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debug_traceTransaction

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`debug_traceTransaction` re-executes a transaction that has already been included in a block and records every step of its EVM execution. It is the canonical way to understand *why* a transaction behaved the way it did — which opcodes ran, how gas was consumed, what state was touched, where it reverted, and the revert reason.

By default the method returns a **struct (opcode) log**: a step-by-step list of every executed opcode with its program counter, gas, stack, memory, and storage deltas. Because these logs can be very large for complex transactions, you will usually pass a `tracer` in the options object instead — for example `callTracer` to get a compact tree of internal calls, or `prestateTracer` to get the accounts and storage the transaction read. See [Tracer options](#tracer-options) below.

This is a `debug`-namespace method available on the **Pro** tier and above. It is rate limited per tier (5 RPS on Pro, 15 RPS on Business) with a short burst allowance; there is no daily quota. Tracing is computationally heavy — keep the opcode-level default reserved for the transactions you genuinely need to inspect, and prefer a focused `tracer` where possible.

Parameters

This method takes no parameters.

Returns

debug_traceTransaction return value
FieldType
resultobject

Examples

curl https://<your-endpoint>/ \
  -X POST -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"debug_traceTransaction","params":[]}'
const res = await fetch("https://<your-endpoint>/", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "id": 1,
  "method": "debug_traceTransaction",
  "params": [],
  "jsonrpc": "2.0"
}),
});
const data = await res.json();
import requests
resp = requests.post("https://<your-endpoint>/", json={"id":1,"method":"debug_traceTransaction","params":[],"jsonrpc":"2.0"})
print(resp.json())

Usage

  1. Transport: HTTP (JSON-RPC).
  2. Networks: mainnet.
  3. Credit cost: 5 per call.

FAQ

What does debug_traceTransaction do?
Replays a single already-mined transaction and returns its full EVM execution trace.
How many credits does debug_traceTransaction cost?
debug_traceTransaction costs 5 credit(s) per call on Triport by default.
Is debug_traceTransaction available over WebSocket?
debug_traceTransaction is an HTTP JSON-RPC method.