const assert = require('assert');
const BigInteger = require('bigi');
var {Point} = require('ecurve')
const {keccak256} = require("@ethersproject/keccak256");

const {newBigFromString, ecparams, newKeyPair, newRequestParameters, blind, blindSign, unblind, verify} = require("../src/index.js");

describe("keccak256", function () {
    it("keccak256", async () => {
	const m = BigInteger.fromBuffer(Buffer.from("test", 'utf8'));
	const mHex = m.toString(16);
	const hHex = keccak256('0x' + mHex);
	assert.equal('0x9c22ff5f21f0b81b113e63f7db6da94fedef11b2119b4088b89664fb9a3cb658', hHex);
	const h = BigInteger.fromHex(hHex.slice(2));
	assert.equal('70622639689279718371527342103894932928233838121221666359043189029713682937432', h.toString());
    });
});

describe("test blind", function () {
    it("blind", async () => {
	    const {sk, pk} = newKeyPair();

	    const {k, signerR} = newRequestParameters();

	    const msg = BigInteger.fromBuffer(
		    Buffer.from("test", 'utf8')
	    );
	    assert.equal('1952805748', msg.toString());

	    const {mBlinded, userSecretData} = blind(msg, signerR);

	    const sBlind = blindSign(sk, mBlinded, k);

	    const sig = unblind(sBlind, userSecretData);

	    const verified = verify(msg, sig, pk);
	    assert.equal(true, verified);
    });
});