# Functions
https://ethereum.stackexchange.com/questions/76810/sign-message-with-web3-and-verify-with-openzeppelin-solidity-ecdsa-sol.
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https://gist.github.com/dcb9/385631846097e1f59e3cba3b1d42f3ed#file-eth_sign_verify-go https://developer.cargox.digital/examples/signing_with_go.html.