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Monad API method that returns information about a transaction by block number and transaction index position. This method allows you to retrieve a specific transaction using the block number and the transaction’s position within that block.
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Parameters

  • quantity|tag — the block number as a hexadecimal string, or one of the following block tags:
    • latest — the most recent block in the canonical chain
    • earliest — the genesis block
    • pending — the pending state/transactions
  • quantity — the transaction index position within the block, encoded as hexadecimal.

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Response

  • result — the transaction object, or null when no transaction was found:
    • blockHash — hash of the block containing this transaction
    • blockNumber — number of the block containing this transaction
    • from — address of the sender
    • gas — gas provided by the sender
    • gasPrice — gas price in wei
    • hash — hash of the transaction
    • input — the data sent along with the transaction
    • nonce — number of transactions made by the sender
    • to — address of the receiver
    • transactionIndex — integer of the transaction’s index position
    • value — value transferred in wei
    • v, r, s — signature values

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eth_getTransactionByBlockNumberAndIndex code examples

const { ethers } = require("ethers");

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

async function getTransactionByIndex() {
  const blockNumber = "latest"; // Or use hex like "0x1234"
  const index = "0x0"; // First transaction
  const tx = await provider.send("eth_getTransactionByBlockNumberAndIndex", [blockNumber, index]);
  console.log(tx);
}

getTransactionByIndex();

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Use case

A practical use case for eth_getTransactionByBlockNumberAndIndex is building block explorers that allow users to browse transactions sequentially within blocks, or analyzing the first or last transactions in recent blocks.