0

I have the following code which returns the tx hash but when I call upon the receipt it returns null and thus cannot extract the address:

const privateKey1Buffer = Buffer.from(privateKey1, 'hex')    
var _addressProvider = '0x506B0B2CF20FAA8f38a4E2B524EE43e1f4458Cc5';
var flashloanv1Contract = new web3.eth.Contract([{"inputs":[{"internalType":"address","name":"_addressProvider","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_assetAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"LogWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"addressesProvider","outputs":[{"internalType":"contract ILendingPoolAddressesProviderV1","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_reserve","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint256","name":"_fee","type":"uint256"},{"internalType":"bytes","name":"_params","type":"bytes"}],"name":"executeOperation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"}],"name":"flashloan","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_assetAddress","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]);

var flashloanv1 = flashloanv1Contract.deploy({
  data: '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
  arguments: [
       _addressProvider,
  ]
});

const txObject = {from: account['address'], 
        nonce: 23,
          gasLimit: web3.utils.toHex(500),  
          gas: web3.utils.toHex(4700000)
          };
const tx = new Tx(txObject, { 'chain': 'kovan' });    
tx.sign(privateKey1Buffer);
const serializedTx = tx.serialize();
const raw = '0x' + serializedTx.toString('hex');

async function testBasicExample(){
  const transaction = await web3.eth.sendSignedTransaction(raw, (err, tx) =>{
    console.log(err, tx);
    var receipt = web3.eth.getTransactionReceipt(tx)
    .then(console.log);
})
}

testBasicExample();

The example is from https://www.quicknode.com/guides/defi/how-to-make-a-flash-loan-using-aave.

Update1:

This is the webdeploy code from Remix: enter image description here

5
  • Is the nonce correct? You could get the correct nonce by calling web3.eth.getTransactionCount.
    – Ismael
    Commented Oct 10, 2021 at 3:47
  • The nonce is correct. Can you try and deploy it?
    – simsalabim
    Commented Oct 10, 2021 at 11:14
  • Is the transaction mined? From the @ethereumjs/tx examples it seems gasLimit should be used instead of gas.
    – Ismael
    Commented Oct 10, 2021 at 15:44
  • @Ismael Using gasLimit: web3.utils.toHex(4700000) and txCount2 = web3.eth.getTransactionCount(MY_ADDRESS) to provide the nonce leads to a tx hash and the error Transaction was not mined within 750 seconds, please make sure your transaction was properly sent.
    – simsalabim
    Commented Oct 11, 2021 at 13:13
  • That means for some reason the transaction hasn't been mined, perahps the gas is too low, a pending transaction, not enough ether to pay transaction fee. See this ethereum.stackexchange.com/questions/80145/….
    – Ismael
    Commented Oct 11, 2021 at 15:50

0

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