89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
const chai = require("chai");
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const path = require("path");
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const snarkjs = require("snarkjs");
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const compiler = require("circom");
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const assert = chai.assert;
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const bigInt = snarkjs.bigInt;
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function print(circuit, w, s) {
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console.log(s + ": " + w[circuit.getSignalIdx(s)]);
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}
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function getBits(v, n) {
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const res = [];
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for (let i=0; i<n; i++) {
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if (v.shr(i).isOdd()) {
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res.push(bigInt.one);
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} else {
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res.push(bigInt.zero);
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}
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}
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return res;
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}
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const q = bigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617");
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describe("Sign test", () => {
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let circuit;
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before( async() => {
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const cirDef = await compiler(path.join(__dirname, "circuits", "sign_test.circom"));
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circuit = new snarkjs.Circuit(cirDef);
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console.log("NConstrains: " + circuit.nConstraints);
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});
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it("Sign of 0", async () => {
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const inp = getBits(bigInt.zero, 254);
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const w = circuit.calculateWitness({in: inp});
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assert( w[circuit.getSignalIdx("main.sign")].equals(bigInt(0)) );
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});
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it("Sign of 3", async () => {
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const inp = getBits(bigInt(3), 254);
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const w = circuit.calculateWitness({in: inp});
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assert( w[circuit.getSignalIdx("main.sign")].equals(bigInt(0)) );
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});
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it("Sign of q/2", async () => {
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const inp = getBits(q.shr(bigInt.one), 254);
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const w = circuit.calculateWitness({in: inp});
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assert( w[circuit.getSignalIdx("main.sign")].equals(bigInt(0)) );
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});
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it("Sign of q/2+1", async () => {
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const inp = getBits(q.shr(bigInt.one).add(bigInt.one), 254);
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const w = circuit.calculateWitness({in: inp});
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assert( w[circuit.getSignalIdx("main.sign")].equals(bigInt(1)) );
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});
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it("Sign of q-1", async () => {
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const inp = getBits(q.sub(bigInt.one), 254);
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const w = circuit.calculateWitness({in: inp});
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assert( w[circuit.getSignalIdx("main.sign")].equals(bigInt(1)) );
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});
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it("Sign of q", async () => {
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const inp = getBits(q, 254);
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const w = circuit.calculateWitness({in: inp});
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assert( w[circuit.getSignalIdx("main.sign")].equals(bigInt(1)) );
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});
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it("Sign of all ones", async () => {
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const inp = getBits(bigInt(1).shl(254).sub(bigInt(1)), 254);
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const w = circuit.calculateWitness({in: inp});
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assert( w[circuit.getSignalIdx("main.sign")].equals(bigInt(1)) );
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});
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});
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