The eth_getTransactionByBlockNumberAndIndex method returns detailed information about a transaction by specifying its position (index) within a block identified by the block's number or tag. This method is particularly useful for retrieving transactions from known block heights or special blocks like "latest".

Use Cases

Real-time transaction monitoring
Block explorer functionality
Specific transaction analysis
Historical data extraction
Transaction verification
Sequential transaction processing
Smart contract interaction analysis
Mempool investigation (using "pending" tag)

Method Details

This method locates a transaction using both a block number (or tag) and the transaction's index within that block.

Parameters:

blockNumberstring[required]

Block number in hex format or tags: latest, earliest, pending, safe, finalized

indexstring[required]

The transaction's index position in the block (hexadecimal)

Returns:

resultobject

The transaction object, or null if not found

blockHashstring

Hash of the block containing this transaction

blockNumberstring

Block number containing this transaction (hex)

fromstring

Address of the sender

gasstring

Gas provided by the sender (hex)

gasPricestring

Gas price in wei (hex)

maxFeePerGasstring

Maximum fee per gas (EIP-1559 transactions)

maxPriorityFeePerGasstring

Maximum priority fee per gas (EIP-1559 transactions)

hashstring

Transaction hash

inputstring

Transaction data payload

noncestring

Number of transactions from sender prior to this one (hex)

tostring

Recipient address, null for contract creation transactions

transactionIndexstring

Integer of the transaction's position in the block (hex)

valuestring

Value transferred in wei (hex)

typestring

Transaction type (0=legacy, 1=EIP2930, 2=EIP1559)

accessListarray

List of addresses and storage keys (EIP-2930 and EIP-1559)

chainIdstring

Chain ID specified in the transaction

vstring

V parameter of the signature

rstring

R parameter of the signature

sstring

S parameter of the signature

Response Example

{
	"jsonrpc": "2.0",
	"id": 1,
	"result": {
		"blockHash": "0x0f2c90d18695045ede8b52476bba47db4c99ad8e9c748dd64147dcb698e88d5f",
		"blockNumber": "0x1194bb0",
		"from": "0xef3a770aec2e5e97994c8f0e283e7992e2c39a2a",
		"gas": "0x2b13c",
		"gasPrice": "0x342770c00",
		"maxFeePerGas": "0x342770c00",
		"maxPriorityFeePerGas": "0x3b9aca00",
		"hash": "0xa1c2c6b23cec00cdfa10a2bc30357c4250a2efb3cdf3c4d5c71e8b90ccb9071d",
		"input": "0x095ea7b30000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488dffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
		"nonce": "0x1a8",
		"to": "0x6982508145454ce325ddbe47a25d4ec3d2311933",
		"transactionIndex": "0x0",
		"value": "0x0",
		"type": "0x2",
		"accessList": [],
		"chainId": "0x1",
		"v": "0x1",
		"r": "0xea5232855738e1c0d1a6695f0a0c76de2db3c6c84eec9d7b7f4523d8dc0db1d5",
		"s": "0x2fd0b585c8e8df25e2e95ca8afe94b2d84a4c298d1e526f9afa0c2f1d492cd0d"
	}
}

Block Tag Meanings

latest: The most recently mined block
earliest: Genesis block (block 0)
pending: Currently pending block (transactions in mempool)
safe: Latest block considered safe by network
finalized: Latest block that has achieved finality