eth_getTransactionReceipt - Astar RPC Method

Returns the receipt of a transaction by transaction hash on Astar. Receipt is only available for mined transactions.

Why Astar? Build on Polkadot's leading dApp hub supporting EVM, WASM, and upcoming PolkaVM environments with EVM + WASM + PolkaVM support, Build2Earn developer rewards, dApp Staking, and Soneium cross-layer integration.

When to Use This Method

eth_getTransactionReceipt is essential for multi-chain dApp developers, DeFi builders, and teams leveraging Polkadot + Ethereum ecosystems:

• Transaction confirmation with success/failure status: Verify that a transaction has been mined on Astar and determine whether it succeeded or reverted
• Gas usage analysis: Compare actual gas consumed against pre-transaction estimates for cross-chain DeFi, multi-VM smart contracts, and XCM-enabled interoperability with Ethereum and Cosmos
• Event log parsing from emitted events: Extract and decode contract events for indexing, analytics, and notification systems
• Contract deployment detection: Identify newly deployed contracts on Polkadot's leading dApp hub supporting EVM, WASM, and upcoming PolkaVM environments by checking the contractAddress field

Common Use Cases

1. Confirm Transaction Success and Parse Emitted Events

Poll eth_getTransactionReceipt after submitting a transaction to confirm it was mined successfully on Astar. Once available, iterate through the logs array to decode and process events emitted by the transaction.

import { JsonRpcProvider } from 'ethers';

const provider = new JsonRpcProvider('https://api-astar.n.dwellir.com/YOUR_API_KEY');

async function confirmAndParse(txHash) {
  let receipt = null;

  while (!receipt) {
    receipt = await provider.getTransactionReceipt(txHash);
    if (!receipt) {
      console.log('Waiting for confirmation...');
      await new Promise(r => setTimeout(r, 2000));
    }
  }

  const status = receipt.status === 1 ? 'Success' : 'Failed';
  console.log(`Transaction ${status} in block #${receipt.blockNumber}`);
  console.log(`Gas used: ${receipt.gasUsed.toString()}`);
  console.log(`Events emitted: ${receipt.logs.length}`);

  for (const log of receipt.logs) {
    console.log(`  Event from ${log.address} with topics:`, log.topics);
  }

  return receipt;
}

confirmAndParse('0x43ac31f47abf56b34e0903e390dd9a1820ee7f03a6359cf2ef08d7152eb26cf3');

2. Detect Contract Deployments by Checking contractAddress

When monitoring the chain for new contract deployments on Astar, check the contractAddress field in transaction receipts. A non-null value indicates a contract creation transaction.

from web3 import Web3

w3 = Web3(Web3.HTTPProvider('https://api-astar.n.dwellir.com/YOUR_API_KEY'))

def detect_deployment(tx_hash):
    receipt = w3.eth.get_transaction_receipt(tx_hash)

    if not receipt:
        print(f'Transaction {tx_hash} not yet mined')
        return None

    if receipt['contractAddress']:
        print(f'Contract deployed at: {receipt["contractAddress"]}')
        print(f'Deployer: {receipt["from"]}')
        print(f'Gas used: {receipt["gasUsed"]}')
        return receipt['contractAddress']
    else:
        print(f'Transaction {tx_hash} is not a contract deployment')
        return None

detect_deployment('0x43ac31f47abf56b34e0903e390dd9a1820ee7f03a6359cf2ef08d7152eb26cf3')

3. Compute Effective Gas Price Paid by the Sender

Use the effectiveGasPrice field from the receipt (available on EIP-1559 chains) to calculate the actual cost of a transaction on Polkadot's leading dApp hub supporting EVM, WASM, and upcoming PolkaVM environments. Compare this against the gas price from the transaction object for fee analysis.

package main

import (
    "context"
    "fmt"
    "log"
    "math/big"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/ethclient"
)

func main() {
    client, _ := ethclient.Dial("https://api-astar.n.dwellir.com/YOUR_API_KEY")

    txHash := common.HexToHash("0x43ac31f47abf56b34e0903e390dd9a1820ee7f03a6359cf2ef08d7152eb26cf3")
    receipt, _ := client.TransactionReceipt(context.Background(), txHash)

    if receipt == nil {
        log.Fatal("Transaction not yet mined")
    }

    status := "Success"
    if receipt.Status == 0 {
        status = "Failed"
    }

    fmt.Printf("Status: %s\n", status)
    fmt.Printf("Block: %d\n", receipt.BlockNumber.Uint64())
    fmt.Printf("Gas used: %d\n", receipt.GasUsed)

    // Calculate total cost: gasUsed * effectiveGasPrice
    totalCost := new(big.Int).Mul(
        big.NewInt(int64(receipt.GasUsed)),
        receipt.EffectiveGasPrice,
    )
    fmt.Printf("Total cost: %s wei\n", totalCost.String())

    if receipt.ContractAddress != (common.Address{}) {
        fmt.Printf("Contract deployed at: %s\n", receipt.ContractAddress.Hex())
    }
}

Best Practices

• Receipt is only available after mining; poll until non-null: A null response means the transaction is pending or not found; implement a polling loop with exponential backoff to wait for confirmation
• Check the status field: 0x1 indicates a successful execution; 0x0 means the transaction reverted and may have consumed all provided gas
• Parse the logs array for events using known topic hashes: Each log entry contains up to 4 indexed topics and a data field; use ABI definitions to decode them into readable event parameters
• For frontrunning detection, compare effective gas price across similar transactions: Monitoring the effectiveGasPrice across transactions in a block can reveal priority gas auction dynamics on Polkadot's leading dApp hub supporting EVM, WASM, and upcoming PolkaVM environments
• contractAddress is non-null only for contract deployment transactions: Use this field to distinguish regular transfers from contract create operations

Code Examples

Error Handling

Note: Returns null if transaction is not yet mined.

Related Methods

• eth_getTransactionByHash - Get transaction details
• eth_getLogs - Query logs by filter