如何使用bitcoinjs对BlockCypher事务进行签名

Question

我正在尝试使用here中描述的比特币引擎在比特币测试网上签署一项BlockCypher交易，但我一直收到错误：

{"error": "Couldn't deserialize request: invalid character 'x' in literal true (expecting 'r')"}

我已经到处搜索了，但找不到关于问题所在的文档。下面是我用来尝试和签署事务的代码。

var bitcoin = require("bitcoinjs-lib");
var buffer  = require('buffer');
var keys    = new bitcoin.ECPair.fromWIF('cMvPQZiG5mLARSjxbBwMxKwzhTHaxgpTsXB6ymx7SGAeYUqF8HAT', bitcoin.networks.testnet);
const publicKey = keys.publicKey;

console.log(keys.publicKey.toString("hex"));

var newtx = {
  inputs: [{addresses: ['ms9ySK54aEC2ykDviet9jo4GZE6GxEZMzf']}],
  outputs: [{addresses: ['msWccFYm5PPCn6TNPbNEnprA4hydPGadBN'], value: 1000}]
};
// calling the new endpoint, same as above
$.post('https://api.blockcypher.com/v1/btc/test3/txs/new', JSON.stringify(newtx))
  .then(function(tmptx) {
    // signing each of the hex-encoded string required to finalize the transaction
    tmptx.pubkeys = [];
    tmptx.signatures = tmptx.tosign.map(function(tosign, n) {
      tmptx.pubkeys.push(keys.publicKey.toString("hex"));
      return keys.sign(new buffer.Buffer(tosign, "hex")).toString("hex");
    });
    // sending back the transaction with all the signatures to broadcast
    $.post('https://api.blockcypher.com/v1/btc/test3/txs/send', tmptx).then(function(finaltx) {
      console.log(finaltx);
    }).catch(function (response) {
   console.log(response.responseText);
});
  }).catch(function (response) {
   console.log(response.responseText);
});

似乎return keys.sign(new buffer.Buffer(tosign, "hex")).toString("hex");这一行是问题所在，但我不确定哪里出了问题。

Answer 1

讨论了这个问题，并回答了here。This post和this one将特别受到关注。

据我所知，根据这个问题，respective one是在BlockCypher repo上打开的。尽管到目前为止它的状态仍然是opened，但是当前的BlockCypher JS docs respective API description包含该行的更改版本

return keys.sign(new buffer.Buffer(tosign, "hex")).toString("hex"); 

在toString()之前使用toDER()转换，因此它现在看起来像这样

return keys.sign(new buffer.Buffer(tosign, "hex")).toDER().toString("hex");