Skip to main content
POST
debug_traceBlockByHash
curl --request POST \
  --url https://tempo-mainnet.core.chainstack.com/c3ce2925b51f1ed18719fe8a23bbdccf/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "debug_traceBlockByHash",
  "params": [
    "0x1c3830dd03a362ba82e82017a5f4e361c12fc43b64a1e4ebd2902f0c313cad7e",
    {
      "tracer": "callTracer"
    }
  ],
  "id": 1
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": [
    {}
  ]
}

Documentation Index

Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt

Use this file to discover all available pages before exploring further.

Tempo API method that returns detailed traces for all transactions in a block specified by block hash. This is useful for analyzing all contract interactions within a specific block.
Get your own node endpoint todayStart for free and get your app to production levels immediately. No credit card required.You can sign up with your GitHub, X, Google, or Microsoft account.

​
Parameters

  • blockHash — the hash of the block to trace
  • tracerConfig — (optional) tracer configuration object:
    • tracer — tracer type (e.g., callTracer, prestateTracer)
    • timeout — (optional) timeout for the trace
    • tracerConfig — (optional) tracer-specific configuration

​
Response

  • result — array of trace objects, one for each transaction in the block. The format depends on the tracer used.
For callTracer, each trace contains:
  • from — sender address
  • to — recipient address
  • gas — gas provided
  • gasUsed — gas consumed
  • input — call data
  • output — return data
  • calls — nested array of internal calls
  • type — call type (CALL, DELEGATECALL, etc.)

​
debug_traceBlockByHash code examples

const ethers = require('ethers');
const NODE_URL = "CHAINSTACK_NODE_URL";
const provider = new ethers.JsonRpcProvider(NODE_URL);

const traceBlockByHash = async (blockHash) => {
    const traces = await provider.send("debug_traceBlockByHash", [
      blockHash,
      { tracer: "callTracer" }
    ]);

    console.log(`Block contains ${traces.length} transaction traces`);
    for (let i = 0; i < traces.length; i++) {
      const trace = traces[i].result;
      console.log(`\nTx ${i}: ${trace.from} -> ${trace.to}`);
      console.log(`  Type: ${trace.type}, Gas Used: ${trace.gasUsed}`);
    }
  };

traceBlockByHash("0x1c3830dd03a362ba82e82017a5f4e361c12fc43b64a1e4ebd2902f0c313cad7e");

Body

application/json
​
jsonrpc
string
default:2.0
​
method
string
default:debug_traceBlockByHash
​
params
any[]

Block hash and optional tracer config

​
id
integer
default:1

Response

200 - application/json

Array of transaction traces

​
jsonrpc
string
​
id
integer
​
result
object[]

Array of trace objects for each transaction

Last modified on May 18, 2026