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const chai = require("chai");
const path = require("path");
const snarkjs = require("snarkjs");
const compiler = require("circom");
const smt = require("../src/smt.js");
const assert = chai.assert;
const bigInt = snarkjs.bigInt;
function print(circuit, w, s) {
console.log(s + ": " + w[circuit.getSignalIdx(s)]);
}
async function testInclusion(tree, key, circuit) {
const res = await tree.find(key);
assert(res.found);
let siblings = res.siblings;
while (siblings.length<10) siblings.push(bigInt(0));
const w = circuit.calculateWitness({
enabled: 1,
fnc: 0,
root: tree.root,
siblings: siblings,
oldKey: 0,
oldValue: 0,
isOld0: 0,
key: key,
value: res.foundValue
});
assert(circuit.checkWitness(w));
}
async function testExclusion(tree, key, circuit) {
const res = await tree.find(key);
assert(!res.found);
let siblings = res.siblings;
while (siblings.length<10) siblings.push(bigInt(0));
const w = circuit.calculateWitness({
enabled: 1,
fnc: 1,
root: tree.root,
siblings: siblings,
oldKey: res.isOld0 ? 0 : res.notFoundKey,
oldValue: res.isOld0 ? 0 : res.notFoundValue,
isOld0: res.isOld0 ? 1 : 0,
key: key,
value: 0
});
assert(circuit.checkWitness(w));
}
describe("SMT test", function () {
let circuit;
let tree;
this.timeout(100000);
before( async () => {
const cirDef = await compiler(path.join(__dirname, "circuits", "smtverifier10_test.circom"));
circuit = new snarkjs.Circuit(cirDef);
console.log("NConstrains SMTVerifier: " + circuit.nConstraints);
tree = await smt.newMemEmptyTrie();
await tree.insert(7,77);
await tree.insert(8,88);
await tree.insert(32,3232);
});
it("Check inclussion in a tree of 3", async () => {
await testInclusion(tree, 7, circuit);
await testInclusion(tree, 8, circuit);
await testInclusion(tree, 32, circuit);
});
it("Check exclussion in a tree of 3", async () => {
await testExclusion(tree, 0, circuit);
await testExclusion(tree, 6, circuit);
await testExclusion(tree, 9, circuit);
await testExclusion(tree, 33, circuit);
await testExclusion(tree, 31, circuit);
await testExclusion(tree, 16, circuit);
await testExclusion(tree, 64, circuit);
});
it("Check not enabled accepts any thing", async () => {
let siblings = [];
for (let i=0; i<10; i++) siblings.push(i);
const w = circuit.calculateWitness({
enabled: 0,
fnc: 0,
root: 1,
siblings: siblings,
oldKey: 22,
oldValue: 33,
isOld0: 0,
key: 44,
value: 0
});
assert(circuit.checkWitness(w));
});
});