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debug_traceBlock RPC Method

Returns a full stack trace of all invoked opcodes of all transactions that were included in a block.

Updated on
Apr 07, 2026
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Parameters

block
string
REQUIRED

The RLP encoded block

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

result

A result array with the following fields:

type
string

The type of the call

from
string

The address the transaction is sent from

to
string

The address the transaction is directed to

value
string

The integer of the value sent with this transaction

gas
string

The integer of the gas provided for the transaction execution

gasUsed
string

The integer of the gas used

input
string

The data given at the time of input

output
string

(Optional) The data which is returned as an output

calls
array

A list of sub-calls

Request
Response
1
{
2
"jsonrpc": "2.0",
3
"id": 1,
4
"result": [
5
{
6
"result": {
7
"gas": 253014,
8
"failed": false,
9
"returnValue": "0x",
10
"structLogs": [
11
{
12
"pc": 0,
13
"op": "PUSH1",
14
"gas": 338481,
15
"gasCost": 3,
16
"depth": 1,
17
"stack": []
18
}
19
]
20
},
21
"txHash": "0x063049bb338b74a5e46eea394fdee8e6cdc4570dcf9cc94ea2795e8a8ed9c27e"
22
}
23
]
24
}
1
{
2
"jsonrpc": "2.0",
3
"id": 1,
4
"result": [
5
{
6
"result": {
7
"gas": 253014,
8
"failed": false,
9
"returnValue": "0x",
10
"structLogs": [
11
{
12
"pc": 0,
13
"op": "PUSH1",
14
"gas": 338481,
15
"gasCost": 3,
16
"depth": 1,
17
"stack": []
18
}
19
]
20
},
21
"txHash": "0x063049bb338b74a5e46eea394fdee8e6cdc4570dcf9cc94ea2795e8a8ed9c27e"
22
}
23
]
24
}
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