Update getBalances to use getTrustlines

src/api/common/index.js

@@ -10,5 +10,6 @@ module.exports = {
   dropsToXrp: utils.dropsToXrp,
   xrpToDrops: utils.xrpToDrops,
   toRippledAmount: utils.toRippledAmount,
-  wrapCatch: utils.wrapCatch
+  wrapCatch: utils.wrapCatch,
+  composeAsync: utils.composeAsync
 };

src/api/common/utils.js

@@ -31,9 +31,20 @@ function wrapCatch(asyncFunction: () => void): () => void {
   };
 }
 
+function composeAsync(wrapper, callback) {
+  return function(error, data) {
+    if (error) {
+      callback(error);
+      return;
+    }
+    callback(null, wrapper(data));
+  };
+}
+
 module.exports = {
   dropsToXrp,
   xrpToDrops,
   toRippledAmount,
-  wrapCatch
+  wrapCatch,
+  composeAsync
 };

src/api/ledger/balances.js

@@ -1,164 +1,43 @@
-/* globals Promise: true */
-/* eslint-disable valid-jsdoc */
 'use strict';
+const _ = require('lodash');
+const async = require('async');
 const utils = require('./utils');
+const getTrustlines = require('./trustlines').getTrustlines;
 const validate = utils.common.validate;
+const composeAsync = utils.common.composeAsync;
+const dropsToXrp = utils.common.dropsToXrp;
 
-const DefaultPageLimit = 200;
+function getXRPBalance(remote, address, ledgerVersion, callback) {
+  remote.requestAccountInfo({account: address, ledger: ledgerVersion},
+    composeAsync((data) => dropsToXrp(data.account_data.Balance), callback));
+}
+
+function parseBalanceAmount(trustline) {
+  return {
+    currency: trustline.specification.currency,
+    counterparty: trustline.specification.counterparty,
+    value: trustline.state.balance
+  };
+}
+
+function formatBalances(balances) {
+  const xrpBalance = {
+    currency: 'XRP',
+    value: balances[0]
+  };
+  return [xrpBalance].concat(balances[1].map(parseBalanceAmount));
+}
 
-/**
- *  Request the balances for a given account
- *
- *  Notes:
- *  In order to use paging, you must provide at least ledger as a query
- *  parameter.  Additionally, any limit lower than 10 will be bumped up to 10.
- *
- *  @url
- *  @param {RippleAddress} request.params.account
- *          - account to retrieve balances for
- *
- *  @query
- *  @param {String ISO 4217 Currency Code} [request.query.currency]
- *          - only request balances with given currency
- *  @param {RippleAddress} [request.query.counterparty]
- *          - only request balances with given counterparty
- *  @param {String} [request.query.marker] - start position in response paging
- *  @param {Number String} [request.query.limit] - max results per response
- *  @param {Number String} [request.query.ledger] - identifier
- *
- */
 function getBalances(account, options, callback) {
   validate.address(account);
   validate.options(options);
 
-  const self = this;
+  const ledgerVersion = options.ledgerVersion
-
+                      || this.remote.getLedgerSequence();
-  const currencyRE = new RegExp(options.currency ?
+  async.parallel([
-    ('^' + options.currency.toUpperCase() + '$') : /./);
+    _.partial(getXRPBalance, this.remote, account, ledgerVersion),
-
+    _.partial(getTrustlines.bind(this), account, options)
-  function getXRPBalance() {
+  ], composeAsync(formatBalances, callback));
-    const promise = new Promise(function(resolve, reject) {
-      const accountInfoRequest = self.remote.requestAccountInfo({
-        account: account,
-        ledger: utils.parseLedger(options.ledger)
-      });
-
-      const lines = [];
-      accountInfoRequest.once('error', reject);
-      accountInfoRequest.once('success', function(result) {
-        lines.push({
-          value: utils.common.dropsToXrp(result.account_data.Balance),
-          currency: 'XRP',
-          counterparty: ''
-        });
-
-        result.lines = lines;
-        resolve(result);
-      });
-
-      accountInfoRequest.request();
-    });
-
-    return promise;
-  }
-
-  function getLineBalances(prevResult) {
-    const isAggregate = options.limit === undefined;
-    if (prevResult && (!isAggregate || !prevResult.marker)) {
-      return Promise.resolve(prevResult);
-    }
-
-    const promise = new Promise(function(resolve, reject) {
-      let accountLinesRequest;
-      let marker;
-      let ledger;
-      let limit;
-
-      if (prevResult) {
-        marker = prevResult.marker;
-        limit = prevResult.limit;
-        ledger = prevResult.ledger_index;
-      } else {
-        marker = options.marker;
-        limit = options.limit || DefaultPageLimit;
-        ledger = utils.parseLedger(options.ledger);
-      }
-
-      accountLinesRequest = self.remote.requestAccountLines({
-        account: account,
-        marker: marker,
-        limit: limit,
-        ledger: ledger
-      });
-
-      if (options.counterparty) {
-        accountLinesRequest.message.peer = options.counterparty;
-      }
-
-      accountLinesRequest.once('error', reject);
-      accountLinesRequest.once('success', function(nextResult) {
-        const lines = [];
-        nextResult.lines.forEach(function(line) {
-          if (options.frozen && !line.freeze) {
-            return;
-          }
-
-          if (currencyRE.test(line.currency)) {
-            lines.push({
-              value: line.balance,
-              currency: line.currency,
-              counterparty: line.account
-            });
-          }
-        });
-
-        nextResult.lines = prevResult ? prevResult.lines.concat(lines) : lines;
-        resolve(nextResult);
-      });
-      accountLinesRequest.request();
-    });
-
-    return promise.then(getLineBalances);
-  }
-
-  function getAccountBalances() {
-    if (options.counterparty || options.frozen) {
-      return getLineBalances();
-    }
-
-    if (options.currency) {
-      if (options.currency === 'XRP') {
-        return getXRPBalance();
-      }
-      return getLineBalances();
-    }
-
-    return Promise.all([getXRPBalance(), getLineBalances()])
-    .then(function(values) {
-      const xrpBalance = values[0].lines[0];
-      const lineBalances = values[1];
-      lineBalances.lines.unshift(xrpBalance);
-      return Promise.resolve(lineBalances);
-    });
-  }
-
-  function respondWithBalances(result) {
-    let balances = {};
-
-    if (result.marker) {
-      balances.marker = result.marker;
-    }
-
-    balances.limit = result.limit;
-    balances.ledger = result.ledger_index;
-    balances.balances = result.lines;
-
-    callback(null, balances);
-  }
-
-  getAccountBalances()
-  .then(respondWithBalances)
-  .catch(callback);
 }
 
 module.exports.getBalances = getBalances;

test/fixtures/balances-response.json

@@ -1,11 +1,7 @@
-{
+[
-  "limit": 200,
-  "ledger": 8819951,
-  "balances": [
   {
     "value": "922.913243",
-      "currency": "XRP",
+    "currency": "XRP"
-      "counterparty": ""
   },
   {
     "value": "0",
@@ -127,5 +123,4 @@
     "currency": "USD",
     "counterparty": "rEhDDUUNxpXgEHVJtC2cjXAgyx5VCFxdMF"
   }
-  ]
+]
-}