1st Node
Sign inGet API key

debug_traceTransaction

BaseC3

Replays a transaction and returns a detailed trace using a chosen tracer (callTracer, prestateTracer, or struct/opcode logs). The deepest introspection available; runs on our archive nodes.

Endpoint
POST https://api.1st-node.com/v1/base/rpc

Parameters

NameTypeDescription
hashDATA, 32 bytesTransaction hash to trace.
optionsObjectTracer config, e.g. { "tracer": "callTracer" }.

Returns

Object — the tracer output (call tree, prestate, or struct logs).

Request

curl https://api.1st-node.com/v1/base/rpc \
  -H "Authorization: Bearer $ONE_KEY" \
  -H "content-type: application/json" \
  -d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "debug_traceTransaction",
  "params": ["0x88df…", { "tracer": "callTracer" }]
}'
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "debug_traceTransaction",
  "params": ["0x88df…", { "tracer": "callTracer" }]
}

Response

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": { "type": "CALL", "from": "0x…", "to": "0x…", "gasUsed": "0x…", "calls": [] }
}
More trace methods on Base
trace_transactiontrace_block

← Base API

Frequently asked

Which tracers are supported?

callTracer, prestateTracer and struct/opcode logging are available on archive nodes.

Top up, get a key, ship.

Self-serve. Pay in crypto or card. Metered by credits — heavy primitives cost more, simple ones are cheap.

Get API key