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tracer.js
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{
depth: 0,
memory: [],
callStack: [],
step: function(log, db) {
let depth = log.getDepth();
var prev = { offset: 0, len: 0 };
if (depth == this.depth + 1) {
} else {
prev = this.callStack[depth];
}
let op = log.op.toString();
var offset = 0;
var len = 0;
if (op == "CALLDATACOPY") {
offset = log.stack.peek(0);
len = log.stack.peek(2);
} else if (op == "CODECOPY") {
offset = log.stack.peek(0);
len = log.stack.peek(2);
} else if (op == "EXTCODECOPY") {
offset = log.stack.peek(1);
len = log.stack.peek(3);
} else if (op == "RETURNDATACOPY") {
offset = log.stack.peek(0);
len = log.stack.peek(2);
} else if (op == "MSTORE") {
offset = log.stack.peek(0);
len = 32;
} else if (op == "MSTORE8") {
offset = log.stack.peek(0);
len = 1;
} else if (op == "CALL") {
offset = log.stack.peek(5);
len = log.stack.peek(6);
} else if (op == "CALLCODE") {
offset = log.stack.peek(5);
len = log.stack.peek(6);
} else if (op == "DELEGATECALL") {
offset = log.stack.peek(4);
len = log.stack.peek(5);
} else if (op == "STATICCALL") {
offset = log.stack.peek(4);
len = log.stack.peek(5);
}
offset = parseInt(offset);
var diff = [];
if (prev.len != 0) {
diff = [prev.offset, toHex(log.memory.slice(prev.offset, prev.offset + prev.len))];
}
this.memory.push({len: log.memory.length(), diff: diff});
this.callStack[depth] = { offset: offset, len: len };
this.depth = depth;
},
fault: function() {},
result: function() {
return this.memory;
}
}