TypeError: web3.eth.sendTransaction(...).then is not a function

Question

I was trying to transfer some ether using ganache desktop application in nodejs. It was properly working but suddenly an error occurred.

var s = 1;

try{
 web3.eth.sendTransaction({
 from: '0x627306090abaB3A6e1400e9345bC60c78a8BEf57',
 to:'0x821aea9a577a9b44299b9c15c88cf3087f3b5544',
 value: web3.toWei(s.toString(), "ether")

}).then(function(receipt) {
    console.log(receipt);
    res.json({success: true});

}).catch(function(e){
console.log('error occured');
console.log(e);
res.json({success: false });
});

If .then() and .catch() is removed, ether is transferred.

Answer 1

You need to use a callback. Kindly read the documentation.

var handleReceipt = (error, receipt) => {
  if (error) console.error(error);
  else {
    console.log(receipt);
    res.json(receipt);
  }
}

web3.eth.sendTransaction({
 from: '0x627306090abaB3A6e1400e9345bC60c78a8BEf57',
 to:'0x821aea9a577a9b44299b9c15c88cf3087f3b5544',
 value: web3.toWei(s.toString(), "ether")
}, handleReceipt);

Answer 2

This is straight from the documentation:

web3.eth.sendTransaction({from: '0x123...', data: '0x432...'})
.once('sending', function(payload){ ... })
.once('sent', function(payload){ ... })
.once('transactionHash', function(hash){ ... })
.once('receipt', function(receipt){ ... })
.on('confirmation', function(confNumber, receipt, latestBlockHash){ ... })
.on('error', function(error){ ... })
.then(function(receipt){
    // will be fired once the receipt is mined
}); and it does not recognize .once, .on, or.then
or.catch