Tracers

Trace a transaction clause

This endpoint allows you to create a tracer for a specific clause. Tracers are instrumental in monitoring and analyzing the execution flow within the EVM. You can customize the tracer using various options to tailor it to your specific debugging needs.

POSThttps://vet.nownodes.io/debug/tracers

Body

namenullable enum

The name of the tracer. An empty name stands for the default struct logger tracer.

Example: "prestate"

4bytecallnoopprestateunigrambigramtrigramevmdisopcount

confignullable object

The configuration of the tracer. It is specific to the name

targetstring

The unified path of the target to be traced. Currently, only the clause is supported.

Format: blockID/(txIndex|txId)/clauseIndex

Example: "0x010709463c1f0c9aa66a31182fb36d1977d99bfb6526bae0564a0eac4006c31a/0/0"

Pattern: ^0x[0-9a-fA-F]{64}\/(0x[0-9a-fA-F]{64}|\d+)\/[0-9]+$

Response

Body

object

The response will depend on the type of tracer you have created.

Request

const response = await fetch('https://vet.nownodes.io/debug/tracers', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "target": "0x010709463c1f0c9aa66a31182fb36d1977d99bfb6526bae0564a0eac4006c31a/0/0",
      "name": "prestate",
      "config": {}
    }),
});
const data = await response.json();

Response

Invalid target