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The recoverPublicKey function is used to recover the original signing 64-byte public key from a hash and signature. It is based on the Ethereum cryptography library, which uses elliptic curve secp256k1 for ECDSA signatures. The function takes two parameters: hash, a string representing the hash that was signed, and signature, a hexadecimal string or byte array representing the signature of the hash.
Here's an example of how to use the recoverPublicKey function:
In this example, the hash is a hexadecimal string representing the hash of the message that was signed, and the signature is a hexadecimal string representing the ECDSA signature of the hash. The function returns the signing public key, which can be used to determine the origin of the signed message.
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