1import * as assert from 'assert'
 2
 3import {
 4	stringToBigNumber,
 5	messageToBigNumber,
 6	decodePoint,
 7	ecParams,
 8	newKeyPair,
 9	newRequestParameters,
10	blind,
11	blindSign,
12	unblind,
13	verify,
14	hashBigNumber,
15	Point,
16	BigNumber
17} from "../src/index"
18
19describe("keccak256", function () {
20	it("should hash strings and big numbers", async () => {
21		const m = messageToBigNumber("test")
22		assert.strictEqual('1952805748', m.toString())
23
24		const hHex = hashBigNumber(m)
25		assert.strictEqual(hHex, '9c22ff5f21f0b81b113e63f7db6da94fedef11b2119b4088b89664fb9a3cb658')
26		const h = new BigNumber(Buffer.from(hHex, "hex"))
27		assert.strictEqual(h.toString(), '70622639689279718371527342103894932928233838121221666359043189029713682937432')
28	})
29
30	it("should decode points in the secp256k1 curve", () => {
31		const tokenR = "7cfe4af054e13b4e7231d876d23205fb5f939ac8185271ca6b64c635a365faae259fb8cabdb06dde39d1ebeada3cb75cb9739621a79c61a8cf1e9a38abaf782a"
32		const point = decodePoint("04" + tokenR)
33		assert.strictEqual(point.getX().toString(16), tokenR.substr(0, 64))
34		assert.strictEqual(point.getY().toString(16), tokenR.substr(64))
35	})
36})
37
38describe("blind signatures", function () {
39	it("should blind, unblind and verify", async () => {
40		const { sk, pk } = newKeyPair()
41
42		const { k, signerR } = newRequestParameters()
43
44		const msg = messageToBigNumber("test")
45
46		const { mBlinded, userSecretData } = blind(msg, signerR)
47
48		const sBlind = blindSign(sk, mBlinded, k)
49
50		const sig = unblind(sBlind, userSecretData)
51
52		const verified = verify(msg, sig, pk)
53		assert(verified)
54	})
55})