Add CLI Foundry Template (cont.)

packages/cli-template-contracts-foundry/.env.example

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+SEPOLIA_RPC_URL=
+PRIVATE_KEY=
+ETHERSCAN_API_KEY=

packages/cli-template-contracts-foundry/.gitignore

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+node_modules
+.env
+
+# solidity-coverage files
+/coverage
+/coverage.json
+
+# Output of 'npm pack'
+*.tgz
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Optional npm cache directory
+.npm
+.DS_Store
+
+# yarn v3
+.pnp.*
+.pnp.js
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Foundry artifact
+cache/
+out/
+
+# artifact for deploying on local Anvil node
+**/31337
+

packages/cli-template-contracts-foundry/.prettierrc.json

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+{
+    "semi": false,
+    "arrowParens": "always",
+    "trailingComma": "none",
+    "plugins": ["prettier-plugin-solidity"]
+}

packages/cli-template-contracts-foundry/.solhint.json

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+{
+    "extends": "solhint:recommended",
+    "rules": {
+        "func-visibility": ["error", { "ignoreConstructors": true }]
+    }
+}

packages/cli-template-contracts-foundry/.yarnrc.yml

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+compressionLevel: mixed
+
+enableGlobalCache: false
+
+nodeLinker: node-modules
+
+yarnPath: .yarn/releases/yarn-4.1.0.cjs

packages/cli-template-contracts-foundry/README.md

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+# Semaphore Foundry Template
+
+This project demonstrates a basic Semaphore use case. It comes with a sample contract, a test for that contract and a sample script that deploys that contract.
+
+## Prerequisites
+
+This project requires [**Foundry**](https://getfoundry.sh/), and thus a [**Rust environment**](https://www.rust-lang.org/), installed in the machine.
+
+## Install
+
+### Install dependencies
+
+```bash
+yarn
+```
+
+## Usage
+
+### Compile contracts
+
+```bash
+yarn compile
+```
+
+### Test contracts
+
+```bash
+yarn test
+```
+
+You can also generate a test coverage report:
+
+```bash
+yarn test:coverage
+```
+
+Or a test gas report:
+
+```bash
+yarn test:gas-report
+```
+
+You can also start a local [Anvil node](https://book.getfoundry.sh/anvil/) with Semaphore and Feedback contracts deployed on it with:
+
+```bash
+yarn dev
+```
+
+### Code quality and formatting
+
+Run [solhint](https://github.com/protofire/solhint) to analyze the code and catch bugs:
+
+```bash
+yarn lint
+```
+
+Run [Prettier](https://prettier.io/) to check formatting rules:
+
+```bash
+yarn prettier
+```
+
+Or to automatically format the code:
+
+```bash
+yarn prettier:write
+```
+
+### Integrating with Semaphore Boilerplate
+
+You can also integrate this project with [Semaphore Boilerplate](https://github.com/semaphore-protocol/boilerplate), using this project as the contract end and connecting with Boilerplate front end.
+
+1. In `cli-template-contracts-foundry` package directory, run:
+
+    ```sh
+    yarn install
+    yarn dev
+    ```
+
+    After running `yarn dev`, notice the output of
+
+    ```sh
+    # ...
+    # ...
+
+    == Return ==
+    feedbackAddr: address 0x6f1AFCA8BCA87bF02091AF6187a5002802f9FB31
+    semaphoreAddr: address 0xb730ce6CAE3FB706e83E4E00dFA31623966570eB
+    semaphoreVerifierAddr: address 0xE2c114f548bEf410eaCe04D0390b61cc963df295
+
+    # ...
+    # ...
+    ```
+
+2. Now, with another terminal, clone Semaphore Boilerplate down:
+
+    ```sh
+    # Clone Semaphore boilerplate and build dependencies
+    git clone https://github.com/semaphore-protocol/boilerplate.git
+    cd boilerplate
+    yarn install
+
+    # Use the sample .env.example
+    cp .env.example .env
+    ```
+
+3. Open the file `apps/web-app/.env.development`. Modify the values of `NEXT_PUBLIC_FEEDBACK_CONTRACT_ADDRESS` and `NEXT_PUBLIC_SEMAPHORE_CONTRACT_ADDRESS` with **feedbackAddr** and **semaphoreAddr** values shown in step 1.
+
+4. Run the Boilerplate front end:
+
+    ```sh
+    yarn dev:web-app
+    ```

packages/cli-template-contracts-foundry/foundry.toml

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+[profile.default]
+src = "src"
+out = "out"
+script = "script"
+libs = ["node_modules"]
+allow_paths = ["*", "../.."]
+
+[rpc_endpoints]
+anvil = "http://127.0.0.1:8545"
+# sepolia = "${SEPOLIA_RPC_URL}"
+
+[etherscan]
+# sepolia = { key = "${ETHERSCAN_API_KEY}" }
+
+# See more config options https://github.com/foundry-rs/foundry/blob/master/crates/config/README.md#all-options

packages/cli-template-contracts-foundry/package.json

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+{
+    "name": "@semaphore-protocol/cli-template-contracts-foundry",
+    "version": "4.7.3",
+    "description": "Semaphore Foundry template.",
+    "license": "Unlicense",
+    "devDependencies": {
+        "@semaphore-protocol/contracts": "4.7.3",
+        "@zk-kit/lean-imt.sol": "2.0.0",
+        "forge-std": "github:foundry-rs/forge-std#v1.9.4",
+        "poseidon-solidity": "0.0.5",
+        "prettier": "^3.2.5",
+        "prettier-plugin-solidity": "^1.3.1",
+        "solhint": "^4.1.1",
+        "wait-on": "^8.0.1"
+    },
+    "scripts": {
+        "dev": "anvil & (wait-on tcp:8545 && forge script script/DeployFeedback.s.sol --rpc-url anvil --broadcast --sender 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266)",
+        "compile": "forge build",
+        "clean": "forge clean",
+        "test": "forge test -vvv",
+        "test:report-gas": "forge test --gas-report",
+        "test:coverage": "forge coverage",
+        "lint": "yarn solhint \"{script,src,test}/**/*.sol\"",
+        "prettier": "prettier -c \"**/*.{json,md,svg,yml,sol}\"",
+        "prettier:write": "prettier -w \"**/*.{json,md,svg,yml,sol}\"",
+        "check": "yarn test & yarn lint & yarn prettier"
+    },
+    "files": [
+        "src",
+        "test",
+        "script",
+        "package.json",
+        "foundry.toml",
+        "remappings.txt",
+        "README.md"
+    ],
+    "publishConfig": {
+        "access": "public"
+    },
+    "packageManager": "[email protected]"
+}

packages/cli-template-contracts-foundry/remappings.txt

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+@semaphore/contracts/=./node_modules/@semaphore-protocol/contracts/
+@zk-kit/lean-imt.sol/=./node_modules/@zk-kit/lean-imt.sol/
+forge-std/=./node_modules/forge-std/src/
+poseidon-solidity/=./node_modules/poseidon-solidity/

packages/cli-template-contracts-foundry/script/DeployFeedback.s.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.23;
+
+import {Feedback} from "../src/Feedback.sol";
+import {Semaphore} from "@semaphore/contracts/Semaphore.sol";
+import {SemaphoreVerifier} from "@semaphore/contracts/base/SemaphoreVerifier.sol";
+import {ISemaphoreVerifier} from "@semaphore/contracts/interfaces/ISemaphoreVerifier.sol";
+import {Script} from "forge-std/Script.sol";
+
+// Passing SALT parameter to use CREATE2 for deterministic contract address
+bytes32 constant SALT = bytes32(0);
+
+contract DeployFeedback is Script {
+    function run() external returns (address feedbackAddr, address semaphoreAddr, address semaphoreVerifierAddr) {
+        // Default to use the first test user private key of anvil node
+        uint256 deployerPrivateKey = vm.envOr(
+            "PRIVATE_KEY",
+            uint256(0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80)
+        );
+
+        vm.startBroadcast(deployerPrivateKey);
+
+        // Deploy SemaphoreVerifier
+        SemaphoreVerifier semaphoreVerifierContract = new SemaphoreVerifier{salt: SALT}();
+        semaphoreVerifierAddr = address(semaphoreVerifierContract);
+
+        // Deploy Semaphore
+        Semaphore semaphoreContract = new Semaphore{salt: SALT}(ISemaphoreVerifier(semaphoreVerifierAddr));
+        semaphoreAddr = address(semaphoreContract);
+
+        // Deploy Feedback
+        Feedback feedbackContract = new Feedback{salt: SALT}(semaphoreAddr);
+        feedbackAddr = address(feedbackContract);
+
+        vm.stopBroadcast();
+    }
+}

packages/cli-template-contracts-foundry/src/Feedback.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.23;
+
+import {ISemaphore} from "@semaphore/contracts/interfaces/ISemaphore.sol";
+
+contract Feedback {
+    ISemaphore public semaphore;
+
+    uint256 public groupId;
+
+    constructor(address semaphoreAddress) {
+        semaphore = ISemaphore(semaphoreAddress);
+
+        groupId = semaphore.createGroup();
+    }
+
+    function joinGroup(uint256 identityCommitment) external {
+        semaphore.addMember(groupId, identityCommitment);
+    }
+
+    function sendFeedback(
+        uint256 merkleTreeDepth,
+        uint256 merkleTreeRoot,
+        uint256 nullifier,
+        uint256 feedback,
+        uint256[8] calldata points
+    ) external {
+        ISemaphore.SemaphoreProof memory proof = ISemaphore.SemaphoreProof(
+            merkleTreeDepth,
+            merkleTreeRoot,
+            nullifier,
+            feedback,
+            groupId,
+            points
+        );
+
+        semaphore.validateProof(groupId, proof);
+    }
+}

packages/cli-template-contracts-foundry/test/Feedback.t.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.23;
+
+import {Test} from "forge-std/Test.sol";
+import {ISemaphore} from "@semaphore/contracts/interfaces/ISemaphore.sol";
+import {ISemaphoreGroups} from "@semaphore/contracts/interfaces/ISemaphoreGroups.sol";
+import {Feedback} from "../src/Feedback.sol";
+import {DeployFeedback} from "../script/DeployFeedback.s.sol";
+
+contract FeedbackTest is Test {
+    event MemberAdded(uint256 indexed groupId, uint256 index, uint256 identityCommitment, uint256 merkleTreeRoot);
+
+    Feedback internal feedbackContract;
+    ISemaphore internal semaphoreContract;
+    ISemaphoreGroups internal semaphoreGroups;
+    uint256 internal groupId;
+
+    function setUp() external {
+        DeployFeedback deployFeedback = new DeployFeedback();
+        (address feedbackAddress, address semaphoreAddress, ) = deployFeedback.run();
+        feedbackContract = Feedback(feedbackAddress);
+        semaphoreContract = ISemaphore(semaphoreAddress);
+        semaphoreGroups = ISemaphoreGroups(semaphoreAddress);
+        groupId = feedbackContract.groupId();
+    }
+
+    function testGroupCreatedInConstructor() public view {
+        uint256 groupCount = semaphoreContract.groupCounter();
+        assertEq(groupCount, 1);
+    }
+
+    function testJoinGroup() public {
+        // The commitment below is generated with private key of the first account in Anvil
+        uint256 identityCommitment = 15072455385723004728391568434269917452175057560864330595979104241296826134229;
+
+        // Test: expect an event emitted. Check for all event topics and data
+        vm.expectEmit(true, true, true, true);
+        emit MemberAdded(groupId, 0, identityCommitment, identityCommitment);
+
+        feedbackContract.joinGroup(identityCommitment);
+    }
+
+    function testSendFeedback() public {
+        uint256[] memory commitments = new uint256[](2);
+        commitments[0] = uint256(11005642493773047649202648265396872197147567800455247120861783398111750817516);
+        commitments[1] = uint256(14473821761500463903284857947161896352613497175238126022206384102438097355186);
+
+        for (uint256 i = 0; i < commitments.length; ++i) {
+            feedbackContract.joinGroup(commitments[i]);
+        }
+
+        uint256 merkleTreeDepth = 1;
+        uint256 merkleTreeRoot = semaphoreGroups.getMerkleTreeRoot(groupId);
+        uint256 feedback = uint256(bytes32("Hello World"));
+
+        // These values are computed by running through @semaphore-protocol/circuits
+        uint256 nullifier = 14622092170088252518938850323258916742048811914834592843410744760450844885096;
+        uint256[8] memory points = [
+            2004484873491928515306456072357737929124240734208600886081152392890959117520,
+            21291026142870585364296731900941597996672838511394659364623185352043543529323,
+            4657264777014371046112557309523098953851041383509685591373847255581509612788,
+            6904165961903336246592681066375875983213983935764940579845010085396463328555,
+            1952750241178995674697344628236393389729638396609772141225880353616301956443,
+            106937615136633409337870509099767689510837462832227699340906789167349502398,
+            13080722838047436988558418790480431472161933638137155324683844808531903905810,
+            2547578906197450986657523555784319153413167960139250957065929818900731634820
+        ];
+
+        vm.expectEmit(true, true, true, true);
+        emit ISemaphore.ProofValidated(groupId, merkleTreeDepth, merkleTreeRoot, nullifier, feedback, groupId, points);
+
+        feedbackContract.sendFeedback(merkleTreeDepth, merkleTreeRoot, nullifier, feedback, points);
+    }
+}