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POST
/
efb0a5eccd2caa5135eb54eba6f7f300
debug_getModifiedAccountsByNumber
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "debug_getModifiedAccountsByNumber",
  "id": "1",
  "params": [
    "0x6eee4bc",
    "0x6eee4bd"
  ]
}
'
{
  "jsonrpc": "<string>",
  "id": "<string>",
  "result": [
    "<string>"
  ]
}

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.

The debug_getModifiedAccountsByNumber RPC method retrieves a list of accounts that were modified between two specified block numbers. This method is invaluable for developers and analysts looking to track changes to the state of accounts across specific blocks for debugging or analytical purposes.
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​
Request

To use debug_getModifiedAccountsByNumber, you should send a POST request with a JSON RPC call in the body.

​
Parameters

  • Start Block (string): The block number (in hexadecimal) from which to start tracking changes.
  • End Block (string): The block number (in hexadecimal) up to which to track changes.

​
Response

The response will be an array of account addresses (as strings) that were modified between the two specified blocks.
  • result (array): The addresses of the accounts modified between the specified blocks.

​
Use case

The debug_getModifiedAccountsByNumber method is essential for:
  • Developers debugging contract interactions over specific blocks.
  • Analysts tracking state changes for forensic or audit purposes.
  • Tools and services monitoring the Optimism state for changes to specific accounts.

Body

application/json
​
jsonrpc
string
default:2.0
required
​
method
string
default:debug_getModifiedAccountsByNumber
required
​
id
string
default:1
required
​
params
string[]
required

Response

200 - application/json

A list of accounts modified between the two block numbers

​
jsonrpc
string
​
id
string
​
result
string[]

The addresses of the modified accounts.

Last modified on May 18, 2026