75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
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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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const babyJub = require("../src/babyjub.js");
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const pedersen = require("../src/pedersenHash.js");
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describe("Pedersen test", function() {
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let circuit;
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this.timeout(100000);
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before( async() => {
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const cirDef = await compiler(path.join(__dirname, "circuits", "pedersen2_test.circom"));
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circuit = new snarkjs.Circuit(cirDef);
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console.log("NConstrains Pedersen2: " + circuit.nConstraints);
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});
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it("Should pedersen at zero", async () => {
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let w, xout, yout;
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w = circuit.calculateWitness({ in: 0});
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xout = w[circuit.getSignalIdx("main.out[0]")];
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yout = w[circuit.getSignalIdx("main.out[1]")];
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const b = Buffer.alloc(32);
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const h = pedersen.hash(b);
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const hP = babyJub.unpackPoint(h);
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/*
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console.log(`[${xout.toString()}, ${yout.toString()}]`);
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console.log(`[${hP[0].toString()}, ${hP[1].toString()}]`);
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*/
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assert(xout.equals(hP[0]));
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assert(yout.equals(hP[1]));
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});
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it("Should pedersen with 253 ones", async () => {
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let w, xout, yout;
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const n = bigInt.one.shl(253).sub(bigInt.one);
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console.log(n.toString(16));
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w = circuit.calculateWitness({ in: n});
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xout = w[circuit.getSignalIdx("main.out[0]")];
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yout = w[circuit.getSignalIdx("main.out[1]")];
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const b = Buffer.alloc(32);
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for (let i=0; i<31; i++) b[i] = 0xFF;
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b[31] = 0x1F;
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const h = pedersen.hash(b);
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const hP = babyJub.unpackPoint(h);
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/*
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console.log(`[${xout.toString()}, ${yout.toString()}]`);
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console.log(`[${hP[0].toString()}, ${hP[1].toString()}]`);
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*/
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assert(xout.equals(hP[0]));
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assert(yout.equals(hP[1]));
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});
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});
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