next-auth-pubkey/utils/lnurl/verify.js

A light-weight Lightning and Nostr auth provider for your Next.js app that's entirely self-hosted and plugs seamlessly into the next-auth framework.

// @ts-nocheck
import { strict as assert } from "assert";
import secp256k1 from "secp256k1";
function isHex(value) {
    assert.strictEqual(typeof value, "string", 'Invalid argument ("value"): String expected.');
    return Buffer.from(value, "hex").toString("hex") === value.toLowerCase();
}
export default function verify(sig, k1, key) {
    assert.ok(sig, 'Missing required argument: "sig"');
    if (typeof sig === "string" && isHex(sig)) {
        sig = Buffer.from(sig, "hex");
    }
    assert.ok(Buffer.isBuffer(sig), 'Invalid argument ("sig"): Hex-encoded string or buffer expected.');
    assert.ok(k1, 'Missing required argument: "k1"');
    if (typeof k1 === "string" && isHex(k1)) {
        k1 = Buffer.from(k1, "hex");
    }
    assert.ok(Buffer.isBuffer(k1), 'Invalid argument ("k1"): Hex-encoded string or buffer expected.');
    assert.ok(key, 'Missing required argument: "key"');
    if (typeof key === "string" && isHex(key)) {
        key = Buffer.from(key, "hex");
    }
    assert.ok(Buffer.isBuffer(key), 'Invalid argument ("key"): Hex-encoded string or buffer expected.');
    const signature = secp256k1.signatureImport(sig);
    return secp256k1.ecdsaVerify(signature, k1, key);
}