Function std::ecr::ed_verify

pub fn ed_verify(
    public_key: b256,
    signature: B512,
    msg_hash: b256,
) -> Result<bool, EcRecoverError>

Expand description

Verifies that a public key derived from the private key was used to sign a message.
Returns a Result to let the caller choose an error handling strategy.

Additional Information

Follows the edDSA curve25519 verification.

Arguments

public_key: [b256] - The public key that signed the message.
signature: [B512] - The signature generated by signing a message hash.
msg_hash: [b256] - The hashed signed data.

Returns

[Result<bool, EcRecoverError>] - A verified result or an error.

Examples

use std::{ecr::ed_verify, b512::B512, constants::ZERO_B256};

fn foo() {
    let pub_key = 0x314fa58689bbe1da2430517de2d772b384a1c1d2e9cb87e73c6afcf246045b10;
    let msg = ZERO_B256;
    let msg_hash = sha256(msg);
    let hi = 0xf38cef9361894be6c6e0eddec28a663d099d7ddff17c8077a1447d7ecb4e6545;
    let lo = 0xf5084560039486d3462dd65a40c80a74709b2f06d450ffc5dc00345c6b2cdd00;
    let signature: B512 = B512::from((hi, lo));
    // A verified public key with signature
    let verified = ed_verify(pub_key, signature, msg_hash).unwrap();
    assert(verified);
}