Function sp_finality_grandpa::check_message_signature

pub fn check_message_signature<H, N>(
    message: &Message<H, N>, 
    id: &AuthorityId, 
    signature: &AuthoritySignature, 
    round: RoundNumber, 
    set_id: SetId
) -> bool where
    H: Encode,
    N: Encode, 

Check a message signature by encoding the message as a localized payload and verifying the provided signature using the expected authority id.