Ethereum Cookbook

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Starting from web3.js v1.x.x, there is an option to extract/recover the address from the signed transaction data. This allows us to verify the origin of the transaction:

web3.eth.accounts.recoverTransaction(rawTransaction)

This method accepts the raw transaction as an input and returns the address used to sign the transaction:

var result = web3.eth.accounts.recoverTransaction("0x0...");
console.log(result);

You can also recover the address from signed data using the accounts.recover() method:

web3.eth.accounts.recover(signatureObject);
web3.eth.accounts.recover(message, signature [, preFixed]);
web3.eth.accounts.recover(message, v, r, s [, preFixed]);

This method can accept various types of input to recover the data:

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