Added hardhat-circom and update indent size to be 2

.editorconfig

@@ -7,7 +7,7 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 max_line_length = 120
-indent_size = 4
+indent_size = 2
 
 [*.md]
 trim_trailing_whitespace = false

.github/pull_request_template.md

@@ -29,10 +29,10 @@
 
 <!-- Please check if the PR fulfills these requirements. -->
 
--   [ ] My code follows the style guidelines of this project
--   [ ] I have performed a self-review of my code
--   [ ] I have commented my code, particularly in hard-to-understand areas
--   [ ] My changes generate no new warnings
--   [ ] I have run `yarn format` and `yarn lint` without getting any errors
--   [ ] I have added tests that prove my fix is effective or that my feature works
--   [ ] New and existing unit tests pass locally with my changes
+- [ ] My code follows the style guidelines of this project
+- [ ] I have performed a self-review of my code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] My changes generate no new warnings
+- [ ] I have run `yarn format` and `yarn lint` without getting any errors
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes

.github/workflows/style.yml

@@ -1,25 +1,25 @@
 name: style
 
 on:
-    pull_request:
-    push:
-        branches: ["main"]
+  pull_request:
+  push:
+    branches: ["main"]
 
 jobs:
-    style:
-        runs-on: ubuntu-latest
+  style:
+    runs-on: ubuntu-latest
 
-        steps:
-            - name: Checkout
-              uses: actions/checkout@v4
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
 
-            - name: Install Node.js
-              uses: actions/setup-node@v4
-              with:
-                  node-version: 20
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
 
-            - name: Install dependencies
-              run: yarn
+      - name: Install dependencies
+        run: yarn
 
-            - name: Run Prettier
-              run: yarn prettier
+      - name: Run Prettier
+        run: yarn prettier

.gitignore

@@ -55,5 +55,8 @@ node_modules/
 !.yarn/sdks
 !.yarn/versions
 
+# Circuit artifacts
+circuits/artifacts
+
 # own misc notes
 project-todo.md

.prettierrc.json

@@ -1,5 +1,5 @@
 {
-    "semi": true,
-    "arrowParens": "always",
-    "trailingComma": "none"
+  "semi": true,
+  "arrowParens": "always",
+  "trailingComma": "none"
 }

apps/contracts/.solhint.json

@@ -1,3 +1,3 @@
 {
-    "extends": "solhint:default"
+  "extends": "solhint:default"
 }

apps/contracts/circuits/lib.circom

@@ -0,0 +1,24 @@
+pragma circom 2.1.6;
+
+include "../../../node_modules/circomlib/circuits/babyjub.circom";
+
+template AddNumOnEllipticCurve () {
+    signal input x1;
+    signal input y1;
+    signal input x2;
+    signal input y2;
+
+    signal input xout;
+    signal input yout;
+
+    component babyAdd = BabyAdd();
+    babyAdd.x1 <== x1;
+    babyAdd.y1 <== y1;
+    babyAdd.x2 <== x2;
+    babyAdd.y2 <== y2;
+
+    xout === babyAdd.xout;
+    yout === babyAdd.yout;
+}
+
+component main = AddNumOnEllipticCurve();

apps/contracts/circuits/lib.json

@@ -0,0 +1,8 @@
+{
+  "x1": "17777552123799933955779906779655732241715742912184938656739573121738514868268",
+  "y1": "2626589144620713026669568689430873010625803728049924121243784502389097019475",
+  "x2": "17777552123799933955779906779655732241715742912184938656739573121738514868268",
+  "y2": "2626589144620713026669568689430873010625803728049924121243784502389097019475",
+  "xout": "6890855772600357754907169075114257697580319025794532037257385534741338397365",
+  "yout": "4338620300185947561074059802482547481416142213883829469920100239455078257889"
+}

apps/contracts/contracts/Feedback.sol

@@ -4,36 +4,36 @@ pragma solidity ^0.8.23;
 import "@semaphore-protocol/contracts/interfaces/ISemaphore.sol";
 
 contract Feedback {
-    ISemaphore public semaphore;
-
-    uint256 public groupId;
-
-    constructor(address semaphoreAddress) {
-        semaphore = ISemaphore(semaphoreAddress);
-
-        groupId = semaphore.createGroup(address(this));
-    }
-
-    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);
-    }
+  ISemaphore public semaphore;
+
+  uint256 public groupId;
+
+  constructor(address semaphoreAddress) {
+    semaphore = ISemaphore(semaphoreAddress);
+
+    groupId = semaphore.createGroup(address(this));
+  }
+
+  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);
+  }
 }