Initial version that works

Includes the needed methods to do the full flow:
- newKeyPair
- newRequestParameters
- blind
- blindSign
- unblind
- verify

test/index.test.js

@@ -0,0 +1,39 @@
+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);
+    });
+});