Allowing to decode points from the curve

test/index.test.ts

@@ -1,7 +1,9 @@
 import * as assert from 'assert'
 
 import {
-	bigNumberFromString,
+	stringToBigNumber,
+	messageToBigNumber,
+	decodePoint,
 	ecParams,
 	newKeyPair,
 	newRequestParameters,
@@ -15,26 +17,31 @@ import {
 } from "../src/index"
 
 describe("keccak256", function () {
-	it("keccak256", async () => {
-		const msg = Buffer.from("test", 'utf8')
-		const m = new BigNumber(msg)
+	it("should hash strings and big numbers", async () => {
+		const m = messageToBigNumber("test")
+		assert.strictEqual('1952805748', m.toString())
+
 		const hHex = hashBigNumber(m)
 		assert.strictEqual(hHex, '9c22ff5f21f0b81b113e63f7db6da94fedef11b2119b4088b89664fb9a3cb658')
 		const h = new BigNumber(Buffer.from(hHex, "hex"))
 		assert.strictEqual(h.toString(), '70622639689279718371527342103894932928233838121221666359043189029713682937432')
 	})
+
+	it("should decode points in the secp256k1 curve", () => {
+		const tokenR = "7cfe4af054e13b4e7231d876d23205fb5f939ac8185271ca6b64c635a365faae259fb8cabdb06dde39d1ebeada3cb75cb9739621a79c61a8cf1e9a38abaf782a"
+		const point = decodePoint("04" + tokenR)
+		assert.strictEqual(point.getX().toString(16), tokenR.substr(0, 64))
+		assert.strictEqual(point.getY().toString(16), tokenR.substr(64))
+	})
 })
 
-describe("test blind", function () {
-	it("should blind", async () => {
+describe("blind signatures", function () {
+	it("should blind, unblind and verify", async () => {
 		const { sk, pk } = newKeyPair()
 
 		const { k, signerR } = newRequestParameters()
 
-		const msg = new BigNumber(
-			Buffer.from("test", 'utf8')
-		)
-		assert.strictEqual('1952805748', msg.toString())
+		const msg = messageToBigNumber("test")
 
 		const { mBlinded, userSecretData } = blind(msg, signerR)