@gandlaf21/cashu-crypto
Version:
Basic cashu crypto functions
45 lines (37 loc) • 1.13 kB
text/typescript
import { schnorr } from '@noble/curves/secp256k1';
import { sha256 } from '@noble/hashes/sha256';
import { parseSecret } from '../common/NUT11.js';
import { Proof } from '../common/index.js';
export const verifyP2PKSig = (proof: Proof) => {
if (!proof.witness) {
throw new Error('could not verify signature, no witness provided');
}
const parsedSecret = parseSecret(proof.secret);
// const tags = {} as Tags
// parsedSecret[1].tags.forEach((e: string[]) => {tags[e[0]]=e.shift()})
// if (tags.locktime) {
// const locktime = parseInt(tags.locktime[1])
// let isUnlocked = false
// if (Math.floor(Date.now() / 1000)>=locktime) {
// isUnlocked = true
// }
// }
// if (tags.sigflag as SigFlag) {
// if (tags.sigflag[0]==='SIG_INPUT') {
// }
// else if(tags.sigflag[0]==='SIG_ALL') {
// }
// else {
// throw new Error("Unknown sigflag");
// }
// }
// if (tags.n_sigs) {
// if (tags.pubkeys) {
// }
// }
return schnorr.verify(
proof.witness.signatures[0],
sha256(new TextDecoder().decode(proof.secret)),
parsedSecret[1].data
);
};