message-signing

You can sign and verify Ethereum messages in C# using this Skill to create cryptographic signatures for UTF-8 strings or raw bytes and recover the signer's public address. It utilizes Nethereum libraries to ensure message authenticity and EIP-2 compliant verification.

Ethereum message signing enables passwordless login by having users cryptographically sign a challenge message with their wallet. The backend then verifies the signature and recovers the public address to authenticate the user without requiring a traditional password.

Yes, you can verify a signature signed by MetaMask using Nethereum. This Skill recovers the signer's address from external wallet signatures, allowing you to confirm the authenticity of messages signed by external Ethereum wallets.

Yes, this Skill supports raw byte signing and UTF-8 message signing with the personal_sign prefix. It uses Nethereum libraries to apply the correct Ethereum-specific formatting for both string and byte array inputs.

To recover a signer's address from an Ethereum signature, you need the original message and the signature itself. This Skill uses Nethereum's EC key management utilities to compute and return the public address that authored the signature.

Strict EIP-2 compliant signature verification imposes specific cryptographic constraints on the signature format. This Skill enforces these rules during verification, meaning signatures generated outside these EIP-2 specifications will fail the validation process.