tx-oracle.js

const chains = {
    '1': 'https://eth-mainnet.g.alchemyapi.io/v2/',
    '42161': 'https://arb-mainnet.g.alchemyapi.io/v2/'
}


if (
    secrets.alchemy == ""
) {
    throw Error(
        "Provide Alchemy API key"
    )
}

const txHash = args[0];
if (txHash.length != 66 && !txHash.startsWith('0x')) throw Error("invalid transaction hash")
const chainId = args[1];
if (!chainId) throw Error("chainId is required");


const endpoint = `${chains[chainId]}${secrets.alchemy}`

const body = {
    jsonrpc: '2.0',
    id: 1,
    method: 'eth_getTransactionByHash',
    params: [txHash]
};

console.log(`Getting transaction\n \
        Tx hash: ${txHash} \n \
        Chain: ${chainId}`)

const res = await Functions.makeHttpRequest({
    url: endpoint,
    method: 'POST',
    data: body
})

if (res.error) {
    console.error(res.error);
    throw res.error;
}

const data = res.data.result;

if (!data.blockNumber) throw Error("Transaction not mined");

const response = {
    from: data.from,
    to: data.to,
    data: data.input
}

console.log(`Retrieved data for transaction ${txHash} on chain ${chainId} \n \
        From: ${response.from} \n \
        To: ${response.to} \n \
        Data: ${response.data}
    `)

return Functions.encodeString(JSON.stringify(response));