feat(WakuRln): zero indexed deployments and updated dependency (#8)

* fix: update submodule

* feat(rln): zero indexed deployment

.gitmodules

@@ -5,6 +5,7 @@
 [submodule "lib/rln-contract"]
 	path = lib/rln-contract
 	url = https://github.com/vacp2p/rln-contract
+	branch = 35f2182
 [submodule "lib/openzeppelin-contracts"]
 	path = lib/openzeppelin-contracts
 	url = https://github.com/Openzeppelin/openzeppelin-contracts

contracts/WakuRln.sol

@@ -10,7 +10,10 @@ error NotImplemented();
 contract WakuRln is Ownable, RlnBase {
     uint16 public immutable contractIndex;
 
-    constructor(address _poseidonHasher, uint16 _contractIndex) Ownable() RlnBase(0, 20, _poseidonHasher, address(0)) {
+    constructor(
+        address _poseidonHasher,
+        uint16 _contractIndex
+    ) Ownable() RlnBase(0, 20, _poseidonHasher, address(0)) {
         contractIndex = _contractIndex;
     }
 
@@ -19,15 +22,16 @@ contract WakuRln is Ownable, RlnBase {
     function _register(uint256 idCommitment) internal {
         _validateRegistration(idCommitment);
 
-        members[idCommitment] = 1;
+        members[idCommitment] = idCommitmentIndex;
+        memberExists[idCommitment] = true;
 
         emit MemberRegistered(idCommitment, idCommitmentIndex);
         idCommitmentIndex += 1;
     }
 
     function register(uint256[] calldata idCommitments) external onlyOwner {
         uint256 len = idCommitments.length;
-        for (uint256 i = 0; i < len;) {
+        for (uint256 i = 0; i < len; ) {
             _register(idCommitments[i]);
             unchecked {
                 ++i;
@@ -39,21 +43,28 @@ contract WakuRln is Ownable, RlnBase {
         revert NotImplemented();
     }
 
-    function slash(uint256 idCommitment, address payable receiver, uint256[8] calldata proof) external pure override {
+    function slash(
+        uint256 idCommitment,
+        address payable receiver,
+        uint256[8] calldata proof
+    ) external pure override {
         revert NotImplemented();
     }
 
-    function _validateRegistration(uint256 idCommitment) internal view override {
-        if (!isValidCommitment(idCommitment)) revert InvalidIdCommitment(idCommitment);
-        if (members[idCommitment] != 0) revert DuplicateIdCommitment();
+    function _validateRegistration(
+        uint256 idCommitment
+    ) internal view override {
+        if (!isValidCommitment(idCommitment))
+            revert InvalidIdCommitment(idCommitment);
+        if (memberExists[idCommitment] == true) revert DuplicateIdCommitment();
         if (idCommitmentIndex >= SET_SIZE) revert FullTree();
     }
 
-    function _validateSlash(uint256 idCommitment, address payable receiver, uint256[8] calldata proof)
-        internal
-        pure
-        override
-    {
+    function _validateSlash(
+        uint256 idCommitment,
+        address payable receiver,
+        uint256[8] calldata proof
+    ) internal pure override {
         revert NotImplemented();
     }
 

deployments/allDeployments.json

@@ -5,7 +5,7 @@
       "chainId": "11155111",
       "contracts": {
         "PoseidonHasher": {
-          "address": "0xcBC443bAE23a0BeF71d7f23588108C9929C582C2",
+          "address": "0x9c1c939aCB5c356c91fF2f27E9FD29C5C95E671b",
           "abi": [
             {
               "inputs": [],
@@ -42,7 +42,7 @@
           ]
         },
         "WakuRlnRegistry": {
-          "address": "0x8e1F3742B987d8BA376c0CBbD7357fE1F003ED71",
+          "address": "0x0A988fd9CA5BAebDf098b8A73621b2AaDa6492E8",
           "abi": [
             {
               "inputs": [
@@ -289,7 +289,7 @@
           ]
         },
         "WakuRlnStorage_0": {
-          "address": "0xb61a949493847FF51A82d2617FEdAeD5D67cf785",
+          "address": "0x02A29114ECDE0Da4D6DB61eAE73a86486cB88c10",
           "abi": [
             {
               "inputs": [
@@ -487,6 +487,25 @@
               "stateMutability": "view",
               "type": "function"
             },
+            {
+              "inputs": [
+                {
+                  "internalType": "uint256",
+                  "name": "",
+                  "type": "uint256"
+                }
+              ],
+              "name": "memberExists",
+              "outputs": [
+                {
+                  "internalType": "bool",
+                  "name": "",
+                  "type": "bool"
+                }
+              ],
+              "stateMutability": "view",
+              "type": "function"
+            },
             {
               "inputs": [
                 {