Function secp256k1_zkp_sys::secp256k1_schnorrsig_sign

pub unsafe extern "C" fn secp256k1_schnorrsig_sign(
    cx: *const Context,
    sig: *mut u8,
    msg32: *const u8,
    keypair: *const Keypair,
    aux_rand32: *const u8
) -> i32