    require('./schemas/get-transaction.json'),
+    require('./schemas/get-transactions.json'),
+    require('./schemas/get-trustlines.json'),
+    require('./schemas/hash128.json'),
+    require('./schemas/hash256.json'),
+    require('./schemas/instructions.json'),
+    require('./schemas/issue.json'),
+    require('./schemas/ledger-options.json'),
+    require('./schemas/ledgerversion.json'),
+    require('./schemas/max-adjustment.json'),
+    require('./schemas/memo.json'),
+    require('./schemas/order-cancellation-transaction.json'),
+    require('./schemas/order-cancellation.json'),
+    require('./schemas/order-change.json'),
+    require('./schemas/order-transaction.json'),
+    require('./schemas/order.json'),
+    require('./schemas/orderbook-orders.json'),
+    require('./schemas/orderbook.json'),
+    require('./schemas/orders-options.json'),
+    require('./schemas/outcome.json'),
+    require('./schemas/pathfind.json'),
+    require('./schemas/payment-transaction.json'),
+    require('./schemas/payment.json'),
+    require('./schemas/quality.json'),
+    require('./schemas/remote-options.json'),
+    require('./schemas/sequence.json'),
+    require('./schemas/settings-options.json'),
+    require('./schemas/settings-transaction.json'),
+    require('./schemas/settings.json'),
+    require('./schemas/sign.json'),
+    require('./schemas/signed-value.json'),
+    require('./schemas/submit.json'),
+    require('./schemas/suspended-payment-cancellation.json'),
+    require('./schemas/suspended-payment-execution.json'),
+    require('./schemas/suspended-payment-creation.json'),
+    require('./schemas/timestamp.json'),
+    require('./schemas/transaction-options.json'),
+    require('./schemas/transactions-options.json'),
+    require('./schemas/trustline-transaction.json'),
+    require('./schemas/trustline.json'),
+    require('./schemas/trustlines-options.json'),
+    require('./schemas/tx.json'),
+    require('./schemas/uint32.json'),
+    require('./schemas/value.json'),
+    require('./schemas/prepare.json'),
+    require('./schemas/ledger-closed.json')
+  ];
+  const titles = _.map(schemas, schema => schema.title);
+  const duplicates = _.keys(_.pick(_.countBy(titles), count => count > 1));
+  assert(duplicates.length === 0, 'Duplicate schemas for: ' + duplicates);
  return _.indexBy(schemas, 'title');
 }

@@ -43,7 +99,7 @@ function formatSchemaErrors(errors) {
  return errors.map(formatSchemaError).join(', ');
 }

-function schemaValidate(schemaName, object) {
+function schemaValidate(schemaName: string, object: any): void {
  const formats = {address: isValidAddress,
                   ledgerHash: isValidLedgerHash};
  const options = {schemas: SCHEMAS, formats: formats,
@@ -59,5 +115,8 @@ function schemaValidate(schemaName, object) {
  }
 }

-SCHEMAS = loadSchemas(path.join(__dirname, './schemas'));
-module.exports = schemaValidate;
+SCHEMAS = loadSchemas();
+module.exports = {
+  schemaValidate: schemaValidate,
+  SCHEMAS: SCHEMAS
+};
--- a/src/api/common/schemas/adjustment.json
+++ b/src/api/common/schemas/adjustment.json
@@ -4,7 +4,16 @@
  "type": "object",
  "properties": {
    "address": {"$ref": "address"},
-    "amount": {"$ref": "amount"},
+    "amount": {
+      "type": "object",
+      "properties": {
+        "currency": {"$ref": "currency"},
+        "counterparty": {"$ref": "address"},
+        "value": {"$ref": "value"}
+      },
+      "required": ["currency", "value"],
+      "additionalProperties": false
+    },
    "tag": {
      "description": "A string representing an unsigned 32-bit integer most commonly used to refer to a sender's hosted account at a Ripple gateway",
      "$ref": "uint32"
--- a/src/api/common/schemas/balance.json
+++ b/src/api/common/schemas/balance.json
@@ -0,0 +1,44 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "balance",
+  "description": "Balance amount",
+  "type": "object",
+  "properties": {
+    "value": {
+      "description": "The balance on the trustline",
+      "$ref": "signedValue"
+    },
+    "currency": {
+      "description": "The three-character code or hex string used to denote currencies",
+      "$ref": "currency"
+    },
+    "counterparty": {
+      "description": "The Ripple account address of the currency's issuer or gateway",
+      "$ref": "address"
+    }
+  },
+  "additionalProperties": false,
+  "required": ["currency", "value"],
+  "oneOf": [
+    {
+      "properties": {
+        "currency": {
+          "not": {
+            "enum": ["XRP"]
+          }
+        }
+      },
+      "required": ["counterparty"]
+    },
+    {
+      "properties": {
+        "currency": {
+          "enum": ["XRP"]
+        }
+      },
+      "not": {
+        "required": ["counterparty"]
+      }
+    }
+  ]
+}
--- a/src/api/common/schemas/get-account-info.json
+++ b/src/api/common/schemas/get-account-info.json
@@ -0,0 +1,21 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getAccountInfo",
+  "type": "object",
+  "properties": {
+    "sequence": {"$ref": "sequence"},
+    "xrpBalance": {"$ref": "value"},
+    "ownerCount": {"type": "integer", "minimum": 0},
+    "previousInitiatedTransactionID": {"$ref": "hash256"},
+    "previousAffectingTransactionID": {"$ref": "hash256"},
+    "previousAffectingTransactionLedgerVersion": {"$ref": "ledgerVersion"}
+  },
+  "required": [
+    "sequence",
+    "xrpBalance",
+    "ownerCount",
+    "previousAffectingTransactionID",
+    "previousAffectingTransactionLedgerVersion"
+  ],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/get-balances.json
+++ b/src/api/common/schemas/get-balances.json
@@ -0,0 +1,6 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getBalances",
+  "type": "array",
+  "items": {"$ref": "balance"}
+}
--- a/src/api/common/schemas/get-ledger.json
+++ b/src/api/common/schemas/get-ledger.json
@@ -0,0 +1,39 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getLedger",
+  "type": "object",
+  "properties": {
+    "accepted": {"type": "boolean"},
+    "closed": {"type": "boolean"},
+    "stateHash": {"$ref": "hash256"},
+    "closeTime": {"type": "integer", "minimum": 0},
+    "closeTimeResolution": {"type": "integer", "minimum": 1},
+    "closeFlags": {"type": "integer", "minimum": 0},
+    "ledgerHash": {"$ref": "hash256"},
+    "ledgerVersion": {"$ref": "ledgerVersion"},
+    "parentLedgerHash": {"$ref": "hash256"},
+    "parentCloseTime": {"type": "integer", "minimum": 0},
+    "totalDrops": {"$ref": "value"},
+    "transactionHash": {"$ref": "hash256"},
+    "transactions": {"type": "array", "items": {"type": "object"}},
+    "rawTransactions": {"type": "string"},
+    "transactionHashes": {"type": "array", "items": {"$ref": "hash256"}},
+    "rawState": {"type": "string"},
+    "stateHashes": {"type": "array", "items": {"$ref": "hash256"}}
+  },
+  "required": [
+    "accepted",
+    "closed",
+    "stateHash",
+    "closeTime",
+    "closeTimeResolution",
+    "closeFlags",
+    "ledgerHash",
+    "ledgerVersion",
+    "parentLedgerHash",
+    "parentCloseTime",
+    "totalDrops",
+    "transactionHash"
+  ],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/get-orderbook.json
+++ b/src/api/common/schemas/get-orderbook.json
@@ -0,0 +1,11 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getOrderbook",
+  "type": "object",
+  "properties": {
+    "bids": {"$ref": "orderbookOrders"},
+    "asks": {"$ref": "orderbookOrders"}
+  },
+  "required": ["bids", "asks"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/get-orders.json
+++ b/src/api/common/schemas/get-orders.json
@@ -0,0 +1,23 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getOrders",
+  "type": "array",
+  "items": {
+    "type": "object",
+    "properties": {
+      "specification": {"$ref": "order"},
+      "properties": {
+        "type": "object",
+        "properties": {
+          "maker": {"$ref": "address"},
+          "sequence": {"$ref": "sequence"},
+          "makerExchangeRate": {"$ref": "value"}
+        },
+        "required": ["maker", "sequence", "makerExchangeRate"],
+        "addtionalProperties": false
+      }
+    },
+    "required": ["specification", "properties"],
+    "additionalProperties": false
+  }
+}
--- a/src/api/common/schemas/get-paths.json
+++ b/src/api/common/schemas/get-paths.json
@@ -0,0 +1,15 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getPaths",
+  "type": "array",
+  "items": {
+    "type": "object",
+    "properties": {
+      "source": {"$ref": "maxAdjustment"},
+      "destination": {"$ref": "adjustment"},
+      "paths": {"type": "string"}
+    },
+    "required": ["source", "destination", "paths"],
+    "additionalProperties": false
+  }
+}
--- a/src/api/common/schemas/get-server-info.json
+++ b/src/api/common/schemas/get-server-info.json
@@ -0,0 +1,49 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getServerInfo",
+  "type": "object",
+  "properties": {
+    "buildVersion": {"type": "string"},
+    "completeLedgers": {"type": "string", "pattern": "[0-9,-]+"},
+    "hostid": {"type": "string"},
+    "ioLatencyMs": {"type": "number"},
+    "load": {
+      "type": "object",
+      "properties": {
+        "jobTypes": {
+          "type": "array",
+          "items": {"type": "object"}
+        },
+        "threads": {"type": "number"}
+      }
+    },
+    "lastClose": {
+      "type": "object",
+      "properties": {
+        "convergeTimeS": {"type": "number"},
+        "proposers": {"type": "integer", "minimum": 0}
+      }
+    },
+    "loadFactor": {"type": "number"},
+    "peers": {"type": "integer", "minimum": 0},
+    "pubkeyNode": {"type": "string"},
+    "pubkeyValidator": {"type": "string"},
+    "serverState": {
+      "type": "string",
+      "enum": ["disconnected", "connected", "syncing", "tracking", "full", "validating", "proposing"]
+    },
+    "validatedLedger": {
+      "type": "object",
+      "properties": {
+        "age": {"type": "integer", "minimum": 0},
+        "baseFeeXrp": {"type": "number"},
+        "hash": {"$ref": "hash256"},
+        "reserveBaseXrp": {"type": "integer", "minimum": 0},
+        "reserveIncXrp": {"type": "integer", "minimum": 0},
+        "seq": {"type": "integer", "minimum": 0}
+      }
+    },
+    "validationQuorum": {"type": "number"}
+  },
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/get-settings.json
+++ b/src/api/common/schemas/get-settings.json
@@ -0,0 +1,40 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getSettings",
+  "type": "object",
+  "properties": {
+    "passwordSpent": {"type": "boolean"},
+    "requireDestinationTag": {"type": "boolean"},
+    "requireAuthorization": {"type": "boolean"},
+    "disallowIncomingXRP": {"type": "boolean"},
+    "disableMasterKey": {"type": "boolean"},
+    "enableTransactionIDTracking": {"type": "boolean"},
+    "noFreeze": {"type": "boolean"},
+    "globalFreeze": {"type": "boolean"},
+    "defaultRipple": {"type": "boolean"},
+    "emailHash": {
+      "oneOf": [
+        {"type": "null"},
+        {"$ref": "hash128"}
+      ]
+    },
+    "walletLocator": {
+      "oneOf": [
+        {"type": "null"},
+        {"$ref": "hash256"}
+      ]
+    },
+    "walletSize": {"type": ["integer", "null"]},
+    "messageKey": {"type": "string"},
+    "domain": {"type": "string"},
+    "transferRate": {
+      "oneOf": [
+        {"type": "null"},
+        {"type": "number", "minimum": 1, "maximum": 4.294967295}
+      ]
+    },
+    "signers": {"type": "string"},
+    "regularKey": {"$ref": "address"}
+  },
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/get-transaction.json
+++ b/src/api/common/schemas/get-transaction.json
@@ -0,0 +1,11 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getTransaction",
+  "oneOf": [
+    {"$ref": "paymentTransaction"},
+    {"$ref": "orderTransaction"},
+    {"$ref": "orderCancellationTransaction"},
+    {"$ref": "trustlineTransaction"},
+    {"$ref": "settingsTransaction"}
+  ]
+}
--- a/src/api/common/schemas/get-transactions.json
+++ b/src/api/common/schemas/get-transactions.json
@@ -0,0 +1,6 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getTransactions",
+  "type": "array",
+  "items": {"$ref": "getTransaction"}
+}
--- a/src/api/common/schemas/get-trustlines.json
+++ b/src/api/common/schemas/get-trustlines.json
@@ -0,0 +1,29 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "getTrustlines",
+  "type": "array",
+  "items": {
+    "properties": {
+      "specification": {"$ref": "trustline"},
+      "counterparty": {
+        "properties": {
+          "limit": {"$ref": "value"},
+          "ripplingDisabled": {"type": "boolean"},
+          "frozen": {"type": "boolean"},
+          "authorized": {"type": "boolean"}
+        },
+        "required": ["limit"],
+        "additionalProperties": false
+      },
+      "state": {
+        "properties": {
+          "balance": {"$ref": "value"}
+        },
+        "required": ["balance"],
+        "additionalProperties": false
+      }
+    },
+    "required": ["specification", "counterparty", "state"],
+    "additionalProperties": false
+  }
+}
--- a/src/api/common/schemas/ledger-closed.json
+++ b/src/api/common/schemas/ledger-closed.json
@@ -0,0 +1,21 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "ledgerClosed",
+  "description": "A ledgerClosed event message",
+  "type": "object",
+  "properties": {
+    "feeBase": {"type": "integer", "minimum": 0},
+    "feeReference": {"type": "integer", "minimum": 0},
+    "ledgerHash": {"$ref": "ledgerHash"},
+    "ledgerVersion": {"$ref": "ledgerVersion"},
+    "ledgerTimestamp": {"type": "string", "format": "date-time"},
+    "reserveBase": {"type": "integer", "minimum": 0},
+    "reserveIncrement": {"type": "integer", "minimum": 0},
+    "transactionCount": {"type": "integer", "minimum": 0},
+    "validatedLedgerVersions": {"type": "string"}
+  },
+  "addtionalProperties": false,
+  "required": ["feeBase", "feeReference", "ledgerHash", "ledgerTimestamp",
+    "reserveBase", "reserveIncrement", "transactionCount",
+    "ledgerVersion", "validatedLedgerVersions"]
+}
--- a/src/api/common/schemas/ledger-options.json
+++ b/src/api/common/schemas/ledger-options.json
@@ -0,0 +1,13 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "ledger-options",
+  "description": "Options for getLedger",
+  "type": "object",
+  "properties": {
+    "ledgerVersion": {"$ref": "ledgerVersion"},
+    "includeAllData": {"type": "boolean"},
+    "includeTransactions": {"type": "boolean"},
+    "includeState": {"type": "boolean"}
+  },
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/max-adjustment.json
+++ b/src/api/common/schemas/max-adjustment.json
@@ -0,0 +1,24 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "maxAdjustment",
+  "type": "object",
+  "properties": {
+    "address": {"$ref": "address"},
+    "maxAmount": {
+      "type": "object",
+      "properties": {
+        "currency": {"$ref": "currency"},
+        "counterparty": {"$ref": "address"},
+        "value": {"$ref": "value"}
+      },
+      "required": ["currency", "value"],
+      "additionalProperties": false
+    },
+    "tag": {
+      "description": "A string representing an unsigned 32-bit integer most commonly used to refer to a sender's hosted account at a Ripple gateway",
+      "$ref": "uint32"
+    }
+  },
+  "required": ["address", "maxAmount"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/order-cancellation-transaction.json
+++ b/src/api/common/schemas/order-cancellation-transaction.json
@@ -0,0 +1,15 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "orderCancellationTransaction",
+  "type": "object",
+  "properties": {
+    "type": {"enum": ["orderCancellation"]},
+    "specification": {"$ref": "orderCancellation"},
+    "outcome": {"$ref": "outcome"},
+    "id": {"$ref": "hash256"},
+    "address": {"$ref": "address"},
+    "sequence": {"$ref": "sequence"}
+  },
+  "required": ["type", "id", "address", "sequence", "specification", "outcome"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/order-cancellation.json
+++ b/src/api/common/schemas/order-cancellation.json
@@ -1,6 +1,6 @@
 {
  "$schema": "http://json-schema.org/draft-04/schema#",
-  "title": "cancellation",
+  "title": "orderCancellation",
  "type": "object",
  "properties": {
    "orderSequence": {"$ref": "sequence"}
--- a/src/api/common/schemas/order-change.json
+++ b/src/api/common/schemas/order-change.json
@@ -0,0 +1,17 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "orderChange",
+  "type": "object",
+  "properties": {
+    "direction": {
+      "type": "string",
+      "enum": ["buy", "sell"]
+    },
+    "quantity": {"$ref": "balance"},
+    "totalPrice": {"$ref": "balance"},
+    "sequence": {"$ref": "sequence"},
+    "status": {"enum": ["created", "open", "closed", "canceled"]}
+  },
+  "required": ["direction", "quantity", "totalPrice", "sequence", "status"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/order-transaction.json
+++ b/src/api/common/schemas/order-transaction.json
@@ -0,0 +1,15 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "orderTransaction",
+  "type": "object",
+  "properties": {
+    "type": {"enum": ["order"]},
+    "specification": {"$ref": "order"},
+    "outcome": {"$ref": "outcome"},
+    "id": {"$ref": "hash256"},
+    "address": {"$ref": "address"},
+    "sequence": {"$ref": "sequence"}
+  },
+  "required": ["type", "id", "address", "sequence", "specification", "outcome"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/orderbook-orders.json
+++ b/src/api/common/schemas/orderbook-orders.json
@@ -0,0 +1,32 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "orderbookOrders",
+  "type": "array",
+  "items": {
+    "type": "object",
+    "properties": {
+      "specification": {"$ref": "order"},
+      "properties": {
+        "type": "object",
+        "properties": {
+          "maker": {"$ref": "address"},
+          "sequence": {"$ref": "sequence"},
+          "makerExchangeRate": {"$ref": "value"}
+        },
+        "required": ["maker", "sequence", "makerExchangeRate"],
+        "addtionalProperties": false
+      },
+      "state": {
+        "type": "object",
+        "properties": {
+          "fundedAmount": {"$ref": "amount"},
+          "priceOfFundedAmount": {"$ref": "amount"}
+        },
+        "required": ["fundedAmount", "priceOfFundedAmount"],
+        "additionalProperties": false
+      }
+    },
+    "required": ["specification", "properties"],
+    "additionalProperties": false
+  }
+}
--- a/src/api/common/schemas/outcome.json
+++ b/src/api/common/schemas/outcome.json
@@ -0,0 +1,31 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "outcome",
+  "type": "object",
+  "properties": {
+    "result": {"type": "string"},
+    "timestamp": {"type": "string", "format": "date-time"},
+    "fee": {"$ref": "value"},
+    "balanceChanges": {
+      "type": "object",
+      "description": "Key is the ripple address; value is an array of changes",
+      "additionalProperties": {
+        "type": "array",
+        "items": {"$ref": "balance"}
+      }
+    },
+    "orderbookChanges": {
+      "type": "object",
+      "description": "Key is the maker's ripple address; value is an array of changes",
+      "additionalProperties": {
+        "type": "array",
+        "items": {"$ref": "orderChange"}
+      }
+    },
+    "ledgerVersion": {"$ref": "ledgerVersion"},
+    "indexInLedger": {"type": "integer", "minimum": 0}
+  },
+  "required": ["result", "fee", "balanceChanges",
+    "orderbookChanges", "ledgerVersion", "indexInLedger"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/payment-transaction.json
+++ b/src/api/common/schemas/payment-transaction.json
@@ -0,0 +1,15 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "paymentTransaction",
+  "type": "object",
+  "properties": {
+    "type": {"enum": ["payment"]},
+    "specification": {"$ref": "payment"},
+    "outcome": {"$ref": "outcome"},
+    "id": {"$ref": "hash256"},
+    "address": {"$ref": "address"},
+    "sequence": {"$ref": "sequence"}
+  },
+  "required": ["type", "id", "address", "sequence", "specification", "outcome"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/payment.json
+++ b/src/api/common/schemas/payment.json
@@ -3,13 +3,9 @@
  "title": "payment",
  "type": "object",
  "properties": {
-    "source": {"$ref": "adjustment"},
+    "source": {"$ref": "maxAdjustment"},
    "destination": {"$ref": "adjustment"},
    "paths": {"type": "string"},
-    "slippage": {
-      "description": "An optional cushion for the source_amount to increase the likelihood that the payment will succeed. The source_account will never be charged more than source_amount.value + source_slippage",
-      "$ref": "value"
-    },
    "memos": {
      "type": "array",
      "items": {
--- a/src/api/common/schemas/prepare.json
+++ b/src/api/common/schemas/prepare.json
@@ -0,0 +1,21 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "prepare",
+  "description": "Result of prepare function",
+  "type": "object",
+  "properties": {
+    "txJSON": {"type": "string"},
+    "instructions": {
+      "type": "object",
+      "properties": {
+        "fee": {"$ref": "value"},
+        "sequence": {"$ref": "sequence"},
+        "maxLedgerVersion": {"$ref": "ledgerVersion"}
+      },
+      "additionalProperties": false,
+      "required": ["fee", "sequence"]
+    }
+  },
+  "additionalProperties": false,
+  "required": ["txJSON", "instructions"]
+}
--- a/src/api/common/schemas/quality.json
+++ b/src/api/common/schemas/quality.json
@@ -1,8 +1,8 @@
 {
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "quality",
-  "description": "Ratio for incoming/outgoing transit fees represented in billionths. (For example, a value of 500 million represents a 0.5:1 ratio.) As a special case, 0 is treated as a 1:1 ratio.",
-  "type": "integer",
-  "minimum": 0,
-  "maximum": 1000000000
+  "description": "Ratio for incoming/outgoing transit fees.",
+  "type": "number",
+  "minimum": 0.000000001,
+  "maximum": 4.294967295
 }
--- a/src/api/common/schemas/remote-options.json
+++ b/src/api/common/schemas/remote-options.json
@@ -0,0 +1,17 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "remote-options",
+  "type": "object",
+  "properties": {
+    "trace": {"type": "boolean"},
+    "servers": {
+      "type": "array",
+      "items": {
+        "type": "string",
+        "format": "uri",
+        "pattern": "^wss?://"
+      }
+    }
+  },
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/settings-transaction.json
+++ b/src/api/common/schemas/settings-transaction.json
@@ -0,0 +1,15 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "settingsTransaction",
+  "type": "object",
+  "properties": {
+    "type": {"enum": ["settings"]},
+    "specification": {"$ref": "getSettings"},
+    "outcome": {"$ref": "outcome"},
+    "id": {"$ref": "hash256"},
+    "address": {"$ref": "address"},
+    "sequence": {"$ref": "sequence"}
+  },
+  "required": ["type", "id", "address", "sequence", "specification"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/settings.json
+++ b/src/api/common/schemas/settings.json
@@ -1,27 +1,13 @@
 {
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "settings",
-  "type": "object",
-  "properties": {
-    "passwordSpent": {"type": "boolean"},
-    "requireDestinationTag": {"type": "boolean"},
-    "requireAuthorization": {"type": "boolean"},
-    "disallowIncomingXRP": {"type": "boolean"},
-    "disableMasterKey": {"type": "boolean"},
-    "enableTransactionIDTracking": {"type": "boolean"},
-    "noFreeze": {"type": "boolean"},
-    "globalFreeze": {"type": "boolean"},
-    "defaultRipple": {"type": "boolean"},
-    "emailHash": {"$ref": "hash128"},
-    "walletLocator": {"$ref": "hash256"},
-    "walletSize": {"type": "integer"},
-    "messageKey": {"type": "string"},
-    "domain": {"type": "string"},
-    "transferRate": {"type": "integer"},
-    "signers": {"type": "string"},
-    "regularKey": {"$ref": "address"}
-  },
-  "minProperties": 1,
-  "maxProperties": 1,
-  "additionalProperties": false
+  "allOf": [
+    {
+      "$ref": "getSettings"
+    },
+    {
+      "minProperties": 1,
+      "maxProperties": 1
+    }
+  ]
 }
--- a/src/api/common/schemas/sign.json
+++ b/src/api/common/schemas/sign.json
@@ -0,0 +1,14 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "sign",
+  "type": "object",
+  "properties": {
+    "signedTransaction": {
+      "type": "string",
+      "pattern": "^[A-F0-9]+$"
+    },
+    "id": {"$ref": "hash256"}
+  },
+  "required": ["signedTransaction", "id"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/signed-value.json
+++ b/src/api/common/schemas/signed-value.json
@@ -0,0 +1,7 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "signedValue",
+  "description": "A string representation of a floating point number",
+  "type": "string",
+  "pattern": "^[-]?[0-9]*[.]?[0-9]+([eE][-+]?[0-9]+)?$"
+}
--- a/src/api/common/schemas/submit.json
+++ b/src/api/common/schemas/submit.json
@@ -0,0 +1,15 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "submit",
+  "type": "object",
+  "properties": {
+    "success": {"type": "boolean"},
+    "engineResult": {"type": "string"},
+    "engineResultCode": {"type": "integer"},
+    "engineResultMessage": {"type": "string"},
+    "txBlob": {"type": "string"},
+    "txJson": {"type": "object"}
+  },
+  "required": ["success", "engineResult", "engineResultCode"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/suspended-payment-cancellation.json
+++ b/src/api/common/schemas/suspended-payment-cancellation.json
@@ -0,0 +1,17 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "suspended-payment-cancellation",
+  "type": "object",
+  "properties": {
+    "memos": {
+      "type": "array",
+      "items": {
+        "$ref": "memo"
+      }
+    },
+    "owner": {"$ref": "address"},
+    "paymentSequence": {"$ref": "uint32"}
+  },
+  "required": ["owner", "paymentSequence"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/suspended-payment-creation.json
+++ b/src/api/common/schemas/suspended-payment-creation.json
@@ -0,0 +1,28 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "suspended-payment-creation",
+  "type": "object",
+  "properties": {
+    "source": {"$ref": "maxAdjustment"},
+    "destination": {"$ref": "adjustment"},
+    "memos": {
+      "type": "array",
+      "items": {
+        "$ref": "memo"
+      }
+    },
+    "digest": {"$ref": "hash256"},
+    "allowCancelAfter": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "milliseconds since unix epoch"
+    },
+    "allowExecuteAfter": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "milliseconds since unix epoch"
+    }
+  },
+  "required": ["source", "destination"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/suspended-payment-execution.json
+++ b/src/api/common/schemas/suspended-payment-execution.json
@@ -0,0 +1,20 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "suspended-payment-execution",
+  "type": "object",
+  "properties": {
+    "memos": {
+      "type": "array",
+      "items": {
+        "$ref": "memo"
+      }
+    },
+    "owner": {"$ref": "address"},
+    "paymentSequence": {"$ref": "uint32"},
+    "method": {"type": "integer", "minimum": 0, "maximum": 255},
+    "digest": {"$ref": "hash256"},
+    "proof": {"type": "string"}
+  },
+  "required": ["owner", "paymentSequence"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/trustline-transaction.json
+++ b/src/api/common/schemas/trustline-transaction.json
@@ -0,0 +1,15 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "trustlineTransaction",
+  "type": "object",
+  "properties": {
+    "type": {"enum": ["trustline"]},
+    "specification": {"$ref": "trustline"},
+    "outcome": {"$ref": "outcome"},
+    "id": {"$ref": "hash256"},
+    "address": {"$ref": "address"},
+    "sequence": {"$ref": "sequence"}
+  },
+  "required": ["type", "id", "address", "sequence", "specification", "outcome"],
+  "additionalProperties": false
+}
--- a/src/api/common/schemas/trustline.json
+++ b/src/api/common/schemas/trustline.json
@@ -8,7 +8,7 @@
    "limit": {"$ref": "value"},
    "qualityIn": {"$ref": "quality"},
    "qualityOut": {"$ref": "quality"},
-    "allowRippling": {"type": "boolean"},
+    "ripplingDisabled": {"type": "boolean"},
    "authorized": {"type": "boolean"},
    "frozen": {"type": "boolean"}
  },
--- a/src/api/common/utils.js
+++ b/src/api/common/utils.js
@@ -1,17 +1,23 @@
+/* @flow */
 'use strict';
+const _ = require('lodash');
 const BigNumber = require('bignumber.js');
 const core = require('../../core');
 const errors = require('./errors');
+const es6promisify = require('es6-promisify');
+const keypairs = require('ripple-keypairs');

-function dropsToXrp(drops) {
+type Amount = {currency: string, issuer: string, value: string}
+
+function dropsToXrp(drops: string): string {
  return (new BigNumber(drops)).dividedBy(1000000.0).toString();
 }

-function xrpToDrops(xrp) {
+function xrpToDrops(xrp: string): string {
  return (new BigNumber(xrp)).times(1000000.0).floor().toString();
 }

-function toRippledAmount(amount) {
+function toRippledAmount(amount: Amount): string|Amount {
  if (amount.currency === 'XRP') {
    return xrpToDrops(amount.value);
  }
@@ -22,7 +28,14 @@ function toRippledAmount(amount) {
  };
 }

-function wrapCatch(asyncFunction: () => void): () => void {
+function generateAddress(options?: Object): Object {
+  const {accountID, seed} = keypairs.generateWallet(options);
+  return {secret: seed, address: accountID};
+}
+
+type AsyncFunction = (...x: any) => void
+
+function wrapCatch(asyncFunction: AsyncFunction): AsyncFunction {
  return function() {
    try {
      asyncFunction.apply(this, arguments);
@@ -33,10 +46,13 @@ function wrapCatch(asyncFunction: () => void): () => void {
  };
 }

-function composeAsync(wrapper, callback) {
+type Callback = (err: any, data: any) => void
+type Wrapper = (data: any) => any
+
+function composeAsync(wrapper: Wrapper, callback: Callback): Callback {
  return function(error, data) {
    if (error) {
-      callback(error);
+      callback(error, data);
      return;
    }
    let result;
@@ -50,7 +66,22 @@ function composeAsync(wrapper, callback) {
  };
 }

-function convertExceptions(f) {
+function convertErrors(callback: Callback): () => void {
+  return function(error, data) {
+    if (error && !(error instanceof errors.RippleError)) {
+      const error_ = new errors.RippleError(error);
+      error_.data = data;
+      callback(error_, data);
+    } else if (error) {
+      error.data = data;
+      callback(error, data);
+    } else {
+      callback(error, data);
+    }
+  };
+}
+
+function convertExceptions<T>(f: () => T): () => T {
  return function() {
    try {
      return f.apply(this, arguments);
@@ -60,12 +91,36 @@ function convertExceptions(f) {
  };
 }

+const FINDSNAKE = /([a-zA-Z]_[a-zA-Z])/g;
+function convertKeysFromSnakeCaseToCamelCase(obj: any): any {
+  if (typeof obj === 'object') {
+    let newKey;
+    return _.reduce(obj, (result, value, key) => {
+      newKey = key;
+      if (FINDSNAKE.test(key)) {
+        newKey = key.replace(FINDSNAKE, r => r[0] + r[2].toUpperCase());
+      }
+      result[newKey] = convertKeysFromSnakeCaseToCamelCase(value);
+      return result;
+    }, {});
+  }
+  return obj;
+}
+
+function promisify(asyncFunction: AsyncFunction): Function {
+  return es6promisify(wrapCatch(asyncFunction));
+}
+
 module.exports = {
  core,
  dropsToXrp,
  xrpToDrops,
  toRippledAmount,
-  wrapCatch,
+  generateAddress,
  composeAsync,
-  convertExceptions
+  wrapCatch,
+  convertExceptions,
+  convertErrors,
+  convertKeysFromSnakeCaseToCamelCase,
+  promisify
 };
--- a/src/api/common/validate.js
+++ b/src/api/common/validate.js
@@ -1,26 +1,38 @@
+/* @flow */
 'use strict';
 const _ = require('lodash');
 const core = require('./utils').core;
 const ValidationError = require('./errors').ValidationError;
-const schemaValidate = require('./schema-validator');
+const schemaValidate = require('./schema-validator').schemaValidate;

 function error(text) {
  return new ValidationError(text);
 }

-function validateAddressAndSecret(obj) {
+function validateAddressAndSecret(obj: {address: string, secret: string}
+): void {
  const address = obj.address;
  const secret = obj.secret;
  schemaValidate('address', address);
  if (!secret) {
    throw error('Parameter missing: secret');
  }
-  try {
-    if (!core.Seed.from_json(secret).get_key(address)) {
-      throw error('secret does not match address');
-    }
-  } catch (exception) {
-    throw error('secret does not match address');
+  if (!core.Seed.from_json(secret).is_valid()) {
+    throw error('secret is invalid');
+  }
+}
+
+function validateSecret(secret: string): void {
+  if (!secret) {
+    throw error('Parameter missing: secret');
+  }
+  if (typeof secret !== 'string' || secret[0] !== 's') {
+    throw error('Invalid parameter');
+  }
+
+  const seed = new core.Seed().parse_base58(secret);
+  if (!seed.is_valid()) {
+    throw error('invalid seed');
  }
 }

@@ -41,12 +53,20 @@ function validateOptions(schema, options) {
 module.exports = {
  address: _.partial(schemaValidate, 'address'),
  addressAndSecret: validateAddressAndSecret,
+  secret: validateSecret,
  currency: _.partial(schemaValidate, 'currency'),
  identifier: _.partial(schemaValidate, 'hash256'),
+  ledgerVersion: _.partial(schemaValidate, 'ledgerVersion'),
  sequence: _.partial(schemaValidate, 'sequence'),
  order: _.partial(schemaValidate, 'order'),
  orderbook: _.partial(schemaValidate, 'orderbook'),
  payment: _.partial(schemaValidate, 'payment'),
+  suspendedPaymentCreation:
+    _.partial(schemaValidate, 'suspended-payment-creation'),
+  suspendedPaymentExecution:
+    _.partial(schemaValidate, 'suspended-payment-execution'),
+  suspendedPaymentCancellation:
+    _.partial(schemaValidate, 'suspended-payment-cancellation'),
  pathfind: _.partial(schemaValidate, 'pathfind'),
  settings: _.partial(schemaValidate, 'settings'),
  trustline: _.partial(schemaValidate, 'trustline'),
@@ -60,6 +80,8 @@ module.exports = {
  getOrdersOptions: _.partial(validateOptions, 'orders-options'),
  getOrderbookOptions: _.partial(validateOptions, 'orders-options'),
  getTransactionOptions: _.partial(validateOptions, 'transaction-options'),
+  getLedgerOptions: _.partial(validateOptions, 'ledger-options'),
  options: _.partial(validateOptions, 'options'),
+  remoteOptions: _.partial(schemaValidate, 'remote-options'),
  instructions: _.partial(schemaValidate, 'instructions')
 };
--- a/src/api/index.js
+++ b/src/api/index.js
@@ -2,7 +2,9 @@

 'use strict';
 const _ = require('lodash');
-const core = require('./common').core;
+const util = require('util');
+const EventEmitter = require('events').EventEmitter;
+const common = require('./common');
 const server = require('./server/server');
 const connect = server.connect;
 const disconnect = server.disconnect;
@@ -23,19 +25,36 @@ const preparePayment = require('./transaction/payment');
 const prepareTrustline = require('./transaction/trustline');
 const prepareOrder = require('./transaction/order');
 const prepareOrderCancellation = require('./transaction/ordercancellation');
+const prepareSuspendedPaymentCreation =
+  require('./transaction/suspended-payment-creation');
+const prepareSuspendedPaymentExecution =
+  require('./transaction/suspended-payment-execution');
+const prepareSuspendedPaymentCancellation =
+  require('./transaction/suspended-payment-cancellation');
 const prepareSettings = require('./transaction/settings');
 const sign = require('./transaction/sign');
 const submit = require('./transaction/submit');
 const errors = require('./common').errors;
 const convertExceptions = require('./common').convertExceptions;
-const generateWallet = convertExceptions(core.Wallet.generate);
+const generateAddress = convertExceptions(common.generateAddress);
+const computeLedgerHash = require('./offline/ledgerhash');
+const getLedger = require('./ledger/ledger');

 function RippleAPI(options: {}) {
+  common.validate.remoteOptions(options);
+  if (EventEmitter instanceof Function) { // always true, needed for flow
+    EventEmitter.call(this);
+  }
  const _options = _.assign({}, options, {automatic_resubmission: false});
-  this.remote = new core.Remote(_options);
+  this.remote = new common.core.Remote(_options);
+  this.remote.on('ledger_closed', message => {
+    this.emit('ledgerClosed', server.formatLedgerClose(message));
+  });
 }

-RippleAPI.prototype = {
+util.inherits(RippleAPI, EventEmitter);
+
+_.assign(RippleAPI.prototype, {
  connect,
  disconnect,
  isConnected,
@@ -52,17 +71,29 @@ RippleAPI.prototype = {
  getOrderbook,
  getSettings,
  getAccountInfo,
+  getLedger,

  preparePayment,
  prepareTrustline,
  prepareOrder,
  prepareOrderCancellation,
+  prepareSuspendedPaymentCreation,
+  prepareSuspendedPaymentExecution,
+  prepareSuspendedPaymentCancellation,
  prepareSettings,
  sign,
  submit,

-  generateWallet,
+  generateAddress,
  errors
+});
+
+// these are exposed only for use by unit tests; they are not part of the API
+RippleAPI._PRIVATE = {
+  common,
+  computeLedgerHash,
+  ledgerUtils: require('./ledger/utils'),
+  schemaValidator: require('./common/schema-validator')
 };

 module.exports = RippleAPI;
--- a/src/api/ledger/accountinfo.js
+++ b/src/api/ledger/accountinfo.js
@@ -5,8 +5,45 @@ const utils = require('./utils');
 const removeUndefined = require('./parse/utils').removeUndefined;
 const validate = utils.common.validate;
 const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;

-function formatAccountInfo(response) {
+type AccountData = {
+  Sequence: number,
+  Account: string,
+  Balance: string,
+  Flags: number,
+  LedgerEntryType: string,
+  OwnerCount: number,
+  PreviousTxnID: string,
+  AccountTxnID?: string,
+  PreviousTxnLgrSeq: number,
+  index: string
+}
+
+type AccountDataResponse = {
+  account_data: AccountData,
+  ledger_current_index?: number,
+  ledger_hash?: string,
+  ledger_index: number,
+  validated: boolean
+}
+
+type AccountInfoOptions = {
+  ledgerVersion?: number
+}
+
+type AccountInfoCallback = (err: any, data: AccountInfoResponse) => void
+
+type AccountInfoResponse = {
+  sequence: number,
+  xrpBalance: string,
+  ownerCount: number,
+  previousInitiatedTransactionID: string,
+  previousAffectingTransactionID: string,
+  previousAffectingTransactionLedgerVersion: number
+}
+
+function formatAccountInfo(response: AccountDataResponse) {
  const data = response.account_data;
  return removeUndefined({
    sequence: data.Sequence,
@@ -18,17 +55,24 @@ function formatAccountInfo(response) {
  });
 }

-function getAccountInfo(account, options, callback) {
+function getAccountInfoAsync(account: string, options: AccountInfoOptions,
+                             callback: AccountInfoCallback
+) {
  validate.address(account);
  validate.getAccountInfoOptions(options);

  const request = {
    account: account,
-    ledger: options.ledgerVersion
+    ledger: options.ledgerVersion || 'validated'
  };

  this.remote.requestAccountInfo(request,
-    composeAsync(formatAccountInfo, callback));
+    composeAsync(formatAccountInfo, convertErrors(callback)));
 }

-module.exports = utils.wrapCatch(getAccountInfo);
+function getAccountInfo(account: string, options: AccountInfoOptions = {}
+): Promise<AccountInfoResponse> {
+  return utils.promisify(getAccountInfoAsync).call(this, account, options);
+}
+
+module.exports = getAccountInfo;
--- a/src/api/ledger/balances.js
+++ b/src/api/ledger/balances.js
@@ -6,6 +6,7 @@ const utils = require('./utils');
 const getTrustlines = require('./trustlines');
 const validate = utils.common.validate;
 const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;

 function getTrustlineBalanceAmount(trustline) {
  return {
@@ -24,7 +25,13 @@ function formatBalances(balances) {
    balances.trustlines.map(getTrustlineBalanceAmount));
 }

-function getBalances(account, options, callback) {
+function getTrustlinesAsync(account, options, callback) {
+  getTrustlines.call(this, account, options)
+    .then(data => callback(null, data))
+    .catch(callback);
+}
+
+function getBalancesAsync(account, options, callback) {
  validate.address(account);
  validate.getBalancesOptions(options);

@@ -32,8 +39,12 @@ function getBalances(account, options, callback) {
                      || this.remote.getLedgerSequence();
  async.parallel({
    xrp: _.partial(utils.getXRPBalance, this.remote, account, ledgerVersion),
-    trustlines: _.partial(getTrustlines.bind(this), account, options)
-  }, composeAsync(formatBalances, callback));
+    trustlines: _.partial(getTrustlinesAsync.bind(this), account, options)
+  }, composeAsync(formatBalances, convertErrors(callback)));
 }

-module.exports = utils.wrapCatch(getBalances);
+function getBalances(account: string, options = {}) {
+  return utils.promisify(getBalancesAsync).call(this, account, options);
+}
+
+module.exports = getBalances;
--- a/src/api/ledger/ledger.js
+++ b/src/api/ledger/ledger.js
@@ -0,0 +1,28 @@
+/* @flow */
+'use strict';
+const utils = require('./utils');
+const validate = utils.common.validate;
+const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;
+const parseLedger = require('./parse/ledger');
+
+function getLedgerAsync(options, callback) {
+  validate.getLedgerOptions(options);
+
+  const request = {
+    ledger: options.ledgerVersion || 'validated',
+    expand: options.includeAllData,
+    transactions: options.includeTransactions,
+    accounts: options.includeState
+  };
+
+  this.remote.requestLedger(request,
+    composeAsync(response => parseLedger(response.ledger),
+    convertErrors(callback)));
+}
+
+function getLedger(options = {}) {
+  return utils.promisify(getLedgerAsync).call(this, options);
+}
+
+module.exports = getLedger;
--- a/src/api/ledger/orderbook.js
+++ b/src/api/ledger/orderbook.js
@@ -3,21 +3,23 @@
 const _ = require('lodash');
 const async = require('async');
 const utils = require('./utils');
-const parseOrderbookOrder = require('./parse/orderbook-order');
 const validate = utils.common.validate;
 const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;
+const parseOrderbookOrder = require('./parse/orderbook-order');

 // account is to specify a "perspective", which affects which unfunded offers
 // are returned
 function getBookOffers(remote, account, ledgerVersion, limit,
-    takerGets, takerPays, callback) {
+    takerGets, takerPays, callback
+) {
  remote.requestBookOffers(utils.renameCounterpartyToIssuerInOrder({
    taker_gets: takerGets,
    taker_pays: takerPays,
    ledger: ledgerVersion || 'validated',
    limit: limit,
    taker: account
-  }), composeAsync(data => data.offers, callback));
+  }), composeAsync(data => data.offers, convertErrors(callback)));
 }

 function isSameIssue(a, b) {
@@ -62,7 +64,7 @@ function formatBidsAndAsks(orderbook, offers) {
  return {bids, asks};
 }

-function getOrderbook(account, orderbook, options, callback) {
+function getOrderbookAsync(account, orderbook, options, callback) {
  validate.address(account);
  validate.orderbook(orderbook);
  validate.getOrderbookOptions(options);
@@ -76,4 +78,9 @@ function getOrderbook(account, orderbook, options, callback) {
                 callback));
 }

-module.exports = utils.wrapCatch(getOrderbook);
+function getOrderbook(account: string, orderbook: Object, options = {}) {
+  return utils.promisify(getOrderbookAsync).call(this,
+    account, orderbook, options);
+}
+
+module.exports = getOrderbook;
--- a/src/api/ledger/orders.js
+++ b/src/api/ledger/orders.js
@@ -4,10 +4,12 @@ const _ = require('lodash');
 const utils = require('./utils');
 const validate = utils.common.validate;
 const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;
 const parseAccountOrder = require('./parse/account-order');

-function requestAccountOffers(remote, address, ledgerVersion, options,
-    marker, limit, callback) {
+function requestAccountOffers(remote, address, ledgerVersion, marker, limit,
+  callback
+) {
  remote.requestAccountOffers({
    account: address,
    marker: marker,
@@ -17,20 +19,24 @@ function requestAccountOffers(remote, address, ledgerVersion, options,
  composeAsync((data) => ({
    marker: data.marker,
    results: data.offers.map(_.partial(parseAccountOrder, address))
-  }), callback));
+  }), convertErrors(callback)));
 }

-function getOrders(account, options, callback) {
+function getOrdersAsync(account, options, callback) {
  validate.address(account);
  validate.getOrdersOptions(options);

  const ledgerVersion = options.ledgerVersion
                      || this.remote.getLedgerSequence();
  const getter = _.partial(requestAccountOffers, this.remote, account,
-                           ledgerVersion, options);
+                           ledgerVersion);
  utils.getRecursive(getter, options.limit,
    composeAsync((orders) => _.sortBy(orders,
      (order) => order.properties.sequence), callback));
 }

-module.exports = utils.wrapCatch(getOrders);
+function getOrders(account: string, options = {}) {
+  return utils.promisify(getOrdersAsync).call(this, account, options);
+}
+
+module.exports = getOrders;
--- a/src/api/ledger/parse/fields.js
+++ b/src/api/ledger/parse/fields.js
@@ -1,11 +1,15 @@
 /* @flow */
 'use strict';
+const BigNumber = require('bignumber.js');
 const AccountFields = require('./utils').constants.AccountFields;

 function parseField(info, value) {
  if (info.encoding === 'hex' && !info.length) {
    return new Buffer(value, 'hex').toString('ascii');
  }
+  if (info.shift) {
+    return (new BigNumber(value)).shift(-info.shift).toNumber();
+  }
  return value;
 }

--- a/src/api/ledger/parse/ledger.js
+++ b/src/api/ledger/parse/ledger.js
@@ -0,0 +1,50 @@
+/* @flow */
+'use strict';
+const _ = require('lodash');
+const removeUndefined = require('./utils').removeUndefined;
+const parseTransaction = require('./transaction');
+
+function parseTransactions(transactions) {
+  if (_.isEmpty(transactions)) {
+    return {};
+  }
+  if (_.isString(transactions[0])) {
+    return {transactionHashes: transactions};
+  }
+  return {
+    transactions: _.map(transactions, parseTransaction),
+    rawTransactions: JSON.stringify(transactions)
+  };
+}
+
+function parseState(state) {
+  if (_.isEmpty(state)) {
+    return {};
+  }
+  if (_.isString(state[0])) {
+    return {stateHashes: state};
+  }
+  return {rawState: JSON.stringify(state)};
+}
+
+function parseLedger(ledger: Object): Object {
+  return removeUndefined(_.assign({
+    accepted: ledger.accepted,
+    closed: ledger.closed,
+    stateHash: ledger.account_hash,
+    closeTime: ledger.close_time,
+    closeTimeResolution: ledger.close_time_resolution,
+    closeFlags: ledger.close_flags,
+    ledgerHash: ledger.hash || ledger.ledger_hash,
+    ledgerVersion: parseInt(ledger.ledger_index || ledger.seqNum, 10),
+    parentLedgerHash: ledger.parent_hash,
+    parentCloseTime: ledger.parent_close_time,
+    totalDrops: ledger.total_coins || ledger.totalCoins,
+    transactionHash: ledger.transaction_hash
+  },
+  parseTransactions(ledger.transactions),
+  parseState(ledger.accountState)
+  ));
+}
+
+module.exports = parseLedger;
--- a/src/api/ledger/parse/pathfind.js
+++ b/src/api/ledger/parse/pathfind.js
@@ -9,12 +9,13 @@ function parsePaths(paths) {
 }

 function parsePathfind(sourceAddress: string,
-    destinationAmount: Object, pathfindResult: Object): Object {
+    destinationAmount: Object, pathfindResult: Object
+): Object {
  return pathfindResult.alternatives.map(function(alternative) {
    return {
      source: {
        address: sourceAddress,
-        amount: parseAmount(alternative.source_amount)
+        maxAmount: parseAmount(alternative.source_amount)
      },
      destination: {
        address: pathfindResult.destination_account,
--- a/src/api/ledger/parse/payment.js
+++ b/src/api/ledger/parse/payment.js
@@ -1,5 +1,6 @@
 /* @flow */
 'use strict';
+const _ = require('lodash');
 const assert = require('assert');
 const utils = require('./utils');
 const parseAmount = require('./amount');
@@ -17,17 +18,9 @@ function isQualityLimited(tx) {
  return (tx.Flags & Transaction.flags.Payment.LimitQuality) !== 0;
 }

-function parsePaymentMemos(tx) {
-  if (!Array.isArray(tx.Memos) || tx.Memos.length === 0) {
-    return undefined;
-  }
-  return tx.Memos.map((m) => {
-    return utils.removeUndefined({
-      type: m.Memo.parsed_memo_type,
-      format: m.Memo.parsed_memo_format,
-      data: m.Memo.parsed_memo_data
-    });
-  });
+function removeGenericCounterparty(amount, address) {
+  return amount.counterparty === address ?
+    _.omit(amount, 'counterparty') : amount;
 }

 function parsePayment(tx: Object): Object {
@@ -35,20 +28,21 @@ function parsePayment(tx: Object): Object {

  const source = {
    address: tx.Account,
-    amount: parseAmount(tx.SendMax || tx.Amount),
+    maxAmount: removeGenericCounterparty(
+      parseAmount(tx.SendMax || tx.Amount), tx.Account),
    tag: tx.SourceTag
  };

  const destination = {
    address: tx.Destination,
-    amount: parseAmount(tx.Amount),
+    amount: removeGenericCounterparty(parseAmount(tx.Amount), tx.Destination),
    tag: tx.DestinationTag
  };

  return utils.removeUndefined({
    source: utils.removeUndefined(source),
    destination: utils.removeUndefined(destination),
-    memos: parsePaymentMemos(tx),
+    memos: utils.parseMemos(tx),
    invoiceID: tx.InvoiceID,
    paths: tx.Paths ? JSON.stringify(tx.Paths) : undefined,
    allowPartialPayment: isPartialPayment(tx) || undefined,
--- a/src/api/ledger/parse/suspended-payment-cancellation.js
+++ b/src/api/ledger/parse/suspended-payment-cancellation.js
@@ -0,0 +1,16 @@
+/* @flow */
+'use strict';
+const assert = require('assert');
+const utils = require('./utils');
+
+function parseSuspendedPaymentCancellation(tx: Object): Object {
+  assert(tx.TransactionType === 'SuspendedPaymentCancel');
+
+  return utils.removeUndefined({
+    memos: utils.parseMemos(tx),
+    owner: tx.Owner,
+    paymentSequence: tx.OfferSequence
+  });
+}
+
+module.exports = parseSuspendedPaymentCancellation;
--- a/src/api/ledger/parse/suspended-payment-creation.js
+++ b/src/api/ledger/parse/suspended-payment-creation.js
@@ -0,0 +1,39 @@
+/* @flow */
+'use strict';
+const _ = require('lodash');
+const assert = require('assert');
+const utils = require('./utils');
+const parseAmount = require('./amount');
+
+function removeGenericCounterparty(amount, address) {
+  return amount.counterparty === address ?
+    _.omit(amount, 'counterparty') : amount;
+}
+
+function parseSuspendedPaymentCreation(tx: Object): Object {
+  assert(tx.TransactionType === 'SuspendedPaymentCreate');
+
+  const source = {
+    address: tx.Account,
+    maxAmount: removeGenericCounterparty(
+      parseAmount(tx.SendMax || tx.Amount), tx.Account),
+    tag: tx.SourceTag
+  };
+
+  const destination = {
+    address: tx.Destination,
+    amount: removeGenericCounterparty(parseAmount(tx.Amount), tx.Destination),
+    tag: tx.DestinationTag
+  };
+
+  return utils.removeUndefined({
+    source: utils.removeUndefined(source),
+    destination: utils.removeUndefined(destination),
+    memos: utils.parseMemos(tx),
+    digest: tx.Digest,
+    allowCancelAfter: tx.CancelAfter,
+    allowExecuteAfter: tx.FinishAfter
+  });
+}
+
+module.exports = parseSuspendedPaymentCreation;
--- a/src/api/ledger/parse/suspended-payment-execution.js
+++ b/src/api/ledger/parse/suspended-payment-execution.js
@@ -0,0 +1,25 @@
+/* @flow */
+'use strict';
+const assert = require('assert');
+const sjclcodec = require('sjcl-codec');
+const utils = require('./utils');
+
+function convertHexToString(hexString) {
+  const bits = sjclcodec.hex.toBits(hexString);
+  return sjclcodec.utf8String.fromBits(bits);
+}
+
+function parseSuspendedPaymentExecution(tx: Object): Object {
+  assert(tx.TransactionType === 'SuspendedPaymentFinish');
+
+  return utils.removeUndefined({
+    memos: utils.parseMemos(tx),
+    owner: tx.Owner,
+    paymentSequence: tx.OfferSequence,
+    method: tx.Method,
+    digest: tx.Digest,
+    proof: tx.Proof ? convertHexToString(tx.Proof) : undefined
+  });
+}
+
+module.exports = parseSuspendedPaymentExecution;
--- a/src/api/ledger/parse/transaction.js
+++ b/src/api/ledger/parse/transaction.js
@@ -7,6 +7,10 @@ const parseTrustline = require('./trustline');
 const parseOrder = require('./order');
 const parseOrderCancellation = require('./cancellation');
 const parseSettings = require('./settings');
+const parseSuspendedPaymentCreation = require('./suspended-payment-creation');
+const parseSuspendedPaymentExecution = require('./suspended-payment-execution');
+const parseSuspendedPaymentCancellation =
+  require('./suspended-payment-cancellation');

 function parseTransactionType(type) {
  const mapping = {
@@ -15,7 +19,10 @@ function parseTransactionType(type) {
    OfferCreate: 'order',
    OfferCancel: 'orderCancellation',
    AccountSet: 'settings',
-    SetRegularKey: 'settings'
+    SetRegularKey: 'settings',
+    SuspendedPaymentCreate: 'suspendedPaymentCreation',
+    SuspendedPaymentFinish: 'suspendedPaymentExecution',
+    SuspendedPaymentCancel: 'suspendedPaymentCancellation'
  };
  return mapping[type] || null;
 }
@@ -27,7 +34,10 @@ function parseTransaction(tx: Object): Object {
    'trustline': parseTrustline,
    'order': parseOrder,
    'orderCancellation': parseOrderCancellation,
-    'settings': parseSettings
+    'settings': parseSettings,
+    'suspendedPaymentCreation': parseSuspendedPaymentCreation,
+    'suspendedPaymentExecution': parseSuspendedPaymentExecution,
+    'suspendedPaymentCancellation': parseSuspendedPaymentCancellation
  };
  const parser = mapping[type];
  assert(parser !== undefined, 'Unrecognized transaction type');
--- a/src/api/ledger/parse/trustline.js
+++ b/src/api/ledger/parse/trustline.js
@@ -3,6 +3,7 @@
 const assert = require('assert');
 const utils = require('./utils');
 const flags = utils.core.Transaction.flags.TrustSet;
+const BigNumber = require('bignumber.js');

 function parseFlag(flagsValue, trueValue, falseValue) {
  if (flagsValue & trueValue) {
@@ -14,6 +15,13 @@ function parseFlag(flagsValue, trueValue, falseValue) {
  return undefined;
 }

+function parseQuality(quality?: number) {
+  if (typeof quality === 'number') {
+    return (new BigNumber(quality)).shift(-9).toNumber();
+  }
+  return undefined;
+}
+
 function parseTrustline(tx: Object): Object {
  assert(tx.TransactionType === 'TrustSet');

@@ -21,8 +29,8 @@ function parseTrustline(tx: Object): Object {
    limit: tx.LimitAmount.value,
    currency: tx.LimitAmount.currency,
    counterparty: tx.LimitAmount.issuer,
-    qualityIn: tx.QualityIn,
-    qualityOut: tx.QualityOut,
+    qualityIn: parseQuality(tx.QualityIn),
+    qualityOut: parseQuality(tx.QualityOut),
    ripplingDisabled: parseFlag(
      tx.Flags, flags.SetNoRipple, flags.ClearNoRipple),
    frozen: parseFlag(tx.Flags, flags.SetFreeze, flags.ClearFreeze),
--- a/src/api/ledger/parse/utils.js
+++ b/src/api/ledger/parse/utils.js
@@ -6,8 +6,9 @@ const toTimestamp = require('../../../core/utils').toTimestamp;
 const utils = require('../utils');
 const BigNumber = require('bignumber.js');

-function adjustQualityForXRP(quality: string, takerGetsCurrency: string,
-    takerPaysCurrency: string) {
+function adjustQualityForXRP(
+  quality: string, takerGetsCurrency: string, takerPaysCurrency: string
+) {
  // quality = takerPays.value/takerGets.value
  // using drops (1e-6 XRP) for XRP values
  const numeratorShift = (takerPaysCurrency === 'XRP' ? -6 : 0);
@@ -51,7 +52,7 @@ function parseOutcome(tx: Object): ?Object {
  }

  const balanceChanges = transactionParser.parseBalanceChanges(tx.meta);
-  const orderbookChanges = transactionParser.parseOrderBookChanges(tx.meta);
+  const orderbookChanges = transactionParser.parseOrderbookChanges(tx.meta);
  removeEmptyCounterpartyInBalanceChanges(balanceChanges);
  removeEmptyCounterpartyInOrderbookChanges(orderbookChanges);

@@ -66,8 +67,22 @@ function parseOutcome(tx: Object): ?Object {
  };
 }

+function parseMemos(tx: Object): ?Array<Object> {
+  if (!Array.isArray(tx.Memos) || tx.Memos.length === 0) {
+    return undefined;
+  }
+  return tx.Memos.map((m) => {
+    return removeUndefined({
+      type: m.Memo.parsed_memo_type,
+      format: m.Memo.parsed_memo_format,
+      data: m.Memo.parsed_memo_data
+    });
+  });
+}
+
 module.exports = {
  parseOutcome,
+  parseMemos,
  removeUndefined,
  adjustQualityForXRP,
  dropsToXrp: utils.common.dropsToXrp,
--- a/src/api/ledger/pathfind.js
+++ b/src/api/ledger/pathfind.js
@@ -8,6 +8,7 @@ const validate = utils.common.validate;
 const parsePathfind = require('./parse/pathfind');
 const NotFoundError = utils.common.errors.NotFoundError;
 const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;

 type PathFindParams = {
  src_currencies?: Array<string>, src_account: string, dst_amount: string,
@@ -46,8 +47,8 @@ function requestPathFind(remote, pathfind: PathFind, callback) {
      _.omit(utils.common.toRippledAmount(amount), 'value'));
  }

-  remote.requestRipplePathFind(params,
-    composeAsync(_.partial(addParams, params), callback));
+  remote.createPathFind(params,
+    composeAsync(_.partial(addParams, params), convertErrors(callback)));
 }

 function addDirectXrpPath(paths, xrpBalance) {
@@ -83,7 +84,8 @@ function formatResponse(pathfind, paths) {
    const address = pathfind.source.address;
    return parsePathfind(address, pathfind.destination.amount, paths);
  }
-  if (!_.includes(paths.destination_currencies,
+  if (paths.destination_currencies !== undefined &&
+      !_.includes(paths.destination_currencies,
      pathfind.destination.amount.currency)) {
    throw new NotFoundError('No paths found. ' +
      'The destination_account does not accept ' +
@@ -103,7 +105,7 @@ function formatResponse(pathfind, paths) {
  }
 }

-function getPaths(pathfind, callback) {
+function getPathsAsync(pathfind, callback) {
  validate.pathfind(pathfind);

  const address = pathfind.source.address;
@@ -113,4 +115,8 @@ function getPaths(pathfind, callback) {
  ], composeAsync(_.partial(formatResponse, pathfind), callback));
 }

-module.exports = utils.wrapCatch(getPaths);
+function getPaths(pathfind: Object) {
+  return utils.promisify(getPathsAsync).call(this, pathfind);
+}
+
+module.exports = getPaths;
--- a/src/api/ledger/settings.js
+++ b/src/api/ledger/settings.js
@@ -6,6 +6,7 @@ const validate = utils.common.validate;
 const parseFields = require('./parse/fields');
 const composeAsync = utils.common.composeAsync;
 const AccountFlags = utils.common.constants.AccountFlags;
+const convertErrors = utils.common.convertErrors;

 function parseFlags(value) {
  const settings = {};
@@ -24,17 +25,21 @@ function formatSettings(response) {
  return _.assign({}, parsedFlags, parsedFields);
 }

-function getSettings(account, options, callback) {
+function getSettingsAsync(account, options, callback) {
  validate.address(account);
  validate.getSettingsOptions(options);

  const request = {
    account: account,
-    ledger: options.ledgerVersion
+    ledger: options.ledgerVersion || 'validated'
  };

  this.remote.requestAccountInfo(request,
-    composeAsync(formatSettings, callback));
+    composeAsync(formatSettings, convertErrors(callback)));
 }

-module.exports = utils.wrapCatch(getSettings);
+function getSettings(account: string, options = {}) {
+  return utils.promisify(getSettingsAsync).call(this, account, options);
+}
+
+module.exports = getSettings;
--- a/src/api/ledger/transaction-types.js
+++ b/src/api/ledger/transaction-types.js
@@ -0,0 +1,147 @@
+/* @flow */
+'use strict';
+
+type Outcome = {
+  result: string,
+  timestamp?: string,
+  fee: string,
+  balanceChanges: Object,
+  orderbookChanges: Object,
+  ledgerVersion: number,
+  indexInLedger: number
+}
+
+type Adjustment = {
+  address: string,
+  amount: {
+   currency: string,
+   counterparty?: string,
+   value: string
+ },
+  tag?: number
+}
+
+type Trustline = {
+  currency: string,
+  counterparty: string,
+  limit: string,
+  qualityIn?: number,
+  qualityOut?: number,
+  ripplingDisabled?: boolean,
+  authorized?: boolean,
+  frozen?: boolean
+}
+
+type Settings = {
+  passwordSpent?: boolean,
+  requireDestinationTag?: boolean,
+  requireAuthorization?: boolean,
+  disallowIncomingXRP?: boolean,
+  disableMasterKey?: boolean,
+  enableTransactionIDTracking?: boolean,
+  noFreeze?: boolean,
+  globalFreeze?: boolean,
+  defaultRipple?: boolean,
+  emailHash?: string,
+  walletLocator?: string,
+  walletSize?: number,
+  messageKey?: string,
+  domain?: string,
+  transferRate?: number,
+  signers?: string,
+  regularKey?: string
+}
+
+type OrderCancellation = {
+  orderSequence: number
+}
+
+type Memo = {
+  type?: string,
+  format?: string,
+  data?: string
+}
+
+type Amount = {
+  value: string,
+  currency: string,
+  counterparty?: string
+}
+
+type Payment = {
+  source: Adjustment,
+  destination: Adjustment,
+  paths?: string,
+  memos?: Array<Memo>,
+  invoiceID?: string,
+  allowPartialPayment?: boolean,
+  noDirectRipple?: boolean,
+  limitQuality?: boolean
+}
+
+type PaymentTransaction = {
+  type: string,
+  specification: Payment,
+  outcome: Outcome,
+  id: string,
+  address: string,
+  sequence: number
+}
+
+type Order = {
+  direction: string,
+  quantity: Amount,
+  totalPrice: Amount,
+  immediateOrCancel?: boolean,
+  fillOrKill?: boolean,
+  passive?: boolean
+}
+
+type OrderTransaction = {
+  type: string,
+  specification: Order,
+  outcome: Outcome,
+  id: string,
+  address: string,
+  sequence: number
+}
+
+type OrderCancellationTransaction = {
+  type: string,
+  specification: OrderCancellation,
+  outcome: Outcome,
+  id: string,
+  address: string,
+  sequence: number
+}
+
+type TrustlineTransaction = {
+  type: string,
+  specification: Trustline,
+  outcome: Outcome,
+  id: string,
+  address: string,
+  sequence: number
+}
+
+type SettingsTransaction = {
+  type: string,
+  specification: Settings,
+  outcome: Outcome,
+  id: string,
+  address: string,
+  sequence: number
+}
+
+export type TransactionOptions = {
+  minLedgerVersion?: number,
+  maxLedgerVersion?: number
+}
+
+export type GetTransactionResponse = PaymentTransaction | OrderTransaction |
+  OrderCancellationTransaction | TrustlineTransaction | SettingsTransaction
+
+export type GetTransactionResponseCallback =
+  (err?: ?Error, data?: GetTransactionResponse) => void
+
+export type CallbackType = (err?: ?Error, data?: Object) => void
--- a/src/api/ledger/transaction.js
+++ b/src/api/ledger/transaction.js
@@ -6,8 +6,18 @@ const utils = require('./utils');
 const parseTransaction = require('./parse/transaction');
 const validate = utils.common.validate;
 const errors = utils.common.errors;
+const convertErrors = utils.common.convertErrors;
+const RippleError = require('../../core/rippleerror').RippleError;

-function attachTransactionDate(remote, tx, callback) {
+import type {Remote} from '../../core/remote';
+
+import type {CallbackType, GetTransactionResponse,
+  GetTransactionResponseCallback, TransactionOptions}
+  from './transaction-types';
+
+function attachTransactionDate(remote: Remote, tx: Object,
+                              callback: CallbackType
+) {
  if (tx.date) {
    callback(null, tx);
    return;
@@ -28,40 +38,68 @@ function attachTransactionDate(remote, tx, callback) {
  });
 }

-function isTransactionInRange(tx, options) {
+function isTransactionInRange(tx: Object, options: TransactionOptions) {
  return (!options.minLedgerVersion
          || tx.ledger_index >= options.minLedgerVersion)
      && (!options.maxLedgerVersion
          || tx.ledger_index <= options.maxLedgerVersion);
 }

-function getTransaction(identifier, options, callback) {
+function getTransactionAsync(identifier: string, options: TransactionOptions,
+                             callback: GetTransactionResponseCallback
+) {
  validate.identifier(identifier);
  validate.getTransactionOptions(options);

  const remote = this.remote;
-  const maxLedgerVersion = Math.min(options.maxLedgerVersion,
-    remote.getLedgerSequence());
+  const maxLedgerVersion =
+    options.maxLedgerVersion || remote.getLedgerSequence();

-  function callbackWrapper(error, tx) {
+  function callbackWrapper(error_?: Error, tx?: Object) {
+    let error = error_;
+
+    if (!error && tx && tx.validated !== true) {
+      return callback(new errors.NotFoundError('Transaction not found'));
+    }
+
+    if (error instanceof RippleError && error.remote &&
+      error.remote.error === 'txnNotFound') {
+      error = new errors.NotFoundError('Transaction not found');
+    }
+
+    // Missing complete ledger range
    if (error instanceof errors.NotFoundError
-        && !utils.hasCompleteLedgerRange(remote,
-            options.minLedgerVersion, maxLedgerVersion)) {
-      callback(new errors.MissingLedgerHistoryError('Transaction not found,'
-        + ' but the server\'s ledger history is incomplete'));
-    } else if (!error && !isTransactionInRange(tx, options)) {
+        && !utils.hasCompleteLedgerRange(remote, options.minLedgerVersion,
+                                         maxLedgerVersion)) {
+      if (utils.isPendingLedgerVersion(remote, maxLedgerVersion)) {
+        callback(new errors.PendingLedgerVersionError());
+      } else {
+        callback(new errors.MissingLedgerHistoryError());
+      }
+      // Transaction is found, but not in specified range
+    } else if (!error && tx && !isTransactionInRange(tx, options)) {
      callback(new errors.NotFoundError('Transaction not found'));
+      // Transaction is not found
    } else if (error) {
-      callback(error);
+      convertErrors(callback)(error);
+    } else if (!tx) {
+      callback(new errors.ApiError('Internal error'));
    } else {
      callback(error, parseTransaction(tx));
    }
  }

  async.waterfall([
-    _.partial(remote.requestTx.bind(remote), {hash: identifier, binary: false}),
+    _.partial(remote.requestTx.bind(remote),
+      {hash: identifier, binary: false}),
    _.partial(attachTransactionDate, remote)
  ], callbackWrapper);
 }

-module.exports = utils.wrapCatch(getTransaction);
+function getTransaction(identifier: string,
+                        options: TransactionOptions = {}
+): Promise<GetTransactionResponse> {
+  return utils.promisify(getTransactionAsync).call(this, identifier, options);
+}
+
+module.exports = getTransaction;
--- a/src/api/ledger/transactions.js
+++ b/src/api/ledger/transactions.js
@@ -1,4 +1,5 @@
 /* @flow */
+/* eslint-disable max-params */
 'use strict';
 const _ = require('lodash');
 const utils = require('./utils');
@@ -6,6 +7,7 @@ const parseTransaction = require('./parse/transaction');
 const getTransaction = require('./transaction');
 const validate = utils.common.validate;
 const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;

 function parseAccountTxTransaction(tx) {
  // rippled uses a different response format for 'account_tx' than 'tx'
@@ -14,6 +16,21 @@ function parseAccountTxTransaction(tx) {
  return parseTransaction(tx.tx);
 }

+function counterpartyFilter(filters, tx) {
+  if (!filters.counterparty) {
+    return true;
+  }
+  if (tx.address === filters.counterparty || (
+    tx.specification && (
+      (tx.specification.destination &&
+        tx.specification.destination.address === filters.counterparty) ||
+      (tx.specification.counterparty === filters.counterparty)
+    ))) {
+    return true;
+  }
+  return false;
+}
+
 function transactionFilter(address, filters, tx) {
  if (filters.excludeFailures && tx.outcome.result !== 'tesSUCCESS') {
    return false;
@@ -27,8 +44,7 @@ function transactionFilter(address, filters, tx) {
  if (filters.initiated === false && tx.address === address) {
    return false;
  }
-  if (filters.counterparty && tx.address !== filters.counterparty
-      && tx.Destination !== filters.counterparty) {
+  if (filters.counterparty && !counterpartyFilter(filters, tx)) {
    return false;
  }
  return true;
@@ -40,27 +56,31 @@ function orderFilter(options, tx) {
    utils.compareTransactions(tx, options.startTx) < 0);
 }

+function formatPartialResponse(address, options, data) {
+  return {
+    marker: data.marker,
+    results: data.transactions
+      .filter((tx) => tx.validated)
+      .map(parseAccountTxTransaction)
+      .filter(_.partial(transactionFilter, address, options))
+      .filter(_.partial(orderFilter, options))
+  };
+}
+
 function getAccountTx(remote, address, options, marker, limit, callback) {
  const params = {
    account: address,
    ledger_index_min: options.minLedgerVersion || -1,
-    ledger_index_max: options.maxLedgerVersion || -1,
+    ledger_index_max: options.maxLedgerVersion || remote.getLedgerSequence(),
    forward: options.earliestFirst,
    binary: options.binary,
    limit: utils.clamp(limit, 10, 400),
    marker: marker
  };

-  remote.requestAccountTx(params, (error, data) => {
-    return error ? callback(error) : callback(null, {
-      marker: data.marker,
-      results: data.transactions
-        .filter((tx) => tx.validated)
-        .map(parseAccountTxTransaction)
-        .filter(_.partial(transactionFilter, address, options))
-        .filter(_.partial(orderFilter, options))
-    });
-  });
+  remote.requestAccountTx(params,
+    composeAsync(_.partial(formatPartialResponse, address, options),
+      convertErrors(callback)));
 }

 function checkForLedgerGaps(remote, options, transactions) {
@@ -97,27 +117,27 @@ function getTransactionsInternal(remote, address, options, callback) {
  utils.getRecursive(getter, options.limit, composeAsync(format, callback));
 }

-function getTransactions(address, options, callback) {
-  validate.address(address);
+function getTransactionsAsync(account, options, callback) {
+  validate.address(account);
  validate.getTransactionsOptions(options);

  const defaults = {maxLedgerVersion: this.remote.getLedgerSequence()};
  if (options.start) {
-    getTransaction.bind(this)(options.start, {}, (error, tx) => {
-      if (error) {
-        callback(error);
-        return;
-      }
+    getTransaction.call(this, options.start).then(tx => {
      const ledgerVersion = tx.outcome.ledgerVersion;
      const bound = options.earliestFirst ?
        {minLedgerVersion: ledgerVersion} : {maxLedgerVersion: ledgerVersion};
      const newOptions = _.assign(defaults, options, {startTx: tx}, bound);
-      getTransactionsInternal(this.remote, address, newOptions, callback);
-    });
+      getTransactionsInternal(this.remote, account, newOptions, callback);
+    }).catch(callback);
  } else {
    const newOptions = _.assign(defaults, options);
-    getTransactionsInternal(this.remote, address, newOptions, callback);
+    getTransactionsInternal(this.remote, account, newOptions, callback);
  }
 }

-module.exports = utils.wrapCatch(getTransactions);
+function getTransactions(account: string, options = {}) {
+  return utils.promisify(getTransactionsAsync).call(this, account, options);
+}
+
+module.exports = getTransactions;
--- a/src/api/ledger/trustlines.js
+++ b/src/api/ledger/trustlines.js
@@ -3,14 +3,25 @@
 const _ = require('lodash');
 const utils = require('./utils');
 const validate = utils.common.validate;
+const composeAsync = utils.common.composeAsync;
+const convertErrors = utils.common.convertErrors;
 const parseAccountTrustline = require('./parse/account-trustline');

 function currencyFilter(currency, trustline) {
  return currency === null || trustline.specification.currency === currency;
 }

+function formatResponse(options, data) {
+  return {
+    marker: data.marker,
+    results: data.lines.map(parseAccountTrustline)
+      .filter(_.partial(currencyFilter, options.currency || null))
+  };
+}
+
 function getAccountLines(remote, address, ledgerVersion, options, marker, limit,
-    callback) {
+    callback
+) {
  const requestOptions = {
    account: address,
    ledger: ledgerVersion,
@@ -19,19 +30,15 @@ function getAccountLines(remote, address, ledgerVersion, options, marker, limit,
    peer: options.counterparty
  };

-  remote.requestAccountLines(requestOptions, (error, data) => {
-    return error ? callback(error) :
-      callback(null, {
-        marker: data.marker,
-        results: data.lines.map(parseAccountTrustline)
-          .filter(_.partial(currencyFilter, options.currency || null))
-      });
-  });
+  remote.requestAccountLines(requestOptions,
+    composeAsync(_.partial(formatResponse, options),
+      convertErrors(callback)));
 }

-function getTrustlines(account: string, options: {currency: string,
+function getTrustlinesAsync(account: string, options: {currency: string,
    counterparty: string, limit: number, ledgerVersion: number},
-    callback: () => void): void {
+    callback: () => void
+): void {
  validate.address(account);
  validate.getTrustlinesOptions(options);

@@ -42,4 +49,8 @@ function getTrustlines(account: string, options: {currency: string,
  utils.getRecursive(getter, options.limit, callback);
 }

-module.exports = utils.wrapCatch(getTrustlines);
+function getTrustlines(account: string, options = {}) {
+  return utils.promisify(getTrustlinesAsync).call(this, account, options);
+}
+
+module.exports = getTrustlines;
--- a/src/api/ledger/utils.js
+++ b/src/api/ledger/utils.js
@@ -1,23 +1,33 @@
+/* @flow */
 'use strict';
 const _ = require('lodash');
 const assert = require('assert');
 const common = require('../common');
 const dropsToXrp = common.dropsToXrp;
 const composeAsync = common.composeAsync;
+import type {Remote} from '../../core/remote';

-function clamp(value, min, max) {
+type Callback = (err: any, data: any) => void
+
+function clamp(value: number, min: number, max: number): number {
  assert(min <= max, 'Illegal clamp bounds');
  return Math.min(Math.max(value, min), max);
 }

-function getXRPBalance(remote, address, ledgerVersion, callback) {
+function getXRPBalance(remote: Remote, address: string, ledgerVersion?: number,
+                       callback: Callback
+): void {
  remote.requestAccountInfo({account: address, ledger: ledgerVersion},
    composeAsync((data) => dropsToXrp(data.account_data.Balance), callback));
 }

+type Getter = (marker: ?string, limit: number, callback: Callback) => void
+
 // If the marker is omitted from a response, you have reached the end
 // getter(marker, limit, callback), callback(error, {marker, results})
-function getRecursiveRecur(getter, marker, limit, callback) {
+function getRecursiveRecur(getter: Getter, marker?: string, limit: number,
+                          callback: Callback
+): void {
  getter(marker, limit, (error, data) => {
    if (error) {
      return callback(error);
@@ -34,11 +44,13 @@ function getRecursiveRecur(getter, marker, limit, callback) {
  });
 }

-function getRecursive(getter, limit, callback) {
+function getRecursive(getter: Getter, limit?: number, callback: Callback) {
  getRecursiveRecur(getter, undefined, limit || Infinity, callback);
 }

-function renameCounterpartyToIssuer(amount) {
+type Amount = {counterparty?: string, issuer?: string, value: string}
+
+function renameCounterpartyToIssuer(amount?: Amount): ?{issuer?: string} {
  if (amount === undefined) {
    return undefined;
  }
@@ -48,7 +60,9 @@ function renameCounterpartyToIssuer(amount) {
  return _.omit(withIssuer, 'counterparty');
 }

-function renameCounterpartyToIssuerInOrder(order) {
+type Order = {taker_gets: Amount, taker_pays: Amount}
+
+function renameCounterpartyToIssuerInOrder(order: Order) {
  const taker_gets = renameCounterpartyToIssuer(order.taker_gets);
  const taker_pays = renameCounterpartyToIssuer(order.taker_pays);
  const changes = {taker_gets: taker_gets, taker_pays: taker_pays};
@@ -70,20 +84,34 @@ function signum(num) {
 *  @returns {Number} [-1, 0, 1]
 */

-function compareTransactions(first, second) {
-  if (first.ledgerVersion === second.ledgerVersion) {
-    return signum(Number(first.indexInLedger) - Number(second.indexInLedger));
+type Outcome = {outcome: {ledgerVersion: number, indexInLedger: number}};
+
+function compareTransactions(first: Outcome, second: Outcome): number {
+  if (!first.outcome || !second.outcome) {
+    return 0;
  }
-  return Number(first.ledgerVersion) < Number(second.ledgerVersion) ? -1 : 1;
+  if (first.outcome.ledgerVersion === second.outcome.ledgerVersion) {
+    return signum(first.outcome.indexInLedger - second.outcome.indexInLedger);
+  }
+  return first.outcome.ledgerVersion < second.outcome.ledgerVersion ? -1 : 1;
 }

-function hasCompleteLedgerRange(remote, minLedgerVersion, maxLedgerVersion) {
+function hasCompleteLedgerRange(remote: Remote, minLedgerVersion?: number,
+                                maxLedgerVersion?: number
+): boolean {
+
  const firstLedgerVersion = 32570; // earlier versions have been lost
  return remote.getServer().hasLedgerRange(
    minLedgerVersion || firstLedgerVersion,
    maxLedgerVersion || remote.getLedgerSequence());
 }

+function isPendingLedgerVersion(remote: Remote, maxLedgerVersion: ?number
+): boolean {
+  const currentLedger = remote.getLedgerSequence();
+  return currentLedger < (maxLedgerVersion || 0);
+}
+
 module.exports = {
  getXRPBalance,
  compareTransactions,
@@ -91,7 +119,8 @@ module.exports = {
  renameCounterpartyToIssuerInOrder,
  getRecursive,
  hasCompleteLedgerRange,
-  wrapCatch: common.wrapCatch,
+  isPendingLedgerVersion,
+  promisify: common.promisify,
  clamp: clamp,
  common: common
 };
--- a/src/api/offline/ledgerhash.js
+++ b/src/api/offline/ledgerhash.js
@@ -0,0 +1,74 @@
+/* @flow */
+'use strict';
+const _ = require('lodash');
+const common = require('../common');
+
+function convertLedgerHeader(header) {
+  return {
+    accepted: header.accepted,
+    closed: header.closed,
+    account_hash: header.stateHash,
+    close_time: header.closeTime,
+    close_time_resolution: header.closeTimeResolution,
+    close_flags: header.closeFlags,
+    hash: header.ledgerHash,
+    ledger_hash: header.ledgerHash,
+    ledger_index: header.ledgerVersion.toString(),
+    seqNum: header.ledgerVersion.toString(),
+    parent_hash: header.parentLedgerHash,
+    parent_close_time: header.parentCloseTime,
+    total_coins: header.totalDrops,
+    totalCoins: header.totalDrops,
+    transaction_hash: header.transactionHash
+  };
+}
+
+function hashLedgerHeader(ledgerHeader) {
+  const header = convertLedgerHeader(ledgerHeader);
+  return common.core.Ledger.calculateLedgerHash(header);
+}
+
+function computeTransactionHash(ledger) {
+  if (ledger.rawTransactions === undefined) {
+    return ledger.transactionHash;
+  }
+  const transactions = JSON.parse(ledger.rawTransactions);
+  const txs = _.map(transactions, tx => {
+    const mergeTx = _.assign({}, _.omit(tx, 'tx'), tx.tx || {});
+    const renameMeta = _.assign({}, _.omit(mergeTx, 'meta'),
+      tx.meta ? {metaData: tx.meta} : {});
+    return renameMeta;
+  });
+  const ledgerObject = common.core.Ledger.from_json({transactions: txs});
+  const transactionHash = ledgerObject.calc_tx_hash().to_hex();
+  if (ledger.transactionHash !== undefined
+      && ledger.transactionHash !== transactionHash) {
+    throw new common.errors.ValidationError('transactionHash in header'
+      + ' does not match computed hash of transactions');
+  }
+  return transactionHash;
+}
+
+function computeStateHash(ledger) {
+  if (ledger.rawState === undefined) {
+    return ledger.stateHash;
+  }
+  const state = JSON.parse(ledger.rawState);
+  const ledgerObject = common.core.Ledger.from_json({accountState: state});
+  const stateHash = ledgerObject.calc_account_hash().to_hex();
+  if (ledger.stateHash !== undefined && ledger.stateHash !== stateHash) {
+    throw new common.errors.ValidationError('stateHash in header'
+      + ' does not match computed hash of state');
+  }
+  return stateHash;
+}
+
+function computeLedgerHash(ledger: Object): string {
+  const hashes = {
+    transactionHash: computeTransactionHash(ledger),
+    stateHash: computeStateHash(ledger)
+  };
+  return hashLedgerHeader(_.assign({}, ledger, hashes));
+}
+
+module.exports = computeLedgerHash;
--- a/src/api/server/server.js
+++ b/src/api/server/server.js
@@ -2,20 +2,43 @@

 'use strict';

+const _ = require('lodash');
 const common = require('../common');
+import type {Remote} from '../../core/remote';

 // If a ledger is not received in this time, consider the connection offline
 const CONNECTION_TIMEOUT = 1000 * 30;

-function connect(callback: (err: any, data: any) => void): void {
-  this.remote.connect(callback);
+type GetServerInfoResponse = {
+  buildVersion: string,
+  completeLedgers: string,
+  hostid: string,
+  ioLatencyMs: number,
+  load?: {
+    jobTypes: Array<Object>,
+    threads: number
+  },
+  lastClose: {
+    convergeTimeS: number,
+    proposers: number
+  },
+  loadFactor: number,
+  peers: number,
+  pubkeyNode: string,
+  pubkeyValidator?: string,
+  serverState: string,
+  validatedLedger: {
+    age: number,
+    baseFeeXrp: number,
+    hash: string,
+    reserveBaseXrp: number,
+    reserveIncXrp: number,
+    seq: number
+  },
+  validationQuorum: number
 }

-function disconnect(callback: (err: any, data: any) => void): void {
-  this.remote.disconnect(callback);
-}
-
-function isUpToDate(remote): boolean {
+function isUpToDate(remote: Remote): boolean {
  const server = remote.getServer();
  return Boolean(server) && (remote._stand_alone
    || (Date.now() - server._lastLedgerClose) <= CONNECTION_TIMEOUT);
@@ -25,12 +48,17 @@ function isConnected(): boolean {
  return Boolean(this.remote._ledger_current_index) && isUpToDate(this.remote);
 }

-function getServerInfo(callback: (err: any, data: any) => void): void {
+function getServerInfoAsync(
+  callback: (err: any, data?: GetServerInfoResponse) => void
+): void {
  this.remote.requestServerInfo((error, response) => {
    if (error) {
-      callback(new common.errors.RippledNetworkError(error.message));
+      const message =
+        _.get(error, ['remote', 'error_message'], error.message);
+      callback(new common.errors.RippledNetworkError(message));
    } else {
-      callback(null, response.info);
+      callback(null,
+        common.convertKeysFromSnakeCaseToCamelCase(response.info));
    }
  });
 }
@@ -43,11 +71,46 @@ function getLedgerVersion(): number {
  return this.remote.getLedgerSequence();
 }

+function connect(): Promise<void> {
+  return common.promisify(callback => {
+    this.remote.connect(() => callback(null));
+  })();
+}
+
+function disconnect(): Promise<void> {
+  return common.promisify(callback => {
+    this.remote.disconnect(() => callback(null));
+  })();
+}
+
+function getServerInfo(): Promise<GetServerInfoResponse> {
+  return common.promisify(getServerInfoAsync.bind(this))();
+}
+
+function rippleTimeToISO8601(rippleTime: string): string {
+  return new Date(common.core.utils.toTimestamp(rippleTime)).toISOString();
+}
+
+function formatLedgerClose(ledgerClose: Object): Object {
+  return {
+    feeBase: ledgerClose.fee_base,
+    feeReference: ledgerClose.fee_ref,
+    ledgerHash: ledgerClose.ledger_hash,
+    ledgerVersion: ledgerClose.ledger_index,
+    ledgerTimestamp: rippleTimeToISO8601(ledgerClose.ledger_time),
+    reserveBase: ledgerClose.reserve_base,
+    reserveIncrement: ledgerClose.reserve_inc,
+    transactionCount: ledgerClose.txn_count,
+    validatedLedgerVersions: ledgerClose.validated_ledgers
+  };
+}
+
 module.exports = {
  connect,
  disconnect,
  isConnected,
  getServerInfo,
  getFee,
-  getLedgerVersion
+  getLedgerVersion,
+  formatLedgerClose
 };
--- a/src/api/transaction/order.js
+++ b/src/api/transaction/order.js
@@ -30,9 +30,14 @@ function createOrderTransaction(account, order) {
  return transaction;
 }

-function prepareOrder(account, order, instructions, callback) {
+function prepareOrderAsync(account, order, instructions, callback) {
  const transaction = createOrderTransaction(account, order);
-  utils.createTxJSON(transaction, this.remote, instructions, callback);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
 }

-module.exports = utils.wrapCatch(prepareOrder);
+function prepareOrder(account: string, order: Object, instructions = {}) {
+  return utils.promisify(prepareOrderAsync.bind(this))(
+    account, order, instructions);
+}
+
+module.exports = prepareOrder;
--- a/src/api/transaction/ordercancellation.js
+++ b/src/api/transaction/ordercancellation.js
@@ -13,9 +13,18 @@ function createOrderCancellationTransaction(account, sequence) {
  return transaction;
 }

-function prepareOrderCancellation(account, sequence, instructions, callback) {
+function prepareOrderCancellationAsync(account, sequence, instructions,
+  callback
+) {
  const transaction = createOrderCancellationTransaction(account, sequence);
-  utils.createTxJSON(transaction, this.remote, instructions, callback);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
 }

-module.exports = utils.wrapCatch(prepareOrderCancellation);
+function prepareOrderCancellation(account: string, sequence: number,
+    instructions = {}
+) {
+  return utils.promisify(prepareOrderCancellationAsync.bind(this))(
+    account, sequence, instructions);
+}
+
+module.exports = prepareOrderCancellation;
--- a/src/api/transaction/payment.js
+++ b/src/api/transaction/payment.js
@@ -1,21 +1,15 @@
 /* @flow */
 'use strict';
 const _ = require('lodash');
-const BigNumber = require('bignumber.js');
 const utils = require('./utils');
 const validate = utils.common.validate;
 const toRippledAmount = utils.common.toRippledAmount;
 const Transaction = utils.common.core.Transaction;

-function isSendMaxAllowed(payment) {
-  const srcAmt = payment.source.amount;
-  const dstAmt = payment.destination.amount;
-
-  // Don't set SendMax for XRP->XRP payment
-  // temREDUNDANT_SEND_MAX removed in:
-  // https://github.com/ripple/rippled/commit/
-  //  c522ffa6db2648f1d8a987843e7feabf1a0b7de8/
-  return srcAmt && !(srcAmt.currency === 'XRP' && dstAmt.currency === 'XRP');
+function isXRPToXRPPayment(payment) {
+  const sourceCurrency = _.get(payment, 'source.maxAmount.currency');
+  const destinationCurrency = _.get(payment, 'destination.amount.currency');
+  return sourceCurrency === 'XRP' && destinationCurrency === 'XRP';
 }

 function isIOUWithoutCounterparty(amount) {
@@ -29,8 +23,8 @@ function applyAnyCounterpartyEncoding(payment) {
  // https://ripple.com/build/transactions/
  //    #special-issuer-values-for-sendmax-and-amount
  // https://ripple.com/build/ripple-rest/#counterparties-in-payments
-  if (isIOUWithoutCounterparty(payment.source.amount)) {
-    payment.source.amount.counterparty = payment.source.address;
+  if (isIOUWithoutCounterparty(payment.source.maxAmount)) {
+    payment.source.maxAmount.counterparty = payment.source.address;
  }
  if (isIOUWithoutCounterparty(payment.destination.amount)) {
    payment.destination.amount.counterparty = payment.destination.address;
@@ -58,9 +52,6 @@ function createPaymentTransaction(account, payment) {
  if (payment.destination.tag) {
    transaction.destinationTag(payment.destination.tag);
  }
-  if (payment.paths) {
-    transaction.paths(JSON.parse(payment.paths));
-  }
  if (payment.memos) {
    _.forEach(payment.memos, memo =>
      transaction.addMemo(memo.type, memo.format, memo.data)
@@ -75,19 +66,29 @@ function createPaymentTransaction(account, payment) {
  if (payment.limitQuality) {
    transaction.setFlags(['LimitQuality']);
  }
-  if (isSendMaxAllowed(payment)) {
-    const maxValue = new BigNumber(payment.source.amount.value)
-      .plus(payment.source.slippage || 0).toString();
-    const maxAmount = _.assign({}, payment.source.amount, {value: maxValue});
-    transaction.sendMax(toRippledAmount(maxAmount));
+  if (!isXRPToXRPPayment(payment)) {
+    // Don't set SendMax for XRP->XRP payment
+    // temREDUNDANT_SEND_MAX removed in:
+    // https://github.com/ripple/rippled/commit/
+    //  c522ffa6db2648f1d8a987843e7feabf1a0b7de8/
+    transaction.sendMax(toRippledAmount(payment.source.maxAmount));
+
+    if (payment.paths) {
+      transaction.paths(JSON.parse(payment.paths));
+    }
  }

  return transaction;
 }

-function preparePayment(account, payment, instructions, callback) {
+function preparePaymentAsync(account, payment, instructions, callback) {
  const transaction = createPaymentTransaction(account, payment);
-  utils.createTxJSON(transaction, this.remote, instructions, callback);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
 }

-module.exports = utils.wrapCatch(preparePayment);
+function preparePayment(account: string, payment: Object, instructions = {}) {
+  return utils.promisify(preparePaymentAsync.bind(this))(
+    account, payment, instructions);
+}
+
+module.exports = preparePayment;
--- a/src/api/transaction/settings.js
+++ b/src/api/transaction/settings.js
@@ -1,7 +1,7 @@
 /* @flow */
 'use strict';
-const _ = require('lodash');
 const assert = require('assert');
+const BigNumber = require('bignumber.js');
 const utils = require('./utils');
 const validate = utils.common.validate;
 const AccountFlagIndices = utils.common.constants.AccountFlagIndices;
@@ -9,7 +9,7 @@ const AccountFields = utils.common.constants.AccountFields;
 const Transaction = utils.common.core.Transaction;

 // Emptry string passed to setting will clear it
-const CLEAR_SETTING = '';
+const CLEAR_SETTING = null;

 function setTransactionFlags(transaction, values) {
  const keys = Object.keys(values);
@@ -64,7 +64,7 @@ function setTransactionFields(transaction, input) {
 */

 function convertTransferRate(transferRate) {
-  return _.isNumber(transferRate) ? transferRate * 1e9 : transferRate;
+  return (new BigNumber(transferRate)).shift(9).toNumber();
 }

 function createSettingsTransaction(account, settings) {
@@ -90,9 +90,14 @@ function createSettingsTransaction(account, settings) {
  return transaction;
 }

-function prepareSettings(account, settings, instructions, callback) {
+function prepareSettingsAsync(account, settings, instructions, callback) {
  const transaction = createSettingsTransaction(account, settings);
-  utils.createTxJSON(transaction, this.remote, instructions, callback);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
 }

-module.exports = utils.wrapCatch(prepareSettings);
+function prepareSettings(account: string, settings: Object, instructions = {}) {
+  return utils.promisify(prepareSettingsAsync.bind(this))(
+    account, settings, instructions);
+}
+
+module.exports = prepareSettings;
--- a/src/api/transaction/sign.js
+++ b/src/api/transaction/sign.js
@@ -15,15 +15,13 @@ const validate = utils.common.validate;
 * some arbitrary string. For example "TXN".
 */
 const HASH_TX_ID = 0x54584E00; // 'TXN'
-const HASH_TX_SIGN = 0x53545800; // 'STX'
-const HASH_TX_SIGN_TESTNET = 0x73747800; // 'stx'

-function getKeyPair(address, secret) {
-  return core.Seed.from_json(secret).get_key(address);
+function getKeyPair(secret) {
+  return core.Seed.from_json(secret).get_key();
 }

 function getPublicKeyHex(keypair) {
-  return keypair.to_hex_pub();
+  return keypair.pubKeyHex();
 }

 function serialize(txJSON) {
@@ -34,31 +32,26 @@ function hashSerialization(serialized, prefix) {
  return serialized.hash(prefix || HASH_TX_ID).to_hex();
 }

-function hashJSON(txJSON, prefix) {
-  return hashSerialization(serialize(txJSON), prefix);
-}
-
-function signingHash(txJSON, isTestNet=false) {
-  return hashJSON(txJSON, isTestNet ? HASH_TX_SIGN_TESTNET : HASH_TX_SIGN);
+function signingData(txJSON) {
+  return core.Transaction.from_json(txJSON).signingData().buffer;
 }

 function computeSignature(txJSON, keypair) {
-  const signature = keypair.sign(signingHash(txJSON));
-  return core.sjcl.codec.hex.fromBits(signature).toUpperCase();
+  return keypair.signHex(signingData(txJSON));
 }

-function sign(txJSON: {Account: string; SigningPubKey: string,
-    TxnSignature: string}, secret: string):
-    {signedTransaction: string; id: string} {
-  validate.txJSON(txJSON);
-  validate.addressAndSecret({address: txJSON.Account, secret: secret});
+function sign(txJSON: string, secret: string
+): {signedTransaction: string; id: string} {
+  const tx = JSON.parse(txJSON);
+  validate.txJSON(tx);
+  validate.secret(secret);

-  const keypair = getKeyPair(txJSON.Account, secret);
-  if (txJSON.SigningPubKey === undefined) {
-    txJSON.SigningPubKey = getPublicKeyHex(keypair);
+  const keypair = getKeyPair(secret);
+  if (tx.SigningPubKey === undefined) {
+    tx.SigningPubKey = getPublicKeyHex(keypair);
  }
-  txJSON.TxnSignature = computeSignature(txJSON, keypair);
-  const serialized = serialize(txJSON);
+  tx.TxnSignature = computeSignature(tx, keypair);
+  const serialized = serialize(tx);
  return {
    signedTransaction: serialized.to_hex(),
    id: hashSerialization(serialized, HASH_TX_ID)
--- a/src/api/transaction/submit.js
+++ b/src/api/transaction/submit.js
@@ -1,15 +1,44 @@
 /* @flow */
 'use strict';
+const _ = require('lodash');
 const utils = require('./utils');
 const validate = utils.common.validate;
 const Request = utils.common.core.Request;
+const convertErrors = utils.common.convertErrors;

-function submit(tx_blob: string,
-    callback: (err: any, data: any) => void): void {
-  validate.blob(tx_blob);
+function isImmediateRejection(engineResult) {
+  // note: "tel" errors mean the local server refused to process the
+  // transaction *at that time*, but it could potentially buffer the
+  // transaction and then process it at a later time, for example
+  // if the required fee changes (this does not occur at the time of
+  // this writing, but it could change in the future)
+  // all other error classes can potentially result in transcation validation
+  return _.startsWith(engineResult, 'tem') || _.startsWith(engineResult, 'tej');
+}
+
+function convertSubmitErrors(callback) {
+  return function(error, data) {
+    if (isImmediateRejection(data.engineResult)) {
+      callback(new utils.common.errors.RippleError('Submit failed'), data);
+    } else {
+      callback(error, data);
+    }
+  };
+}
+
+function submitAsync(txBlob: string, callback: (err: any, data: any) => void
+): void {
+  validate.blob(txBlob);
  const request = new Request(this.remote, 'submit');
-  request.message.tx_blob = tx_blob;
-  request.request(null, callback);
+  request.message.tx_blob = txBlob;
+  request.request(null,
+    utils.common.composeAsync(
+      data => utils.common.convertKeysFromSnakeCaseToCamelCase(data),
+      convertSubmitErrors(convertErrors(callback))));
+}
+
+function submit(txBlob: string) {
+  return utils.promisify(submitAsync.bind(this))(txBlob);
 }

 module.exports = submit;
--- a/src/api/transaction/suspended-payment-cancellation.js
+++ b/src/api/transaction/suspended-payment-cancellation.js
@@ -0,0 +1,40 @@
+/* @flow */
+'use strict';
+const _ = require('lodash');
+const utils = require('./utils');
+const validate = utils.common.validate;
+const Transaction = utils.common.core.Transaction;
+
+function createSuspendedPaymentCancellationTransaction(account, payment) {
+  validate.address(account);
+  validate.suspendedPaymentCancellation(payment);
+
+  const transaction = new Transaction();
+  transaction.suspendedPaymentCancel({
+    account: account,
+    owner: payment.owner,
+    paymentSequence: payment.paymentSequence
+  });
+
+  if (payment.memos) {
+    _.forEach(payment.memos, memo =>
+      transaction.addMemo(memo.type, memo.format, memo.data)
+    );
+  }
+  return transaction;
+}
+
+function prepareSuspendedPaymentCancellationAsync(account, payment,
+instructions, callback) {
+  const transaction =
+    createSuspendedPaymentCancellationTransaction(account, payment);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
+}
+
+function prepareSuspendedPaymentCancellation(account: string, payment: Object,
+instructions = {}) {
+  return utils.promisify(prepareSuspendedPaymentCancellationAsync)
+    .call(this, account, payment, instructions);
+}
+
+module.exports = prepareSuspendedPaymentCancellation;
--- a/src/api/transaction/suspended-payment-creation.js
+++ b/src/api/transaction/suspended-payment-creation.js
@@ -0,0 +1,57 @@
+/* @flow */
+'use strict';
+const _ = require('lodash');
+const utils = require('./utils');
+const validate = utils.common.validate;
+const toRippledAmount = utils.common.toRippledAmount;
+const Transaction = utils.common.core.Transaction;
+
+function createSuspendedPaymentCreationTransaction(account, payment) {
+  validate.address(account);
+  validate.suspendedPaymentCreation(payment);
+
+  const transaction = new Transaction();
+  transaction.suspendedPaymentCreate({
+    account: account,
+    destination: payment.destination.address,
+    amount: toRippledAmount(payment.destination.amount)
+  });
+
+  if (payment.digest) {
+    transaction.setDigest(payment.digest);
+  }
+  if (payment.allowCancelAfter) {
+    transaction.setAllowCancelAfter(payment.allowCancelAfter);
+  }
+  if (payment.allowExecuteAfter) {
+    transaction.setAllowExecuteAfter(payment.allowExecuteAfter);
+  }
+
+  if (payment.source.tag) {
+    transaction.sourceTag(payment.source.tag);
+  }
+  if (payment.destination.tag) {
+    transaction.destinationTag(payment.destination.tag);
+  }
+  if (payment.memos) {
+    _.forEach(payment.memos, memo =>
+      transaction.addMemo(memo.type, memo.format, memo.data)
+    );
+  }
+  return transaction;
+}
+
+function prepareSuspendedPaymentCreationAsync(account, payment, instructions,
+callback) {
+  const transaction =
+    createSuspendedPaymentCreationTransaction(account, payment);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
+}
+
+function prepareSuspendedPaymentCreation(account: string, payment: Object,
+instructions = {}) {
+  return utils.promisify(prepareSuspendedPaymentCreationAsync)
+    .call(this, account, payment, instructions);
+}
+
+module.exports = prepareSuspendedPaymentCreation;
--- a/src/api/transaction/suspended-payment-execution.js
+++ b/src/api/transaction/suspended-payment-execution.js
@@ -0,0 +1,50 @@
+/* @flow */
+'use strict';
+const _ = require('lodash');
+const utils = require('./utils');
+const validate = utils.common.validate;
+const Transaction = utils.common.core.Transaction;
+
+function createSuspendedPaymentExecutionTransaction(account, payment) {
+  validate.address(account);
+  validate.suspendedPaymentExecution(payment);
+
+  const transaction = new Transaction();
+  transaction.suspendedPaymentFinish({
+    account: account,
+    owner: payment.owner,
+    paymentSequence: payment.paymentSequence
+  });
+
+  if (payment.method) {
+    transaction.setMethod(payment.method);
+  }
+  if (payment.digest) {
+    transaction.setDigest(payment.digest);
+  }
+  if (payment.proof) {
+    transaction.setProof(payment.proof);
+  }
+
+  if (payment.memos) {
+    _.forEach(payment.memos, memo =>
+      transaction.addMemo(memo.type, memo.format, memo.data)
+    );
+  }
+  return transaction;
+}
+
+function prepareSuspendedPaymentExecutionAsync(account, payment, instructions,
+callback) {
+  const transaction =
+    createSuspendedPaymentExecutionTransaction(account, payment);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
+}
+
+function prepareSuspendedPaymentExecution(account: string, payment: Object,
+instructions = {}) {
+  return utils.promisify(prepareSuspendedPaymentExecutionAsync)
+    .call(this, account, payment, instructions);
+}
+
+module.exports = prepareSuspendedPaymentExecution;
--- a/src/api/transaction/trustline.js
+++ b/src/api/transaction/trustline.js
@@ -3,13 +3,19 @@
 const utils = require('./utils');
 const validate = utils.common.validate;
 const Transaction = utils.common.core.Transaction;
+const BigNumber = require('bignumber.js');

 const TrustSetFlags = {
  authorized: {set: 'SetAuth'},
-  allowRippling: {set: 'ClearNoRipple', unset: 'NoRipple'},
+  ripplingDisabled: {set: 'NoRipple', unset: 'ClearNoRipple'},
  frozen: {set: 'SetFreeze', unset: 'ClearFreeze'}
 };

+function convertQuality(quality) {
+  return quality === undefined ? undefined :
+    (new BigNumber(quality)).shift(9).truncated().toNumber();
+}
+
 function createTrustlineTransaction(account, trustline) {
  validate.address(account);
  validate.trustline(trustline);
@@ -21,15 +27,21 @@ function createTrustlineTransaction(account, trustline) {
  };

  const transaction = new Transaction();
-  transaction.trustSet(account, limit,
-    trustline.qualityIn, trustline.qualityOut);
+  transaction.trustSet(account, limit, convertQuality(trustline.qualityIn),
+    convertQuality(trustline.qualityOut));
  utils.setTransactionBitFlags(transaction, trustline, TrustSetFlags);
  return transaction;
 }

-function prepareTrustline(account, trustline, instructions, callback) {
+function prepareTrustlineAsync(account, trustline, instructions, callback) {
  const transaction = createTrustlineTransaction(account, trustline);
-  utils.createTxJSON(transaction, this.remote, instructions, callback);
+  utils.prepareTransaction(transaction, this.remote, instructions, callback);
 }

-module.exports = utils.wrapCatch(prepareTrustline);
+function prepareTrustline(account: string, trustline: Object, instructions = {}
+) {
+  return utils.promisify(prepareTrustlineAsync.bind(this))(
+    account, trustline, instructions);
+}
+
+module.exports = prepareTrustline;
--- a/src/api/transaction/utils.js
+++ b/src/api/transaction/utils.js
@@ -1,10 +1,11 @@
 /* @flow */
 'use strict';
+const _ = require('lodash');
 const BigNumber = require('bignumber.js');
 const common = require('../common');

-function setTransactionBitFlags(transaction: any, values: any, flags: any):
-    void {
+function setTransactionBitFlags(transaction: any, values: any, flags: any
+): void {
  for (const flagName in flags) {
    const flagValue = values[flagName];
    const flagConversions = flags[flagName];
@@ -23,8 +24,22 @@ function getFeeDrops(remote) {
  return remote.feeTx(feeUnits).to_text();
 }

-function createTxJSON(transaction: any, remote: any, instructions: any,
-    callback: (err: ?(typeof Error), data: {tx_json: any}) => void): void {
+function formatPrepareResponse(txJSON) {
+  const instructions = {
+    fee: txJSON.Fee,
+    sequence: txJSON.Sequence,
+    maxLedgerVersion: txJSON.LastLedgerSequence
+  };
+  return {
+    txJSON: JSON.stringify(txJSON),
+    instructions: _.omit(instructions, _.isUndefined)
+  };
+}
+
+type Callback = (err: ?(typeof Error),
+                 data: {txJSON: string, instructions: any}) => void;
+function prepareTransaction(transaction: any, remote: any, instructions: any,
+    callback: Callback): void {
  common.validate.instructions(instructions);

  transaction.complete();
@@ -53,18 +68,18 @@ function createTxJSON(transaction: any, remote: any, instructions: any,

  if (instructions.sequence !== undefined) {
    txJSON.Sequence = parseInt(instructions.sequence, 10);
-    callback(null, txJSON);
+    callback(null, formatPrepareResponse(txJSON));
  } else {
    remote.findAccount(account).getNextSequence(function(error, sequence) {
      txJSON.Sequence = sequence;
-      callback(null, txJSON);
+      callback(error, formatPrepareResponse(txJSON));
    });
  }
 }

 module.exports = {
-  setTransactionBitFlags: setTransactionBitFlags,
-  createTxJSON: createTxJSON,
-  wrapCatch: common.wrapCatch,
-  common: common
+  setTransactionBitFlags,
+  prepareTransaction,
+  common,
+  promisify: common.promisify
 };
--- a/src/core/account.js
+++ b/src/core/account.js
@@ -12,13 +12,14 @@

 const _ = require('lodash');
 const async = require('async');
-const util = require('util');
 const extend = require('extend');
-const EventEmitter = require('events').EventEmitter;
-const UInt160 = require('./uint160').UInt160;
-const TransactionManager = require('./transactionmanager').TransactionManager;
-const sjcl = require('./utils').sjcl;
-const Base = require('./base').Base;
+const util = require('util');
+const {createAccountID} = require('ripple-keypairs');
+const {encodeAccountID} = require('ripple-address-codec');
+const {EventEmitter} = require('events');
+const {hexToArray} = require('./utils');
+const {TransactionManager} = require('./transactionmanager');
+const {UInt160} = require('./uint160');

 /**
 * @constructor Account
@@ -41,7 +42,7 @@ function Account(remote, account) {
  this._entry = { };

  function listenerAdded(type) {
-    if (~Account.subscribeEvents.indexOf(type)) {
+    if (_.includes(Account.subscribeEvents, type)) {
      if (!self._subs && self._remote._connected) {
        self._remote.requestSubscribe()
        .addAccount(self._account_id)
@@ -54,7 +55,7 @@ function Account(remote, account) {
  this.on('newListener', listenerAdded);

  function listenerRemoved(type) {
-    if (~Account.subscribeEvents.indexOf(type)) {
+    if (_.includes(Account.subscribeEvents, type)) {
      self._subs -= 1;
      if (!self._subs && self._remote._connected) {
        self._remote.requestUnsubscribe()
@@ -68,7 +69,7 @@ function Account(remote, account) {

  function attachAccount(request) {
    if (self._account.is_valid() && self._subs) {
-      request.add_account(self._account_id);
+      request.addAccount(self._account_id);
    }
  }

@@ -376,12 +377,7 @@ Account.prototype.publicKeyIsActive = function(public_key, callback) {
 Account._publicKeyToAddress = function(public_key) {
  // Based on functions in /src/js/ripple/keypair.js
  function hexToUInt160(publicKey) {
-    const bits = sjcl.codec.hex.toBits(publicKey);
-    const hash = sjcl.hash.ripemd160.hash(sjcl.hash.sha256.hash(bits));
-    const address = UInt160.from_bits(hash);
-    address.set_version(Base.VER_ACCOUNT_ID);
-
-    return address.to_json();
+    return encodeAccountID(createAccountID(hexToArray(publicKey)));
  }

  if (UInt160.is_valid(public_key)) {
--- a/src/core/amount.js
+++ b/src/core/amount.js
@@ -49,13 +49,13 @@ const consts = {
  // Maximum possible amount for non-XRP currencies using the maximum mantissa
  // with maximum exponent. Corresponds to hex 0xEC6386F26FC0FFFF.
  max_value: '9999999999999999e80',
-  // Minimum possible amount for non-XRP currencies.
-  min_value: '-1000000000000000e-96'
+  // Minimum nonzero absolute value for non-XRP currencies.
+  min_value: '1000000000000000e-96'
 };

 const MAX_XRP_VALUE = new XRPValue(1e11);
 const MAX_IOU_VALUE = new IOUValue(consts.max_value);
-const MIN_IOU_VALUE = new IOUValue(consts.min_value).abs();
+const MIN_IOU_VALUE = new IOUValue(consts.min_value);

 const bi_xns_unit = new IOUValue(1e6);

@@ -105,6 +105,19 @@ Amount.NaN = function() {
  return result;                      // but let's be careful
 };

+Amount.from_components_unsafe = function(value: Value, currency: Currency,
+  issuer: UInt160, isNative: boolean
+) {
+  const result = new Amount(value);
+  result._is_native = isNative;
+  result._currency = currency;
+  result._issuer = issuer;
+
+  result._value = value.isZero() && value.isNegative() ?
+      value.negate() : value;
+  return result;
+};
+
 // be sure that _is_native is set properly BEFORE calling _set_value
 Amount.prototype._set_value = function(value: Value) {

@@ -122,27 +135,30 @@ Amount.prototype.abs = function() {
 };

 Amount.prototype.add = function(addend) {
-  const addendAmount = Amount.from_json(addend);
+  const addendAmount = addend instanceof Amount ?
+    addend : Amount.from_json(addend);

  if (!this.is_comparable(addendAmount)) {
    return new Amount();
  }

  return this._copy(this._value.add(addendAmount._value));
-
 };

 Amount.prototype.subtract = function(subtrahend) {
  // Correctness over speed, less code has less bugs, reuse add code.
-  return this.add(Amount.from_json(subtrahend).negate());
+  const subsAmount = subtrahend instanceof Amount ?
+    subtrahend : Amount.from_json(subtrahend);
+  return this.add(subsAmount.negate());
 };

 // XXX Diverges from cpp.
 Amount.prototype.multiply = function(multiplicand) {
+  const multiplicandValue = multiplicand instanceof Amount ?
+    multiplicand._value :
+    Amount.from_json(multiplicand)._value;

-  const multiplicandAmount = Amount.from_json(multiplicand);
-
-  return this._copy(this._value.multiply(multiplicandAmount._value));
+  return this._copy(this._value.multiply(multiplicandValue));

 };

@@ -151,9 +167,11 @@ Amount.prototype.scale = function(scaleFactor) {
 };

 Amount.prototype.divide = function(divisor) {
-  const divisorAmount = Amount.from_json(divisor);
+  const divisorValue = divisor instanceof Amount ?
+    divisor._value :
+    Amount.from_json(divisor)._value;

-  return this._copy(this._value.divide(divisorAmount._value));
+  return this._copy(this._value.divide(divisorValue));
 };

 /**
@@ -344,7 +362,7 @@ Amount.prototype._check_limits = function() {
 };

 Amount.prototype.clone = function(negate) {
-  return this.copyTo(new Amount(), negate);
+  return this.copyTo(new Amount(this._value), negate);
 };

 Amount.prototype._copy = function(value) {
@@ -354,9 +372,10 @@ Amount.prototype._copy = function(value) {
 };

 Amount.prototype.compareTo = function(to) {
-  const toAmount = Amount.from_json(to);
+  const toAmount = to instanceof Amount ? to : Amount.from_json(to);
+
  if (!this.is_comparable(toAmount)) {
-    return new Amount();
+    throw new Error('Not comparable');
  }
  return this._value.comparedTo(toAmount._value);
 };
@@ -730,6 +749,14 @@ Amount.prototype.to_number = function() {
  return Number(this.to_text());
 };

+
+// this one is needed because Value.abs creates new BigNumber,
+// and BigNumber constructor is very slow, so we want to
+// call it only if absolutely necessary
+function absValue(value: Value): Value {
+  return value.isNegative() ? value.abs() : value;
+}
+
 // Convert only value to JSON wire format.
 Amount.prototype.to_text = function() {
  if (!this.is_valid()) {
@@ -743,8 +770,8 @@ Amount.prototype.to_text = function() {
  // not native
  const offset = this._value.getExponent() - 15;
  const sign = this._value.isNegative() ? '-' : '';
-  const mantissa = utils.getMantissa16FromString(
-    this._value.abs().toString());
+  const mantissa =
+    utils.getMantissa16FromString(absValue(this._value).toString());
  if (offset !== 0 && (offset < -25 || offset > -4)) {
    // Use e notation.
    // XXX Clamp output.
--- a/src/core/autobridgecalculator.js
+++ b/src/core/autobridgecalculator.js
@@ -18,17 +18,24 @@ function assertValidLegOneOffer(legOneOffer, message) {
 }

 function AutobridgeCalculator(currencyGets, currencyPays,
-  legOneOffers, legTwoOffers, issuerGets, issuerPays) {
+  legOneOffers, legTwoOffers, issuerGets, issuerPays
+) {
  this._currencyGets = currencyGets;
  this._currencyPays = currencyPays;
+  this._currencyGetsHex = currencyGets.to_hex();
+  this._currencyPaysHex = currencyPays.to_hex();
  this._issuerGets = issuerGets;
+  this._issuerGetsObj = UInt160.from_json(issuerGets);
  this._issuerPays = issuerPays;
+  this._issuerPaysObj = UInt160.from_json(issuerPays);
  this.legOneOffers = _.cloneDeep(legOneOffers);
  this.legTwoOffers = _.cloneDeep(legTwoOffers);

  this._ownerFundsLeftover = {};
 }

+const NULL_AMOUNT = Utils.normalizeAmount('0');
+
 /**
 * Calculates an ordered array of autobridged offers by quality
 *
@@ -36,10 +43,13 @@ function AutobridgeCalculator(currencyGets, currencyPays,
 */

 AutobridgeCalculator.prototype.calculate = function() {
+  const oldMode = Amount.strict_mode;
+  Amount.strict_mode = false;
+
  let legOnePointer = 0;
  let legTwoPointer = 0;

-  let offersAutobridged = [];
+  const offersAutobridged = [];

  this.clearOwnerFundsLeftover();

@@ -55,8 +65,10 @@ AutobridgeCalculator.prototype.calculate = function() {
      this.adjustLegOneFundedAmount(legOneOffer);
    }

-    const legOneTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer);
-    const legTwoTakerPaysFunded = Utils.getOfferTakerPaysFunded(legTwoOffer);
+    const legOneTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer,
+      this._currencyPays, this._issuerPaysObj);
+    const legTwoTakerPaysFunded = Utils.getOfferTakerPaysFunded(legTwoOffer,
+      this._currencyGets, this._issuerGetsObj);

    if (legOneTakerGetsFunded.is_zero()) {
      legOnePointer++;
@@ -70,14 +82,17 @@ AutobridgeCalculator.prototype.calculate = function() {
      continue;
    }

-    if (legOneTakerGetsFunded.compareTo(legTwoTakerPaysFunded) > 0) {
+    //  using private fields for speed
+    if (legOneTakerGetsFunded._value.comparedTo(
+      legTwoTakerPaysFunded._value) > 0) {
      autobridgedOffer = this.getAutobridgedOfferWithClampedLegOne(
        legOneOffer,
        legTwoOffer
      );

      legTwoPointer++;
-    } else if (legTwoTakerPaysFunded.compareTo(legOneTakerGetsFunded) > 0) {
+    } else if (legTwoTakerPaysFunded._value.comparedTo(
+      legOneTakerGetsFunded._value) > 0) {
      autobridgedOffer = this.getAutobridgedOfferWithClampedLegTwo(
        legOneOffer,
        legTwoOffer
@@ -97,6 +112,7 @@ AutobridgeCalculator.prototype.calculate = function() {
    offersAutobridged.push(autobridgedOffer);
  }

+  Amount.strict_mode = oldMode;
  return offersAutobridged;
 };

@@ -112,15 +128,20 @@ AutobridgeCalculator.prototype.calculate = function() {

 AutobridgeCalculator.prototype.getAutobridgedOfferWithClampedLegOne =
 function(legOneOffer, legTwoOffer) {
-  const legOneTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer);
-  const legTwoTakerPaysFunded = Utils.getOfferTakerPaysFunded(legTwoOffer);
-  const legOneQuality = Utils.getOfferQuality(legOneOffer, this._currencyGets);
+  const legOneTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer,
+    this._currencyPays, this._issuerPaysObj);
+  const legTwoTakerPaysFunded = Utils.getOfferTakerPaysFunded(legTwoOffer,
+    this._currencyGets, this._issuerGetsObj);
+  const legOneQuality = Utils.getOfferQuality(legOneOffer, this._currencyGets,
+    this._currencyPays, this._issuerPaysObj);

-  const autobridgedTakerGets = Utils.getOfferTakerGetsFunded(legTwoOffer);
+  const autobridgedTakerGets = Utils.getOfferTakerGetsFunded(legTwoOffer,
+    this._currencyGets, this._issuerGetsObj);
  const autobridgedTakerPays = legTwoTakerPaysFunded.multiply(legOneQuality);

  if (legOneOffer.Account === legTwoOffer.Account) {
-    const legOneTakerGets = Utils.getOfferTakerGets(legOneOffer);
+    const legOneTakerGets = Utils.getOfferTakerGets(legOneOffer,
+      this._currencyPays, this._issuerPaysObj);
    const updatedTakerGets = legOneTakerGets.subtract(legTwoTakerPaysFunded);

    this.setLegOneTakerGets(legOneOffer, updatedTakerGets);
@@ -152,15 +173,20 @@ function(legOneOffer, legTwoOffer) {

 AutobridgeCalculator.prototype.getAutobridgedOfferWithClampedLegTwo =
 function(legOneOffer, legTwoOffer) {
-  const legOneTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer);
-  const legTwoTakerPaysFunded = Utils.getOfferTakerPaysFunded(legTwoOffer);
-  const legTwoQuality = Utils.getOfferQuality(legTwoOffer, this._currencyGets);
+  const legOneTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer,
+    this._currencyPays, this._issuerPaysObj);
+  const legTwoTakerPaysFunded = Utils.getOfferTakerPaysFunded(legTwoOffer,
+    this._currencyGets, this._issuerGetsObj);
+  const legTwoQuality = Utils.getOfferQuality(legTwoOffer, this._currencyGets,
+    this._currencyGets, this._issuerGetsObj);

  const autobridgedTakerGets = legOneTakerGetsFunded.divide(legTwoQuality);
-  const autobridgedTakerPays = Utils.getOfferTakerPaysFunded(legOneOffer);
+  const autobridgedTakerPays = Utils.getOfferTakerPaysFunded(legOneOffer,
+    this._currencyPays, this._issuerPaysObj);

  // Update funded amount since leg two offer was not completely consumed
-  legTwoOffer.taker_gets_funded = Utils.getOfferTakerGetsFunded(legTwoOffer)
+  legTwoOffer.taker_gets_funded = Utils.getOfferTakerGetsFunded(legTwoOffer,
+    this._currencyGets, this._issuerGetsObj)
    .subtract(autobridgedTakerGets)
    .to_text();
  legTwoOffer.taker_pays_funded = legTwoTakerPaysFunded
@@ -184,8 +210,10 @@ function(legOneOffer, legTwoOffer) {

 AutobridgeCalculator.prototype.getAutobridgedOfferWithoutClamps =
 function(legOneOffer, legTwoOffer) {
-  const autobridgedTakerGets = Utils.getOfferTakerGetsFunded(legTwoOffer);
-  const autobridgedTakerPays = Utils.getOfferTakerPaysFunded(legOneOffer);
+  const autobridgedTakerGets = Utils.getOfferTakerGetsFunded(legTwoOffer,
+    this._currencyGets, this._issuerGetsObj);
+  const autobridgedTakerPays = Utils.getOfferTakerPaysFunded(legOneOffer,
+    this._currencyPays, this._issuerPaysObj);

  return this.formatAutobridgedOffer(
    autobridgedTakerGets,
@@ -210,9 +238,7 @@ AutobridgeCalculator.prototype.clearOwnerFundsLeftover = function() {
 */

 AutobridgeCalculator.prototype.resetOwnerFundsLeftover = function(account) {
-  assert(UInt160.is_valid(account), 'Account is invalid');
-
-  this._ownerFundsLeftover[account] = Utils.normalizeAmount('0');
+  this._ownerFundsLeftover[account] = NULL_AMOUNT.clone();

  return this._ownerFundsLeftover[account];
 };
@@ -226,12 +252,10 @@ AutobridgeCalculator.prototype.resetOwnerFundsLeftover = function(account) {
 */

 AutobridgeCalculator.prototype.getLeftoverOwnerFunds = function(account) {
-  assert(UInt160.is_valid(account), 'Account is invalid');
-
  let amount = this._ownerFundsLeftover[account];

  if (!amount) {
-    amount = Utils.normalizeAmount('0');
+    amount = NULL_AMOUNT.clone();
  }

  return amount;
@@ -248,7 +272,6 @@ AutobridgeCalculator.prototype.getLeftoverOwnerFunds = function(account) {

 AutobridgeCalculator.prototype.addLeftoverOwnerFunds =
 function(account, amount) {
-  assert(UInt160.is_valid(account), 'Account is invalid');
  assert(amount instanceof Amount, 'Amount is invalid');

  this._ownerFundsLeftover[account] = this.getLeftoverOwnerFunds(account)
@@ -266,7 +289,6 @@ function(account, amount) {

 AutobridgeCalculator.prototype.setLeftoverOwnerFunds =
 function(account, amount) {
-  assert(UInt160.is_valid(account), 'Account is invalid');
  assert(amount instanceof Amount, 'Amount is invalid');

  this._ownerFundsLeftover[account] = amount;
@@ -291,13 +313,13 @@ function(takerGets, takerPays) {

  autobridgedOffer.TakerGets = {
    value: takerGets.to_text(),
-    currency: this._currencyGets.to_hex(),
+    currency: this._currencyGetsHex,
    issuer: this._issuerGets
  };

  autobridgedOffer.TakerPays = {
    value: takerPays.to_text(),
-    currency: this._currencyPays.to_hex(),
+    currency: this._currencyPaysHex,
    issuer: this._issuerPays
  };

@@ -308,7 +330,9 @@ function(takerGets, takerPays) {

  autobridgedOffer.autobridged = true;

-  autobridgedOffer.BookDirectory = Utils.convertOfferQualityToHex(quality);
+  autobridgedOffer.BookDirectory =
+    Utils.convertOfferQualityToHexFromText(autobridgedOffer.quality);
+  autobridgedOffer.qualityHex = autobridgedOffer.BookDirectory;

  return autobridgedOffer;
 };
@@ -325,11 +349,13 @@ function(takerGets, takerPays) {
 AutobridgeCalculator.prototype.unclampLegOneOwnerFunds = function(legOneOffer) {
  assertValidLegOneOffer(legOneOffer, 'Leg one offer is invalid');

-  legOneOffer.initTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer);
+  legOneOffer.initTakerGetsFunded = Utils.getOfferTakerGetsFunded(legOneOffer,
+    this._currencyPays, this._issuerPaysObj);

  this.setLegOneTakerGetsFunded(
    legOneOffer,
-    Utils.getOfferTakerGets(legOneOffer)
+    Utils.getOfferTakerGets(legOneOffer, this._currencyPays,
+      this._issuerPaysObj)
  );
 };

@@ -350,7 +376,8 @@ AutobridgeCalculator.prototype.unclampLegOneOwnerFunds = function(legOneOffer) {
 AutobridgeCalculator.prototype.clampLegOneOwnerFunds = function(legOneOffer) {
  assertValidLegOneOffer(legOneOffer, 'Leg one offer is invalid');

-  const takerGets = Utils.getOfferTakerGets(legOneOffer);
+  const takerGets = Utils.getOfferTakerGets(legOneOffer, this._currencyPays,
+    this._issuerPaysObj);

  if (takerGets.compareTo(legOneOffer.initTakerGetsFunded) > 0) {
    // After clamping, TakerGets is still greater than initial funded amount
@@ -375,12 +402,16 @@ function(legOneOffer) {
  assertValidLegOneOffer(legOneOffer, 'Leg one offer is invalid');
  assert(!legOneOffer.is_fully_funded, 'Leg one offer cannot be fully funded');

-  const fundedSum = Utils.getOfferTakerGetsFunded(legOneOffer)
+  const fundedSum = Utils.getOfferTakerGetsFunded(legOneOffer,
+    this._currencyPays, this._issuerPaysObj)
    .add(this.getLeftoverOwnerFunds(legOneOffer.Account));

-  if (fundedSum.compareTo(Utils.getOfferTakerGets(legOneOffer)) >= 0) {
+  if (fundedSum.compareTo(Utils.getOfferTakerGets(legOneOffer,
+    this._currencyPays, this._issuerPaysObj)) >= 0
+  ) {
    // There are enough extra funds to fully fund the offer
-    const legOneTakerGets = Utils.getOfferTakerGets(legOneOffer);
+    const legOneTakerGets = Utils.getOfferTakerGets(legOneOffer,
+      this._currencyPays, this._issuerPaysObj);
    const updatedLeftover = fundedSum.subtract(legOneTakerGets);

    this.setLegOneTakerGetsFunded(legOneOffer, legOneTakerGets);
@@ -407,8 +438,9 @@ function setLegOneTakerGetsFunded(legOneOffer, takerGetsFunded) {

  legOneOffer.taker_gets_funded = takerGetsFunded.to_text();
  legOneOffer.taker_pays_funded = takerGetsFunded
-    .multiply(Utils.getOfferQuality(legOneOffer, this._currencyGets))
-    .to_text();
+    .multiply(Utils.getOfferQuality(legOneOffer, this._currencyGets,
+      this._currencyPays, this._issuerPaysObj))
+      .to_text();

  if (legOneOffer.taker_gets_funded === legOneOffer.TakerGets.value) {
    legOneOffer.is_fully_funded = true;
@@ -428,10 +460,11 @@ function(legOneOffer, takerGets) {
  assertValidLegOneOffer(legOneOffer, 'Leg one offer is invalid');
  assert(takerGets instanceof Amount, 'Taker gets funded is invalid');

-  const legOneQuality = Utils.getOfferQuality(legOneOffer, this._currencyGets);
+  const legOneQuality = Utils.getOfferQuality(legOneOffer, this._currencyGets,
+    this._currencyPays, this._issuerPaysObj);

  legOneOffer.TakerGets = takerGets.to_text();
-  legOneOffer.TakerPays = takerGets.multiply(legOneQuality);
+  legOneOffer.TakerPays = takerGets.multiply(legOneQuality).to_json();
 };

 module.exports = AutobridgeCalculator;
--- a/src/core/base.js
+++ b/src/core/base.js
@@ -1,18 +1,11 @@
 'use strict';
-const _ = require('lodash');
-const sjcl = require('./utils').sjcl;
-const utils = require('./utils');
+
+const BN = require('bn.js');
 const extend = require('extend');
-const convertBase = require('./baseconverter');
+const {encode, decode} = require('ripple-address-codec');

 const Base = {};

-const alphabets = Base.alphabets = {
-  ripple: 'rpshnaf39wBUDNEGHJKLM4PQRST7VWXYZ2bcdeCg65jkm8oFqi1tuvAxyz',
-  tipple: 'RPShNAF39wBUDnEGHJKLM4pQrsT7VWXYZ2bcdeCg65jkm8ofqi1tuvaxyz',
-  bitcoin: '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
-};
-
 extend(Base, {
  VER_NONE: 1,
  VER_NODE_PUBLIC: 28,
@@ -21,134 +14,44 @@ extend(Base, {
  VER_ACCOUNT_PUBLIC: 35,
  VER_ACCOUNT_PRIVATE: 34,
  VER_FAMILY_GENERATOR: 41,
-  VER_FAMILY_SEED: 33
-});
-
-function sha256(bytes) {
-  return sjcl.codec.bytes.fromBits(
-    sjcl.hash.sha256.hash(sjcl.codec.bytes.toBits(bytes)));
-}
-
-function encodeString(alphabet, input) {
-  if (input.length === 0) {
-    return '';
-  }
-
-  const leadingZeros = _.takeWhile(input, function(d) {
-    return d === 0;
-  });
-  const out = convertBase(input, 256, 58).map(function(digit) {
-    if (digit < 0 || digit >= alphabet.length) {
-      throw new Error('Value ' + digit + ' is out of bounds for encoding');
-    }
-    return alphabet[digit];
-  });
-  const prefix = leadingZeros.map(function() {
-    return alphabet[0];
-  });
-  return prefix.concat(out).join('');
-}
-
-function decodeString(indexes, input) {
-  if (input.length === 0) {
-    return [];
-  }
-
-  const input58 = input.split('').map(function(c) {
-    const charCode = c.charCodeAt(0);
-    if (charCode >= indexes.length || indexes[charCode] === -1) {
-      throw new Error('Character ' + c + ' is not valid for encoding');
-    }
-    return indexes[charCode];
-  });
-  const leadingZeros = _.takeWhile(input58, function(d) {
-    return d === 0;
-  });
-  const out = convertBase(input58, 58, 256);
-  return leadingZeros.concat(out);
-}
-
-function Base58(alphabet) {
-  const indexes = utils.arraySet(128, -1);
-  for (let i = 0; i < alphabet.length; i++) {
-    indexes[alphabet.charCodeAt(i)] = i;
-  }
-  return {
-    decode: decodeString.bind(null, indexes),
-    encode: encodeString.bind(null, alphabet)
-  };
-}
-
-Base.encoders = {};
-Object.keys(alphabets).forEach(function(alphabet) {
-  Base.encoders[alphabet] = new Base58(alphabets[alphabet]);
+  VER_FAMILY_SEED: 33,
+  VER_ED25519_SEED: [0x01, 0xE1, 0x4B]
 });

 // --> input: big-endian array of bytes.
 // <-- string at least as long as input.
-Base.encode = function(input, alpha) {
-  return this.encoders[alpha || 'ripple'].encode(input);
+Base.encode = function(input, alphabet) {
+  return encode(input, {alphabet});
 };

 // --> input: String
 // <-- array of bytes or undefined.
-Base.decode = function(input, alpha) {
+Base.decode = function(input, alphabet) {
  if (typeof input !== 'string') {
    return undefined;
  }
  try {
-    return this.encoders[alpha || 'ripple'].decode(input);
+    return decode(input, {alphabet});
  } catch (e) {
    return undefined;
  }
 };

-Base.verify_checksum = function(bytes) {
-  const computed = sha256(sha256(bytes.slice(0, -4))).slice(0, 4);
-  const checksum = bytes.slice(-4);
-  return _.isEqual(computed, checksum);
-};
-
 // --> input: Array
 // <-- String
 Base.encode_check = function(version, input, alphabet) {
-  const buffer = [].concat(version, input);
-  const check = sha256(sha256(buffer)).slice(0, 4);
-
-  return Base.encode([].concat(buffer, check), alphabet);
+  return encode(input, {version, alphabet});
 };

 // --> input : String
-// <-- NaN || sjcl.bn
+// <-- NaN || BN
 Base.decode_check = function(version, input, alphabet) {
-  const buffer = Base.decode(input, alphabet);
-
-  if (!buffer || buffer.length < 5) {
+  try {
+    const decoded = decode(input, {version, alphabet});
+    return new BN(decoded);
+  } catch (e) {
    return NaN;
  }
-
-  // Single valid version
-  if (typeof version === 'number' && buffer[0] !== version) {
-    return NaN;
-  }
-
-  // Multiple allowed versions
-  if (Array.isArray(version) && _.every(version, function(v) {
-    return v !== buffer[0];
-  })) {
-    return NaN;
-  }
-
-  if (!Base.verify_checksum(buffer)) {
-    return NaN;
-  }
-
-  // We'll use the version byte to add a leading zero, this ensures JSBN doesn't
-  // intrepret the value as a negative number
-  buffer[0] = 0;
-
-  return sjcl.bn.fromBits(
-      sjcl.codec.bytes.toBits(buffer.slice(0, -4)));
 };

 exports.Base = Base;
--- a/src/core/baseconverter.js
+++ b/src/core/baseconverter.js
@@ -1,28 +1,41 @@
 'use strict';

+
 function normalize(digitArray) {
-  while (digitArray[0] === 0) {
-    digitArray.shift();
+  let i = 0;
+  while (digitArray[i] === 0) {
+    ++i;
+  }
+  if (i > 0) {
+    digitArray.splice(0, i);
  }
  return digitArray;
 }

 function divmod(digitArray, base, divisor) {
-  var remainder = 0;
-  var quotient = [];
-  for (var j = 0; j < digitArray.length; j++) {
-    var temp = remainder * base + parseInt(digitArray[j], 10);
-    quotient.push(Math.floor(temp / divisor));
+  let remainder = 0;
+  let temp;
+  let divided;
+  let j = -1;
+
+  const length = digitArray.length;
+  const quotient = new Array(length);
+
+  while (++j < length) {
+    temp = remainder * base + digitArray[j];
+    divided = temp / divisor;
+    quotient[j] = divided << 0;
    remainder = temp % divisor;
  }
  return {quotient: normalize(quotient), remainder: remainder};
 }

 function convertBase(digitArray, fromBase, toBase) {
-  var result = [];
-  var dividend = digitArray;
+  const result = [];
+  let dividend = digitArray;
+  let qr;
  while (dividend.length > 0) {
-    var qr = divmod(dividend, fromBase, toBase);
+    qr = divmod(dividend, fromBase, toBase);
    result.unshift(qr.remainder);
    dividend = qr.quotient;
  }
--- a/src/core/binformat.js
+++ b/src/core/binformat.js
@@ -1,6 +1,8 @@
 'use strict';

-/*eslint no-multi-spaces:0,space-in-brackets:0,key-spacing:0,comma-spacing:0*/
+/*eslint-disable max-len,spaced-comment,array-bracket-spacing,key-spacing*/
+/*eslint-disable no-multi-spaces,comma-spacing*/
+/*eslint-disable no-multi-spaces:0,space-in-brackets:0,key-spacing:0,comma-spacing:0*/

 /**
 * Data type map.
@@ -52,7 +54,8 @@ const FIELDS_MAP = exports.fields = {
  // Common types
  1: { // Int16
    1: 'LedgerEntryType',
-    2: 'TransactionType'
+    2: 'TransactionType',
+    3: 'SignerWeight'
  },
  2: { // Int32
    2: 'Flags',
@@ -87,7 +90,11 @@ const FIELDS_MAP = exports.fields = {
    31: 'ReserveBase',
    32: 'ReserveIncrement',
    33: 'SetFlag',
-    34: 'ClearFlag'
+    34: 'ClearFlag',
+    35: 'SignerQuorum',
+    36: 'CancelAfter',
+    37: 'FinishAfter',
+    38: 'SignerListID'
  },
  3: { // Int64
    1: 'IndexNext',
@@ -116,7 +123,8 @@ const FIELDS_MAP = exports.fields = {
    17: 'InvoiceID',
    18: 'Nickname',
    19: 'Amendment',
-    20: 'TicketID'
+    20: 'TicketID',
+    21: 'Digest'
  },
  6: { // Amount
    1: 'Amount',
@@ -146,7 +154,8 @@ const FIELDS_MAP = exports.fields = {
    11: 'CreateCode',
    12: 'MemoType',
    13: 'MemoData',
-    14: 'MemoFormat'
+    14: 'MemoFormat',
+    17: 'Proof'
  },
  8: { // Account
    1: 'Account',
@@ -166,13 +175,15 @@ const FIELDS_MAP = exports.fields = {
    7: 'FinalFields',
    8: 'NewFields',
    9: 'TemplateEntry',
-    10: 'Memo'
+    10: 'Memo',
+    11: 'SignerEntry',
+    16: 'Signer'
  },
  15: { // Array
    1: undefined,  // end of Array
    2: 'SigningAccounts',
-    3: 'TxnSignatures',
-    4: 'Signatures',
+    3: 'Signers',
+    4: 'SignerEntries',
    5: 'Template',
    6: 'Necessary',
    7: 'Sufficient',
@@ -183,7 +194,7 @@ const FIELDS_MAP = exports.fields = {
  // Uncommon types
  16: { // Int8
    1: 'CloseResolution',
-    2: 'TemplateEntryType',
+    2: 'Method',
    3: 'TransactionResult'
  },
  17: { // Hash160
@@ -202,17 +213,17 @@ const FIELDS_MAP = exports.fields = {
  }
 };

-let INVERSE_FIELDS_MAP = exports.fieldsInverseMap = { };
+const INVERSE_FIELDS_MAP = exports.fieldsInverseMap = { };

 Object.keys(FIELDS_MAP).forEach(function(k1) {
  Object.keys(FIELDS_MAP[k1]).forEach(function(k2) {
-    INVERSE_FIELDS_MAP[FIELDS_MAP[k1][k2]] = [ Number(k1), Number(k2) ];
+    INVERSE_FIELDS_MAP[FIELDS_MAP[k1][k2]] = [Number(k1), Number(k2)];
  });
 });

-const REQUIRED = exports.REQUIRED = 0,
-      OPTIONAL = exports.OPTIONAL = 1,
-      DEFAULT  = exports.DEFAULT  = 2;
+const REQUIRED = exports.REQUIRED = 0;
+const OPTIONAL = exports.OPTIONAL = 1;
+const DEFAULT  = exports.DEFAULT  = 2;

 const base = [
  [ 'TransactionType'    , REQUIRED ],
@@ -226,76 +237,100 @@ const base = [
  [ 'SigningPubKey'      , REQUIRED ],
  [ 'TxnSignature'       , OPTIONAL ],
  [ 'AccountTxnID'       , OPTIONAL ],
-  [ 'Memos'              , OPTIONAL ]
+  [ 'Memos'              , OPTIONAL ],
+  [ 'Signers'            , OPTIONAL ]
 ];

 exports.tx = {
  AccountSet: [3].concat(base, [
-    [ 'EmailHash'          , OPTIONAL ],
-    [ 'WalletLocator'      , OPTIONAL ],
-    [ 'WalletSize'         , OPTIONAL ],
-    [ 'MessageKey'         , OPTIONAL ],
-    [ 'Domain'             , OPTIONAL ],
-    [ 'TransferRate'       , OPTIONAL ],
-    [ 'SetFlag'            , OPTIONAL ],
-    [ 'ClearFlag'          , OPTIONAL ]
+    ['EmailHash'          , OPTIONAL],
+    ['WalletLocator'      , OPTIONAL],
+    ['WalletSize'         , OPTIONAL],
+    ['MessageKey'         , OPTIONAL],
+    ['Domain'             , OPTIONAL],
+    ['TransferRate'       , OPTIONAL],
+    ['SetFlag'            , OPTIONAL],
+    ['ClearFlag'          , OPTIONAL]
  ]),
  TrustSet: [20].concat(base, [
-    [ 'LimitAmount'        , OPTIONAL ],
-    [ 'QualityIn'          , OPTIONAL ],
-    [ 'QualityOut'         , OPTIONAL ]
+    ['LimitAmount'        , OPTIONAL],
+    ['QualityIn'          , OPTIONAL],
+    ['QualityOut'         , OPTIONAL]
  ]),
  OfferCreate: [7].concat(base, [
-    [ 'TakerPays'          , REQUIRED ],
-    [ 'TakerGets'          , REQUIRED ],
-    [ 'Expiration'         , OPTIONAL ],
-    [ 'OfferSequence'      , OPTIONAL ]
+    ['TakerPays'          , REQUIRED],
+    ['TakerGets'          , REQUIRED],
+    ['Expiration'         , OPTIONAL],
+    ['OfferSequence'      , OPTIONAL]
  ]),
  OfferCancel: [8].concat(base, [
-    [ 'OfferSequence'      , REQUIRED ]
+    ['OfferSequence'      , REQUIRED]
  ]),
  SetRegularKey: [5].concat(base, [
-    [ 'RegularKey'         , OPTIONAL ]
+    ['RegularKey'         , OPTIONAL]
  ]),
  Payment: [0].concat(base, [
-    [ 'Destination'        , REQUIRED ],
-    [ 'Amount'             , REQUIRED ],
-    [ 'SendMax'            , OPTIONAL ],
-    [ 'Paths'              , DEFAULT  ],
-    [ 'InvoiceID'          , OPTIONAL ],
-    [ 'DestinationTag'     , OPTIONAL ]
+    ['Destination'        , REQUIRED],
+    ['Amount'             , REQUIRED],
+    ['SendMax'            , OPTIONAL],
+    ['Paths'              , DEFAULT],
+    ['InvoiceID'          , OPTIONAL],
+    ['DestinationTag'     , OPTIONAL]
  ]),
  Contract: [9].concat(base, [
-    [ 'Expiration'         , REQUIRED ],
-    [ 'BondAmount'         , REQUIRED ],
-    [ 'StampEscrow'        , REQUIRED ],
-    [ 'RippleEscrow'       , REQUIRED ],
-    [ 'CreateCode'         , OPTIONAL ],
-    [ 'FundCode'           , OPTIONAL ],
-    [ 'RemoveCode'         , OPTIONAL ],
-    [ 'ExpireCode'         , OPTIONAL ]
+    ['Expiration'         , REQUIRED],
+    ['BondAmount'         , REQUIRED],
+    ['StampEscrow'        , REQUIRED],
+    ['RippleEscrow'       , REQUIRED],
+    ['CreateCode'         , OPTIONAL],
+    ['FundCode'           , OPTIONAL],
+    ['RemoveCode'         , OPTIONAL],
+    ['ExpireCode'         , OPTIONAL]
  ]),
  RemoveContract: [10].concat(base, [
-    [ 'Target'             , REQUIRED ]
+    ['Target'             , REQUIRED]
  ]),
  EnableFeature: [100].concat(base, [
-    [ 'Feature'            , REQUIRED ]
+    ['Feature'            , REQUIRED]
  ]),
  EnableAmendment: [100].concat(base, [
-    [ 'Amendment'          , REQUIRED ]
+    ['Amendment'          , REQUIRED]
  ]),
  SetFee: [101].concat(base, [
-    [ 'BaseFee'            , REQUIRED ],
-    [ 'ReferenceFeeUnits'  , REQUIRED ],
-    [ 'ReserveBase'        , REQUIRED ],
-    [ 'ReserveIncrement'   , REQUIRED ]
+    ['BaseFee'            , REQUIRED],
+    ['ReferenceFeeUnits'  , REQUIRED],
+    ['ReserveBase'        , REQUIRED],
+    ['ReserveIncrement'   , REQUIRED]
  ]),
  TicketCreate: [10].concat(base, [
-    [ 'Target'             , OPTIONAL ],
-    [ 'Expiration'         , OPTIONAL ]
+    ['Target'             , OPTIONAL],
+    ['Expiration'         , OPTIONAL]
  ]),
  TicketCancel: [11].concat(base, [
-    [ 'TicketID'           , REQUIRED ]
+    ['TicketID'           , REQUIRED]
+  ]),
+  SignerListSet: [12].concat(base, [
+    ['SignerQuorum', REQUIRED],
+    ['SignerEntries', OPTIONAL]
+  ]),
+  SuspendedPaymentCreate: [1].concat(base, [
+    ['Destination'        , REQUIRED],
+    ['Amount'             , REQUIRED],
+    ['Digest'             , OPTIONAL],
+    ['CancelAfter'        , OPTIONAL],
+    ['FinishAfter'        , OPTIONAL],
+    ['DestinationTag'     , OPTIONAL]
+  ]),
+  SuspendedPaymentFinish: [2].concat(base, [
+    ['Owner'              , REQUIRED],
+    ['OfferSequence'      , REQUIRED],
+    ['Method'             , OPTIONAL],
+    ['Digest'             , OPTIONAL],
+    ['Proof'              , OPTIONAL]
+  ]),
+  SuspendedPaymentCancel: [4].concat(base, [
+    ['Owner'              , REQUIRED],
+    ['OfferSequence'      , REQUIRED]
  ])
 };

@@ -396,13 +431,22 @@ exports.ledger = {
    ['LedgerIndex',         OPTIONAL],
    ['Balance',             REQUIRED],
    ['LowLimit',            REQUIRED],
-    ['HighLimit',           REQUIRED]])
+    ['HighLimit',           REQUIRED]]),
+  SignerList: [83].concat(sleBase,[
+    ['OwnerNode',           REQUIRED],
+    ['SignerQuorum',        REQUIRED],
+    ['SignerEntries',       REQUIRED],
+    ['SignerListID',        REQUIRED],
+    ['PreviousTxnID',       REQUIRED],
+    ['PreviousTxnLgrSeq',   REQUIRED]
+  ])
 };

 exports.metadata = [
-  [ 'TransactionIndex'     , REQUIRED ],
-  [ 'TransactionResult'    , REQUIRED ],
-  [ 'AffectedNodes'        , REQUIRED ]
+  ['DeliveredAmount'      , OPTIONAL],
+  ['TransactionIndex'     , REQUIRED],
+  ['TransactionResult'    , REQUIRED],
+  ['AffectedNodes'        , REQUIRED]
 ];

 exports.ter = {
@@ -422,7 +466,7 @@ exports.ter = {
  tecNO_LINE_REDUNDANT     : 127,
  tecPATH_DRY              : 128,
  tecUNFUNDED              : 129,  // Deprecated, old ambiguous unfunded.
-  tecMASTER_DISABLED       : 130,
+  tecNO_ALTERNATIVE_KEY    : 130,
  tecNO_REGULAR_KEY        : 131,
  tecOWNERS                : 132,
  tecNO_ISSUER             : 133,
@@ -436,5 +480,6 @@ exports.ter = {
  tecINSUFFICIENT_RESERVE  : 141,
  tecNEED_MASTER_KEY       : 142,
  tecDST_TAG_NEEDED        : 143,
-  tecINTERNAL              : 144
+  tecINTERNAL              : 144,
+  tecOVERSIZE              : 145
 };
--- a/src/core/currency.js
+++ b/src/core/currency.js
@@ -1,15 +1,15 @@
 'use strict';

-var extend = require('extend');
-var UInt160 = require('./uint160').UInt160;
-var utils = require('./utils');
-var Float = require('./ieee754').Float;
+const extend = require('extend');
+const UInt160 = require('./uint160').UInt160;
+const utils = require('./utils');
+const Float = require('./ieee754').Float;

 //
 // Currency support
 //

-var Currency = extend(function() {
+const Currency = extend(function() {
  // Internal form: 0 = XRP. 3 letter-code.
  // XXX Internal should be 0 or hex with three letter annotation when valid.

@@ -22,7 +22,7 @@ var Currency = extend(function() {
  this._update();
 }, UInt160);

-Currency.prototype = extend({}, UInt160.prototype);
+Currency.prototype = Object.create(extend({}, UInt160.prototype));
 Currency.prototype.constructor = Currency;

 Currency.HEX_CURRENCY_BAD = '0000000000000000000000005852500000000000';
@@ -61,12 +61,12 @@ Currency.HEX_CURRENCY_BAD = '0000000000000000000000005852500000000000';
 *
 */

-/*eslint-disable max-len*/
+/* eslint-disable max-len*/
 Currency.prototype.human_RE = /^\s*([a-zA-Z0-9\<\>\(\)\{\}\[\]\|\?\!\@\#\$\%\^\&]{3})(\s*-\s*[- \w]+)?(\s*\(-?\d+\.?\d*%pa\))?\s*$/;
-/*eslint-enable max-len*/
+/* eslint-enable max-len*/

 Currency.from_json = function(j, shouldInterpretXrpAsIou) {
-    return (new Currency()).parse_json(j, shouldInterpretXrpAsIou);
+  return (new Currency()).parse_json(j, shouldInterpretXrpAsIou);
 };

 Currency.from_human = function(j, opts) {
@@ -78,7 +78,7 @@ Currency.prototype.parse_json = function(j, shouldInterpretXrpAsIou) {
  this._value = NaN;

  if (j instanceof Currency) {
-    this._value = j.copyTo({})._value;
+    this._value = j._value;
    this._update();
    return this;
  }
@@ -111,10 +111,10 @@ Currency.prototype.parse_json = function(j, shouldInterpretXrpAsIou) {
      }

      // match the given string to see if it's in an allowed format
-      var matches = j.match(this.human_RE);
+      const matches = j.match(this.human_RE);

      if (matches) {
-        var currencyCode = matches[1];
+        let currencyCode = matches[1];

        // for the currency 'XRP' case
        // we drop everything else that could have been provided
@@ -131,14 +131,14 @@ Currency.prototype.parse_json = function(j, shouldInterpretXrpAsIou) {
        // the full currency is matched as it is part of the valid currency
        // format, but not stored
        // var full_currency = matches[2] || '';
-        var interest = matches[3] || '';
+        const interest = matches[3] || '';

        // interest is defined as interest per year, per annum (pa)
-        var percentage = interest.match(/(-?\d+\.?\d+)/);
+        let percentage = interest.match(/(-?\d+\.?\d+)/);

        currencyCode = currencyCode.toUpperCase();

-        var currencyData = utils.arraySet(20, 0);
+        const currencyData = utils.arraySet(20, 0);

        if (percentage) {
          /*
@@ -164,15 +164,15 @@ Currency.prototype.parse_json = function(j, shouldInterpretXrpAsIou) {

          // the interest or demurrage is expressed as a yearly (per annum)
          // value
-          var secondsPerYear = 31536000; // 60 * 60 * 24 * 365
+          const secondsPerYear = 31536000; // 60 * 60 * 24 * 365

          // Calculating the interest e-fold
          // 0.5% demurrage is expressed 0.995, 0.005 less than 1
          // 0.5% interest is expressed as 1.005, 0.005 more than 1
-          var interestEfold = secondsPerYear / Math.log(1 + percentage / 100);
-          var bytes = Float.toIEEE754Double(interestEfold);
+          const interestEfold = secondsPerYear / Math.log(1 + percentage / 100);
+          const bytes = Float.toIEEE754Double(interestEfold);

-          for (var i = 0; i <= bytes.length; i++) {
+          for (let i = 0; i <= bytes.length; i++) {
            currencyData[8 + i] = bytes[i] & 0xff;
          }

@@ -204,10 +204,10 @@ Currency.prototype.parse_human = function(j) {
 */

 Currency.prototype._update = function() {
-  var bytes = this.to_bytes();
+  const bytes = this.to_bytes();

  // is it 0 everywhere except 12, 13, 14?
-  var isZeroExceptInStandardPositions = true;
+  let isZeroExceptInStandardPositions = true;

  if (!bytes) {
    return;
@@ -219,7 +219,7 @@ Currency.prototype._update = function() {
  this._interest_period = NaN;
  this._iso_code = '';

-  for (var i = 0; i < 20; i++) {
+  for (let i = 0; i < 20; i++) {
    isZeroExceptInStandardPositions = isZeroExceptInStandardPositions
    && (i === 12 || i === 13 || i === 14 || bytes[i] === 0);
  }
@@ -249,6 +249,34 @@ Currency.prototype._update = function() {
  }
 };

+/**
+ * Returns copy.
+ *
+ * This copies code from UInt.copyTo so we do not call _update,
+ * bvecause to_bytes is very expensive.
+ */
+
+Currency.prototype.copyTo = function(d) {
+  d._value = this._value;
+
+  if (this._version_byte !== undefined) {
+    d._version_byte = this._version_byte;
+  }
+
+  if (!d.is_valid()) {
+    return d;
+  }
+
+  d._native = this._native;
+  d._type = this._type;
+  d._interest_start = this._interest_start;
+  d._interest_period = this._interest_period;
+  d._iso_code = this._iso_code;
+
+  return d;
+};
+
+
 // XXX Probably not needed anymore?
 /*
 Currency.prototype.parse_bytes = function(byte_array) {
@@ -300,18 +328,20 @@ Currency.prototype.has_interest = function() {

 /**
 *
- * @param {number} referenceDate number of seconds since the Ripple Epoch
+ * @param {number} referenceDate_ number of seconds since the Ripple Epoch
 * (0:00 on January 1, 2000 UTC) used to calculate the
 * interest over provided interval pass in one years
 * worth of seconds to ge the yearly interest
 * @returns {number} interest for provided interval, can be negative for
 * demurred currencies
 */
-Currency.prototype.get_interest_at = function(referenceDate) {
+Currency.prototype.get_interest_at = function(referenceDate_) {
  if (!this.has_interest()) {
    return 0;
  }

+  let referenceDate = referenceDate_;
+
  // use one year as a default period
  if (!referenceDate) {
    referenceDate = this._interest_start + 3600 * 24 * 365;
@@ -326,13 +356,14 @@ Currency.prototype.get_interest_at = function(referenceDate) {
                / this._interest_period);
 };

-Currency.prototype.get_interest_percentage_at
-= function(referenceDate, decimals) {
-  var interest = this.get_interest_at(referenceDate, decimals);
+Currency.prototype.get_interest_percentage_at = function(referenceDate,
+  decimals
+) {
+  let interest = this.get_interest_at(referenceDate, decimals);

  // convert to percentage
  interest = (interest * 100) - 100;
-  var decimalMultiplier = decimals ? Math.pow(10, decimals) : 100;
+  const decimalMultiplier = decimals ? Math.pow(10, decimals) : 100;

  // round to two decimals behind the dot
  return Math.round(interest * decimalMultiplier) / decimalMultiplier;
@@ -347,18 +378,14 @@ Currency.prototype.get_interest_percentage_at
 //  return UInt.prototype.is_valid() && ...;
 // };

-Currency.prototype.to_json = function(opts) {
+Currency.prototype.to_json = function(opts = {}) {
  if (!this.is_valid()) {
    // XXX This is backwards compatible behavior, but probably not very good.
    return 'XRP';
  }

-  if (!opts) {
-    opts = {};
-  }
-
-  var currency;
-  var fullName = opts && opts.full_name ? ' - ' + opts.full_name : '';
+  let currency;
+  const fullName = opts && opts.full_name ? ' - ' + opts.full_name : '';
  opts.show_interest = opts.show_interest !== undefined
  ? opts.show_interest
  : this.has_interest();
@@ -366,8 +393,8 @@ Currency.prototype.to_json = function(opts) {
  if (!opts.force_hex && /^[A-Z0-9]{3}$/.test(this._iso_code)) {
    currency = this._iso_code + fullName;
    if (opts.show_interest) {
-      var decimals = !isNaN(opts.decimals) ? opts.decimals : undefined;
-      var interestPercentage = this.has_interest()
+      const decimals = !isNaN(opts.decimals) ? opts.decimals : undefined;
+      const interestPercentage = this.has_interest()
      ? this.get_interest_percentage_at(
          this._interest_start + 3600 * 24 * 365, decimals
        )
--- a/src/core/hashprefixes.js
+++ b/src/core/hashprefixes.js
@@ -30,6 +30,8 @@ exports.HASH_LEAF_NODE = 0x4D4C4E00; // 'MLN'
 exports.HASH_TX_SIGN = 0x53545800; // 'STX'
 // inner transaction to sign (TESTNET)
 exports.HASH_TX_SIGN_TESTNET = 0x73747800; // 'stx'
+// inner transaction to multisign
+exports.HASH_TX_MULTISIGN = 0x534D5400; // 'SMT'

 Object.keys(exports).forEach(function(k) {
  exports[k + '_BYTES'] = toBytes(exports[k]);
--- a/src/core/index.js
+++ b/src/core/index.js
@@ -21,47 +21,12 @@ exports.TransactionQueue = require('./transactionqueue').TransactionQueue;
 exports.convertBase = require('./baseconverter');

 exports._test = {
+  IOUValue: require('./iouvalue').IOUValue,
  Log: require('./log'),
  PathFind: require('./pathfind').PathFind,
  TransactionManager: require('./transactionmanager').TransactionManager,
-  RangeSet: require('./rangeset').RangeSet
+  RangeSet: require('./rangeset').RangeSet,
+  HashPrefixes: require('./hashprefixes')
 };

-// Important: We do not guarantee any specific version of SJCL or for any
-// specific features to be included. The version and configuration may change at
-// any time without warning.
-//
-// However, for programs that are tied to a specific version of ripple.js like
-// the official client, it makes sense to expose the SJCL instance so we don't
-// have to include it twice.
-exports.sjcl = require('./utils').sjcl;
-exports.Wallet = require('ripple-wallet-generator')({sjcl: exports.sjcl});
 exports.types = require('./serializedtypes');
-
-// camelCase to under_scored API conversion
-function attachUnderscored(name) {
-  const o = exports[name];
-
-  Object.keys(o.prototype).forEach(function(key) {
-    const UPPERCASE = /([A-Z]{1})[a-z]+/g;
-
-    if (!UPPERCASE.test(key)) {
-      return;
-    }
-
-    const underscored = key.replace(UPPERCASE, function(c) {
-      return '_' + c.toLowerCase();
-    });
-
-    o.prototype[underscored] = o.prototype[key];
-  });
-}
-
-['Remote',
- 'Request',
- 'Transaction',
- 'Account',
- 'Server'
-].forEach(attachUnderscored);
-
-// vim:sw=2:sts=2:ts=8:et
--- a/src/core/keypair.js
+++ b/src/core/keypair.js
@@ -1,102 +0,0 @@
-'use strict';
-
-/*eslint new-cap: 1*/
-
-var sjcl = require('./utils').sjcl;
-
-var UInt160 = require('./uint160').UInt160;
-var UInt256 = require('./uint256').UInt256;
-var Base = require('./base').Base;
-
-function KeyPair() {
-  this._curve = sjcl.ecc.curves.k256;
-  this._secret = null;
-  this._pubkey = null;
-}
-
-KeyPair.from_bn_secret = function(j) {
-  return (j instanceof this) ? j.clone() : (new this()).parse_bn_secret(j);
-};
-
-KeyPair.prototype.parse_bn_secret = function(j) {
-  this._secret = new sjcl.ecc.ecdsa.secretKey(sjcl.ecc.curves.k256, j);
-  return this;
-};
-
-/**
- * @private
- *
- * @return {sjcl.ecc.ecdsa.publicKey} public key
- */
-KeyPair.prototype._pub = function() {
-  var curve = this._curve;
-
-  if (!this._pubkey && this._secret) {
-    var exponent = this._secret._exponent;
-
-    this._pubkey = new sjcl.ecc.ecdsa.publicKey(curve, curve.G.mult(exponent));
-  }
-
-  return this._pubkey;
-};
-
-/**
- * @private
- *
- * @return {sjcl.bitArray} public key bits in compressed form
- */
-KeyPair.prototype._pub_bits = function() {
-  var pub = this._pub();
-
-  if (!pub) {
-    return null;
-  }
-
-  var point = pub._point, y_even = point.y.mod(2).equals(0);
-
-  return sjcl.bitArray.concat(
-    [sjcl.bitArray.partial(8, y_even ? 0x02 : 0x03)],
-    point.x.toBits(this._curve.r.bitLength())
-  );
-};
-
-/**
- * @return {String} public key bytes in compressed form, hex encoded.
- */
-KeyPair.prototype.to_hex_pub = function() {
-  var bits = this._pub_bits();
-
-  if (!bits) {
-    return null;
-  }
-
-  return sjcl.codec.hex.fromBits(bits).toUpperCase();
-};
-
-function sha256_ripemd160(bits) {
-  return sjcl.hash.ripemd160.hash(sjcl.hash.sha256.hash(bits));
-}
-
-KeyPair.prototype.get_address = function() {
-  var bits = this._pub_bits();
-
-  if (!bits) {
-    return null;
-  }
-
-  var hash = sha256_ripemd160(bits);
-
-  var address = UInt160.from_bits(hash);
-  address.set_version(Base.VER_ACCOUNT_ID);
-  return address;
-};
-
-KeyPair.prototype.sign = function(hash) {
-  var PARANOIA_256_BITS = 6; // sjcl constant for ensuring 256 bits of entropy
-  hash = UInt256.from_json(hash);
-  var sig = this._secret.sign(hash.to_bits(), PARANOIA_256_BITS);
-  sig = this._secret.canonicalizeSignature(sig);
-  return this._secret.encodeDER(sig);
-};
-
-exports.KeyPair = KeyPair;
--- a/Show More
+++ b/Show More