rln-interep-contract/test/rln.ts

import { expect, assert } from "chai";
import { ethers, deployments } from "hardhat";

describe("RLN", () => {
  beforeEach(async () => {
    await deployments.fixture(["RLN"]);
  });

  it("should register new memberships", async () => {
    const rln = await ethers.getContract("RLN", ethers.provider.getSigner(0));

    const price = await rln.MEMBERSHIP_DEPOSIT();

    // A valid pair of (id_secret, id_commitment) generated in rust
    const idCommitment =
      "0x0c3ac305f6a4fe9bfeb3eba978bc876e2a99208b8b56c80160cfb54ba8f02368";

    const registerTx = await rln["register(uint256)"](idCommitment, {
      value: price,
    });
    const txRegisterReceipt = await registerTx.wait();

    const pubkey = txRegisterReceipt.events[0].args.pubkey;

    // We ensure the registered id_commitment is the one we passed
    expect(
      pubkey.toHexString() === idCommitment,
      "registered commitment doesn't match passed commitment"
    );
  });

  it("should withdraw membership", async () => {
    const rln = await ethers.getContract("RLN", ethers.provider.getSigner(0));

    const price = await rln.MEMBERSHIP_DEPOSIT();

    // A valid pair of (id_secret, id_commitment) generated in rust
    const idSecret =
      "0x2a09a9fd93c590c26b91effbb2499f07e8f7aa12e2b4940a3aed2411cb65e11c";
    const idCommitment =
      "0x0c3ac305f6a4fe9bfeb3eba978bc876e2a99208b8b56c80160cfb54ba8f02368";

    const registerTx = await rln["register(uint256)"](idCommitment, {
      value: price,
    });
    const txRegisterReceipt = await registerTx.wait();

    const treeIndex = txRegisterReceipt.events[0].args.index;

    // We withdraw our id_commitment
    const receiverAddress = "0x000000000000000000000000000000000000dead";
    const withdrawTx = await rln.withdraw(idSecret, treeIndex, receiverAddress);

    const txWithdrawReceipt = await withdrawTx.wait();

    const withdrawalPk = txWithdrawReceipt.events[0].args.pubkey;
    const withdrawalTreeIndex = txWithdrawReceipt.events[0].args.index;

    // We ensure the registered id_commitment is the one we passed and that the index is the same
    expect(
      withdrawalPk.toHexString() === idCommitment,
      "withdraw commitment doesn't match registered commitment"
    );
    expect(
      withdrawalTreeIndex.toHexString() === treeIndex.toHexString(),
      "withdraw index doesn't match registered index"
    );
  });

  it("should not allow multiple registrations with same pubkey", async () => {
    const rln = await ethers.getContract("RLN", ethers.provider.getSigner(0));

    const price = await rln.MEMBERSHIP_DEPOSIT();

    // A valid pair of (id_secret, id_commitment) generated in rust
    const idCommitment =
      "0x0c3ac305f6a4fe9bfeb3eba978bc876e2a99208b8b56c80160cfb54ba8f02368";

    const registerTx = await rln["register(uint256)"](idCommitment, {
      value: price,
    });
    const txRegisterReceipt = await registerTx.wait();
    const index1 = txRegisterReceipt.events[0].args.index;

    // Send the same tx again
    const registerTx2 = await rln["register(uint256)"](idCommitment, {
      value: price,
    });
    const txRegisterReceipt2 = await registerTx2.wait();
    const index2 = txRegisterReceipt2.events[0].args.index;

    const pk1 = await rln.members(index1);
    const pk2 = await rln.members(index2);
    const samePk = pk1.toHexString() === pk2.toHexString();
    if (samePk) {
      assert(false, "same pubkey registered twice");
    }
  });

  it("[interep] should register new memberships", () => {
    // TODO
  });

  it("[interep] should withdraw membership", () => {
    // TODO
  });
});