Future Belongs To Secure And Digital Money Transfer Services

Globalization is a key driving factor for money transfer companies nowadays. Remittances are helping to minimize the economic gap between developed and developing world, that needs to be paced with the inclusion of strong financial reforms in the developing countries to boost up growth back home. https://blog.acemoneytransfer.com/wp-content/uploads/2019/12/4.jpg Apart from that there is a need to…

Transaction Timing Implications for Reentry Attacks

This is the classic reentry attack: function withdrawBalance() public { uint amountToWithdraw = userBalances[msg.sender]; (bool success, ) = msg.sender.call.value(amountToWithdraw)(“”); require(success); userBalances[msg.sender] = 0; } I don’t understand how this works. It seems one transaction is not completed before the other. I know that in the Dao attack a contract using a fallback function on call.value()…

Cannot read property ‘then’ of undefined

I want to send eth from one address to another. After executing the code, Cannot read property ‘then’ of undefined error appears, how to fix? Thanks in advance const Web3 = require(‘web3’) const Tx = require(‘ethereumjs-tx’).Transaction const web3 = new Web3(new Web3.providers.HttpProvider(‘https://mainnet.infura.io/‘)) const addressFrom = ‘addr1’ const privateKey = Buffer.from(‘key’, ‘hex’) const addressTo = ‘addr2’…