Add initial version of deposit circuit

test/circuits/deposit.test.ts

@@ -0,0 +1,72 @@
+const path = require("path");
+const tester = require("circom").tester;
+const chai = require("chai");
+const assert = chai.assert;
+const circomlib = require("circomlib");
+const smt = require("circomlib").smt;
+
+export {};
+
+describe("deposit test", function () {
+    this.timeout(200000);
+
+
+    it("Test Deposit", async () => {
+        const circuit = await tester(
+            path.join(__dirname, "../../circuits", "deposit.circom"),
+            {reduceConstraints: false}
+        );
+
+        const nLevels = 5;
+        const secret = "1234567890";
+
+        const coinCode = "0";
+        const amount = '1000000000000000000';
+        const nullifier = "567891234";
+
+        const poseidon = circomlib.poseidon.createHash(6, 8, 57);
+        const commitment = poseidon([coinCode, amount, secret, nullifier]).toString();
+
+        // add commitment into SMT
+        let tree = await smt.newMemEmptyTrie();
+        await tree.insert(1, 0);
+        await tree.insert(2, 0);
+
+        let rootOld = tree.root;
+        let res = await tree.find(commitment);
+        // console.log(res);
+        assert(!res.found);
+        let siblingsOld = res.siblings;
+        while (siblingsOld.length < nLevels) {
+            siblingsOld.push("0");
+        };
+        console.log("siblingsOld", siblingsOld);
+
+        await tree.insert(commitment, 0);
+        let rootNew = tree.root;
+
+        res = await tree.find(commitment);
+        // console.log(res);
+        assert(res.found);
+        let siblingsNew = res.siblings;
+        while (siblingsNew.length < nLevels) {
+            siblingsNew.push("0");
+        };
+        console.log("siblingsNew", siblingsNew);
+        console.log("rootOld", rootOld);
+        console.log("rootNew", rootNew);
+        
+        const witness = await circuit.calculateWitness({
+            "coinCode": coinCode,
+            "amount": amount,
+            "secret": secret,
+            "nullifier": nullifier,
+            "siblingsOld": siblingsOld,
+            "siblingsNew": siblingsNew,
+            "rootOld": rootOld,
+            "rootNew": rootNew,
+            "commitment": commitment
+        });
+        await circuit.checkConstraints(witness);
+    });
+});