circomlib/test/comparators.js

Basic circuits library for Circom

const chai = require("chai");
const path = require("path");
const F1Field = require("ffjavascript").F1Field;
const Scalar = require("ffjavascript").Scalar;
exports.p = Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617");
const Fr = new F1Field(exports.p);

const wasm_tester = require("circom_tester").wasm;

const assert = chai.assert;

describe("Comparators test", function ()  {

    this.timeout(100000);

    it("Should create a iszero circuit", async() => {
        const circuit = await wasm_tester(path.join(__dirname, "circuits", "iszero.circom"));

        let witness;
        witness = await circuit.calculateWitness({ "in": 111}, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": 0 }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));
    });
    it("Should create a isequal circuit", async() => {
        const circuit = await wasm_tester(path.join(__dirname, "circuits", "isequal.circom"));

        let witness;
        witness = await circuit.calculateWitness({ "in": [111,222] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));


        witness = await circuit.calculateWitness({ "in": [444,444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));
    });
    it("Should create a comparison lessthan", async() => {
        const circuit = await wasm_tester(path.join(__dirname, "circuits", "lessthan.circom"));

        let witness;
        witness = await circuit.calculateWitness({ "in": [333,444] }), true;
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));
    });
    it("Should create a comparison lesseqthan", async() => {

        const circuit = await wasm_tester(path.join(__dirname, "circuits", "lesseqthan.circom"));

        let witness;
        witness = await circuit.calculateWitness({ "in": [333,444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));
    });
    it("Should create a comparison greaterthan", async() => {

        const circuit = await wasm_tester(path.join(__dirname, "circuits", "greaterthan.circom"));

        let witness;
        witness = await circuit.calculateWitness({ "in": [333,444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));
    });
    it("Should create a comparison greatereqthan", async() => {
        const circuit = await wasm_tester(path.join(__dirname, "circuits", "greatereqthan.circom"));

        let witness;
        witness = await circuit.calculateWitness({ "in": [333,444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in":[1,1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [661, 660] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [0, 1] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [0, 444] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(0)));

        witness = await circuit.calculateWitness({ "in": [1, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [555, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));

        witness = await circuit.calculateWitness({ "in": [0, 0] }, true);
        assert(Fr.eq(Fr.e(witness[0]), Fr.e(1)));
        assert(Fr.eq(Fr.e(witness[1]), Fr.e(1)));
    });
});