bitcoin-js是否具有检查未用交易状态的方法？

Question

BlockCypher explorer如何获取有关已用或未用交易状态的数据？

{0: [1], 1: [0, 8, 2], 2: [8, 1, 4, 5], 8: [1, 2, 9, 10, 11, 12], 3: [4], 4: [2, 3], 5: [2, 6, 7], 6: [5, 7], 7: [5, 6], 9: [8, 10, 11, 12], 10: [8, 9, 11, 12], 11: [8, 9, 10, 12], 12: [8, 9, 10, 11] } 库是否有一些方法？

Answer 1

我不确定bitcoin-js lib，但是Blockcypher具有API方法：

const fetch = require('cross-fetch')

const getAddress = async address => {
  const url = `https://api.blockcypher.com/v1/btc/test3/addrs/${address}`
  const res = await fetch(url)

  return await res.json()
}

getAddress('mitTmNgXyoEANondxZns8dS6GcXTzVhJW6')
  .then(({txrefs}) => txrefs.filter(tx => tx.spent === false))
  .then(data => console.log(data))

您会得到类似的东西

[ { tx_hash: 'bdbd9253b052cb17afdf42c006c69f6d9f7513d2176db1c088fdbd2381edf2de',
    block_height: 1519165,
    tx_input_n: -1,
    tx_output_n: 1,
    value: 15800000,
    ref_balance: 32343852,
    spent: false, // @docs tx status
    confirmations: 60,
    confirmed: '2019-05-31T20:43:22Z',
    double_spend: false },
  { tx_hash: '4014e09c48ec4de6c4f1e82b38107f4ca77037e96e4989abe5ba5cf459d57700',
    block_height: 1519149,
    tx_input_n: -1,
    tx_output_n: 1,
    value: 10000,
    ref_balance: 17044852,
    spent: false, // @docs tx status
    confirmations: 76,
    confirmed: '2019-05-31T18:43:02Z',
    double_spend: false } ]