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debug_traceBlockByHash RPC Method

Returns the possible tracing result number by executing all transactions in the block specified by the block hash with a tracer.

Updated on
Feb 09, 2026
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Parameters

blockHash
string
REQUIRED

The hash of the block to be traced

object
object
REQUIRED

The tracer object with the following fields:

tracer
string

The type of tracer. It could be callTracer or prestateTracer

callTracer
string

The calltracer keeps track of all call frames, including depth 0 calls, that are made during a transaction

prestateTracer
string

The prestateTracer replays the transaction and tracks every part of state that occured during the transaction

tracerConfig
object

The object to specify the configurations of the tracer

onlyTopCall
boolean

When set to true, this will only trace the primary (top-level) call and not any sub-calls. It eliminates the additional processing for each call frame

Returns

type
array

The type of the call

from

The address the transaction is sent from

to

The address the transaction is directed to

value

The integer of the value sent with this transaction

gas

The integer of the gas provided for the transaction execution

gasUsed

The integer of the gas used

input

The data given at the time of input

output

The data which is returned as an output

calls

A list of sub-calls

Request
Response
1
{
2
"jsonrpc": "2.0",
3
"id": 1,
4
"result": [
5
{
6
"type": "CALL",
7
"from": "0x8894e0a0c962cb723c1976a4421c95949be2d4e3",
8
"to": "0x6b175474e89094c44da98b954eedeac495271d0f",
9
"value": "0x0",
10
"gas": "0x30d40",
11
"gasUsed": "0x7148",
12
"input": "0xa9059cbb0000000000000000000000002c46b28e4bac6b0188baf722f17f5f36e217033000000000000000000000000000000000000000000000000058d15e176280000",
13
"output": "0x0000000000000000000000000000000000000000000000000000000000000001",
14
"calls": [
15
{
16
"type": "STATICCALL",
17
"from": "0x6b175474e89094c44da98b954eedeac495271d0f",
18
"to": "0x8894e0a0c962cb723c1976a4421c95949be2d4e3",
19
"gas": "0x2e010",
20
"gasUsed": "0x1388",
21
"input": "0x70a08231000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
22
"output": "0x0000000000000000000000000000000000000000000b56ea85ae38dd000000",
23
"calls": []
24
}
25
]
26
},
27
{
28
"type": "CALL",
29
"from": "0x81b7e08f65bdf5648606c89998a9cc8164397647",
30
"to": "0x5c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f",
31
"value": "0x0",
32
"gas": "0x2a3a0",
33
"gasUsed": "0x123b4",
34
"input": "0xe8e33700000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
35
"output": "0x000000000000000000000000f7ae43fabe91b091e3bae07d91b5c8758e97c12b",
36
"calls": []
37
}
38
]
39
}
1
{
2
"jsonrpc": "2.0",
3
"id": 1,
4
"result": [
5
{
6
"type": "CALL",
7
"from": "0x8894e0a0c962cb723c1976a4421c95949be2d4e3",
8
"to": "0x6b175474e89094c44da98b954eedeac495271d0f",
9
"value": "0x0",
10
"gas": "0x30d40",
11
"gasUsed": "0x7148",
12
"input": "0xa9059cbb0000000000000000000000002c46b28e4bac6b0188baf722f17f5f36e217033000000000000000000000000000000000000000000000000058d15e176280000",
13
"output": "0x0000000000000000000000000000000000000000000000000000000000000001",
14
"calls": [
15
{
16
"type": "STATICCALL",
17
"from": "0x6b175474e89094c44da98b954eedeac495271d0f",
18
"to": "0x8894e0a0c962cb723c1976a4421c95949be2d4e3",
19
"gas": "0x2e010",
20
"gasUsed": "0x1388",
21
"input": "0x70a08231000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
22
"output": "0x0000000000000000000000000000000000000000000b56ea85ae38dd000000",
23
"calls": []
24
}
25
]
26
},
27
{
28
"type": "CALL",
29
"from": "0x81b7e08f65bdf5648606c89998a9cc8164397647",
30
"to": "0x5c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f",
31
"value": "0x0",
32
"gas": "0x2a3a0",
33
"gasUsed": "0x123b4",
34
"input": "0xe8e33700000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
35
"output": "0x000000000000000000000000f7ae43fabe91b091e3bae07d91b5c8758e97c12b",
36
"calls": []
37
}
38
]
39
}
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