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Signer

chains_sdk::traits

Trait Signer 

Source 
pub trait Signer {
    type Signature;
    type Error;

    // Required methods
    fn sign(&self, message: &[u8]) -> Result<Self::Signature, Self::Error>;
    fn sign_prehashed(
        &self,
        digest: &[u8],
    ) -> Result<Self::Signature, Self::Error>;
    fn public_key_bytes(&self) -> Vec<u8> ⓘ;
    fn public_key_bytes_uncompressed(&self) -> Vec<u8> ⓘ;
}
Expand description

A type that can produce cryptographic signatures.

Required Associated Types§

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type Signature

The signature type produced by this signer.

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type Error

The error type returned on failure.

Required Methods§

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fn sign(&self, message: &[u8]) -> Result<Self::Signature, Self::Error>

Sign a raw message. The implementation applies chain-specific hashing internally (e.g., Keccak-256 for Ethereum, double-SHA-256 for Bitcoin).

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fn sign_prehashed(&self, digest: &[u8]) -> Result<Self::Signature, Self::Error>

Sign a pre-hashed digest directly. The caller is responsible for applying the correct hash function. Returns InvalidHashLength if the digest length doesn’t match the expected hash output size.

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fn public_key_bytes(&self) -> Vec<u8> ⓘ

Return the public key as bytes (compressed format where applicable).

  • ECDSA (secp256k1, P-256): 33 bytes (SEC1 compressed)
  • Ed25519: 32 bytes
  • BIP-340 Schnorr: 32 bytes (x-only)
  • BLS12-381: 48 bytes (compressed G1)
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fn public_key_bytes_uncompressed(&self) -> Vec<u8> ⓘ

Return the public key in uncompressed format.

  • ECDSA (secp256k1, P-256): 65 bytes (04 || x || y)
  • Ed25519 / Schnorr / BLS: same as public_key_bytes() (no uncompressed form)

Implementors§