eth_getTransactionByHash

eth_getTransactionByHash fetches the full transaction object for a given hash on Arbitrum One, the Optimistic Rollup (chain ID 42161) where gas is paid in ETH and the sequencer issues sub-second soft confirmations before settling to Ethereum L1. Pass a 32-byte transaction hash to https://arbitrum.therpc.io/YOUR_API_KEY and it returns the transaction object for that hash — sender, recipient, value in ETH wei, input data, gas fields, and its block placement — or null if no such transaction is known.

Use cases

• Confirm a submitted Arbitrum One transaction left the sequencer's mempool and landed in a block by checking that blockNumber is non-null.
• Decode the input field to identify which contract function was called — for example a swap on Uniswap or a deposit on Aave.
• Read the from address and value (ETH wei) to verify an incoming payment.

Parameters

Response

Example request

1curl https://arbitrum.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H "Content-Type: application/json" \
4  -d '{
5    "jsonrpc": "2.0",
6    "method": "eth_getTransactionByHash",
7    "params": ["0x0000000000000000000000000000000000000000000000000000000000000000"],
8    "id": 1
9  }'

Try it live in the Arbitrum One playground.

Errors & troubleshooting

Common pitfalls

• A non-null object only means the transaction exists, not that it succeeded — call eth_getTransactionReceipt and read the status field for the execution outcome.
• A transaction the sequencer has accepted but not yet included returns an object whose blockHash, blockNumber, and transactionIndex are all null.
• Dropped or never-broadcast transactions return null outright, so null-check the response before touching any field.

Supported networks

• Mainnet — Chain ID: 42161
• Sepolia — Chain ID: 421614

See also

• eth_getTransactionReceipt
• eth_getTransactionByBlockHashAndIndex
• eth_getTransactionByBlockNumberAndIndex

1curl https://arbitrum.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H 'Content-Type: application/json' \
4  -d '{"jsonrpc":"2.0","id":1,"method":"eth_getTransactionByHash","params":[""]}'