circomlibjs/test/smt.js

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import { describe, it, before } from 'node:test'
import assert from 'node:assert'
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import buildBabyjub from "../src/babyjub.js";
import {newMemEmptyTrie} from "../src/smt.js";
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describe("SMT Javascript test", { timeout: 100000 }, function () {
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let Fr;
before(async () => {
const babyjub = await buildBabyjub();
Fr = babyjub.F;
});
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it("Should insert 2 elements and empty them", async () => {
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const tree = await newMemEmptyTrie();
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const key1 = Fr.e(111);
const value1 = Fr.e(222);
const key2 = Fr.e(333);
const value2 = Fr.e(444);
await tree.insert(key1,value1);
await tree.insert(key2,value2);
await tree.delete(key2);
await tree.delete(key1);
assert(Fr.isZero(tree.root));
});
it("Should insert 3 elements in dferent order and should be the same", async () => {
const keys = [Fr.e(8), Fr.e(9), Fr.e(32)];
const values = [Fr.e(88), Fr.e(99), Fr.e(3232)];
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const tree1 = await newMemEmptyTrie();
const tree2 = await newMemEmptyTrie();
const tree3 = await newMemEmptyTrie();
const tree4 = await newMemEmptyTrie();
const tree5 = await newMemEmptyTrie();
const tree6 = await newMemEmptyTrie();
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await tree1.insert(keys[0],values[0]);
await tree1.insert(keys[1],values[1]);
await tree1.insert(keys[2],values[2]);
await tree2.insert(keys[0],values[0]);
await tree2.insert(keys[2],values[2]);
await tree2.insert(keys[1],values[1]);
await tree3.insert(keys[1],values[1]);
await tree3.insert(keys[0],values[0]);
await tree3.insert(keys[2],values[2]);
await tree4.insert(keys[1],values[1]);
await tree4.insert(keys[2],values[2]);
await tree4.insert(keys[0],values[0]);
await tree5.insert(keys[2],values[2]);
await tree5.insert(keys[0],values[0]);
await tree5.insert(keys[1],values[1]);
await tree6.insert(keys[2],values[2]);
await tree6.insert(keys[1],values[1]);
await tree6.insert(keys[0],values[0]);
assert(Fr.eq(tree1.root, tree2.root));
assert(Fr.eq(tree2.root, tree3.root));
assert(Fr.eq(tree3.root, tree4.root));
assert(Fr.eq(tree4.root, tree5.root));
assert(Fr.eq(tree5.root, tree6.root));
assert.equal(Object.keys(tree1.db.nodes).length, Object.keys(tree2.db.nodes).length);
assert.equal(Object.keys(tree2.db.nodes).length, Object.keys(tree3.db.nodes).length);
assert.equal(Object.keys(tree3.db.nodes).length, Object.keys(tree4.db.nodes).length);
assert.equal(Object.keys(tree4.db.nodes).length, Object.keys(tree5.db.nodes).length);
assert.equal(Object.keys(tree5.db.nodes).length, Object.keys(tree6.db.nodes).length);
await tree1.delete(keys[0]);
await tree1.delete(keys[1]);
await tree2.delete(keys[1]);
await tree2.delete(keys[0]);
assert(Fr.eq(tree1.root, tree2.root));
await tree3.delete(keys[0]);
await tree3.delete(keys[2]);
await tree4.delete(keys[2]);
await tree4.delete(keys[0]);
assert(Fr.eq(tree3.root, tree4.root));
await tree5.delete(keys[1]);
await tree5.delete(keys[2]);
await tree6.delete(keys[2]);
await tree6.delete(keys[1]);
assert(Fr.eq(tree5.root, tree6.root));
await tree1.delete(keys[2]);
await tree2.delete(keys[2]);
await tree3.delete(keys[1]);
await tree4.delete(keys[1]);
await tree5.delete(keys[0]);
await tree6.delete(keys[0]);
assert(Fr.isZero(tree1.root));
assert(Fr.isZero(tree2.root));
assert(Fr.isZero(tree3.root));
assert(Fr.isZero(tree4.root));
assert(Fr.isZero(tree5.root));
assert(Fr.isZero(tree6.root));
assert.equal(Object.keys(tree1.db.nodes).length, 0);
assert.equal(Object.keys(tree2.db.nodes).length, 0);
assert.equal(Object.keys(tree3.db.nodes).length, 0);
assert.equal(Object.keys(tree4.db.nodes).length, 0);
assert.equal(Object.keys(tree5.db.nodes).length, 0);
assert.equal(Object.keys(tree6.db.nodes).length, 0);
});
it("Insert and remove 100 numbers randomly", async () => {
function perm(a) {
const arr = a.slice();
const rArr = [];
for (let i=0; i<arr.length; i++) {
let rIdx = Math.floor(Math.random() * (arr.length - i));
rArr.push(arr[rIdx]);
arr[rIdx] = arr[arr.length - i - 1];
}
return rArr;
}
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const tree = await newMemEmptyTrie();
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const arr = [];
const N = 100;
for (let i=0; i<N; i++) {
arr.push(Fr.e(i));
}
const insArr = perm(arr);
for (let i=0; i<N; i++) {
await tree.insert(insArr[i], i);
}
const delArr = perm(insArr);
for (let i=0; i<N; i++) {
await tree.delete(delArr[i]);
}
assert(Fr.isZero(tree.root));
assert.equal(Object.keys(tree.db.nodes).length, 0);
});
it("Should test update", async () => {
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const tree1 = await newMemEmptyTrie();
const tree2 = await newMemEmptyTrie();
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await tree1.insert(8,88);
await tree1.insert(9,99,);
await tree1.insert(32,3232);
await tree2.insert(8,888);
await tree2.insert(9,999);
await tree2.insert(32,323232);
await tree1.update(8, 888);
await tree1.update(9, 999);
await tree1.update(32, 323232);
assert(Fr.eq(tree1.root, tree2.root));
});
it("Should test update with same key-value", async () => {
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const tree1 = await newMemEmptyTrie();
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await tree1.insert(8,88);
await tree1.update(8,88);
const res = await tree1.db.get(tree1.root);
assert.notEqual(res, undefined);
});
});