counterparty_partial_signature: PartialSignatureWithNonce,
secp_ctx: &Secp256k1<secp256k1::All>
) -> Result<PartialSignature, ()>;
counterparty_partial_signature: PartialSignatureWithNonce,
secp_ctx: &Secp256k1<secp256k1::All>
) -> Result<PartialSignature, ()>;