trace_ethereum_transaction.js

var fs = require('fs');
const createKeccakHash = require('keccak');
var jayson = require('jayson');
var transaction = "0x1066b9764832dc6dc710c3e131ee54c68c1b3f1e21de6b3dc8f97ee68ff3f190";
var client = jayson.client.http({
  host: "149.248.8.23",
  port: 8545,
});

function hash(value) {
  let hasher = createKeccakHash('keccak256');
  hasher.update(Buffer.from(value.join(""), "hex"));

  return hasher.digest("hex").slice(0, 5);
}

function processStructLogs(logs) {
  logs.map((log) => {
    console.log(`${log.pc} ${log.op.padStart(8)} ${log.gas.toString().padStart(8)}`)
    // console.log(hash(log.memory.join())

    // Here is where you can inspect storage, memory, stack and the program counter
    // If you want to quickly compare large chunks of data you can hash them
    // console.log(log.storage)
    // console.log(log.pc)
    if(log.pc == 1202) {
      console.log(log.memory.join(""));
    }
  })
}
// To pull directly from Geth
// https://github.com/ethereum/go-ethereum/wiki/Tracing:-Introduction
//
// client.request("debug_traceTransaction", [transaction], (err, logs) => {
//   if (err) {
//     console.log(err);
//   } else {
//   processStructLogs(logs);
//   }
// });

// To pull from file
fs.readFile('0x1066b9-trace.json', 'utf8', (err, logs) => {
  if (err) {
    console.log(err);
  } else {
    processStructLogs(JSON.parse(logs.replace(/(['"])?([a-z0-9A-Z_]+)(['"])?:/g, '"$2": ')).structLogs)
  };
})