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POST
/
efb0a5eccd2caa5135eb54eba6f7f300
eth_getTransactionByBlockNumberAndIndex
curl --request POST \
  --url https://optimism-mainnet.core.chainstack.com/efb0a5eccd2caa5135eb54eba6f7f300 \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_getTransactionByBlockNumberAndIndex",
  "id": 1,
  "params": [
    "0x6ecf0b4",
    "0x1"
  ]
}
'
{
  "jsonrpc": "<string>",
  "id": 123,
  "result": {
    "blockHash": "<string>",
    "blockNumber": "<string>",
    "from": "<string>",
    "gas": "<string>",
    "gasPrice": "<string>",
    "hash": "<string>",
    "input": "<string>",
    "nonce": "<string>",
    "to": "<string>",
    "transactionIndex": "<string>",
    "value": "<string>",
    "v": "<string>",
    "r": "<string>",
    "s": "<string>"
  }
}
Optimism API method eth_getTransactionByBlockNumberAndIndex retrieves information about a transaction by specifying the block number and the transaction’s index position within the block. This method is useful for fetching specific transactions when the block number and index are known.
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​
Parameters

  • blockNumber — the number of the block.
  • transactionIndex — the index position of the transaction in the block, specified as a hexadecimal. The example uses "0x1".

​
Response

  • result — an object containing details about the transaction, including the block hash, block number, from address, gas used, gas price, hash, input data, nonce, to address, transaction index, value transferred, and the signature components (v, r, s).

​
Use case

The eth_getTransactionByBlockNumberAndIndex method is essential for:
  • Applications that need to retrieve specific transactions from a known block for analysis or display.
  • Services that monitor blocks and transactions for security, compliance, or other operational reasons.
  • Tools that reconstruct transaction sequences within blocks for auditing or forensic purposes.

Body

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

Response

200 - application/json

Transaction information for the given block number and index

​
jsonrpc
string
​
id
integer
​
result
object
Last modified on August 7, 2025