bitcoinjs-lib/test/integration/_blockchain.js

var async = require('async')
var Blockchain = require('cb-http-client')
var httpify = require('httpify')

var BLOCKTRAIL_API_KEY = process.env.BLOCKTRAIL_API_KEY || 'c0bd8155c66e3fb148bb1664adc1e4dacd872548'

var mainnet = new Blockchain('https://api.blocktrail.com/cb/v0.2.1/BTC', { api_key: BLOCKTRAIL_API_KEY })
var testnet = new Blockchain('https://api.blocktrail.com/cb/v0.2.1/tBTC', { api_key: BLOCKTRAIL_API_KEY })

testnet.faucet = function faucet (address, amount, done) {
  var unspents = []

  async.whilst(
    function condition () { return unspents.length === 0 },
    function f (callback) {
      httpify({
        method: 'POST',
        url: 'https://api.blocktrail.com/v1/tBTC/faucet/withdrawl?api_key=' + BLOCKTRAIL_API_KEY,
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          address: address,
          amount: amount
        })
      }, function (err) {
        if (err) return callback(err)

        testnet.addresses.unspents(address, function (err, result) {
          if (err) return callback(err)

          // filter small unspents
          unspents = result.filter(function (unspent) {
            return unspent.value > 1e3
          })

          callback()
        })
      })
    },
    function (err) {
      if (err) return done(err)

      done(null, unspents)
    }
  )
}

module.exports = {
  m: mainnet,
  t: testnet
}