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

Additional Information

Follows the Secp256k1 elliptical curve.

Arguments

• signature: [B512] - The signature generated by signing a message hash.
• msg_hash: [b256] - The signed data.

Returns

• [Result<B512, EcRecoverError>] - The recovered public key or an error.

Examples

use std::{ecr::ec_recover, b512::B512};

fn foo() {
    let hi = 0xbd0c9b8792876713afa8bff383eebf31c43437823ed761cc3600d0016de5110c;
    let lo = 0x44ac566bd156b4fc71a4a4cb2655d3dd360c695edb17dc3b64d611e122fea23d;
    let msg_hash = 0xee45573606c96c98ba970ff7cf9511f1b8b25e6bcd52ced30b89df1e4a9c4323;
    let pub_hi = 0xD73A188181464CC84AE267E45041AEF6AB938F278E636AA1D02D3014C1BEF74E;
    let pub_lo = 0xC44415635160ACFC87A84300EED97928C949A2D958FC0947C535F7539C59AE75;
    let signature: B512 = B512::from((hi, lo));
    // A recovered public key pair.
    let public_key = ec_recover(signature, msg_hash).unwrap();

    assert(public_key.bits()[0] == pub_hi);
    assert(public_key.bits()[1] == pub_lo);
}