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var BlocktrailSDK = require('../api_client'); |
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var _ = require('lodash'); |
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var q = require('q'); |
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var async = require('async'); |
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/** |
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* |
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* @param options |
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* @constructor |
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*/ |
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var BlocktrailBitcoinService = function(options) { |
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this.defaultSettings = { |
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apiKey: null, |
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apiSecret: null, |
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network: 'BTC', |
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testnet: false, |
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retryLimit: 5, |
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retryDelay: 20, |
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paginationLimit: 200 //max records to return per page |
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}; |
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this.settings = _.merge({}, this.defaultSettings, options); |
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//normalise the network settings |
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var networkSettings = this.normaliseNetwork(this.settings.network, this.settings.testnet); |
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this.settings.network = networkSettings.network; |
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this.settings.testnet = networkSettings.testnet; |
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this.client = new BlocktrailSDK(this.settings); |
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}; |
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BlocktrailBitcoinService.prototype.normaliseNetwork = function(network, testnet) { |
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switch (network.toLowerCase()) { |
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case 'btc': |
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case 'bitcoin': |
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if (testnet) { |
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return {network: "BTC", testnet: true}; |
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} else { |
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return {network: "BTC", testnet: false}; |
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} |
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break; |
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case 'tbtc': |
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case 'bitcoin-testnet': |
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return {network: "BTC", testnet: true}; |
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case 'bcc': |
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if (testnet) { |
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return {network: "BCC", testnet: true}; |
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} else { |
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return {network: "BCC", testnet: false}; |
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} |
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break; |
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case 'tbcc': |
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return {network: "BCC", testnet: true}; |
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default: |
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throw new Error("Unknown network " + network); |
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} |
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}; |
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BlocktrailBitcoinService.prototype.setPaginationLimit = function(limit) { |
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this.settings.paginationLimit = limit; |
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}; |
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BlocktrailBitcoinService.prototype.estimateFee = function() { |
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var self = this; |
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64
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65
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return self.client.feePerKB().then(function(r) { |
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return Math.max(r['optimal'], r['min_relay_fee']); |
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}); |
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}; |
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/** |
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* gets unspent outputs for a batch of addresses, returning an array of outputs with hash, index, |
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* value, and script pub hex mapped to each corresponding address |
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* |
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* @param {array} addresses array of addresses |
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* @returns {q.Promise} promise resolves with array of unspent outputs mapped to addresses as |
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* { address: [{"hash": hash, "index": index, "value": value, "script_hex": scriptHex}]} |
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*/ |
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BlocktrailBitcoinService.prototype.getBatchUnspentOutputs = function(addresses) { |
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var self = this; |
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var deferred = q.defer(); |
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var batchResults = {}; //utxos mapped to addresses |
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async.forEachSeries(function(address, cb) { |
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var page = 1; |
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var results = null; |
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var utxos = []; |
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async.doWhilst(function(done) { |
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//do |
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var params = { |
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page: page, |
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limit: self.settings.paginationLimit |
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}; |
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self.client.addressUnspentOutputs(address, params).then(function(results) { |
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utxos = utxos.concat(results['data']); |
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page++; |
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done(); |
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}, function(err) { |
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console.log('error happened:', err); |
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done(err); |
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102
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}); |
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}, function() { |
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//while |
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return results && results['data'].length > 0; |
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}, function(err) { |
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//all done |
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if (err) { |
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console.log("complete, but with errors", err.message); |
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110
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} |
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//reduce the returned data into the values we're interested in, and map to the relevant addresses |
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utxos.forEach(function(utxo) { |
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var address = utxo['address']; |
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if (typeof batchResults[address] === "undefined") { |
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batchResults[address] = []; |
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} |
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batchResults[address].push({ |
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'hash': utxo['hash'], |
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'index': utxo['index'], |
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'value': utxo['value'], |
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'script_hex': utxo['script_hex'] |
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}); |
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}); |
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cb(); |
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}); |
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131
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}, addresses, function() { |
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deferred.resolve(batchResults); |
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}); |
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135
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//get unspent outputs for the current chunk of addresses - required data: hash, index, value, and script hex, |
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async.doWhilst(function(done) { |
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//do |
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var params = { |
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page: page, |
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140
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limit: self.settings.paginationLimit |
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}; |
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self.client.batchAddressUnspentOutputs(addresses, params).then(function(results) { |
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utxos = utxos.concat(results['data']); |
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page++; |
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145
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done(); |
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146
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}, function(err) { |
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147
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console.log('error happened:', err); |
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148
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done(err); |
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149
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}); |
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150
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}, function() { |
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151
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//while |
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152
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return results && results['data'].length > 0; |
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153
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}, function(err) { |
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154
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//all done |
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155
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if (err) { |
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156
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console.log("complete, but with errors", err.message); |
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157
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} |
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158
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159
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var batchResults = {}; //utxos mapped to addresses |
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160
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//reduce the returned data into the values we're interested in, and map to the relevant addresses |
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utxos.forEach(function(utxo) { |
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var address = utxo['address']; |
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164
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if (typeof batchResults[address] === "undefined") { |
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batchResults[address] = []; |
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} |
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168
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batchResults[address].push({ |
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'hash': utxo['hash'], |
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'index': utxo['index'], |
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'value': utxo['value'], |
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'script_hex': utxo['script_hex'] |
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}); |
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174
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}); |
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deferred.resolve(batchResults); |
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}); |
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177
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178
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return deferred.promise; |
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179
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}; |
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180
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181
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/** |
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182
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* @param {array} addresses array of addresses |
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183
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* @returns {q.Promise} |
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184
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*/ |
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185
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BlocktrailBitcoinService.prototype.batchAddressHasTransactions = function(addresses) { |
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186
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var self = this; |
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187
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188
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return self.client.batchAddressHasTransactions(addresses) |
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189
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.then(function(result) { |
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190
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return result.has_transactions; |
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191
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}); |
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192
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}; |
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193
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194
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module.exports = BlocktrailBitcoinService; |
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blocktrail /
blocktrail-sdk-nodejs
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