Transaction Data Signature Logic

To sign transaction data, it is convenient and easy to use Web3 libraries, which are implemented in most languages.

Basic logic of signature implementation without using web3 libraries in PHP language - https://developer.cargox.digital/examples/signing_with_php.html

Javascript web3 - https://medium.com/coinmonks/signing-and-making-transactions-on-ethereum-using-web3-js-1b5663207d63

GoLang - https://ethereum.stackexchange.com/questions/16472/signing-a-raw-transaction-in-go

Ruby web3 - https://github.com/se3000/ruby-eth

PHP web3 - https://github.com/web3p/web3.php