import verifyDataSignature from "@cardano-foundation/cardano-verify-datasignature";
import { ProofStatus, SignatureProof } from "@notabene/javascript-sdk";

export async function verifyCIP8Signature(
  proof: SignatureProof
): Promise<SignatureProof> {
  const [ns, , address] = proof.address.split(/:/);
  const key =
    proof.chainSpecificData && "cardanoCoseKey" in proof.chainSpecificData
      ? proof.chainSpecificData.cardanoCoseKey
      : null;

  if (ns !== "cardano" || !key) {
    return { ...proof, status: ProofStatus.FAILED };
  }

  try {
    const verified = verifyDataSignature(
      proof.proof,
      key,
      proof.attestation,
      address
    );
    return {
      ...proof,
      status: verified ? ProofStatus.VERIFIED : ProofStatus.FAILED,
    };
  } catch {
    return { ...proof, status: ProofStatus.FAILED };
  }
}