release: 1.9.5

fix #1113 : return promise inside catch block of reconnect to propagate promise (#1418 )
build(deps): bump @types/lodash from 4.14.168 to 4.14.170 (#1427 )
2025-11-04 21:15:47 +00:00 · 2021-06-01 16:25:38 -07:00 · 2021-06-01 15:58:52 -07:00 · 2021-06-01 15:58:25 -07:00 · 2021-06-01 15:58:12 -07:00 · 2021-06-01 15:58:01 -07:00
207 changed files with 9428 additions and 4836 deletions
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -0,0 +1,13 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: monthly
+    time: "15:00"
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: jsonschema
+    versions:
+    - "> 1.2.2"
+    - "< 2"
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,67 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ develop, master ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ develop ]
+  schedule:
+    - cron: '44 5 * * 6'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'javascript' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-v10
+v12
--- a/.prettierrc
+++ b/.prettierrc
@@ -7,4 +7,4 @@
  "trailingComma": "none",
  "quoteProps": "consistent",
  "bracketSpacing": false
-  }
+}
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 language: node_js
 node_js:
-  - 8
  - 10
  - 12
  - 13
--- a/APPLICATIONS.md
+++ b/APPLICATIONS.md
@@ -10,9 +10,19 @@ These sites are independent of Ripple and have not been authorized, endorsed, sp

 Warning: Use at your own risk.

-## Data and visualizations
+## Exchanges

- **[xrp1ntel - XRP Intelligence](https://xrp1ntel.com/)**
+- **[The World Exchange](https://www.theworldexchange.net/)**
+
+  Trade, issue, and send directly on the XRP Ledger. A user interface for the XRPL's decentralized exchange.
+
+- **[Bitso](https://bitso.com/)**
+
+  Exchange allowing clients to buy and sell XRP, based in Mexico.
+
+## Explorers
+
+- **[xrpintel - XRP Intelligence](https://xrpintel.com/)**

  Monitor the XRP Network in real time and explore historical statistics.

@@ -32,6 +42,10 @@ Warning: Use at your own risk.

  Real-time XRP price, trades, and orderbook data from the XRP Ledger.

+- **[Bithomp - XRP Explorer](https://bithomp.com/explorer/)**
+
+  Look up information by entering an address, transaction hash, username, or PayID.
+
 - **[Bithomp - XRPL validators](https://bithomp.com/validators)**

  List of XRPL validators, nodes, and testnet validators.
@@ -39,27 +53,35 @@ Warning: Use at your own risk.
 - **[XRP Scan - XRP Ledger explorer](https://xrpscan.com)**

  XRP Ledger explorer, metrics and analytics.
+  
+- **[xrplorer](https://xrplorer.com)**

-## Send and request payments
+  XRP Ledger explorer, API, metrics, and analytics using a graph database that is synchronized live with the XRPL.

- **[XRP Tip Bot](https://www.xrptipbot.com/)**
+## Data monitoring

-  A bot that enables users on reddit, Twitter and Discord to send XRP to each other through reddit comments and Twitter tweets.
+- **[zerptracker](https://zerptracker.com)**

- **[XRP Text](https://xrptext.com/)**
+  Monitor the XRPL using powerful JSONPath expressions, and receive notifications via email, SMS, webhooks, and more.

-  Send XRP using SMS text messages.
+- **[Utility-Scan](https://utility-scan.com)**

- **[XRParrot](https://xrparrot.com/)** (uses `ripple-address-codec`)
+  Attempts to detect RippleNet on-demand liquidity (ODL) transactions through known fiat corridors and report these transactions in real time.

-  Easy EUR (SEPA) to XRP transfer (currency conversion).
+- **[XRPL Rosetta](https://xrpl-rosetta-oepox.ondigitalocean.app)**

- **[XRP Payment](https://xrpayments.co/)** (xrpayments.co)
-
-  Tool for generating a XRP payment request URI in a QR code, with currency converter.
+  3D Globe written in three.js connected to a Node.js websocket server that is listening to exchanges and the XRPL. The visualization aims to show trading, ODL, and liquidity at exchanges, intra-exchange volume, and flows.

 ## Wallets and wallet tools

+- **[XUMM](https://xumm.app/)**
+
+  Users can use the xumm application to track their accounts, balances and transactions. The true power of xumm is the platform available for developers.
+
+- **[Xpring Wallet](https://xpring.io)** (uses `ripple-keypairs`)
+
+  Non-custodial XRP wallet.
+
 - **[XRP Toolkit](https://www.xrptoolkit.com)**

  A web interface to the XRP Ledger, supporting both hardware and software wallets.
@@ -88,11 +110,29 @@ Warning: Use at your own risk.

  Recover a 24 word mnemonic if one word is wrong or one word is missing.

+## Send and request payments
+
+- **[XRP Tip Bot](https://www.xrptipbot.com/)**
+
+  A bot that enables users on reddit, Twitter and Discord to send XRP to each other through reddit comments and Twitter tweets.
+
+- **[XRP Text](https://xrptext.com/)**
+
+  Send XRP using SMS text messages.
+
+- **[XRParrot](https://xrparrot.com/)** (uses `ripple-address-codec`)
+
+  Easy EUR (SEPA) to XRP transfer (currency conversion).
+
+- **[XRP Payment](https://xrpayments.co/)** (xrpayments.co)
+
+  Tool for generating a XRP payment request URI in a QR code, with currency converter.
+
 ## Development tools

- **[XRP Test Net Faucet](https://developers.ripple.com/xrp-test-net-faucet.html)**
+- **[XRP Faucets for Testnet and Devnet](https://xrpl.org/xrp-testnet-faucet.html)**

-  Get some test funds for development on the test network. The faucet was built using `ripple-lib`.
+  Get some test funds for development on the test network. The faucet uses `ripple-lib`.

 ## Code samples and libraries

@@ -121,7 +161,3 @@ Warning: Use at your own risk.
 - **[XRP Stats](https://ledger.exposed/)** (ledger.exposed)

  Rich list, live ledger stats and XRP distribution. Visualize escrows and flow of funds.
-
- **[XRP Vanity](https://xrpvanity.com/)** (xrpvanity.com)
-
-  Custom XRP addresses for sale, delivered by SetRegularKey.
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,268 @@
 # ripple-lib Release History

+Subscribe to [the **ripple-lib-announce** mailing list](https://groups.google.com/forum/#!forum/ripple-lib-announce) for release announcements. We recommend that ripple-lib users stay up-to-date with the latest stable release.
+
+## 1.9.5 (2021-06-01)
+
+* Bug fixes
+  * Prevent getFee from returning NaN from Reporting Mode (#1401) (#1398)
+  * Return promise inside catch block of reconnect to propagate promise (#1418) (#1113) (thanks @camposfyi)
+  * Internal
+    * Update mocha to use RC file config (#1417) (#1210) (thanks @camposfyi)
+* Dependencies
+  * @types/ws, ws, browserslist, @types/lodash
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 build/*
+fcdc4aa1e1df7cb788b68f3d036e168aa64f9e818f441b99fef62d4571c0387d  build/ripple-latest-min.js
+fc17a5572001d814ea6b81aa701fcb66882ec031c68afb769a8ea8b71c6529a6  build/ripple-latest-min.js.LICENSE.txt
+dfb7a92c4156fb3ee367254b5ea0935cda741cd3b5c36cdca695e7d89f88605e  build/ripple-latest.js
+```
+
+## 1.9.4 (2021-04-18)
+
+* Add memos support for all transaction types for getTransactions (#1353, #1397)
+* Add Deno and React instructions (#1387)
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 build/*
+daa2b892a18037e89fea6fcf7de67624a782971956cb8df17cd765a4b0201ee9  build/ripple-latest-min.js
+fc17a5572001d814ea6b81aa701fcb66882ec031c68afb769a8ea8b71c6529a6  build/ripple-latest-min.js.LICENSE.txt
+b1d0bab54c6dbc76091610ede54a4269e73dea8cc6a9c25738d62bd7671920e4  build/ripple-latest.js
+```
+
+## 1.9.3 (2021-03-16)
+
+* Expose ripple-address-codec methods. These are static methods on RippleAPI, so you do not need to create a RippleAPI instance.
+  * `classicAddressToXAddress` / `xAddressToClassicAddress`
+  * `isValidXAddress` / `isValidClassicAddress`
+  * `encodeSeed` / `decodeSeed`
+  * `encodeAccountID` / `decodeAccountID`
+  * `encodeNodePublic` / `decodeNodePublic`
+  * `encodeAccountPublic` / `decodeAccountPublic`
+  * `encodeXAddress` / `decodeXAddress`
+
+Example 1. Encode an X-address with tag 4294967295:
+```js
+const RippleAPI = require('ripple-lib').RippleAPI
+const xAddress = RippleAPI.classicAddressToXAddress('rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf', 4294967295)
+console.log(xAddress)
+```
+
+Output for Example 1:
+```
+XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi
+```
+
+Example 2. Encode a test address for use with Testnet or Devnet:
+```js
+const RippleAPI = require('ripple-lib').RippleAPI
+const address = RippleAPI.classicAddressToXAddress('r3SVzk8ApofDJuVBPKdmbbLjWGCCXpBQ2g', 123, true)
+console.log(address)
+```
+
+Output for Example 2:
+```
+T7oKJ3q7s94kDH6tpkBowhetT1JKfcfdSCmAXbS75iATyLD
+```
+
+Example 3. Decode an X-address:
+```js
+const RippleAPI = require('ripple-lib').RippleAPI
+const address = RippleAPI.xAddressToClassicAddress('XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi')
+console.log(address)
+```
+
+Output for Example 3:
+```js
+{
+  classicAddress: 'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+  tag: 4294967295,
+  test: false
+}
+```
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 build/*
+bcc8db4e5464197151a267d9f240693794bf1eb4d26a4e0b3637f82a1d66e440  build/ripple-latest-min.js
+fc17a5572001d814ea6b81aa701fcb66882ec031c68afb769a8ea8b71c6529a6  build/ripple-latest-min.js.LICENSE.txt
+99c2825685d249c074abe7b59abaf197afce67ece7ad08ded6db67185e916dd2  build/ripple-latest.js
+```
+
+## 1.9.2 (2021-03-12)
+
+* Docs
+  * Add missing transaction type links (#1378)
+* Bug fixes
+  * Deserialization and verification of payment paths (#1382) (#1347) (#1376)
+* Dependencies
+  * Bump ripple-binary-codec to 1.1.2
+    * Fix edge case when constructing a value from "0", which can occur when using rippled v1.7.0
+  * Bump lodash, ripple-address-codec
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 build/*
+a1fd24b65d81ea5dbc36d74da7a6317267a048bba084effff5380d47299c3c63  build/ripple-latest-min.js
+fc17a5572001d814ea6b81aa701fcb66882ec031c68afb769a8ea8b71c6529a6  build/ripple-latest-min.js.LICENSE.txt
+410f78105c4f23c13671ec94f963ef47179393bfcad65ff610bc838c5a3c6a65  build/ripple-latest.js
+```
+
+## 1.9.1 (2021-02-25)
+
+* Docs
+  * Add transaction specifications: (#1352)
+    * Ticket Create
+    * Account Delete
+    * Deposit Preauth
+  * Update link to subscribe page (#1354)
+* Bug fixes
+  * Allow connectionTimeout option to be customized (#1355)
+* Dependencies
+  * Bump ripple-keypairs to 1.0.3
+  * Bump elliptic to 6.5.4 (this patches a potential security issue, although we do not believe that the issue affects ripple-lib: [details](https://github.com/ripple/ripple-keypairs/security/advisories/GHSA-w6x3-9ph2-7x54))
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 build/*
+f59e0221a7218460eea59b0441a0ee2d2a14484dd473ed5373283852798516c7  build/ripple-latest-min.js
+fc17a5572001d814ea6b81aa701fcb66882ec031c68afb769a8ea8b71c6529a6  build/ripple-latest-min.js.LICENSE.txt
+731ed44cbff8db26bcf256e0e3f3ac3fe90a10b6c227701d67918a5d643c5b29  build/ripple-latest.js
+```
+
+## 1.9.0 (2020-12-07)
+
+* New features
+  * Support for tickets (TicketBatch amendment required - not yet activated on live/main network)
+    * `prepareTicketCreate`
+  * Types: Add LedgerClosedEvent and export more types
+* Docs
+  * Improve descriptions of get-ledger response time fields
+  * Applications
+    * Add Bithomp explorer
+    * Add example of reliable transaction submission
+* Node.js
+  * Require Node.js version 10.13.0+
+* Internal
+  * Update webpack, webpack-cli, mocha, nyc, ripple-binary-codec
+  * Run prettier to format code
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 build/*
+2d3ae057ad637df272f98cfe940ea9e1317588e5bbf4fee47c8b16d6e6e71d85  build/ripple-latest-min.js
+8cbbc7bb482f68bcc8d411bae2e42effdb14ddfa562fcbc329a373910b85cf8c  build/ripple-latest.js
+```
+
+## 1.8.2 (2020-10-23)
+
+* Bug fixes
+  * Browser compatibility: Use ripple-binary-codec 0.2.x to prevent browser issues (#1321)
+  * Memory leak: Clear awaiting response promises to prevent memory leak (#1302)
+* Feature: getSettings() - allow ledgerVersion to be 'validated', 'closed', or 'current' (#1298)
+* Docs: Update APPLICATIONS.md
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 *
+ba760c36028b8a3ce267386e188a422890dfb1b03bc87c852a4c2034ea9bac2e  ripple-latest-min.js
+7e5281eb9623602284b9f11564f0f3a36cfde305f2c2f7a32e0d29a04913c817  ripple-latest.js
+```
+
+## 1.8.1 (2020-09-25)
+
+* Internal
+  * Bump elliptic to 6.5.3 (this patches a potential security issue, although we do not believe that the issue affects ripple-lib)
+  * Bump ripple-binary-codec to 1.0.2
+  * Bump lodash to 4.17.19
+
+The SHA-256 checksums for the browser version of this release can be found below.
+```
+% shasum -a 256 *
+0895f349944fa11bb1976b2c350c0eb143dfd09abbfc7c2be33aed5c2a4b9ee8  ripple-latest-min.js
+7c00188a28f9d295d8e66aa08b340294d2fe49f635d154fb0df049ae8572c195  ripple-latest.js
+```
+
+## 1.8.0 (2020-07-06)
+
+* [Document `request('submit', ...)` method](https://github.com/ripple/ripple-lib/blob/develop/docs/index.md#submit), which includes additional useful information in the response
+* Update [list of applications using ripple-lib](https://github.com/ripple/ripple-lib/blob/1.7.0/APPLICATIONS.md)
+
+## 1.7.1 (2020-05-26)
+
+* Fix preparePayment when using source.amount/destination.minAmount (#1295) (Fix #1237) (Thanks to @leobel)
+* Docs
+  * Fix generateXAddress example (#1286)
+  * Update Transaction Streams link (#1278)
+* Dependencies
+  * Update assert-diff, mocha, webpack-bundle-analyzer, @typescript-eslint/parser, @typescript-eslint/eslint-plugin, @types/ws, @types/node, ws, ts-node, eventemitter2
+
+## 1.7.0 (2020-04-28)
+
+* Export hashing functions (#1275)
+* Add failHard (fail_hard) option in `submit` method (#1029)
+* Add type for parseAccountFlags (#1258)
+* Add api.connection.getReserveBase() (#1259)
+* Travis: remove node 8 (#1257)
+* Dependencies
+  * Update ripple-address-codec, @types/ws, @types/lodash, https-proxy-agent
+  * Update devDependencies: eventemitter2, nyc, ejs, @types/node, webpack, ts-node, prettier, @typescript-eslint/eslint-plugin
+
+## 1.6.5 (2020-03-23)
+
+* APPLICATIONS.md: Add xrplorer.com
+* Internal: Fix typos
+* Dependencies
+  * Update @types/ws, @types/node, @typescript-eslint/eslint-plugin, @types/mocha, webpack, typescript, mocha, assert-diff
+  * Remove mocha-junit-reporter
+
+## 1.6.4 (2020-02-18)
+
+* Fix generateXAddress() and generateAddress() with no entropy (#1211, #1209)
+* Internal
+  * Improve unit tests
+* Dependencies
+  * Update webpack-cli, @types/node, webpack, @typescript-eslint/eslint-plugin,
+    typescript, ripple-keypairs
+
+## 1.6.3 (2020-02-05)
+
+* Update ripple-keypairs to 1.0.0
+* Bug fix: Assign event listener to socket close event on open before attempting post-open logic (#1186)
+  * Protects against possible unhandled rejection in disconnect
+  * Adds the Connection `_ws.close` event listener post `_ws.open` before executing any post `_ws.open` logic, i.e. `Connection._subscribeToLedger`
+  * This prevents a reconnection error loop that occurs if `Connection._ws` is never cleaned up by the unreachable `_ws.close` event listener
+  * Also ensures that a possible disconnect() promise rejection is not unhandled if any `_ws.open` logic in `Connection.connect()` throws
+* Dependencies
+  * Update mocha-junit-reporter, @types/node, mocha, @typescript-eslint/eslint-plugin, ripple-address-codec
+
+## 1.6.2 (2020-01-17)
+
+* Bug fix: Catch possible error in reconnect() on _heartbeat(), emit reconnect error (#1179)
+* Docs: Fix whitespace
+* Dependencies
+  * Update @typescript-eslint/eslint-plugin, ts-node, @types/node, @types/ws, typescript
+
+## 1.6.1 (2020-01-14)
+
+> **Update Note:** In this release we refactored the internal connection logic of ripple-lib to improve resiliency across dropped messages and reconnects. The external interface remains the same, with zero changes to public methods/properties. However, If you experience any problems around connections, requests, and request retries, please [file an issue]( https://github.com/ripple/ripple-lib/issues/new) with the repo (and be sure to test against v1.6.0 to confirm that the problem was introduced in this version).
+
+* Documentation
+  * Document message type 'path_find' (#1121) (thanks @r0bertz)
+  * Improve documentation for address generation; functions that can be called offline; generateXAddress() (#1158, #1159, #1169) (thanks @hbergren)
+  * Add [Security Policy](https://github.com/ripple/ripple-lib/blob/develop/SECURITY.md)
+* Bug fixes
+  * Types: Fix AccountObjectsResponse structure (#1127) (thanks @you21979)
+  * In some cases, ripple-lib would fail to wait for the connection to be ready (#1119)
+* Dependencies
+  * Update docs dependencies, ejs and doctoc (#1153)
+  * Update eslint, ripple-lib-transactionparser, typescript, nyc, ws, @types/node, ripple-binary-codec, mocha, mocha-junit-reporter
+* Internal
+  * Add LedgerHistory to Connection (#1119): Moved ledger logic into its own Ledger class
+
 ## 1.6.0 (2020-01-06)

 * Add support for AccountDelete (#1120)
@@ -447,7 +710,7 @@ f28921f57a133678dcb3cb54c497626bd76b1f953d22d61f3ddca31c8947d552  ripple-1.1.0-m
 The SHA-256 checksums for the browser version of this release can be found
 below.
 ```
-% shasum -a 256 * 
+% shasum -a 256 *
 2556fe17296e127ed44e7066e90a6175e2b164f00ca3c1aa7b1c554f31c688dd  ripple-1.0.2-debug.js
 e0342ea21eac32a1024c62034fba09c6f26dd3e7371b23ea1e153e03135cd590  ripple-1.0.2-min.js
 c7286c517497d018d02d09257e81172b61d36c8b9885a077af68e8133c3b3b9b  ripple-1.0.2.js
--- a/README.md
+++ b/README.md
@@ -6,7 +6,13 @@ A JavaScript/TypeScript API for interacting with the XRP Ledger

 This is the recommended library for integrating a JavaScript/TypeScript app with the XRP Ledger, especially if you intend to use advanced functionality such as IOUs, payment paths, the decentralized exchange, account settings, payment channels, escrows, multi-signing, and more.

-**What is ripple-lib used for?** Here's a [list of applications](APPLICATIONS.md) that use `ripple-lib`. Open a PR to add your app or project to the list!
+## [➡️ Reference Documentation](https://xrpl.org/rippleapi-reference.html)
+
+See the full reference documentation on the XRP Ledger Dev Portal.
+
+## [➡️ Applications and Projects](APPLICATIONS.md)
+
+What is ripple-lib used for? The applications on the list linked above use `ripple-lib`. Open a PR to add your app or project to the list!

 ### Features

@@ -18,16 +24,80 @@ This is the recommended library for integrating a JavaScript/TypeScript app with

 ### Requirements

-+ **[Node v10](https://nodejs.org/)** is recommended. Other versions may work but are not frequently tested.
+ **[Node.js v14](https://nodejs.org/)** is recommended. Other versions may work but are not frequently tested.
 + **[Yarn](https://yarnpkg.com/)** is recommended. `npm` may work but we use `yarn.lock`.

-### Install
+## Getting Started
+
+See also: [RippleAPI Beginners Guide](https://xrpl.org/get-started-with-rippleapi-for-javascript.html)

 In an existing project (with `package.json`), install `ripple-lib`:
 ```
 $ yarn add ripple-lib
 ```

+Then see the [documentation](#documentation).
+
+### Using ripple-lib with React Native
+
+If you want to use `ripple-lib` with React Native you will need to have some of the NodeJS modules available. To help with this you can use a module like [rn-nodeify](https://github.com/tradle/rn-nodeify).
+
+1. Install dependencies (you can use `npm` as well):
+
+    ```shell
+    yarn add react-native-crypto
+    yarn add ripple-lib 
+    # install peer deps
+    yarn add react-native-randombytes
+    # install latest rn-nodeify
+    yarn add rn-nodeify@latest --dev
+    ```
+
+2. After that, run the following command:
+
+    ```shell
+    # install node core shims and recursively hack package.json files
+    # in ./node_modules to add/update the "browser"/"react-native" field with relevant mappings
+    ./node_modules/.bin/rn-nodeify --hack --install
+    ```
+
+3. Enable `crypto`:
+
+    `rn-nodeify` will create a `shim.js` file in the project root directory.
+    Open it and uncomment the line that requires the crypto module:
+
+    ```javascript
+    // If using the crypto shim, uncomment the following line to ensure
+    // crypto is loaded first, so it can populate global.crypto
+    require('crypto')
+    ```
+
+4. Import `shim` in your project (it must be the first line):
+
+  ```javascript
+  import './shim'
+  ...
+  ```
+
+### Using ripple-lib with Deno
+
+Until official support for [Deno](https://deno.land) is added, you can use the following work-around to use `ripple-lib` with Deno:
+
+```javascript
+import ripple from 'https://dev.jspm.io/npm:ripple-lib';
+
+(async () => {
+  const api = new (ripple as any).RippleAPI({ server: 'wss://s.altnet.rippletest.net:51233' });
+  const address = 'rH8NxV12EuV...khfJ5uw9kT';
+
+  api.connect().then(() => {
+    api.getBalances(address).then((balances: any) => {
+      console.log(JSON.stringify(balances, null, 2));
+    });
+  });
+})();
+```
+
 ## Documentation

 + [RippleAPI Beginners Guide](https://xrpl.org/get-started-with-rippleapi-for-javascript.html)
@@ -67,7 +137,7 @@ For details, see the `scripts` in `package.json`.

 ### Linting

-Run `yarn lint` to lint the code with `tslint`.
+Run `yarn lint` to lint the code with `eslint`.

 ## Generating Documentation

--- a/SECURITY.md
+++ b/SECURITY.md
@@ -0,0 +1,29 @@
+# Security Policy
+
+## Supported Versions
+
+This table shows which versions of ripple-lib are currently supported with security updates:
+
+| Version | Supported              |
+| ------- | ---------------------- |
+| 1.x     | :white_check_mark: Yes |
+| 0.x     | :x:                No  |
+
+## Responsible disclosure security policy
+
+The responsible disclosure of vulnerabilities helps to protect users of the project. Vulnerabilities are first triaged in a private manner, and only publicly disclosed after a reasonable time period that allows patching the vulnerability and provides an upgrade path for users.
+
+When contacting us directly via email, we will do our best to respond in a reasonable time to resolve the issue. Do not disclose the vulnerability until it has been patched and users have been given time to upgrade.
+
+We kindly ask you to refrain from malicious acts that put our users, the project, or any of the project’s team members at risk.
+
+## Reporting a security issue
+
+Security is a top priority. But no matter how much effort we put into security, there can still be vulnerabilities present.
+
+If you discover a security vulnerability, please use the following means of communications to report it to us:
+
+- Report the security issue to bugs@ripple.com
+- [Ripple Bug Bounty](https://ripple.com/bug-bounty/)
+
+Your efforts to responsibly disclose your findings are sincerely appreciated and will be taken into account to acknowledge your contributions.
--- a/docs/index.md
+++ b/docs/index.md
--- a/docs/samples/README.md
+++ b/docs/samples/README.md
@@ -1,3 +1,5 @@
 Usage:
 babel-node balances.js
+babel-node cancelall.js (requires setting address and secret in source file first)
 babel-node payment.js (requires setting address and secret in source file first)
+babel-node ticket.js (requires setting address and secret in source file first)
--- a/docs/samples/ticket.js
+++ b/docs/samples/ticket.js
@@ -0,0 +1,31 @@
+'use strict';
+const RippleAPI = require('../../src').RippleAPI; // require('ripple-lib')
+
+const address = 'INSERT ADDRESS HERE';
+const secret = 'INSERT SECRET HERE';
+
+const api = new RippleAPI({server: 'wss://s1.ripple.com:443'});
+const instructions = {
+  maxLedgerVersionOffset: 5
+};
+const numberOfTickets = 1;
+
+function quit(message) {
+  console.log(message);
+  process.exit(0);
+}
+
+function fail(message) {
+  console.error(message);
+  process.exit(1);
+}
+
+api.connect().then(() => {
+  console.log('Connected...');
+  return api.prepareTicketCreate(address, numberOfTickets, instructions).then(prepared => {
+    console.log('Ticket transaction prepared...');
+    const {signedTransaction} = api.sign(prepared.txJSON, secret);
+    console.log('Ticket transaction signed...');
+    api.submit(signedTransaction).then(quit, fail);
+  });
+}).catch(fail);
--- a/docs/src/basictypes.md.ejs
+++ b/docs/src/basictypes.md.ejs
@@ -22,7 +22,7 @@ An *X-address* encodes a hash of the account's public key, a tag, and a checksum

 ## Account Sequence Number

-Every XRP Ledger account has a *sequence number* that is used to keep transactions in order. Every transaction must have a sequence number. A transaction can only be executed if it has the next sequence number in order, of the account sending it. This prevents one transaction from executing twice and transactions executing out of order. The sequence number starts at `1` and increments for each transaction that the account makes.
+Every XRP Ledger account has a *sequence number* that is used to keep transactions in order. Every transaction must have a sequence or a ticketSequence number. A transaction can only be executed if it has the next sequence number in order, of the account sending it, or uses a previously generated ticketSequence number. This prevents one transaction from executing twice and transactions executing out of order. The sequence number starts at `1` and increments for each transaction that the account makes.

 ## Currency

--- a/docs/src/generateXAddress.md.ejs
+++ b/docs/src/generateXAddress.md.ejs
@@ -17,7 +17,7 @@ This method returns an object with the following structure:
 ### Example

 ```javascript
-return api.generateAddress();
+return api.generateXAddress();
 ```

 <%- renderFixture('responses/generate-x-address.json') %>
--- a/docs/src/index.md.ejs
+++ b/docs/src/index.md.ejs
@@ -1,69 +1,70 @@
-<% include introduction.md.ejs %>
-<% include boilerplate.md.ejs %>
-<% include offline.md.ejs %>
-<% include basictypes.md.ejs %>
-<% include transactions.md.ejs %>
-<% include specifications.md.ejs %>
-<% include rippledAPIs.md.ejs %>
-<% include request.md.ejs %>
-<% include hasNextPage.md.ejs %>
-<% include requestNextPage.md.ejs %>
+<%- include('introduction.md.ejs') %>
+<%- include('boilerplate.md.ejs') %>
+<%- include('offline.md.ejs') %>
+<%- include('basictypes.md.ejs') %>
+<%- include('transactions.md.ejs') %>
+<%- include('specifications.md.ejs') %>
+<%- include('rippledAPIs.md.ejs') %>
+<%- include('request.md.ejs') %>
+<%- include('hasNextPage.md.ejs') %>
+<%- include('requestNextPage.md.ejs') %>

-<% include staticMethods.md.ejs %>
-<% include renameCounterpartyToIssuer.md.ejs %>
-<% include formatBidsAndAsks.md.ejs %>
+<%- include('staticMethods.md.ejs') %>
+<%- include('renameCounterpartyToIssuer.md.ejs') %>
+<%- include('formatBidsAndAsks.md.ejs') %>

-<% include methods.md.ejs %>
-<% include connect.md.ejs %>
-<% include disconnect.md.ejs %>
-<% include isConnected.md.ejs %>
-<% include getServerInfo.md.ejs %>
-<% include getFee.md.ejs %>
-<% include getLedgerVersion.md.ejs %>
-<% include getTransaction.md.ejs %>
-<% include getTransactions.md.ejs %>
-<% include getTrustlines.md.ejs %>
-<% include getBalances.md.ejs %>
-<% include getBalanceSheet.md.ejs %>
-<% include getPaths.md.ejs %>
-<% include getOrders.md.ejs %>
-<% include getOrderbook.md.ejs %>
-<% include getSettings.md.ejs %>
-<% include getAccountInfo.md.ejs %>
-<% include getAccountObjects.md.ejs %>
-<% include getPaymentChannel.md.ejs %>
-<% include getLedger.md.ejs %>
-<% include parseAccountFlags.md.ejs %>
-<% include prepareTransaction.md.ejs %>
-<% include preparePayment.md.ejs %>
-<% include prepareTrustline.md.ejs %>
-<% include prepareOrder.md.ejs %>
-<% include prepareOrderCancellation.md.ejs %>
-<% include prepareSettings.md.ejs %>
-<% include prepareEscrowCreation.md.ejs %>
-<% include prepareEscrowCancellation.md.ejs %>
-<% include prepareEscrowExecution.md.ejs %>
-<% include preparePaymentChannelCreate.md.ejs %>
-<% include preparePaymentChannelClaim.md.ejs %>
-<% include preparePaymentChannelFund.md.ejs %>
-<% include prepareCheckCreate.md.ejs %>
-<% include prepareCheckCancel.md.ejs %>
-<% include prepareCheckCash.md.ejs %>
-<% include sign.md.ejs %>
-<% include combine.md.ejs %>
-<% include submit.md.ejs %>
-<% include generateXAddress.md.ejs %>
-<% include generateAddress.md.ejs %>
-<% include isValidAddress.md.ejs %>
-<% include isValidSecret.md.ejs %>
-<% include deriveKeypair.md.ejs %>
-<% include deriveAddress.md.ejs %>
-<% include signPaymentChannelClaim.md.ejs %>
-<% include verifyPaymentChannelClaim.md.ejs %>
-<% include computeLedgerHash.md.ejs %>
-<% include xrpToDropsAndDropsToXrp.md.ejs %>
-<% include iso8601ToRippleTime.md.ejs %>
-<% include rippleTimeToISO8601.md.ejs %>
-<% include txFlags.md.ejs %>
-<% include schemaValidator.md.ejs %>
-<% include events.md.ejs %>
+<%- include('methods.md.ejs') %>
+<%- include('connect.md.ejs') %>
+<%- include('disconnect.md.ejs') %>
+<%- include('isConnected.md.ejs') %>
+<%- include('getServerInfo.md.ejs') %>
+<%- include('getFee.md.ejs') %>
+<%- include('getLedgerVersion.md.ejs') %>
+<%- include('getTransaction.md.ejs') %>
+<%- include('getTransactions.md.ejs') %>
+<%- include('getTrustlines.md.ejs') %>
+<%- include('getBalances.md.ejs') %>
+<%- include('getBalanceSheet.md.ejs') %>
+<%- include('getPaths.md.ejs') %>
+<%- include('getOrders.md.ejs') %>
+<%- include('getOrderbook.md.ejs') %>
+<%- include('getSettings.md.ejs') %>
+<%- include('getAccountInfo.md.ejs') %>
+<%- include('getAccountObjects.md.ejs') %>
+<%- include('getPaymentChannel.md.ejs') %>
+<%- include('getLedger.md.ejs') %>
+<%- include('parseAccountFlags.md.ejs') %>
+<%- include('prepareTransaction.md.ejs') %>
+<%- include('preparePayment.md.ejs') %>
+<%- include('prepareTrustline.md.ejs') %>
+<%- include('prepareOrder.md.ejs') %>
+<%- include('prepareOrderCancellation.md.ejs') %>
+<%- include('prepareSettings.md.ejs') %>
+<%- include('prepareEscrowCreation.md.ejs') %>
+<%- include('prepareEscrowCancellation.md.ejs') %>
+<%- include('prepareEscrowExecution.md.ejs') %>
+<%- include('preparePaymentChannelCreate.md.ejs') %>
+<%- include('preparePaymentChannelClaim.md.ejs') %>
+<%- include('preparePaymentChannelFund.md.ejs') %>
+<%- include('prepareCheckCreate.md.ejs') %>
+<%- include('prepareCheckCancel.md.ejs') %>
+<%- include('prepareCheckCash.md.ejs') %>
+<%- include('prepareTicketCreate.md.ejs') %>
+<%- include('sign.md.ejs') %>
+<%- include('combine.md.ejs') %>
+<%- include('submit.md.ejs') %>
+<%- include('generateXAddress.md.ejs') %>
+<%- include('generateAddress.md.ejs') %>
+<%- include('isValidAddress.md.ejs') %>
+<%- include('isValidSecret.md.ejs') %>
+<%- include('deriveKeypair.md.ejs') %>
+<%- include('deriveAddress.md.ejs') %>
+<%- include('signPaymentChannelClaim.md.ejs') %>
+<%- include('verifyPaymentChannelClaim.md.ejs') %>
+<%- include('computeLedgerHash.md.ejs') %>
+<%- include('xrpToDropsAndDropsToXrp.md.ejs') %>
+<%- include('iso8601ToRippleTime.md.ejs') %>
+<%- include('rippleTimeToISO8601.md.ejs') %>
+<%- include('txFlags.md.ejs') %>
+<%- include('schemaValidator.md.ejs') %>
+<%- include('events.md.ejs') %>
--- a/docs/src/offline.md.ejs
+++ b/docs/src/offline.md.ejs
@@ -23,4 +23,5 @@ Methods that depend on the state of the XRP Ledger are unavailable in offline mo
 * [prepareEscrowExecution](#prepareescrowexecution)
 * [sign](#sign)
 * [generateAddress](#generateaddress)
+* [generateXAddress](#generatexaddress)
 * [computeLedgerHash](#computeledgerhash)
--- a/docs/src/prepareTicketCreate.md.ejs
+++ b/docs/src/prepareTicketCreate.md.ejs
@@ -0,0 +1,34 @@
+## prepareTicketCreate
+
+`prepareTicketCreate(address: string, ticketCount: number, instructions: object): Promise<object>`
+
+Prepare a ticket transaction. The prepared transaction must subsequently be [signed](#sign) and [submitted](#submit).
+
+Ticket functionality requires the [TicketBatch amendment](https://github.com/ripple/xrpl-dev-portal/issues/898). As of 2020-11-24, this amendment is not activated on the Mainnet, Testnet, or Devnet.
+
+### Parameters
+
+<%- renderSchema("input/prepare-ticket-create.json") %>
+
+### Return Value
+
+This method returns a promise that resolves with an object with the following structure:
+
+<aside class="notice">
+All "prepare*" methods have the same return type.
+</aside>
+
+<%- renderSchema("output/prepare.json") %>
+
+### Example
+
+```javascript
+const address = 'r9cZA1mLK5R5Am25ArfXFmqgNwjZgnfk59';
+return api.prepareTicketCreate(address, 2).then(prepared => {
+    /* ... */
+  }).catch(error => {
+    /* ... as with all prepare* methods, use a Promise catch block to handle errors ... */
+  })
+```
+
+<%- renderFixture("responses/prepare-ticket-create.json") %>
--- a/docs/src/rippledAPIs.md.ejs
+++ b/docs/src/rippledAPIs.md.ejs
@@ -14,7 +14,8 @@ When using rippled APIs:

 ## Listening to streams

-The `rippled` server can push updates to your client when various events happen. Refer to [Subscriptions in the `rippled` API docs](https://developers.ripple.com/subscription-methods.html) for details.
+The `rippled` server can push updates to your client when various events happen.
+Refer to [Subscriptions in the `rippled` API docs](https://xrpl.org/subscribe.html) for details.

 Note that the `streams` parameter for generic streams takes an array. For example, to subscribe to the `validations` stream, use `{ streams: [ 'validations' ] }`.

@@ -37,15 +38,16 @@ Type | Description
 `ledgerClosed` | Sent by the `ledger` stream when the consensus process declares a new fully validated ledger. The message identifies the ledger and provides some information about its contents.
 `validationReceived` | Sent by the `validations` stream when the server receives a validation message, also called a validation vote, regardless of whether the server trusts the validator.
 `manifestReceived` | Sent by the `manifests` stream when the server receives a manifest.
-`transaction` | Sent by many subscriptions including `transactions`, `transactions_proposed`, `accounts`, `accounts_proposed`, and `book` (Order Book). See [Transaction Streams](https://ripple.com/build/rippled-apis/#transaction-streams) for details.
+`transaction` | Sent by many subscriptions including `transactions`, `transactions_proposed`, `accounts`, `accounts_proposed`, and `book` (Order Book). See [Transaction Streams](https://xrpl.org/subscribe.html#transaction-streams) for details.
 `peerStatusChange` | (Admin-only) Reports a large amount of information on the activities of other `rippled` servers to which the server is connected.
+`path_find` | Asynchronous follow-up response to the currently open path\_find request. See [rippled path\_find method](https://xrpl.org/path_find.html) for details.

 To register your listener function, use `connection.on(type, handler)`.

 Here is an example of listening for transactions on given account(s):
 ```
 const account = 'rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn' // Replace with the account you want notifications for
-api.connect().then(() => { // Omit this if you are already connected
+api.connect().then(() => {

  // 'transaction' can be replaced with the relevant `type` from the table above
  api.connection.on('transaction', (event) => {
@@ -57,9 +59,7 @@ api.connect().then(() => { // Omit this if you are already connected
  api.request('subscribe', {
      accounts: [ account ]
  }).then(response => {
-      if (response.status === 'success') {
-          console.log('Successfully subscribed')
-      }
+      console.log('Successfully subscribed')
  }).catch(error => {
      // Handle `error`
  })
--- a/docs/src/specifications.md.ejs
+++ b/docs/src/specifications.md.ejs
@@ -1,145 +1,185 @@
 # Transaction Specifications

-A *transaction specification* specifies what a transaction should do. Each [Transaction Type](#transaction-types) has its own type of specification.
+A *transaction specification* specifies what a transaction should do. Each [Transaction Type](#transaction-types) has its own type of specification, which corresponds to the [native XRP Ledger transaction types](https://xrpl.org/transaction-types.html).

-## Payment
+## Account Delete

-See [Transaction Types](#transaction-types) for a description.
+Delete your account and send the remaining XRP elsewhere. (Native transaction type: [AccountDelete](https://xrpl.org/accountdelete.html))

-<%- renderSchema('specifications/payment.json') %>
+<%- renderSchema('specifications/account-delete.json') %>

-### Example
+> **Note:** To prepare an Account Delete transaction, use [`prepareTransaction()`](#preparetransaction) with the [native transaction format](https://xrpl.org/accountdelete.html).

-<%- renderFixture('requests/prepare-payment.json') %>
+## Check Cancel

-## Trustline
+Cancel a Check that has not been redeemed. (Native transaction type: [CheckCancel](https://xrpl.org/checkcancel.html))

-See [Transaction Types](#transaction-types) for a description.
+<%- renderSchema('specifications/check-cancel.json') %>

-<%- renderSchema('specifications/trustline.json') %>
+#### Example

-### Example
+<%- renderFixture('requests/prepare-check-cancel.json') %>
+
+
+## Check Cash
+
+Redeem a Check for up to its stated value. (Native transaction type: [CheckCash](https://xrpl.org/checkcash.html))
+
+<%- renderSchema('specifications/check-cash.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-check-cash-amount.json') %>
+
+
+## Check Create
+
+Create a Check, a deferred payment that can be redeemed by the destination. (Native transaction type: [CheckCreate](https://xrpl.org/checkcreate.html))
+
+<%- renderSchema('specifications/check-create.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-check-create.json') %>
+
+
+## Deposit Preauth
+
+Preauthorize an sender to deposit money at an account using [Deposit Authorization](https://xrpl.org/depositauth.html). (Native transaction type: [DepositPreauth](https://xrpl.org/depositpreauth.html))
+
+<%- renderSchema('specifications/deposit-preauth.json') %>
+
+> **Note:** To prepare a Deposit Preauth transaction, use [`prepareTransaction()`](#preparetransaction) with the [native transaction format](https://xrpl.org/depositpreauth.html).
+
+
+## Escrow Cancellation
+
+Cancel an Escrow that has passed its expiration. (Native transaction type: [EscrowCancel](https://xrpl.org/escrowcancel.html))
+
+<%- renderSchema('specifications/escrow-cancellation.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-escrow-cancellation.json') %>
+
+
+## Escrow Creation
+
+Create an Escrow that locks up XRP until a given time or condition is met. (Native transaction type: [EscrowCreate](https://xrpl.org/escrowcreate.html))
+
+<%- renderSchema('specifications/escrow-creation.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-escrow-creation.json') %>
+
+
+## Escrow Execution
+
+Deliver XRP from an Escrow after its conditions have been met. (Native transaction type: [EscrowFinish](https://xrpl.org/escrowfinish.html))
+
+<%- renderSchema('specifications/escrow-execution.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-escrow-execution.json') %>

-<%- renderFixture('requests/prepare-trustline.json') %>

 ## Order

-See [Transaction Types](#transaction-types) for a description.
+Create and execute a limit order in the decentralized exchange. (Native transaction type: [OfferCreate](https://xrpl.org/offercreate.html))

 <%- renderSchema('specifications/order.json') %>

 The following invalid flag combination causes a `ValidationError`: `immediateOrCancel` and `fillOrKill`. These fields are mutually exclusive, and cannot both be set at the same time.

-### Example
+#### Example

 <%- renderFixture('requests/prepare-order.json') %>

+
 ## Order Cancellation

-See [Transaction Types](#transaction-types) for a description.
+Cancel an order in the decentralized exchange. (Native transaction type: [OfferCancel](https://xrpl.org/offercancel.html))

 <%- renderSchema('specifications/order-cancellation.json') %>

-### Example
+#### Example

 <%- renderFixture('requests/prepare-order-cancellation.json') %>

-## Settings

-See [Transaction Types](#transaction-types) for a description.
+## Payment

-<%- renderSchema('output/get-settings.json') %>
+Send value from one account to another. (Native transaction type: [Payment](https://xrpl.org/payment.html))

-### Example
+<%- renderSchema('specifications/payment.json') %>

-<%- renderFixture('requests/prepare-settings.json') %>
+#### Example

-## Escrow Creation
+<%- renderFixture('requests/prepare-payment.json') %>

-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/escrow-creation.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-escrow-creation.json') %>
-
-## Escrow Cancellation
-
-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/escrow-cancellation.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-escrow-cancellation.json') %>
-
-## Escrow Execution
-
-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/escrow-execution.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-escrow-execution.json') %>
-
-## Check Create
-
-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/check-create.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-check-create.json') %>
-
-## Check Cancel
-
-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/check-cancel.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-check-cancel.json') %>
-
-## Check Cash
-
-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/check-cash.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-check-cash-amount.json') %>
-
-## Payment Channel Create
-
-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/payment-channel-create.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-payment-channel-create.json') %>
-
-## Payment Channel Fund
-
-See [Transaction Types](#transaction-types) for a description.
-
-<%- renderSchema('specifications/payment-channel-fund.json') %>
-
-### Example
-
-<%- renderFixture('requests/prepare-payment-channel-fund.json') %>

 ## Payment Channel Claim

-See [Transaction Types](#transaction-types) for a description.
+Redeem XRP from a Payment Channel. (Native transaction type: [PaymentChannelClaim](https://xrpl.org/paymentchannelclaim.html))

 <%- renderSchema('specifications/payment-channel-claim.json') %>

-### Example
+#### Example

 <%- renderFixture('requests/prepare-payment-channel-claim.json') %>
+
+
+## Payment Channel Create
+
+Create a Payment Channel with XRP set aside for asynchronous payments. (Native transaction type: [PaymentChannelCreate](https://xrpl.org/paymentchannelcreate.html))
+
+<%- renderSchema('specifications/payment-channel-create.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-payment-channel-create.json') %>
+
+
+## Payment Channel Fund
+
+Add XRP to a Payment Channel. (Native transaction type: [PaymentChannelFund](https://xrpl.org/paymentchannelfund.html))
+
+<%- renderSchema('specifications/payment-channel-fund.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-payment-channel-fund.json') %>
+
+
+
+## Settings
+
+Change account settings. (Native transaction types: [AccountSet](https://xrpl.org/accountset.html), [SetRegularKey](https://xrpl.org/setregularkey.html), [SignerListSet](https://xrpl.org/signerlistset.html))
+
+<%- renderSchema('output/get-settings.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-settings.json') %>
+
+
+## Ticket Create
+
+Set aside account Sequence numbers as Tickets to be used by later transactions.
+
+> **Caution:** As of 2021-01-22, Tickets are not yet available on the XRP Ledger.
+
+> **Note:** To prepare a Ticket Create transaction, use [`prepareTransaction()`](#preparetransaction) with the native transaction format. <!-- Future link: https://xrpl.org/ticketcreate.html -->
+
+
+## Trustline
+
+Create or modify a trust line between two accounts, for an issued currency. (Native transaction type: [TrustSet](https://xrpl.org/trustset.html))
+
+<%- renderSchema('specifications/trustline.json') %>
+
+#### Example
+
+<%- renderFixture('requests/prepare-trustline.json') %>
--- a/docs/src/staticMethods.md.ejs
+++ b/docs/src/staticMethods.md.ejs
@@ -1 +1,100 @@
 # Static Methods
+
+You can access static methods directly on the `RippleAPI` class. For example, `RippleAPI.computeBinaryTransactionHash(...)`.
+
+A few of the most commonly-used methods are documented below.
+
+For a full list, refer to these docs:
+
+- [XRP Ledger Hashes](https://github.com/ripple/ripple-lib/blob/develop/src/common/hashes/README.md)
+- [ripple-address-codec API](https://github.com/ripple/ripple-address-codec/blob/master/README.md#api)
+
+## computeBinaryTransactionHash
+
+`computeBinaryTransactionHash(txBlobHex: string): string`
+
+Returns the hash (id) of a binary transaction blob.
+
+This is a static method on the `RippleAPI` class.
+
+### Parameters
+
+This method takes one parameter, a string containing a binary transaction in hex.
+
+### Return Value
+
+This method returns a string representing the transaction's id (hash).
+
+### Example
+
+```javascript
+const signed_blob = '120000228000000024000B2E5A201B0066374B61400000003B9ACA0068400000000000000C732102356E89059A75438887F9FEE2056A2890DB82A68353BE9C0C0C8F89C0018B37FC74473045022100B3721EEB1ED6DFF29FB8B209E2DE6B54A0A6E44D52D926342F3D334BE98F08640220367A74107AD5DEAEFA3AB2984C161FC23F30B2704BB5CC984358BA262177A4568114F667B0CA50CC7709A220B0561B85E53A48461FA883142B71D8B09B4EE8DAA68FB936C23E3A974713BDAC'
+if (typeof signed_blob === 'string' && signed_blob.match(/^[A-F0-9]+$/)) {
+  const id = RippleAPI.computeBinaryTransactionHash(signed_blob)
+  console.log('Transaction hash:', id')
+}
+```
+
+```
+Transaction hash: 80C5E11E1A21A626759D6CB944B33DBAAC66BD704A289C86E330B847904F5C13
+```
+
+[RunKit Example: computeBinaryTransactionHash](https://runkit.com/intelliot/computebinarytransactionhash-example)
+
+## classicAddressToXAddress
+
+`classicAddressToXAddress(classicAddress: string, tag: number | false[, test: boolean]): string`
+
+Convert a classic address and tag to an X-address.
+
+If `test` is `true`, the address with start with `T` and readers of the address will know that the address is intended for use on a test network.
+
+### Example: Encode an X-address with tag 4294967295
+
+```javascript
+const RippleAPI = require('ripple-lib').RippleAPI
+const xAddress = RippleAPI.classicAddressToXAddress('rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf', 4294967295)
+console.log(xAddress)
+```
+
+```
+XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi
+```
+
+### Example: Encode a test address for use with Testnet or Devnet
+
+```javascript
+const RippleAPI = require('ripple-lib').RippleAPI
+const address = RippleAPI.classicAddressToXAddress('r3SVzk8ApofDJuVBPKdmbbLjWGCCXpBQ2g', 123, true)
+console.log(address)
+```
+
+```
+T7oKJ3q7s94kDH6tpkBowhetT1JKfcfdSCmAXbS75iATyLD
+```
+
+## xAddressToClassicAddress
+
+`xAddressToClassicAddress(xAddress: string): {classicAddress: string, tag: number | false, test: boolean}`
+
+Convert an X-address to a classic address and tag.
+
+Since `0` is a valid tag, use `if (tag !== false)` to you want to check for a tag.
+
+If the address is intended for use on a test network, `test === true`. Otherwise, `test === false`.
+
+### Example
+
+```javascript
+const RippleAPI = require('ripple-lib').RippleAPI
+const address = RippleAPI.xAddressToClassicAddress('XVLhHMPHU98es4dbozjVtdWzVrDjtV18pX8yuPT7y4xaEHi')
+console.log(address)
+```
+
+```
+{
+  classicAddress: 'rGWrZyQqhTp9Xu7G5Pkayo7bXjH4k4QYpf',
+  tag: 4294967295,
+  test: false
+}
+```
--- a/docs/src/submit.md.ejs
+++ b/docs/src/submit.md.ejs
@@ -1,25 +1,83 @@
 ## submit

-`submit(signedTransaction: string): Promise<object>`
+`request('submit', {tx_blob: string, fail_hard: boolean}): Promise<object>`

-Submits a signed transaction. The transaction is not guaranteed to succeed; it must be verified with [getTransaction](#gettransaction).
+The `submit` method applies a transaction and sends it to the network to be confirmed and included in future ledgers.
+
+This method takes a signed, serialized transaction as a binary blob, and submits it to the network as-is. Since signed transaction objects are immutable, no part of the transaction can be modified or automatically filled in after submission.
+
+To send a transaction as robustly as possible, you should construct and sign it in advance, persist it somewhere that you can access even after a power outage, then `submit` it as a `tx_blob`. After submission, monitor the network with the `tx` method to see if the transaction was successfully applied; if a restart or other problem occurs, you can safely re-submit the `tx_blob` transaction: it won't be applied twice since it has the same sequence number as the old transaction.

 ### Parameters

-<%- renderSchema('input/submit.json') %>
+| `Field`     | Type    | Description                                          |
+|:------------|:--------|:-----------------------------------------------------|
+| `tx_blob`   | String  | Hex representation of the signed transaction to submit. This can be a multi-signed transaction. |
+| `fail_hard` | Boolean | (Optional, defaults to false) If true, and the transaction fails locally, do not retry or relay the transaction to other servers |

 ### Return Value

-This method returns an object with the following structure:
+When successful, this method returns an object containing the following fields:

-<%- renderSchema('output/submit.json') %>
+| `Field`                 | Type    | Description                              |
+|:------------------------|:--------|:-----------------------------------------|
+| `engine_result`         | String  | Text [result code](https://xrpl.org/transaction-results.html) indicating the preliminary result of the transaction, for example `tesSUCCESS` |
+| `engine_result_code`    | Integer | Numeric version of the [result code](https://xrpl.org/transaction-results.html). **Not recommended.** |
+| `engine_result_message` | String  | Human-readable explanation of the transaction's preliminary result |
+| `tx_blob`               | String  | The complete transaction in hex string format |
+| `tx_json`               | Object  | The complete transaction in JSON format  |
+| `accepted`              | Boolean | The value `true` indicates that the transaction was applied, queued, broadcast, or kept for later. The value `false` indicates that none of those happened, so the transaction cannot possibly succeed as long as you do not submit it again and have not already submitted it another time. [New in: rippled 1.5.0] |
+| `account_sequence_available` | Number | The next [Sequence Number](https://xrpl.org/basic-data-types.html#account-sequence) available for the sending account after all pending and [queued](https://xrpl.org/transaction-queue.html) transactions. [New in: rippled 1.5.0] |
+| `account_sequence_next` | number  | The next [Sequence Number](https://xrpl.org/basic-data-types.html#account-sequence) for the sending account after all transactions that have been provisionally applied, but not transactions in the [queue](https://xrpl.org/transaction-queue.html). [New in: rippled 1.5.0] |
+| `applied`               | Boolean | The value `true` indicates that this transaction was applied to the open ledger. In this case, the transaction is likely, but not guaranteed, to be validated in the next ledger version. [New in: rippled 1.5.0] |
+| `broadcast`             | Boolean | The value `true` indicates this transaction was broadcast to peer servers in the peer-to-peer XRP Ledger network. (Note: if the server has no peers, such as in [stand-alone mode](https://xrpl.org/rippled-server-modes.html#reasons-to-run-a-rippled-server-in-stand-alone-mode), the server uses the value `true` for cases where it _would_ have broadcast the transaction.) The value `false` indicates the transaction was not broadcast to any other servers. [New in: rippled 1.5.0] |
+| `kept`                  | Boolean | The value `true` indicates that the transaction was kept to be retried later. [New in: rippled 1.5.0] |
+| `queued`                | Boolean | The value `true` indicates the transaction was put in the [Transaction Queue](https://xrpl.org/transaction-queue.html), which means it is likely to be included in a future ledger version. [New in: rippled 1.5.0] |
+| `open_ledger_cost`      | String  | The current [open ledger cost](https://xrpl.org/transaction-cost.html#open-ledger-cost) before processing this transaction. Transactions with a lower cost are likely to be [queued](https://xrpl.org/transaction-queue.html). [New in: rippled 1.5.0] |
+| `validated_ledger_index` | Integer  | The [ledger index](https://xrpl.org/basic-data-types.html#ledger-index) of the newest validated ledger at the time of submission. This provides a lower bound on the ledger versions that the transaction can appear in as a result of this request. (The transaction could only have been validated in this ledger version or earlier if it had already been submitted before.) |
+
+Note: Many situations can prevent a transaction from processing successfully, such as a lack of trust lines connecting the two accounts in a payment, or changes in the state of the ledger since the time the transaction was constructed. Even if nothing is wrong, it may take several seconds to close and validate the ledger version that includes the transaction. Do not consider the transaction's results final until they appear in a validated ledger version.

 ### Example

 ```javascript
-const signedTransaction = '12000322800000002400000017201B0086955368400000000000000C732102F89EAEC7667B30F33D0687BBA86C3FE2A08CCA40A9186C5BDE2DAA6FA97A37D874473045022100BDE09A1F6670403F341C21A77CF35BA47E45CDE974096E1AA5FC39811D8269E702203D60291B9A27F1DCABA9CF5DED307B4F23223E0B6F156991DB601DFB9C41CE1C770A726970706C652E636F6D81145E7B112523F68D2F5E879DB4EAC51C6698A69304';
-return api.submit(signedTransaction)
-  .then(result => {/* ... */});
+const signedTransaction = '12000022800000002400000007201B007008BC61400000000754D4C068400000000000000C732103E8110048477E60F292DEDA67CF518511E70A15E1E3771B3C024026E1F824832874473045022100D659C836C24FF346A87054E463078D805B19EFE9F10348FD4C6ED6C3F3C4D750022060BE0BFD5E2C4963A1B0E0F21D5BA800969863BA486F71E75C08D76D77C45B22811492F80A3F3849DBB5714A4F2C691CE7D47BEED58083141266204CFBC657E65D9B4D30301FF98644693935';
+const failHard = false;
+const result = await api.request('submit', {
+  tx_blob: signedTransaction,
+  fail_hard: failHard // optional
+});
 ```

-<%- renderFixture('responses/submit.json') %>
+```json
+{
+  "accepted": true,
+  "account_sequence_available": 8,
+  "account_sequence_next": 8,
+  "applied": true,
+  "broadcast": true,
+  "engine_result": "tesSUCCESS",
+  "engine_result_code": 0,
+  "engine_result_message": "The transaction was applied. Only final in a validated ledger.",
+  "kept": true,
+  "open_ledger_cost": "10",
+  "queued": false,
+  "tx_blob": "12000022800000002400000007201B007008BC61400000000754D4C068400000000000000C732103E8110048477E60F292DEDA67CF518511E70A15E1E3771B3C024026E1F824832874473045022100D659C836C24FF346A87054E463078D805B19EFE9F10348FD4C6ED6C3F3C4D750022060BE0BFD5E2C4963A1B0E0F21D5BA800969863BA486F71E75C08D76D77C45B22811492F80A3F3849DBB5714A4F2C691CE7D47BEED58083141266204CFBC657E65D9B4D30301FF98644693935",
+  "tx_json": {
+      "Account": "rNQao3Z1irwRjKWSs8heL4a8WKLPKfLrXs",
+      "Amount": "123000000",
+      "Destination": "rpgHWJdXkSvvzikdJCpuMzU7zWnuqsJRCZ",
+      "Fee": "12",
+      "Flags": 2147483648,
+      "LastLedgerSequence": 7342268,
+      "Sequence": 7,
+      "SigningPubKey": "03E8110048477E60F292DEDA67CF518511E70A15E1E3771B3C024026E1F8248328",
+      "TransactionType": "Payment",
+      "TxnSignature": "3045022100D659C836C24FF346A87054E463078D805B19EFE9F10348FD4C6ED6C3F3C4D750022060BE0BFD5E2C4963A1B0E0F21D5BA800969863BA486F71E75C08D76D77C45B22",
+      "hash": "FE8D68D7FF5805EB07AF15A1ADF07FB5463CCD2C6C0A15981EB3D26A02E1551C"
+  },
+  "validated_ledger_index": 7341775
+}
+```
+
+(In ripple-lib 1.8.0, [the old `submit` method](https://github.com/ripple/ripple-lib/blob/1.7.0/docs/index.md#submit) was deprecated.)
--- a/docs/src/transactions.md.ejs
+++ b/docs/src/transactions.md.ejs
@@ -9,7 +9,7 @@ Type | Description
 [payment](#payment) | A `payment` transaction represents a transfer of value from one account to another. Depending on the [path](https://ripple.com/build/paths/) taken, additional exchanges of value may occur atomically to facilitate the payment.
 [order](#order) | An `order` transaction creates a limit order. It defines an intent to exchange currencies, and creates an order in the XRP Ledger's order book if not completely fulfilled when placed. Orders can be partially fulfilled.
 [orderCancellation](#order-cancellation) | An `orderCancellation` transaction cancels an order in the XRP Ledger's order book.
-[trustline](#trustline) | A `trustline` transactions creates or modifies a trust line between two accounts.
+[trustline](#trustline) | A `trustline` transaction creates or modifies a trust line between two accounts.
 [settings](#settings) | A `settings` transaction modifies the settings of an account in the XRP Ledger.
 [escrowCreation](#escrow-creation) | An `escrowCreation` transaction creates an escrow on the ledger, which locks XRP until a cryptographic condition is met or it expires. It is like an escrow service where the XRP Ledger acts as the escrow agent.
 [escrowCancellation](#escrow-cancellation) | An `escrowCancellation` transaction unlocks the funds in an escrow and sends them back to the creator of the escrow, but it will only work after the escrow expires.
@@ -20,6 +20,7 @@ Type | Description
 [paymentChannelCreate](#payment-channel-create) | A `paymentChannelCreate` transaction opens a payment channel between two addresses with XRP set aside for asynchronous payments.
 [paymentChannelFund](#payment-channel-fund) | A `paymentChannelFund` transaction adds XRP to a payment channel and optionally sets a new expiration for the channel.
 [paymentChannelClaim](#payment-channel-claim) | A `paymentChannelClaim` transaction withdraws XRP from a channel and optionally requests to close it.
+[ticketCreate](#ticket-create) | A successful `ticketCreate` transaction adds a Ticket in the directory of the owning account.

 ## Transaction Flow

@@ -37,6 +38,7 @@ Executing a transaction with `RippleAPI` requires the following four steps:
    * [prepareCheckCreate](#preparecheckcreate)
    * [prepareCheckCancel](#preparecheckcancel)
    * [prepareCheckCash](#preparecheckcash)
+    * [prepareTicketCreate](#prepareticketcreate)
 2. [Sign](#sign) - Cryptographically sign the transaction locally and save the [transaction ID](#transaction-id). Signing is how the owner of an account authorizes a transaction to take place. For multisignature transactions, the `signedTransaction` fields returned by `sign` must be collected and passed to the [combine](#combine) method.
 3. [Submit](#submit) - Submit the transaction to the connected server.
 4. Verify - Verify that the transaction got validated by querying with [getTransaction](#gettransaction). This is necessary because transactions may fail even if they were successfully submitted.
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "ripple-lib",
-  "version": "1.6.0",
+  "version": "1.9.5",
  "license": "ISC",
  "description": "A TypeScript/JavaScript API for interacting with the XRP Ledger in Node.js and the browser",
  "files": [
@@ -21,38 +21,46 @@
  },
  "dependencies": {
    "@types/lodash": "^4.14.136",
-    "@types/ws": "^6.0.3",
+    "@types/ws": "^7.2.0",
    "bignumber.js": "^9.0.0",
-    "https-proxy-agent": "^4.0.0",
+    "https-proxy-agent": "^5.0.0",
    "jsonschema": "1.2.2",
    "lodash": "^4.17.4",
    "lodash.isequal": "^4.5.0",
-    "ripple-address-codec": "^4.0.0",
-    "ripple-binary-codec": "^0.2.5",
-    "ripple-keypairs": "^0.11.0",
-    "ripple-lib-transactionparser": "0.8.1",
+    "ripple-address-codec": "^4.1.1",
+    "ripple-binary-codec": "^1.1.2",
+    "ripple-keypairs": "^1.0.3",
+    "ripple-lib-transactionparser": "0.8.2",
    "ws": "^7.2.0"
  },
+  "resolutions": {
+    "elliptic": "^6.5.4"
+  },
  "devDependencies": {
-    "@types/mocha": "^5.2.7",
-    "@types/node": "^13.1.1",
+    "@types/mocha": "^8.2.1",
+    "@types/node": "^15.0.1",
    "@typescript-eslint/eslint-plugin": "^2.3.3",
-    "@typescript-eslint/parser": "^2.3.3",
-    "assert-diff": "^2.0.3",
-    "doctoc": "^0.15.0",
-    "ejs": "^2.3.4",
+    "@typescript-eslint/parser": "^2.27.0",
+    "assert": "^2.0.0",
+    "assert-diff": "^3.0.0",
+    "buffer": "^6.0.2",
+    "crypto-browserify": "^3.12.0",
+    "doctoc": "^2.0.0",
+    "ejs": "^3.0.1",
    "eslint": "^6.5.1",
    "eventemitter2": "^6.0.0",
    "json-schema-to-markdown-table": "^0.4.0",
-    "mocha": "6.2.2",
-    "mocha-junit-reporter": "^1.9.1",
-    "nyc": "^14.1.1",
-    "prettier": "^1.19.1",
-    "ts-node": "^8.4.1",
-    "typescript": "^3.6.4",
-    "webpack": "^4.41.2",
-    "webpack-bundle-analyzer": "^3.6.0",
-    "webpack-cli": "^3.3.9"
+    "mocha": "^7",
+    "nyc": "^15",
+    "prettier": "^2.0.5",
+    "process": "^0.11.10",
+    "stream-browserify": "^3.0.0",
+    "ts-node": "^9.1.1",
+    "typescript": "^3.7.5",
+    "url": "^0.11.0",
+    "webpack": "^5.6.0",
+    "webpack-bundle-analyzer": "^4.1.0",
+    "webpack-cli": "^4.2.0"
  },
  "scripts": {
    "build:schemas": "mkdir -p dist/npm/common && cp -r src/common/schemas dist/npm/common/",
@@ -65,12 +73,14 @@
    "doctoc": "doctoc docs/index.md --title '# RippleAPI Reference' --github --maxlevel 2",
    "docgen": "node --harmony scripts/build_docs.js",
    "prepublish": "yarn clean && yarn build",
-    "test": "TS_NODE_PROJECT=src/tsconfig.json nyc mocha --exit",
+    "test": "TS_NODE_PROJECT=src/tsconfig.json nyc mocha --config=test/.mocharc.json --exit",
    "test:watch": "TS_NODE_PROJECT=src/tsconfig.json mocha --watch --reporter dot",
    "format": "prettier --write '{src,test}/**/*.ts'",
    "lint": "eslint 'src/**/*.ts' 'test/*-test.{ts,js}'",
    "perf": "./scripts/perf_test.sh",
-    "start": "node scripts/http.js"
+    "compile:snippets": "tsc -p snippets/tsconfig.json",
+    "start:snippet": "npm run compile:snippets && node ./snippets/dist/start.js",
+    "inspect:snippet": "npm run compile:snippets && node inspect ./snippets/dist/start.js"
  },
  "repository": {
    "type": "git",
@@ -78,7 +88,7 @@
  },
  "readmeFilename": "README.md",
  "engines": {
-    "node": ">=8",
+    "node": ">=10.13.0",
    "yarn": "^1.15.2"
  }
 }
--- a/scripts/ci.sh
+++ b/scripts/ci.sh
@@ -14,7 +14,10 @@ lint() {

 unittest() {
  # test "src"
-  mocha test --reporter mocha-junit-reporter --reporter-options mochaFile=$CIRCLE_TEST_REPORTS/test-results.xml
+
+  # TODO: replace/upgrade mocha-junit-reporter
+  #mocha test --reporter mocha-junit-reporter --reporter-options mochaFile=$CIRCLE_TEST_REPORTS/test-results.xml
+
  yarn test --coverage
  #yarn run coveralls

--- a/snippets/src/decoder.ts
+++ b/snippets/src/decoder.ts
@@ -0,0 +1,9 @@
+import * as codec from 'ripple-binary-codec'
+
+const original = codec.decode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
+
+const test = codec.decode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
+
+console.log('original:', JSON.stringify(original))
+
+console.log('test:', JSON.stringify(test))
--- a/snippets/src/paths.ts
+++ b/snippets/src/paths.ts
@@ -0,0 +1,47 @@
+import {RippleAPI} from '../../dist/npm'
+
+const api = new RippleAPI({
+  // server: 'wss://s.altnet.rippletest.net:51233'
+  // server: 'ws://35.158.96.209:51233'
+  server: 'ws://34.210.87.206:51233'
+})
+
+sign()
+
+async function sign() {
+  await api.connect()
+  const pathfind: any = {
+    source: {
+      address: 'r9cZA1mLK5R5Am25ArfXFmqgNwjZgnfk59',
+      amount: {
+        currency: 'drops',
+        value: '100'
+      }
+    },
+    destination: {
+      address: 'rKT4JX4cCof6LcDYRz8o3rGRu7qxzZ2Zwj',
+      amount: {
+        currency: 'USD',
+        counterparty: 'rVnYNK9yuxBz4uP8zC8LEFokM2nqH3poc'
+      }
+    }
+  }
+
+  await api.getPaths(pathfind).then(async (data) => {
+    console.log('paths:', JSON.stringify(data))
+    const fakeSecret = 'shsWGZcmZz6YsWWmcnpfr6fLTdtFV'
+
+    pathfind.paths = data[0].paths
+    pathfind.destination = data[0].destination
+    await api.preparePayment('r9cZA1mLK5R5Am25ArfXFmqgNwjZgnfk59', pathfind).then(ret => {
+      const signed = api.sign(ret.txJSON, fakeSecret)
+      console.log('signed:', signed)
+    }).catch(err => {
+        console.log('ERR 1:', JSON.stringify(err))
+    })
+  }).catch(err => {
+      console.log('ERR 2:', err)
+  })
+
+  api.disconnect()
+}
--- a/snippets/src/reliableTransactionSubmission.ts
+++ b/snippets/src/reliableTransactionSubmission.ts
@@ -0,0 +1,200 @@
+import {
+  RippleAPI,
+  AccountInfoResponse,
+  LedgerClosedEvent
+} from '../../dist/npm'
+import https = require('https')
+
+/**
+ * When implementing Reliable Transaction Submission, there are many potential solutions, each with different trade-offs. The main decision points are:
+ * 1) Transaction preparation:
+ *    - How do we decide which account sequence and LastLedgerSequence numbers to use?
+ *      (To prevent unintentional duplicate transactions, an {account, account_sequence} pair can be used as a transaction's idempotency key)
+ *    - How do we decide how much to pay for the transaction fee? (If our transactions have been failing due to low fee, we should consider increasing this value)
+ * 2) Transaction status retrieval. Options include:
+ *    - Poll for transaction status:
+ *      - On a regular interval (e.g. every 3-5 seconds), or
+ *      - When a new validated ledger is detected
+ *      + (To accommodate an edge case in transaction retrieval, check the sending account's Sequence number to confirm that it has the expected value;
+ *         alternatively, wait until a few additional ledgers have been validated before deciding that a transaction has definitively not been included in a validated ledger)
+ *    - Listen for transaction status: scan all validated transactions to see if our transactions are among them
+ * 3) What do we do when a transaction fails? It is possible to implement retry logic, but caution is advised. Note that there are a few ways for a transaction to fail:
+ *    A) `tec`: The transaction was included in a ledger but only claimed the transaction fee
+ *    B) `tesSUCCESS` but unexpected result: The transaction was successful but did not have the expected result. This generally does not occur for XRP-to-XRP payments
+ *    C) The transaction was not, and never will be, included in a validated ledger [3C]
+ *
+ * References:
+ * - https://xrpl.org/reliable-transaction-submission.html
+ * - https://xrpl.org/send-xrp.html
+ * - https://xrpl.org/look-up-transaction-results.html
+ * - https://xrpl.org/get-started-with-rippleapi-for-javascript.html
+ * - https://xrpl.org/monitor-incoming-payments-with-websocket.html
+ *
+ * For the implementation in this example, we have made the following decisions:
+ * 1) The script will choose the account sequence and LastLedgerSequence numbers automatically. We allow ripple-lib to choose the fee.
+ *    Payments are defined upfront, and idempotency is not needed. If the script is run a second time, duplicate payments will result.
+ * 2) We will listen for notification that a new validated ledger has been found, and poll for transaction status at that time.
+ *    Futhermore, as a precaution, we will wait until the server is 3 ledgers past the transaction's LastLedgerSequence
+ *    (with the transaction nowhere to be seen) before deciding that it has definitively failed per [3C]
+ * 3) Transactions will not be automatically retried. Transactions are limited to XRP-to-XRP payments and cannot "succeed" in an unexpected way.
+ */
+reliableTransactionSubmissionExample()
+
+async function reliableTransactionSubmissionExample() {
+  /**
+   * Array of payments to execute.
+   *
+   * For brevity, these are XRP-to-XRP payments, taking a source, destination, and an amount in drops.
+   *
+   * The script will attempt to make all of these payments as quickly as possible, and report the final status of each. Transactions that fail are NOT retried.
+   */
+  const payments = []
+
+  const sourceAccount = (await generateTestnetAccount()).account
+  console.log(`Generated new Testnet account: ${sourceAccount.classicAddress}/${sourceAccount.secret}`)
+  // Send amounts from 1 drop to 10 drops
+  for (let i = 1; i <= 10; i++) {
+    payments.push({
+      source: sourceAccount,
+      destination: 'rhsoCozhUxwcyQgzFi1FVRoMVQgk7cZd4L', // Random Testnet destination
+      amount_drops: i.toString(),
+    })
+  }
+  const results = await performPayments(payments)
+  console.log(JSON.stringify(results, null, 2))
+  process.exit(0)
+}
+
+async function performPayments(payments) {
+  const finalResults = []
+  const txFinalizedPromises = []
+  const api = new RippleAPI({server: 'wss://s.altnet.rippletest.net:51233'})
+  await api.connect()
+
+  for (let i = 0; i < payments.length; i++) {
+    const payment = payments[i]
+    const account_info: AccountInfoResponse = await api.request('account_info', {
+      account: payment.source.classicAddress,
+      ledger_index: 'current'})
+    const sequence = account_info.account_data.Sequence
+    const preparedPayment = await api.preparePayment(payment.source.classicAddress, {
+      source: {
+        address: payment.source.classicAddress,
+        amount: {
+          value: payment.amount_drops,
+          currency: 'drops'
+        }
+      },
+      destination: {
+        address: payment.destination,
+        minAmount: {
+          value: payment.amount_drops,
+          currency: 'drops'
+        }
+      }
+    }, {
+      sequence
+    })
+    const signed = api.sign(preparedPayment.txJSON, payment.source.secret)
+    finalResults.push({
+      id: signed.id
+    })
+    const result = await api.submit(signed.signedTransaction)
+
+    // Most of the time we'll get 'tesSUCCESS' or (after many submissions) 'terQUEUED'
+    console.log(`tx ${i} - tentative: ${result.resultCode}`)
+
+    const txFinalizedPromise = new Promise((resolve) => {
+      const ledgerClosedCallback = async (event: LedgerClosedEvent) => {
+        let status
+        try {
+          status = await api.getTransaction(signed.id)
+        } catch (e) {
+          // Typical error when the tx hasn't been validated yet:
+          if (e.name !== 'MissingLedgerHistoryError') {
+            console.log(e)
+          }
+
+          if (event.ledger_index > preparedPayment.instructions.maxLedgerVersion + 3) {
+            // Assumptions:
+            // - We are still connected to the same rippled server
+            // - No ledger gaps occurred
+            // - All ledgers between the time we submitted the tx and now have been checked for the tx
+            status = {
+              finalResult: 'Transaction was not, and never will be, included in a validated ledger'
+            }
+          } else {
+            // Check again later:
+            api.connection.once('ledgerClosed', ledgerClosedCallback)
+            return
+          }
+        }
+
+        for (let j = 0; j < finalResults.length; j++) {
+          if (finalResults[j].id === signed.id) {
+            finalResults[j].result = status.address ? {
+              source: status.address,
+              destination: status.specification.destination.address,
+              deliveredAmount: status.outcome.deliveredAmount,
+              result: status.outcome.result,
+              timestamp: status.outcome.timestamp,
+              ledgerVersion: status.outcome.ledgerVersion
+            } : status
+            process.stdout.write('.')
+            return resolve()
+          }
+        }
+      }
+      api.connection.once('ledgerClosed', ledgerClosedCallback)
+    })
+    txFinalizedPromises.push(txFinalizedPromise)
+  }
+  await Promise.all(txFinalizedPromises)
+  return finalResults
+}
+
+/**
+ * Generate a new Testnet account by requesting one from the faucet
+ */
+async function generateTestnetAccount(): Promise<{
+  account: {
+    xAddress: string,
+    classicAddress, string,
+    secret: string
+  },
+  balance: number
+ }> {
+  const options = {
+    hostname: 'faucet.altnet.rippletest.net',
+    port: 443,
+    path: '/accounts',
+    method: 'POST'
+  }
+  return new Promise((resolve, reject) => {
+    const request = https.request(options, response => {
+      const chunks = []
+      response.on('data', d => {
+        chunks.push(d)
+      })
+      response.on('end', () => {
+        const body = Buffer.concat(chunks).toString()
+
+        // "application/json; charset=utf-8"
+        if (response.headers['content-type'].startsWith('application/json')) {
+          resolve(JSON.parse(body))
+        } else {
+          reject({
+            statusCode: response.statusCode,
+            contentType: response.headers['content-type'],
+            body
+          })
+        }
+      })
+    })
+    request.on('error', error => {
+      console.error(error)
+      reject(error)
+    })
+    request.end()
+  })
+}
--- a/src/api.ts
+++ b/src/api.ts
@@ -43,6 +43,7 @@ import prepareCheckCreate from './transaction/check-create'
 import prepareCheckCancel from './transaction/check-cancel'
 import prepareCheckCash from './transaction/check-cash'
 import prepareSettings from './transaction/settings'
+import prepareTicketCreate from './transaction/ticket'
 import sign from './transaction/sign'
 import combine from './transaction/combine'
 import submit from './transaction/submit'
@@ -88,7 +89,20 @@ import {getServerInfo, getFee} from './common/serverinfo'
 import {clamp, renameCounterpartyToIssuer} from './ledger/utils'
 import {TransactionJSON, Instructions, Prepare} from './transaction/types'
 import {ConnectionUserOptions} from './common/connection'
-import {isValidXAddress, isValidClassicAddress} from 'ripple-address-codec'
+import {classicAddressToXAddress, xAddressToClassicAddress, isValidXAddress, isValidClassicAddress, encodeSeed, decodeSeed, encodeAccountID, decodeAccountID, encodeNodePublic, decodeNodePublic, encodeAccountPublic, decodeAccountPublic, encodeXAddress, decodeXAddress} from 'ripple-address-codec'
+import {
+  computeBinaryTransactionHash,
+  computeTransactionHash,
+  computeBinaryTransactionSigningHash,
+  computeAccountLedgerObjectID,
+  computeSignerListLedgerObjectID,
+  computeOrderID,
+  computeTrustlineHash,
+  computeTransactionTreeHash,
+  computeStateTreeHash,
+  computeEscrowHash,
+  computePaymentChannelHash
+} from './common/hashes'

 export interface APIOptions extends ConnectionUserOptions {
  server?: string
@@ -142,7 +156,7 @@ class RippleAPI extends EventEmitter {
    const serverURL = options.server
    if (serverURL !== undefined) {
      this.connection = new Connection(serverURL, options)
-      this.connection.on('ledgerClosed', message => {
+      this.connection.on('ledgerClosed', (message) => {
        this.emit('ledger', formatLedgerClose(message))
      })
      this.connection.on('error', (errorCode, errorMessage, data) => {
@@ -151,12 +165,12 @@ class RippleAPI extends EventEmitter {
      this.connection.on('connected', () => {
        this.emit('connected')
      })
-      this.connection.on('disconnected', code => {
+      this.connection.on('disconnected', (code) => {
        let finalCode = code
-        // This is a backwards-compatible fix for this change in the ws library:
-        //   https://github.com/websockets/ws/issues/1257
+        // 1005: This is a backwards-compatible fix for this change in the ws library: https://github.com/websockets/ws/issues/1257
+        // 4000: Connection uses a 4000 code internally to indicate a manual disconnect/close
        // TODO: Remove in next major, breaking version
-        if (finalCode === 1005) {
+        if (finalCode === 1005 || finalCode === 4000) {
          finalCode = 1000
        }
        this.emit('disconnected', finalCode)
@@ -252,7 +266,7 @@ class RippleAPI extends EventEmitter {
  /**
   * Prepare a transaction.
   *
-   * You can later submit the transaction with `submit()`.
+   * You can later submit the transaction with a `submit` request.
   */
  async prepareTransaction(
    txJSON: TransactionJSON,
@@ -382,10 +396,12 @@ class RippleAPI extends EventEmitter {
  prepareCheckCreate = prepareCheckCreate
  prepareCheckCash = prepareCheckCash
  prepareCheckCancel = prepareCheckCancel
+  prepareTicketCreate = prepareTicketCreate
  prepareSettings = prepareSettings
  sign = sign
  combine = combine
-  submit = submit
+
+  submit = submit // @deprecated Use api.request('submit', { tx_blob: signedTransaction }) instead

  deriveKeypair = deriveKeypair
  deriveAddress = deriveAddress
@@ -399,8 +415,48 @@ class RippleAPI extends EventEmitter {
  // RippleAPI.deriveClassicAddress (static) is a new name for api.deriveAddress
  static deriveClassicAddress = deriveAddress

-  static isValidXAddress = isValidXAddress
-  static isValidClassicAddress = isValidClassicAddress
+  /**
+   * Static methods to expose ripple-address-codec methods
+   */
+   static classicAddressToXAddress = classicAddressToXAddress
+   static xAddressToClassicAddress = xAddressToClassicAddress
+   static isValidXAddress = isValidXAddress
+   static isValidClassicAddress = isValidClassicAddress
+   static encodeSeed = encodeSeed
+   static decodeSeed = decodeSeed
+   static encodeAccountID = encodeAccountID
+   static decodeAccountID = decodeAccountID
+   static encodeNodePublic = encodeNodePublic
+   static decodeNodePublic = decodeNodePublic
+   static encodeAccountPublic = encodeAccountPublic
+   static decodeAccountPublic = decodeAccountPublic
+   static encodeXAddress = encodeXAddress
+   static decodeXAddress = decodeXAddress
+
+  /**
+   * Static methods that replace functionality from the now-deprecated ripple-hashes library
+   */
+  // Compute the hash of a binary transaction blob.
+  static computeBinaryTransactionHash = computeBinaryTransactionHash // (txBlobHex: string): string
+  // Compute the hash of a transaction in txJSON format.
+  static computeTransactionHash = computeTransactionHash // (txJSON: any): string
+  static computeBinaryTransactionSigningHash = computeBinaryTransactionSigningHash // (txBlobHex: string): string
+  // Compute the hash of an account, given the account's classic address (starting with `r`).
+  static computeAccountLedgerObjectID = computeAccountLedgerObjectID // (address: string): string
+  // Compute the hash (ID) of an account's SignerList.
+  static computeSignerListLedgerObjectID = computeSignerListLedgerObjectID // (address: string): string
+  // Compute the hash of an order, given the owner's classic address (starting with `r`) and the account sequence number of the `OfferCreate` order transaction.
+  static computeOrderID = computeOrderID // (address: string, sequence: number): string
+  // Compute the hash of a trustline, given the two parties' classic addresses (starting with `r`) and the currency code.
+  static computeTrustlineHash = computeTrustlineHash // (address1: string, address2: string, currency: string): string
+  static computeTransactionTreeHash = computeTransactionTreeHash // (transactions: any[]): string
+  static computeStateTreeHash = computeStateTreeHash // (entries: any[]): string
+  // Compute the hash of a ledger.
+  static computeLedgerHash = computeLedgerHash // (ledgerHeader): string
+  // Compute the hash of an escrow, given the owner's classic address (starting with `r`) and the account sequence number of the `EscrowCreate` escrow transaction.
+  static computeEscrowHash = computeEscrowHash // (address, sequence): string
+  // Compute the hash of a payment channel, given the owner's classic address (starting with `r`), the classic address of the destination, and the account sequence number of the `PaymentChannelCreate` payment channel transaction.
+  static computePaymentChannelHash = computePaymentChannelHash // (address, dstAddress, sequence): string

  xrpToDrops = xrpToDrops
  dropsToXrp = dropsToXrp
@@ -412,4 +468,29 @@ class RippleAPI extends EventEmitter {
  isValidSecret = schemaValidator.isValidSecret
 }

-export {RippleAPI}
+export {
+  RippleAPI
+}
+
+export type {
+  AccountObjectsRequest,
+  AccountObjectsResponse,
+  AccountOffersRequest,
+  AccountOffersResponse,
+  AccountInfoRequest,
+  AccountInfoResponse,
+  AccountLinesRequest,
+  AccountLinesResponse,
+  BookOffersRequest,
+  BookOffersResponse,
+  GatewayBalancesRequest,
+  GatewayBalancesResponse,
+  LedgerRequest,
+  LedgerResponse,
+  LedgerDataRequest,
+  LedgerDataResponse,
+  LedgerEntryRequest,
+  LedgerEntryResponse,
+  ServerInfoRequest,
+  ServerInfoResponse
+}
--- a/src/broadcast.ts
+++ b/src/broadcast.ts
@@ -9,38 +9,38 @@ class RippleAPIBroadcast extends RippleAPI {
    super(options)

    const apis: RippleAPI[] = servers.map(
-      server => new RippleAPI(_.assign({}, options, {server}))
+      (server) => new RippleAPI(_.assign({}, options, {server}))
    )

    // exposed for testing
    this._apis = apis

-    this.getMethodNames().forEach(name => {
-      this[name] = function() {
+    this.getMethodNames().forEach((name) => {
+      this[name] = function () {
        // eslint-disable-line no-loop-func
-        return Promise.race(apis.map(api => api[name](...arguments)))
+        return Promise.race(apis.map((api) => api[name](...arguments)))
      }
    })

    // connection methods must be overridden to apply to all api instances
-    this.connect = async function() {
-      await Promise.all(apis.map(api => api.connect()))
+    this.connect = async function () {
+      await Promise.all(apis.map((api) => api.connect()))
    }
-    this.disconnect = async function() {
-      await Promise.all(apis.map(api => api.disconnect()))
+    this.disconnect = async function () {
+      await Promise.all(apis.map((api) => api.disconnect()))
    }
-    this.isConnected = function() {
-      return apis.map(api => api.isConnected()).every(Boolean)
+    this.isConnected = function () {
+      return apis.map((api) => api.isConnected()).every(Boolean)
    }

    // synchronous methods are all passed directly to the first api instance
    const defaultAPI = apis[0]
    const syncMethods = ['sign', 'generateAddress', 'computeLedgerHash']
-    syncMethods.forEach(name => {
+    syncMethods.forEach((name) => {
      this[name] = defaultAPI[name].bind(defaultAPI)
    })

-    apis.forEach(api => {
+    apis.forEach((api) => {
      api.on('ledger', this.onLedgerEvent.bind(this))
      api.on('error', (errorCode, errorMessage, data) =>
        this.emit('error', errorCode, errorMessage, data)
--- a/src/common/backoff.ts
+++ b/src/common/backoff.ts
@@ -0,0 +1,44 @@
+/*
+ * Original code based on "backo" - https://github.com/segmentio/backo
+ * MIT License - Copyright 2014 Segment.io
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * A Back off strategy that increases exponentially. Useful with repeated
+ * setTimeout calls over a network (where the destination may be down).
+ */
+export class ExponentialBackoff {
+  private readonly ms: number
+  private readonly max: number
+  private readonly factor: number = 2
+  private readonly jitter: number = 0
+  attempts: number = 0
+
+  constructor(opts: {min?: number; max?: number} = {}) {
+    this.ms = opts.min || 100
+    this.max = opts.max || 10000
+  }
+
+  /**
+   * Return the backoff duration.
+   */
+  duration() {
+    var ms = this.ms * Math.pow(this.factor, this.attempts++)
+    if (this.jitter) {
+      var rand = Math.random()
+      var deviation = Math.floor(rand * this.jitter * ms)
+      ms = (Math.floor(rand * 10) & 1) == 0 ? ms - deviation : ms + deviation
+    }
+    return Math.min(ms, this.max) | 0
+  }
+
+  /**
+   * Reset the number of attempts.
+   */
+  reset() {
+    this.attempts = 0
+  }
+}
--- a/src/common/connection.ts
+++ b/src/common/connection.ts
--- a/src/common/constants.ts
+++ b/src/common/constants.ts
@@ -58,6 +58,18 @@ const AccountFlags = {
  defaultRipple: accountRootFlags.DefaultRipple
 }

+export interface Settings {
+  passwordSpent?: boolean
+  requireDestinationTag?: boolean
+  requireAuthorization?: boolean
+  depositAuth?: boolean
+  disallowIncomingXRP?: boolean
+  disableMasterKey?: boolean
+  noFreeze?: boolean
+  globalFreeze?: boolean
+  defaultRipple?: boolean
+}
+
 const AccountFlagIndices = {
  requireDestinationTag: txFlagIndices.AccountSet.asfRequireDest,
  requireAuthorization: txFlagIndices.AccountSet.asfRequireAuth,
--- a/src/common/hashes/README.md
+++ b/src/common/hashes/README.md
@@ -2,7 +2,7 @@

 Methods to hash XRP Ledger objects

-## Methods
+## Computing a transaction hash (ID)

 ### computeBinaryTransactionHash = (txBlobHex: string): string

@@ -12,19 +12,35 @@ Compute the hash of a binary transaction blob.

 Compute the hash of a transaction in txJSON format.

+## [Hash Prefixes](https://xrpl.org/basic-data-types.html#hash-prefixes)
+
+In many cases, the XRP Ledger prefixes an object's binary data with a 4-byte code before calculating its hash, so that objects of different types have different hashes even if the binary data is the same. The existing 4-byte codes are structured as 3 alphabetic characters, encoded as ASCII, followed by a zero byte.
+
+Some types of hashes appear in API requests and responses. Others are only calculated as the first step of signing a certain type of data, or calculating a higher-level hash. Some of following methods internally use some of the 4-byte hash prefixes in order to calculate the appropriate hash.
+
 ### computeBinaryTransactionSigningHash = (txBlobHex: string): string

-### computeTransactionSigningHash = (txJSON: any): string
+In order to single-sign a transaction, you must perform these steps:

-### computeAccountHash = (address: string): string
+1. Assuming the transaction is in JSON format (txJSON), `encode` the transaction in the XRP Ledger's binary format.
+2. Hash the data with the appropriate prefix (`0x53545800` if single-signing, or `0x534D5400` if multi-signing).
+3. After signing, you must re-serialize the transaction with the `TxnSignature` field included.
+
+The `computeBinaryTransactionSigningHash` helps with step 2, automatically using the `0x53545800` prefix needed for single-signing a transaction.
+
+For details, see [Serialization Format](https://xrpl.org/serialization.html).
+
+_Removed:_ `computeTransactionSigningHash`, which took txJSON as a parameter. It was part of the deprecated ripple-hashes library. If you have txJSON, `encode` it with [ripple-binary-codec](https://github.com/ripple/ripple-binary-codec) first. Example: `return computeBinaryTransactionSigningHash(encode(txJSON))`
+
+### computeAccountLedgerObjectID = (address: string): string

 Compute the hash of an account, given the account's classic address (starting with `r`).

-### computeSignerListHash = (address: string): string
+### computeSignerListLedgerObjectID = (address: string): string

 Compute the hash of an account's SignerList.

-### computeOrderHash = (address: string, sequence: number): string
+### computeOrderID = (address: string, sequence: number): string

 Compute the hash of an order, given the owner's classic address (starting with `r`) and the account sequence number of the `OfferCreate` order transaction.

--- a/src/common/hashes/index.ts
+++ b/src/common/hashes/index.ts
@@ -36,10 +36,7 @@ const addressToHex = (address: string): string => {

 const currencyToHex = (currency: string): string => {
  if (currency.length === 3) {
-    const bytes = new Array(20 + 1)
-      .join('0')
-      .split('')
-      .map(parseFloat)
+    const bytes = new Array(20 + 1).join('0').split('').map(parseFloat)
    bytes[12] = currency.charCodeAt(0) & 0xff
    bytes[13] = currency.charCodeAt(1) & 0xff
    bytes[14] = currency.charCodeAt(2) & 0xff
@@ -71,6 +68,14 @@ export const computeTransactionHash = (txJSON: any): string => {
  return computeBinaryTransactionHash(encode(txJSON))
 }

+/**
+ * Hash the given binary transaction data with the single-signing prefix.
+ *
+ * See [Serialization Format](https://xrpl.org/serialization.html)
+ *
+ * @param txBlobHex The binary transaction blob as a hexadecimal string
+ * @returns {string} The hash to sign
+ */
 export const computeBinaryTransactionSigningHash = (
  txBlobHex: string
 ): string => {
@@ -78,21 +83,56 @@ export const computeBinaryTransactionSigningHash = (
  return sha512Half(prefix + txBlobHex)
 }

-export const computeTransactionSigningHash = (txJSON: any): string => {
-  return computeBinaryTransactionSigningHash(encode(txJSON))
-}
-
-export const computeAccountHash = (address: string): string => {
+/**
+ * Compute Account Ledger Object ID
+ *
+ * All objects in a ledger's state tree have a unique ID.
+ * The Account Ledger Object ID is derived by hashing the
+ * address with a namespace identifier. This ensures every
+ * ID is unique.
+ *
+ * See [Ledger Object IDs](https://xrpl.org/ledger-object-ids.html)
+ *
+ * @param address The classic account address
+ * @returns {string} The Ledger Object ID for the account
+ */
+export const computeAccountLedgerObjectID = (address: string): string => {
  return sha512Half(ledgerSpaceHex('account') + addressToHex(address))
 }

-export const computeSignerListHash = (address: string): string => {
+/**
+ * [SignerList ID Format](https://xrpl.org/signerlist.html#signerlist-id-format)
+ *
+ * The ID of a SignerList object is the SHA-512Half of the following values, concatenated in order:
+ *   * The RippleState space key (0x0053)
+ *   * The AccountID of the owner of the SignerList
+ *   * The SignerListID (currently always 0)
+ *
+ * This method computes a SignerList Ledger Object ID.
+ *
+ * @param address The classic account address of the SignerList owner (starting with r)
+ * @return {string} The ID of the account's SignerList object
+ */
+export const computeSignerListLedgerObjectID = (address: string): string => {
  return sha512Half(
    ledgerSpaceHex('signerList') + addressToHex(address) + '00000000'
  ) // uint32(0) signer list index
 }

-export const computeOrderHash = (address: string, sequence: number): string => {
+/**
+ * [Offer ID Format](https://xrpl.org/offer.html#offer-id-format)
+ *
+ * The ID of a Offer object is the SHA-512Half of the following values, concatenated in order:
+ *   * The Offer space key (0x006F)
+ *   * The AccountID of the account placing the offer
+ *   * The Sequence number of the OfferCreate transaction that created the offer
+ *
+ * This method computes an Offer ID (aka Order ID).
+ *
+ * @param address The classic account address of the SignerList owner (starting with r)
+ * @returns {string} The ID of the account's Offer object
+ */
+export const computeOrderID = (address: string, sequence: number): string => {
  const prefix = '00' + intToHex(ledgerspaces.offer.charCodeAt(0), 1)
  return sha512Half(prefix + addressToHex(address) + intToHex(sequence, 4))
 }
@@ -120,7 +160,7 @@ export const computeTrustlineHash = (
 export const computeTransactionTreeHash = (transactions: any[]): string => {
  const shamap = new SHAMap()

-  transactions.forEach(txJSON => {
+  transactions.forEach((txJSON) => {
    const txBlobHex = encode(txJSON)
    const metaHex = encode(txJSON.metaData)
    const txHash = computeBinaryTransactionHash(txBlobHex)
@@ -134,7 +174,7 @@ export const computeTransactionTreeHash = (transactions: any[]): string => {
 export const computeStateTreeHash = (entries: any[]): string => {
  const shamap = new SHAMap()

-  entries.forEach(ledgerEntry => {
+  entries.forEach((ledgerEntry) => {
    const data = encode(ledgerEntry)
    shamap.addItem(ledgerEntry.index, data, NodeType.ACCOUNT_STATE)
  })
--- a/src/common/hashes/ledgerspaces.ts
+++ b/src/common/hashes/ledgerspaces.ts
@@ -1,10 +1,12 @@
 /**
- * Ripple ledger namespace prefixes.
+ * XRP Ledger namespace prefixes.
 *
- * The Ripple ledger is a key-value store. In order to avoid name collisions,
+ * The XRP Ledger is a key-value store. In order to avoid name collisions,
 * names are partitioned into namespaces.
 *
 * Each namespace is just a single character prefix.
+ *
+ * See [LedgerNameSpace enum](https://github.com/ripple/rippled/blob/master/src/ripple/protocol/LedgerFormats.h#L100)
 */
 export default {
  account: 'a',
@@ -16,9 +18,12 @@ export default {
  bookDir: 'B', // Directory of order books.
  contract: 'c',
  skipList: 's',
+  escrow: 'u',
  amendment: 'f',
  feeSettings: 'e',
+  ticket: 'T',
  signerList: 'S',
-  escrow: 'u',
-  paychan: 'x'
+  paychan: 'x',
+  check: 'C',
+  depositPreauth: 'p'
 }
--- a/src/common/index.ts
+++ b/src/common/index.ts
@@ -34,5 +34,5 @@ export {
  iso8601ToRippleTime,
  rippleTimeToISO8601
 } from './utils'
-export {default as Connection} from './connection'
+export {Connection} from './connection'
 export {txFlags} from './txflags'
--- a/src/common/rangeset.ts
+++ b/src/common/rangeset.ts
@@ -5,7 +5,7 @@ type Interval = [number, number]

 function mergeIntervals(intervals: Interval[]): Interval[] {
  const stack: Interval[] = [[-Infinity, -Infinity]]
-  _.sortBy(intervals, x => x[0]).forEach(interval => {
+  _.sortBy(intervals, (x) => x[0]).forEach((interval) => {
    const lastInterval: Interval = stack.pop()!
    if (interval[0] <= lastInterval[1] + 1) {
      stack.push([lastInterval[0], Math.max(interval[1], lastInterval[1])])
@@ -30,7 +30,7 @@ class RangeSet {

  serialize() {
    return this.ranges
-      .map(range => range[0].toString() + '-' + range[1].toString())
+      .map((range) => range[0].toString() + '-' + range[1].toString())
      .join(',')
  }

@@ -45,14 +45,14 @@ class RangeSet {

  parseAndAddRanges(rangesString: string) {
    const rangeStrings = rangesString.split(',')
-    _.forEach(rangeStrings, rangeString => {
+    _.forEach(rangeStrings, (rangeString) => {
      const range = rangeString.split('-').map(Number)
      this.addRange(range[0], range.length === 1 ? range[0] : range[1])
    })
  }

  containsRange(start: number, end: number) {
-    return _.some(this.ranges, range => range[0] <= start && range[1] >= end)
+    return _.some(this.ranges, (range) => range[0] <= start && range[1] >= end)
  }

  containsValue(value: number) {
--- a/src/common/schema-validator.ts
+++ b/src/common/schema-validator.ts
@@ -13,6 +13,7 @@ function loadSchemas() {
    require('./schemas/objects/hash128.json'),
    require('./schemas/objects/hash256.json'),
    require('./schemas/objects/sequence.json'),
+    require('./schemas/objects/ticket-sequence.json'),
    require('./schemas/objects/signature.json'),
    require('./schemas/objects/issue.json'),
    require('./schemas/objects/ledger-version.json'),
@@ -115,6 +116,7 @@ function loadSchemas() {
    require('./schemas/input/prepare-check-create.json'),
    require('./schemas/input/prepare-check-cash.json'),
    require('./schemas/input/prepare-check-cancel.json'),
+    require('./schemas/input/prepare-ticket-create.json'),
    require('./schemas/input/compute-ledger-hash.json'),
    require('./schemas/input/sign.json'),
    require('./schemas/input/submit.json'),
@@ -123,8 +125,8 @@ function loadSchemas() {
    require('./schemas/input/verify-payment-channel-claim.json'),
    require('./schemas/input/combine.json')
  ]
-  const titles = schemas.map(schema => schema.title)
-  const duplicates = _.keys(_.pickBy(_.countBy(titles), count => count > 1))
+  const titles = schemas.map((schema) => schema.title)
+  const duplicates = _.keys(_.pickBy(_.countBy(titles), (count) => count > 1))
  assert.ok(duplicates.length === 0, 'Duplicate schemas for: ' + duplicates)
  const validator = new Validator()
  // Register custom format validators that ignore undefined instances
@@ -132,7 +134,7 @@ function loadSchemas() {
  // (optional)  property

  // This relies on "format": "xAddress" in `x-address.json`!
-  validator.customFormats.xAddress = function(instance) {
+  validator.customFormats.xAddress = function (instance) {
    if (instance === undefined) {
      return true
    }
@@ -140,14 +142,14 @@ function loadSchemas() {
  }

  // This relies on "format": "classicAddress" in `classic-address.json`!
-  validator.customFormats.classicAddress = function(instance) {
+  validator.customFormats.classicAddress = function (instance) {
    if (instance === undefined) {
      return true
    }
    return isValidAddress(instance)
  }

-  validator.customFormats.secret = function(instance) {
+  validator.customFormats.secret = function (instance) {
    if (instance === undefined) {
      return true
    }
@@ -155,7 +157,9 @@ function loadSchemas() {
  }

  // Register under the root URI '/'
-  _.forEach(schemas, schema => validator.addSchema(schema, '/' + schema.title))
+  _.forEach(schemas, (schema) =>
+    validator.addSchema(schema, '/' + schema.title)
+  )
  return validator
 }

--- a/src/common/schemas/input/api-options.json
+++ b/src/common/schemas/input/api-options.json
@@ -28,7 +28,12 @@
    },
    "timeout": {
      "type": "integer",
-      "description": "Timeout in milliseconds before considering a request to have failed.",
+      "description": "Request timeout in milliseconds before considering a request to have failed. See also: connectionTimeout.",
+      "minimum": 1
+    },
+    "connectionTimeout": {
+      "type": "integer",
+      "description": "Connection timeout, in milliseconds, before considering connect() to have failed.",
      "minimum": 1
    },
    "proxyAuthorization": {
--- a/src/common/schemas/input/generate-address.json
+++ b/src/common/schemas/input/generate-address.json
@@ -14,7 +14,7 @@
            "minimum": 0,
            "maximum": 255
          },
-          "description": "The entropy to use to generate the seed."
+          "description": "The entropy to use to generate the seed. Must be an array of length 16 with values from 0-255 (16 bytes of entropy)"
        },
        "algorithm": {
          "type": "string",
--- a/src/common/schemas/input/generate-x-address.json
+++ b/src/common/schemas/input/generate-x-address.json
@@ -14,7 +14,7 @@
            "minimum": 0,
            "maximum": 255
          },
-          "description": "The entropy to use to generate the seed."
+          "description": "The entropy to use to generate the seed. Must be an array of length 16 with values from 0-255 (16 bytes of entropy)"
        },
        "algorithm": {
          "type": "string",
@@ -24,6 +24,10 @@
        "test": {
          "type": "boolean",
          "description": "Specifies whether the address is intended for use on a test network such as Testnet or Devnet. If `true`, the address should only be used for testing, and will start with `T`. If `false`, the address should only be used on mainnet, and will start with `X`."
+        },
+        "includeClassicAddress": {
+          "type": "boolean",
+          "description": "Specifies whether the classic address should also be included in the returned payload."
        }
      },
      "additionalProperties": false
--- a/src/common/schemas/input/prepare-ticket-create.json
+++ b/src/common/schemas/input/prepare-ticket-create.json
@@ -0,0 +1,18 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "prepareTicketParameters",
+  "type": "object",
+  "properties": {
+    "address": {
+      "$ref": "address",
+      "description": "The address of the account that is creating the transaction."
+    },
+    "ticketCount": {
+      "type": "number",
+      "description": "The number of tickets to be created."
+    },
+    "instructions": {"$ref": "instructions"}
+  },
+  "additionalProperties": false,
+  "required": ["address", "ticketCount"]
+}
--- a/src/common/schemas/input/submit.json
+++ b/src/common/schemas/input/submit.json
@@ -6,6 +6,10 @@
    "signedTransaction": {
      "$ref": "blob",
      "description": "A signed transaction as returned by [sign](#sign)."
+    },
+    "failHard": {
+      "type": "boolean",
+      "description": "If `true`, and the transaction fails locally, do not retry or relay the transaction to other servers. Defaults to `false`."
    }
  },
  "additionalProperties": false,
--- a/src/common/schemas/objects/instructions.json
+++ b/src/common/schemas/objects/instructions.json
@@ -6,9 +6,13 @@
  "type": "object",
  "properties": {
    "sequence": {
-      "description": "The initiating account's sequence number for this transaction.",
+      "description": "The initiating account's sequence number for this transaction. `sequence` and `ticketSequence` are mutually exclusive, only one of them can be set.",
      "$ref": "sequence"
    },
+    "ticketSequence": {
+      "description": "The ticket sequence to be used for this transaction. `sequence` and `ticketSequence` are mutually exclusive, only one of them can be set.",
+      "$ref": "ticket-sequence"
+    },
    "fee": {
      "description": "An exact fee to pay for the transaction, before multiplying for multi-signed transactions. See [Transaction Fees](#transaction-fees) for more information.",
      "$ref": "value"
@@ -45,6 +49,10 @@
      {
        "description": "maxLedgerVersion and maxLedgerVersionOffset are mutually exclusive",
        "required": ["maxLedgerVersion", "maxLedgerVersionOffset"]
+      },
+      {
+        "description": "sequence and ticketSequence are mutually exclusive",
+        "required": ["sequence", "ticketSequence"]
      }
    ]
  }
--- a/src/common/schemas/objects/sequence.json
+++ b/src/common/schemas/objects/sequence.json
@@ -4,5 +4,5 @@
  "link": "account-sequence-number",
  "description": "An account transaction sequence number",
  "type": "integer",
-  "minimum": 1
+  "minimum": 0
 }
--- a/src/common/schemas/objects/ticket-sequence.json
+++ b/src/common/schemas/objects/ticket-sequence.json
@@ -0,0 +1,8 @@
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "title": "ticket-sequence",
+  "link": "account-sequence-number",
+  "description": "An account transaction tickt sequence number",
+  "type": "integer",
+  "minimum": 1
+}
--- a/src/common/schemas/output/get-ledger.json
+++ b/src/common/schemas/output/get-ledger.json
@@ -10,12 +10,12 @@
    "closeTime": {
      "type": "string",
      "format": "date-time",
-      "description": "The time at which this ledger was closed."
+      "description": "The approximate time when this ledger was closed. This number is rounded based on the `closeTimeResolution`. If it would have been rounded to the same time as a previous ledger, the close time is recorded as 1 second later instead."
    },
    "closeTimeResolution": {
      "type": "integer",
      "minimum": 1,
-      "description": "Approximate number of seconds between closing one ledger version and closing the next one."
+      "description": "A number of seconds, indicating how much the `closeTime` could be rounded. Ledger close times are approximate so that small differences in servers clocks don't hinder consensus."
    },
    "closeFlags": {
      "type": "integer",
@@ -37,7 +37,7 @@
    "parentCloseTime": {
      "type": "string",
      "format": "date-time",
-      "description": "The time at which the previous ledger was closed."
+      "description": "The previous ledger's recorded close time."
    },
    "totalDrops": {
      "$ref": "value",
--- a/src/common/schemas/output/prepare.json
+++ b/src/common/schemas/output/prepare.json
@@ -18,7 +18,11 @@
        },
        "sequence": {
          "$ref": "sequence",
-          "description": "The initiating account's sequence number for this transaction."
+          "description": "The initiating account's sequence number for this transaction. `sequence` and `ticketSequence` are mutually exclusive, only one of them can be set."
+        },
+        "ticketSequence": {
+          "$ref": "ticket-sequence",
+          "description": "The initiating account's ticket sequence number for this transaction. `sequence` and `ticketSequence` are mutually exclusive, only one of them can be set."
        },
        "maxLedgerVersion": {
          "oneOf": [
@@ -29,8 +33,14 @@
        }
      },
      "additionalProperties": false,
-      "required": ["fee", "sequence", "maxLedgerVersion"]
-    }
+      "required": ["fee", "maxLedgerVersion"],
+      "anyOf": [
+          { "required":
+            [ "sequence" ] },
+          { "required":
+            [ "ticketSequence" ] }
+        ]
+      }
  },
  "additionalProperties": false,
  "required": ["txJSON", "instructions"]
--- a/src/common/schemas/specifications/account-delete.json
+++ b/src/common/schemas/specifications/account-delete.json
@@ -15,7 +15,8 @@
    "destinationXAddress": {
      "$ref": "address",
      "description": "X-address of an account to receive any leftover XRP after deleting the sending account. Must be a funded account in the ledger, and must not be the sending account."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "anyOf": [
    {
--- a/src/common/schemas/specifications/check-cancel.json
+++ b/src/common/schemas/specifications/check-cancel.json
@@ -7,7 +7,8 @@
    "checkID": {
      "$ref": "hash256",
      "description": "The ID of the Check ledger object to cancel, as a 64-character hexadecimal string."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "required": ["checkID"],
  "additionalProperties": false
--- a/src/common/schemas/specifications/check-cash.json
+++ b/src/common/schemas/specifications/check-cash.json
@@ -15,7 +15,8 @@
    "deliverMin": {
      "$ref": "laxAmount",
      "description": "Redeem the Check for at least this amount and for as much as possible. The currency must match that of the sendMax of the corresponding CheckCreate transaction. You must provide either this field or amount."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "required": ["checkID"],
  "oneOf": [
--- a/src/common/schemas/specifications/check-create.json
+++ b/src/common/schemas/specifications/check-create.json
@@ -24,7 +24,8 @@
    "invoiceID": {
      "$ref": "hash256",
      "description": "256-bit hash, as a 64-character hexadecimal string, representing a specific reason or identifier for this check."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "required": ["destination", "sendMax"],
  "additionalProperties": false
--- a/src/common/schemas/specifications/deposit-preauth.json
+++ b/src/common/schemas/specifications/deposit-preauth.json
@@ -11,7 +11,8 @@
    "unauthorize": {
      "$ref": "address",
      "description": "Address of the account that can cash the check."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "oneOf": [
    {"required": ["authorize"]},
--- a/src/common/schemas/specifications/payment-channel-claim.json
+++ b/src/common/schemas/specifications/payment-channel-claim.json
@@ -31,7 +31,8 @@
    "close": {
      "type": "boolean",
      "description": "Request to close the channel. If the channel has no XRP remaining or the destination address requests it, closes the channel immediately (returning unclaimed XRP to the source address). Otherwise, sets the channel to expire after settleDelay seconds have passed."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "required": ["channel"],
  "additionalProperties": false
--- a/src/common/schemas/specifications/payment-channel-create.json
+++ b/src/common/schemas/specifications/payment-channel-create.json
@@ -32,7 +32,8 @@
    "destinationTag": {
      "$ref": "tag",
      "description": "Destination tag."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "required": ["amount", "destination", "settleDelay", "publicKey"],
  "additionalProperties": false
--- a/src/common/schemas/specifications/payment-channel-fund.json
+++ b/src/common/schemas/specifications/payment-channel-fund.json
@@ -16,7 +16,8 @@
      "type": "string",
      "format": "date-time",
      "description": "New expiration for this channel. (This does not change the cancelAfter expiration, if the channel has one.) Cannot move the expiration sooner than settleDelay seconds from time of the request."
-    }
+    },
+    "memos": {"$ref": "memos"}
  },
  "required": ["amount", "channel"],
  "additionalProperties": false
--- a/src/common/serverinfo.ts
+++ b/src/common/serverinfo.ts
@@ -41,7 +41,7 @@ function renameKeys(object, mapping) {
 }

 function getServerInfo(this: RippleAPI): Promise<GetServerInfoResponse> {
-  return this.request('server_info').then(response => {
+  return this.request('server_info').then((response) => {
    const info = convertKeysFromSnakeCaseToCamelCase(response.info)
    renameKeys(info, {hostid: 'hostID'})
    if (info.validatedLedger) {
@@ -71,6 +71,10 @@ async function getFee(this: RippleAPI, cushion?: number): Promise<string> {

  const serverInfo = (await this.request('server_info')).info
  const baseFeeXrp = new BigNumber(serverInfo.validated_ledger.base_fee_xrp)
+  if (serverInfo.load_factor === undefined) {
+    // https://github.com/ripple/rippled/issues/3812#issuecomment-816871100
+    serverInfo.load_factor = 1
+  }
  let fee = baseFeeXrp.times(serverInfo.load_factor).times(cushion)

  // Cap fee to `this._maxFeeXRP`
--- a/src/common/types/objects/ledger.ts
+++ b/src/common/types/objects/ledger.ts
@@ -21,3 +21,17 @@ export interface Ledger {
  accountState?: any[]
  validated?: boolean
 }
+
+// https://xrpl.org/subscribe.html#ledger-stream
+export type LedgerClosedEvent = {
+  type: 'ledgerClosed'
+  fee_base: number
+  fee_ref: number
+  ledger_hash: string
+  ledger_index: number
+  ledger_time: number
+  reserve_base: number
+  reserve_inc: number
+  txn_count: number
+  validated_ledgers: string
+}
--- a/src/common/types/objects/signers.ts
+++ b/src/common/types/objects/signers.ts
@@ -1,4 +1,6 @@
 export interface SignerEntry {
-  Account: string
-  SignerWeight: number
+  SignerEntry: {
+    Account: string
+    SignerWeight: number
+  }
 }
--- a/src/common/utils.ts
+++ b/src/common/utils.ts
@@ -134,7 +134,7 @@ function convertKeysFromSnakeCaseToCamelCase(obj: any): any {
        // taking this out of function leads to error in PhantomJS
        const FINDSNAKE = /([a-zA-Z]_[a-zA-Z])/g
        if (FINDSNAKE.test(key)) {
-          newKey = key.replace(FINDSNAKE, r => r[0] + r[2].toUpperCase())
+          newKey = key.replace(FINDSNAKE, (r) => r[0] + r[2].toUpperCase())
        }
        result[newKey] = convertKeysFromSnakeCaseToCamelCase(value)
        return result
--- a/src/common/validate.ts
+++ b/src/common/validate.ts
@@ -132,6 +132,11 @@ export const prepareCheckCancel = _.partial(
  'prepareCheckCancelParameters'
 )

+export const prepareTicketCreate = _.partial(
+  schemaValidate,
+  'prepareTicketParameters'
+)
+
 export const sign = _.partial(schemaValidate, 'signParameters')

 export const combine = _.partial(schemaValidate, 'combineParameters')
--- a/src/common/wswrapper.ts
+++ b/src/common/wswrapper.ts
@@ -37,11 +37,11 @@ class WSWrapper extends EventEmitter {
      this.emit('open')
    }

-    this._ws.onerror = error => {
+    this._ws.onerror = (error) => {
      this.emit('error', error)
    }

-    this._ws.onmessage = message => {
+    this._ws.onmessage = (message) => {
      this.emit('message', message.data)
    }
  }
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,8 @@
-export {RippleAPI} from './api'
+export * from './api'

-export {FormattedTransactionType} from './transaction/types'
+export * from './transaction/types'
+
+export * from './common/types/objects/ledger'

 // Broadcast api is experimental
 export {RippleAPIBroadcast} from './broadcast'
--- a/src/ledger/balance-sheet.ts
+++ b/src/ledger/balance-sheet.ts
@@ -24,7 +24,7 @@ function formatBalanceSheet(balanceSheet): GetBalanceSheet {
  if (!_.isUndefined(balanceSheet.balances)) {
    result.balances = []
    _.forEach(balanceSheet.balances, (balances, counterparty) => {
-      _.forEach(balances, balance => {
+      _.forEach(balances, (balance) => {
        result.balances.push(Object.assign({counterparty}, balance))
      })
    })
@@ -32,7 +32,7 @@ function formatBalanceSheet(balanceSheet): GetBalanceSheet {
  if (!_.isUndefined(balanceSheet.assets)) {
    result.assets = []
    _.forEach(balanceSheet.assets, (assets, counterparty) => {
-      _.forEach(assets, balance => {
+      _.forEach(assets, (balance) => {
        result.assets.push(Object.assign({counterparty}, balance))
      })
    })
--- a/src/ledger/balances.ts
+++ b/src/ledger/balances.ts
@@ -67,11 +67,11 @@ function getBalances(
    getLedgerVersionHelper(
      this.connection,
      options.ledgerVersion
-    ).then(ledgerVersion =>
+    ).then((ledgerVersion) =>
      utils.getXRPBalance(this.connection, address, ledgerVersion)
    ),
    this.getTrustlines(address, options)
-  ]).then(results =>
+  ]).then((results) =>
    formatBalances(options, {xrp: results[0], trustlines: results[1]})
  )
 }
--- a/src/ledger/orderbook.ts
+++ b/src/ledger/orderbook.ts
@@ -116,11 +116,11 @@ export async function getOrderbook(
  // 3. Return Formatted Response
  const directOffers = _.flatMap(
    directOfferResults,
-    directOfferResult => directOfferResult.offers
+    (directOfferResult) => directOfferResult.offers
  )
  const reverseOffers = _.flatMap(
    reverseOfferResults,
-    reverseOfferResult => reverseOfferResult.offers
+    (reverseOfferResult) => reverseOfferResult.offers
  )
  return formatBidsAndAsks(orderbook, [...directOffers, ...reverseOffers])
 }
--- a/src/ledger/orders.ts
+++ b/src/ledger/orders.ts
@@ -15,12 +15,12 @@ function formatResponse(
 ): FormattedAccountOrder[] {
  let orders: FormattedAccountOrder[] = []
  for (const response of responses) {
-    const offers = response.offers.map(offer => {
+    const offers = response.offers.map((offer) => {
      return parseAccountOrder(address, offer)
    })
    orders = orders.concat(offers)
  }
-  return _.sortBy(orders, order => order.properties.sequence)
+  return _.sortBy(orders, (order) => order.properties.sequence)
 }

 export default async function getOrders(
--- a/src/ledger/parse/account-delete.ts
+++ b/src/ledger/parse/account-delete.ts
@@ -1,6 +1,7 @@
 import * as assert from 'assert'
 import {removeUndefined} from '../../common'
 import {classicAddressToXAddress} from 'ripple-address-codec'
+import {parseMemos} from './utils'

 export type FormattedAccountDelete = {
  // account (address) of an account to receive any leftover XRP after deleting the sending account.
@@ -21,6 +22,7 @@ function parseAccountDelete(tx: any): FormattedAccountDelete {
  assert.ok(tx.TransactionType === 'AccountDelete')

  return removeUndefined({
+    memos: parseMemos(tx),
    destination: tx.Destination,
    destinationTag: tx.DestinationTag,
    destinationXAddress: classicAddressToXAddress(
--- a/src/ledger/parse/cancellation.ts
+++ b/src/ledger/parse/cancellation.ts
@@ -1,8 +1,10 @@
 import * as assert from 'assert'
+import {parseMemos} from './utils'

 function parseOrderCancellation(tx: any): object {
  assert.ok(tx.TransactionType === 'OfferCancel')
  return {
+    memos: parseMemos(tx),
    orderSequence: tx.OfferSequence
  }
 }
--- a/src/ledger/parse/check-cancel.ts
+++ b/src/ledger/parse/check-cancel.ts
@@ -1,5 +1,6 @@
 import * as assert from 'assert'
 import {removeUndefined} from '../../common'
+import {parseMemos} from './utils'

 export type FormattedCheckCancel = {
  // ID of the Check ledger object to cancel.
@@ -10,6 +11,7 @@ function parseCheckCancel(tx: any): FormattedCheckCancel {
  assert.ok(tx.TransactionType === 'CheckCancel')

  return removeUndefined({
+    memos: parseMemos(tx),
    checkID: tx.CheckID
  })
 }
--- a/src/ledger/parse/check-cash.ts
+++ b/src/ledger/parse/check-cash.ts
@@ -2,6 +2,7 @@ import * as assert from 'assert'
 import {removeUndefined} from '../../common'
 import parseAmount from './amount'
 import {Amount} from '../../common/types/objects'
+import {parseMemos} from './utils'

 export type FormattedCheckCash = {
  // ID of the Check ledger object to cash.
@@ -25,6 +26,7 @@ function parseCheckCash(tx: any): FormattedCheckCash {
  assert.ok(tx.TransactionType === 'CheckCash')

  return removeUndefined({
+    memos: parseMemos(tx),
    checkID: tx.CheckID,
    amount: tx.Amount && parseAmount(tx.Amount),
    deliverMin: tx.DeliverMin && parseAmount(tx.DeliverMin)
--- a/src/ledger/parse/check-create.ts
+++ b/src/ledger/parse/check-create.ts
@@ -3,6 +3,7 @@ import {parseTimestamp} from './utils'
 import {removeUndefined} from '../../common'
 import parseAmount from './amount'
 import {Amount} from '../../common/types/objects'
+import {parseMemos} from './utils'

 export type FormattedCheckCreate = {
  // account that can cash the check.
@@ -26,6 +27,7 @@ function parseCheckCreate(tx: any): FormattedCheckCreate {
  assert.ok(tx.TransactionType === 'CheckCreate')

  return removeUndefined({
+    memos: parseMemos(tx),
    destination: tx.Destination,
    sendMax: parseAmount(tx.SendMax),
    destinationTag: tx.DestinationTag,
--- a/src/ledger/parse/deposit-preauth.ts
+++ b/src/ledger/parse/deposit-preauth.ts
@@ -1,5 +1,6 @@
 import * as assert from 'assert'
 import {removeUndefined} from '../../common'
+import {parseMemos} from './utils'

 export type FormattedDepositPreauth = {
  // account (address) of the sender to preauthorize
@@ -13,6 +14,7 @@ function parseDepositPreauth(tx: any): FormattedDepositPreauth {
  assert.ok(tx.TransactionType === 'DepositPreauth')

  return removeUndefined({
+    memos: parseMemos(tx),
    authorize: tx.Authorize,
    unauthorize: tx.Unauthorize
  })
--- a/src/ledger/parse/fee-update.ts
+++ b/src/ledger/parse/fee-update.ts
@@ -1,9 +1,11 @@
 import BigNumber from 'bignumber.js'
 import {dropsToXrp} from '../../common'
+import {parseMemos} from './utils'

 function parseFeeUpdate(tx: any) {
  const baseFeeDrops = new BigNumber(tx.BaseFee, 16).toString()
  return {
+    memos: parseMemos(tx),
    baseFeeXRP: dropsToXrp(baseFeeDrops),
    referenceFeeUnits: tx.ReferenceFeeUnits,
    reserveBaseXRP: dropsToXrp(tx.ReserveBase),
--- a/src/ledger/parse/order.ts
+++ b/src/ledger/parse/order.ts
@@ -1,5 +1,6 @@
 import * as assert from 'assert'
 import {parseTimestamp} from './utils'
+import {parseMemos} from './utils'
 import parseAmount from './amount'
 import {removeUndefined, txFlags} from '../../common'
 import {
@@ -19,6 +20,7 @@ function parseOrder(tx: OfferCreateTransaction): FormattedOrderSpecification {
  const totalPrice = direction === 'buy' ? takerGetsAmount : takerPaysAmount

  return removeUndefined({
+    memos: parseMemos(tx),
    direction: direction,
    quantity: quantity,
    totalPrice: totalPrice,
--- a/src/ledger/parse/pathfind.ts
+++ b/src/ledger/parse/pathfind.ts
@@ -4,8 +4,8 @@ import {Amount, RippledAmount} from '../../common/types/objects'
 import {Path, GetPaths, RippledPathsResponse} from '../pathfind-types'

 function parsePaths(paths) {
-  return paths.map(steps =>
-    steps.map(step => _.omit(step, ['type', 'type_hex']))
+  return paths.map((steps) =>
+    steps.map((step) => _.omit(step, ['type', 'type_hex']))
  )
 }

@@ -58,7 +58,7 @@ function parsePathfind(pathfindResult: RippledPathsResponse): GetPaths {
  const sourceAddress = pathfindResult.source_account
  const destinationAddress = pathfindResult.destination_account
  const destinationAmount = pathfindResult.destination_amount
-  return pathfindResult.alternatives.map(alt =>
+  return pathfindResult.alternatives.map((alt) =>
    parseAlternative(sourceAddress, destinationAddress, destinationAmount, alt)
  )
 }
--- a/src/ledger/parse/payment-channel-claim.ts
+++ b/src/ledger/parse/payment-channel-claim.ts
@@ -1,12 +1,14 @@
 import * as assert from 'assert'
 import {removeUndefined, txFlags} from '../../common'
 import parseAmount from './amount'
+import {parseMemos} from './utils'
 const claimFlags = txFlags.PaymentChannelClaim

 function parsePaymentChannelClaim(tx: any): object {
  assert.ok(tx.TransactionType === 'PaymentChannelClaim')

  return removeUndefined({
+    memos: parseMemos(tx),
    channel: tx.Channel,
    balance: tx.Balance && parseAmount(tx.Balance).value,
    amount: tx.Amount && parseAmount(tx.Amount).value,
--- a/src/ledger/parse/payment-channel-create.ts
+++ b/src/ledger/parse/payment-channel-create.ts
@@ -1,5 +1,5 @@
 import * as assert from 'assert'
-import {parseTimestamp} from './utils'
+import {parseTimestamp,parseMemos} from './utils'
 import {removeUndefined} from '../../common'
 import parseAmount from './amount'

@@ -7,6 +7,7 @@ function parsePaymentChannelCreate(tx: any): object {
  assert.ok(tx.TransactionType === 'PaymentChannelCreate')

  return removeUndefined({
+    memos: parseMemos(tx),
    amount: parseAmount(tx.Amount).value,
    destination: tx.Destination,
    settleDelay: tx.SettleDelay,
--- a/src/ledger/parse/payment-channel-fund.ts
+++ b/src/ledger/parse/payment-channel-fund.ts
@@ -1,5 +1,5 @@
 import * as assert from 'assert'
-import {parseTimestamp} from './utils'
+import {parseTimestamp,parseMemos} from './utils'
 import {removeUndefined} from '../../common'
 import parseAmount from './amount'

@@ -7,6 +7,7 @@ function parsePaymentChannelFund(tx: any): object {
  assert.ok(tx.TransactionType === 'PaymentChannelFund')

  return removeUndefined({
+    memos: parseMemos(tx),
    channel: tx.Channel,
    amount: parseAmount(tx.Amount).value,
    expiration: tx.Expiration && parseTimestamp(tx.Expiration)
--- a/src/ledger/parse/payment-channel.ts
+++ b/src/ledger/parse/payment-channel.ts
@@ -1,4 +1,4 @@
-import {parseTimestamp} from './utils'
+import {parseTimestamp, parseMemos} from './utils'
 import {removeUndefined, dropsToXrp} from '../../common'
 import {PayChannelLedgerEntry} from '../../common/types/objects'

@@ -21,6 +21,7 @@ export function parsePaymentChannel(
  data: PayChannelLedgerEntry
 ): FormattedPaymentChannel {
  return removeUndefined({
+    memos: parseMemos(data),
    account: data.Account,
    amount: dropsToXrp(data.Amount),
    balance: dropsToXrp(data.Balance),
--- a/src/ledger/parse/settings.ts
+++ b/src/ledger/parse/settings.ts
@@ -6,7 +6,7 @@ import parseFields from './fields'

 function getAccountRootModifiedNode(tx: any) {
  const modifiedNodes = tx.meta.AffectedNodes.filter(
-    node => node.ModifiedNode.LedgerEntryType === 'AccountRoot'
+    (node) => node.ModifiedNode.LedgerEntryType === 'AccountRoot'
  )
  assert.ok(modifiedNodes.length === 1)
  return modifiedNodes[0].ModifiedNode
--- a/src/ledger/parse/ticket-create.ts
+++ b/src/ledger/parse/ticket-create.ts
@@ -0,0 +1,13 @@
+import * as assert from 'assert'
+import {removeUndefined} from '../../common'
+import {parseMemos} from './utils'
+
+function parseTicketCreate(tx: any): object {
+  assert.ok(tx.TransactionType === 'TicketCreate')
+  return removeUndefined({
+    memos: parseMemos(tx),
+    ticketCount: tx.TicketCount
+  })
+}
+
+export default parseTicketCreate
--- a/src/ledger/parse/transaction.ts
+++ b/src/ledger/parse/transaction.ts
@@ -16,6 +16,7 @@ import parsePayment from './payment'
 import parsePaymentChannelClaim from './payment-channel-claim'
 import parsePaymentChannelCreate from './payment-channel-create'
 import parsePaymentChannelFund from './payment-channel-fund'
+import parseTicketCreate from './ticket-create'
 import parseTrustline from './trustline'

 import parseAmendment from './amendment' // pseudo-transaction
@@ -41,6 +42,7 @@ function parseTransactionType(type) {
    PaymentChannelFund: 'paymentChannelFund',
    SetRegularKey: 'settings',
    SignerListSet: 'settings',
+    TicketCreate: 'ticketCreate',
    TrustSet: 'trustline',

    EnableAmendment: 'amendment', // pseudo-transaction
@@ -68,6 +70,7 @@ function parseTransaction(tx: any, includeRawTransaction: boolean): any {
    paymentChannelClaim: parsePaymentChannelClaim,
    paymentChannelCreate: parsePaymentChannelCreate,
    paymentChannelFund: parsePaymentChannelFund,
+    ticketCreate: parseTicketCreate,
    trustline: parseTrustline,

    amendment: parseAmendment, // pseudo-transaction
--- a/src/ledger/parse/utils.ts
+++ b/src/ledger/parse/utils.ts
@@ -42,14 +42,14 @@ function removeEmptyCounterparty(amount) {
 }

 function removeEmptyCounterpartyInBalanceChanges(balanceChanges) {
-  _.forEach(balanceChanges, changes => {
+  _.forEach(balanceChanges, (changes) => {
    _.forEach(changes, removeEmptyCounterparty)
  })
 }

 function removeEmptyCounterpartyInOrderbookChanges(orderbookChanges) {
-  _.forEach(orderbookChanges, changes => {
-    _.forEach(changes, change => {
+  _.forEach(orderbookChanges, (changes) => {
+    _.forEach(changes, (change) => {
      _.forEach(change, removeEmptyCounterparty)
    })
  })
@@ -132,7 +132,7 @@ function parseMemos(tx: any): Array<Memo> | undefined {
  if (!Array.isArray(tx.Memos) || tx.Memos.length === 0) {
    return undefined
  }
-  return tx.Memos.map(m => {
+  return tx.Memos.map((m) => {
    return common.removeUndefined({
      type: m.Memo.parsed_memo_type || hexToString(m.Memo.MemoType),
      format: m.Memo.parsed_memo_format || hexToString(m.Memo.MemoFormat),
--- a/src/ledger/pathfind.ts
+++ b/src/ledger/pathfind.ts
@@ -62,7 +62,7 @@ function requestPathFind(
    request.destination_amount.issuer = request.destination_account
  }
  if (pathfind.source.currencies && pathfind.source.currencies.length > 0) {
-    request.source_currencies = pathfind.source.currencies.map(amount =>
+    request.source_currencies = pathfind.source.currencies.map((amount) =>
      renameCounterpartyToIssuer(amount)
    )
  }
@@ -79,7 +79,7 @@ function requestPathFind(
    }
  }

-  return connection.request(request).then(paths => addParams(request, paths))
+  return connection.request(request).then((paths) => addParams(request, paths))
 }

 function addDirectXrpPath(
@@ -116,7 +116,7 @@ function conditionallyAddDirectXRPPath(
  ) {
    return Promise.resolve(paths)
  }
-  return getXRPBalance(connection, address, undefined).then(xrpBalance =>
+  return getXRPBalance(connection, address, undefined).then((xrpBalance) =>
    addDirectXrpPath(paths, xrpBalance)
  )
 }
@@ -130,7 +130,7 @@ function filterSourceFundsLowPaths(
    pathfind.destination.amount.value === undefined &&
    paths.alternatives
  ) {
-    paths.alternatives = _.filter(paths.alternatives, alt => {
+    paths.alternatives = _.filter(paths.alternatives, (alt) => {
      if (!alt.source_amount) {
        return false
      }
@@ -191,11 +191,11 @@ function getPaths(this: RippleAPI, pathfind: PathFind): Promise<GetPaths> {

  const address = pathfind.source.address
  return requestPathFind(this.connection, pathfind)
-    .then(paths =>
+    .then((paths) =>
      conditionallyAddDirectXRPPath(this.connection, address, paths)
    )
-    .then(paths => filterSourceFundsLowPaths(pathfind, paths))
-    .then(paths => formatResponse(pathfind, paths))
+    .then((paths) => filterSourceFundsLowPaths(pathfind, paths))
+    .then((paths) => formatResponse(pathfind, paths))
 }

 export default getPaths
--- a/src/ledger/settings.ts
+++ b/src/ledger/settings.ts
@@ -4,17 +4,18 @@ import {validate, constants, ensureClassicAddress} from '../common'
 import {FormattedSettings} from '../common/types/objects'
 import {AccountInfoResponse} from '../common/types/commands'
 import {RippleAPI} from '..'
+import {Settings} from '../common/constants'

 const AccountFlags = constants.AccountFlags

 export type SettingsOptions = {
-  ledgerVersion?: number
+  ledgerVersion?: number | 'validated' | 'closed' | 'current'
 }

 export function parseAccountFlags(
  value: number,
  options: {excludeFalse?: boolean} = {}
-) {
+): Settings {
  const settings = {}
  for (const flagName in AccountFlags) {
    if (value & AccountFlags[flagName]) {
--- a/src/ledger/transaction.ts
+++ b/src/ledger/transaction.ts
@@ -48,13 +48,13 @@ function attachTransactionDate(

  return connection
    .request(request)
-    .then(data => {
+    .then((data) => {
      if (typeof data.ledger.close_time === 'number') {
        return _.assign({date: data.ledger.close_time}, tx)
      }
      throw new errors.UnexpectedError('Ledger missing close_time')
    })
-    .catch(error => {
+    .catch((error) => {
      if (error instanceof errors.UnexpectedError) {
        throw error
      }
@@ -95,11 +95,11 @@ function convertError(
        options.minLedgerVersion,
        options.maxLedgerVersion
      )
-      .then(hasCompleteLedgerRange => {
+      .then((hasCompleteLedgerRange) => {
        if (!hasCompleteLedgerRange) {
          return utils
            .isPendingLedgerVersion(connection, options.maxLedgerVersion)
-            .then(isPendingLedgerVersion => {
+            .then((isPendingLedgerVersion) => {
              return isPendingLedgerVersion
                ? new errors.PendingLedgerVersionError()
                : new errors.MissingLedgerHistoryError()
--- a/src/ledger/transactions.ts
+++ b/src/ledger/transactions.ts
@@ -101,12 +101,12 @@ function formatPartialResponse(
  options: TransactionsOptions,
  data
 ) {
-  const parse = tx =>
+  const parse = (tx) =>
    parseAccountTxTransaction(tx, options.includeRawTransactions)
  return {
    marker: data.marker,
    results: data.transactions
-      .filter(tx => tx.validated)
+      .filter((tx) => tx.validated)
      .map(parse)
      .filter(_.partial(transactionFilter, address, options))
      .filter(_.partial(orderFilter, options))
@@ -135,7 +135,7 @@ function getAccountTx(

  return connection
    .request(request)
-    .then(response => formatPartialResponse(address, options, response))
+    .then((response) => formatPartialResponse(address, options, response))
 }

 function checkForLedgerGaps(
@@ -158,7 +158,7 @@ function checkForLedgerGaps(

  return utils
    .hasCompleteLedgerRange(connection, minLedgerVersion, maxLedgerVersion)
-    .then(hasCompleteLedgerRange => {
+    .then((hasCompleteLedgerRange) => {
      if (!hasCompleteLedgerRange) {
        throw new errors.MissingLedgerHistoryError()
      }
@@ -204,7 +204,7 @@ function getTransactions(

  const defaults = {maxLedgerVersion: -1}
  if (options.start) {
-    return getTransaction.call(this, options.start).then(tx => {
+    return getTransaction.call(this, options.start).then((tx) => {
      const ledgerVersion = tx.outcome.ledgerVersion
      const bound = options.earliestFirst
        ? {minLedgerVersion: ledgerVersion}
--- a/src/ledger/trustlines.ts
+++ b/src/ledger/trustlines.ts
@@ -36,8 +36,8 @@ async function getTrustlines(
    peer: options.counterparty
  })
  // 3. Return Formatted Response
-  const trustlines = _.flatMap(responses, response => response.lines)
-  return trustlines.map(parseAccountTrustline).filter(trustline => {
+  const trustlines = _.flatMap(responses, (response) => response.lines)
+  return trustlines.map(parseAccountTrustline).filter((trustline) => {
    return currencyFilter(options.currency || null, trustline)
  })
 }
--- a/src/ledger/utils.ts
+++ b/src/ledger/utils.ts
@@ -30,7 +30,7 @@ function getXRPBalance(
  }
  return connection
    .request(request)
-    .then(data => common.dropsToXrp(data.account_data.Balance))
+    .then((data) => common.dropsToXrp(data.account_data.Balance))
 }

 // If the marker is omitted from a response, you have reached the end
@@ -39,10 +39,10 @@ function getRecursiveRecur(
  marker: string | undefined,
  limit: number
 ): Promise<Array<any>> {
-  return getter(marker, limit).then(data => {
+  return getter(marker, limit).then((data) => {
    const remaining = limit - data.results.length
    if (remaining > 0 && data.marker !== undefined) {
-      return getRecursiveRecur(getter, data.marker, remaining).then(results =>
+      return getRecursiveRecur(getter, data.marker, remaining).then((results) =>
        data.results.concat(results)
      )
    }
@@ -118,7 +118,7 @@ function isPendingLedgerVersion(
 ): Promise<boolean> {
  return connection
    .getLedgerVersion()
-    .then(ledgerVersion => ledgerVersion < (maxLedgerVersion || 0))
+    .then((ledgerVersion) => ledgerVersion < (maxLedgerVersion || 0))
 }

 function ensureLedgerVersion(this: RippleAPI, options: any): Promise<object> {
@@ -129,7 +129,7 @@ function ensureLedgerVersion(this: RippleAPI, options: any): Promise<object> {
  ) {
    return Promise.resolve(options)
  }
-  return this.getLedgerVersion().then(ledgerVersion =>
+  return this.getLedgerVersion().then((ledgerVersion) =>
    _.assign({}, options, {ledgerVersion})
  )
 }
--- a/src/offline/generate-address.ts
+++ b/src/offline/generate-address.ts
@@ -28,7 +28,16 @@ export interface GenerateAddressOptions {
 function generateAddressAPI(options: GenerateAddressOptions): GeneratedAddress {
  validate.generateAddress({options})
  try {
-    const secret = keypairs.generateSeed(options)
+    const generateSeedOptions: {
+      entropy?: Uint8Array
+      algorithm?: 'ecdsa-secp256k1' | 'ed25519'
+    } = {
+      algorithm: options.algorithm
+    }
+    if (options.entropy) {
+      generateSeedOptions.entropy = Uint8Array.from(options.entropy)
+    }
+    const secret = keypairs.generateSeed(generateSeedOptions)
    const keypair = keypairs.deriveKeypair(secret)
    const classicAddress = keypairs.deriveAddress(keypair.publicKey)
    const returnValue: any = {
--- a/src/offline/ledgerhash.ts
+++ b/src/offline/ledgerhash.ts
@@ -38,7 +38,7 @@ function computeTransactionHash(
    transactions = JSON.parse(ledger.rawTransactions)
  } else if (ledger.transactions) {
    try {
-      transactions = ledger.transactions.map(tx =>
+      transactions = ledger.transactions.map((tx) =>
        JSON.parse(tx.rawTransaction)
      )
    } catch (e) {
@@ -60,7 +60,7 @@ function computeTransactionHash(
    }
    return ledger.transactionHash
  }
-  const txs = _.map(transactions, tx => {
+  const txs = _.map(transactions, (tx) => {
    const mergeTx = _.assign({}, _.omit(tx, 'tx'), tx.tx || {})
    // rename `meta` back to `metaData`
    const renameMeta = _.assign(
--- a/src/offline/verify-payment-channel-claim.ts
+++ b/src/offline/verify-payment-channel-claim.ts
@@ -7,7 +7,7 @@ function verifyPaymentChannelClaim(
  amount: string,
  signature: string,
  publicKey: string
-): string {
+): boolean {
  validate.verifyPaymentChannelClaim({channel, amount, signature, publicKey})

  const signingData = binary.encodeForSigningClaim({
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -9,12 +9,14 @@ function getLedgerVersion(this: RippleAPI): Promise<number> {
  return this.connection.getLedgerVersion()
 }

-function connect(this: RippleAPI): Promise<void> {
+async function connect(this: RippleAPI): Promise<void> {
  return this.connection.connect()
 }

-function disconnect(this: RippleAPI): Promise<void> {
-  return this.connection.disconnect()
+async function disconnect(this: RippleAPI): Promise<void> {
+  // backwards compatibility: connection.disconnect() can return a number, but
+  // this method returns nothing. SO we await but don't return any result.
+  await this.connection.disconnect()
 }

 function formatLedgerClose(ledgerClose: any): object {
--- a/src/transaction/combine.ts
+++ b/src/transaction/combine.ts
@@ -24,7 +24,7 @@ function combine(signedTransactions: Array<string>): object {
  // tests and this code handle it as an array of objects. Fix!
  const txs: any[] = _.map(signedTransactions, binary.decode)
  const tx = _.omit(txs[0], 'Signers')
-  if (!_.every(txs, _tx => _.isEqual(tx, _.omit(_tx, 'Signers')))) {
+  if (!_.every(txs, (_tx) => _.isEqual(tx, _.omit(_tx, 'Signers')))) {
    throw new utils.common.errors.ValidationError(
      'txJSON is not the same for all signedTransactions'
    )
--- a/src/transaction/payment.ts
+++ b/src/transaction/payment.ts
@@ -76,8 +76,8 @@ function applyAnyCounterpartyEncoding(payment: Payment): void {
  // Convert blank counterparty to sender or receiver's address
  //   (Ripple convention for 'any counterparty')
  // https://developers.ripple.com/payment.html#special-issuer-values-for-sendmax-and-amount
-  _.forEach([payment.source, payment.destination], adjustment => {
-    _.forEach(['amount', 'minAmount', 'maxAmount'], key => {
+  _.forEach([payment.source, payment.destination], (adjustment) => {
+    _.forEach(['amount', 'minAmount', 'maxAmount'], (key) => {
      if (isIOUWithoutCounterparty(adjustment[key])) {
        adjustment[key].counterparty = adjustment.address
      }
@@ -87,7 +87,13 @@ function applyAnyCounterpartyEncoding(payment: Payment): void {

 function createMaximalAmount(amount: Amount): Amount {
  const maxXRPValue = '100000000000'
-  const maxIOUValue = '9999999999999999e80'
+
+  // Equivalent to '9999999999999999e80' but we cannot use that because sign()
+  // now checks that the encoded representation exactly matches the transaction
+  // as it was originally provided.
+  const maxIOUValue =
+    '999999999999999900000000000000000000000000000000000000000000000000000000000000000000000000000000'
+
  let maxValue
  if (amount.currency === 'XRP') {
    maxValue = maxXRPValue
--- a/src/transaction/settings.ts
+++ b/src/transaction/settings.ts
@@ -55,9 +55,7 @@ function setTransactionFields(

    if (field.encoding === 'hex' && !field.length) {
      // This is currently only used for Domain field
-      value = Buffer.from(value, 'ascii')
-        .toString('hex')
-        .toUpperCase()
+      value = Buffer.from(value, 'ascii').toString('hex').toUpperCase()
    }

    txJSON[fieldName] = value
--- a/src/transaction/sign.ts
+++ b/src/transaction/sign.ts
@@ -56,11 +56,8 @@ function signWithKeypair(
      keypair.privateKey
    )
  }
-
  const serialized = binaryCodec.encode(txToSignAndEncode)
-
  checkTxSerialization(serialized, tx)
-
  return {
    signedTransaction: serialized,
    id: computeBinaryTransactionHash(serialized)
@@ -79,7 +76,7 @@ function objectDiff(a: object, b: object): object {
  const diffs = {}

  // Compare two items and push non-matches to object
-  const compare = function(i1: any, i2: any, k: string): void {
+  const compare = function (i1: any, i2: any, k: string): void {
    const type1 = Object.prototype.toString.call(i1)
    const type2 = Object.prototype.toString.call(i2)
    if (type2 === '[object Undefined]') {
--- a/src/transaction/submit.ts
+++ b/src/transaction/submit.ts
@@ -1,3 +1,9 @@
+// Deprecated - use api.request instead:
+//   const response = await api.request('submit', {
+//     tx_blob: signedTransaction,
+//     fail_hard: failHard
+//   });
+
 import * as _ from 'lodash'
 import * as utils from './utils'
 import {validate} from '../common'
@@ -36,14 +42,19 @@ function formatSubmitResponse(response): FormattedSubmitResponse {
  return data
 }

+// @deprecated Use api.request('submit', { tx_blob: signedTransaction }) instead
 async function submit(
  this: RippleAPI,
-  signedTransaction: string
+  signedTransaction: string,
+  failHard?: boolean
 ): Promise<FormattedSubmitResponse> {
  // 1. Validate
  validate.submit({signedTransaction})
  // 2. Make Request
-  const response = await this.request('submit', {tx_blob: signedTransaction})
+  const response = await this.request('submit', {
+    tx_blob: signedTransaction,
+    ...(failHard ? {fail_hard: failHard} : {})
+  })
  // 3. Return Formatted Response
  return formatSubmitResponse(response)
 }
--- a/src/transaction/ticket.ts
+++ b/src/transaction/ticket.ts
@@ -0,0 +1,45 @@
+import * as _ from 'lodash'
+import * as utils from './utils'
+import {Prepare, TransactionJSON, Instructions} from './types'
+import {RippleAPI} from '..'
+
+const validate = utils.common.validate
+const ValidationError = utils.common.errors.ValidationError
+
+export interface Ticket {
+  account: string
+  sequence: number
+}
+
+function createTicketTransaction(
+  account: string,
+  ticketCount: number
+): TransactionJSON {
+  if (!ticketCount || ticketCount === 0)
+    throw new ValidationError('Ticket count must be greater than 0.')
+
+  const txJSON: any = {
+    TransactionType: 'TicketCreate',
+    Account: account,
+    TicketCount: ticketCount
+  }
+
+  return txJSON
+}
+
+function prepareTicketCreate(
+  this: RippleAPI,
+  address: string,
+  ticketCount: number,
+  instructions: Instructions = {}
+): Promise<Prepare> {
+  try {
+    validate.prepareTicketCreate({address, ticketCount, instructions})
+    const txJSON = createTicketTransaction(address, ticketCount)
+    return utils.prepareTransaction(txJSON, this, instructions)
+  } catch (e) {
+    return Promise.reject(e)
+  }
+}
+
+export default prepareTicketCreate
--- a/Show More
+++ b/Show More