example.txt

{u'calls': [{u'args': u'NfqkFg==',
             u'calls': [{u'args': u'cKCCMQAAAAAAAAAAAAAAADridZOuPYpXXA1srVOnNvNhUseS',
                         u'calls': [],
                         u'error': None,
                         u'firststep': 232,
                         u'gas': 176091,
                         u'laststep': 399,
                         u'op': u'CALL',
                         u'return': u'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFGIMV93a4AAA=',
                         u'to': u'0xbb9bc244d798123fde783fcc1c72d3bb8c189413',
                         u'value': u'0'},
                        {u'args': u'qQWcuwAAAAAAAAAAAAAAAIs7O2JMPAOX09qP2GFRI5PVHcusAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFGIMV93a4AAA=',
                         u'calls': [],
                         u'error': None,
                         u'firststep': 478,
                         u'gas': 174892,
                         u'laststep': 1002,
                         u'op': u'CALL',
                         u'return': u'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAE=',
                         u'to': u'0xbb9bc244d798123fde783fcc1c72d3bb8c189413',
                         u'value': u'0'}],
             u'error': None,
             u'firststep': 125,
             u'gas': 201694,
             u'laststep': 1047,
             u'op': u'CALL',
             u'return': u'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAUYgxX3drgAAA==',
             u'to': u'0x3ae27593ae3d8a575c0d6cad53a736f36152c792',
             u'value': u'0'}],
 u'firststep': 0,
 u'laststep': 1097,
 u'return': u'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAE='}

tracer.js

{
  "idx": 0,
  "stack": [{"calls": [], "firststep": 0, "laststep": 0}],
  "result": function() { return this.stack[0]; },
  "step": function(log, db) {
    var frame = this.stack[this.stack.length - 1];
    if(log.err) {
      frame["error"] = log.err;
    } else if(log.depth == this.stack.length) {
      switch(log.op.toString()) {
      case "CALL":
      case "CALLCODE":
        var instart = log.stack.peek(3).Int64();
        var insize = log.stack.peek(4).Int64();
        this.stack.push({
          "firststep": this.idx + 1,
          "op": log.op.toString(),
          "gas": log.stack.peek(0).Int64(),
          "to": "0x" + log.stack.peek(1).Text(16),
          "value": log.stack.peek(2).String(),
          "args": log.memory.slice(instart, instart + insize),
          "error": null,
          "return": null,
          "calls": []
        });
        frame["calls"].push(this.stack[this.stack.length - 1]);
        break;
      case "DELEGATECALL":
        var instart = log.stack.peek(2).Int64();
        var insize = log.stack.peek(3).Int64();
        this.stack.push({
          "firststep": this.idx + 1,
          "op": log.op.toString(),
          "gas": log.stack.peek(0).Int64(),
          "to": "0x" + log.stack.peek(1).Text(16),
          "args": log.memory.slice(instart, instart + insize),
          "error": null,
          "return": null,
          "calls": []
        });
        frame["calls"].push(this.stack[this.stack.length - 1]);
        break;
      case "RETURN":
        var out = log.stack.peek(0).Int64();
        var outsize = log.stack.peek(1).Int64();
        frame.return = log.memory.slice(out, out + outsize);
        break;
      case "STOP":
      case "SUICIDE":
        frame.return = log.memory.slice(0, 0);
        break;
      }
    } else {
      this.stack = this.stack.slice(0, log.depth);
    }
    this.stack[this.stack.length - 1].laststep = ++this.idx;
  }
}