feat: membership

.gas-snapshot

@@ -1,14 +1,11 @@
-WakuRlnV2Test:test__IdCommitmentToMetadata__DoesntExist() (gas: 16726)
-WakuRlnV2Test:test__InvalidPaginationQuery__EndIndexGTcommitmentIndex() (gas: 18249)
-WakuRlnV2Test:test__InvalidPaginationQuery__StartIndexGTEndIndex() (gas: 16130)
-WakuRlnV2Test:test__InvalidRegistration__DuplicateIdCommitment() (gas: 99502)
-WakuRlnV2Test:test__InvalidRegistration__FullTree() (gas: 14328)
-WakuRlnV2Test:test__InvalidRegistration__InvalidIdCommitment__LargerThanField() (gas: 15229)
-WakuRlnV2Test:test__InvalidRegistration__InvalidIdCommitment__Zero() (gas: 14004)
-WakuRlnV2Test:test__InvalidRegistration__InvalidUserMessageLimit__LargerThanMax() (gas: 17703)
-WakuRlnV2Test:test__InvalidRegistration__InvalidUserMessageLimit__Zero() (gas: 14085)
-WakuRlnV2Test:test__Upgrade() (gas: 3791109)
-WakuRlnV2Test:test__ValidPaginationQuery(uint32) (runs: 1000, μ: 445155, ~: 159972)
-WakuRlnV2Test:test__ValidPaginationQuery__OneElement() (gas: 119773)
-WakuRlnV2Test:test__ValidRegistration(uint256,uint32) (runs: 1000, μ: 124408, ~: 124408)
-WakuRlnV2Test:test__ValidRegistration__kats() (gas: 96616)
+WakuRlnV2Test:test__IdCommitmentToMetadata__DoesntExist() (gas: 27478)
+WakuRlnV2Test:test__InsertionNormalOrder(uint32) (runs: 1001, μ: 1123469, ~: 494837)
+WakuRlnV2Test:test__InvalidPaginationQuery__EndIndexGTcommitmentIndex() (gas: 18261)
+WakuRlnV2Test:test__InvalidPaginationQuery__StartIndexGTEndIndex() (gas: 16108)
+WakuRlnV2Test:test__InvalidRegistration__DuplicateIdCommitment() (gas: 249370)
+WakuRlnV2Test:test__InvalidRegistration__InvalidIdCommitment__Zero() (gas: 12135)
+WakuRlnV2Test:test__Upgrade() (gas: 6728616)
+WakuRlnV2Test:test__ValidPaginationQuery(uint32) (runs: 1002, μ: 226428, ~: 52927)
+WakuRlnV2Test:test__ValidPaginationQuery__OneElement() (gas: 262351)
+WakuRlnV2Test:test__ValidRegistration(uint256,uint32) (runs: 1001, μ: 268741, ~: 268741)
+WakuRlnV2Test:test__ValidRegistration__kats() (gas: 238744)

script/Deploy.s.sol

@@ -2,18 +2,22 @@
 pragma solidity >=0.8.19 <=0.9.0;
 
 import { WakuRlnV2 } from "../src/WakuRlnV2.sol";
+import { LinearPriceCalculator } from "../src/LinearPriceCalculator.sol";
 import { PoseidonT3 } from "poseidon-solidity/PoseidonT3.sol";
 import { LazyIMT } from "@zk-kit/imt.sol/LazyIMT.sol";
 import { ERC1967Proxy } from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
 import { UUPSUpgradeable } from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
 
 import { BaseScript } from "./Base.s.sol";
-import { DeploymentConfig } from "./DeploymentConfig.s.sol";
 
 contract Deploy is BaseScript {
     function run() public broadcast returns (WakuRlnV2 w, address impl) {
+        // TODO: Use the correct values when deploying to mainnet
+        address priceCalcAddr = address(new LinearPriceCalculator(address(0), 0.05 ether));
+        // TODO: set DAI address 0x6B175474E89094C44Da98b954EedeAC495271d0F
         impl = address(new WakuRlnV2());
-        bytes memory data = abi.encodeCall(WakuRlnV2.initialize, 100);
+        bytes memory data = abi.encodeCall(WakuRlnV2.initialize, (priceCalcAddr, 160_000, 20, 600, 30 days, 5 days));
+        // (priceCalcAddr,  160000, 20, 600, 30 days, 5 days)
         address proxy = address(new ERC1967Proxy(impl, data));
         w = WakuRlnV2(proxy);
     }

src/IPriceCalculator.sol

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.24;
+
+interface IPriceCalculator {
+    /// Returns the token and price to pay in `token` for some `_rateLimit`
+    /// @param _rateLimit the rate limit the user wants to acquire
+    /// @param _numberOfPeriods the number of periods the user wants to acquire
+    /// @return address of the erc20 token
+    /// @return uint price to pay for acquiring the specified `_rateLimit`
+    function calculate(uint256 _rateLimit, uint32 _numberOfPeriods) external view returns (address, uint256);
+}

src/LinearPriceCalculator.sol

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.24;
+
+import { Ownable } from "openzeppelin-contracts/contracts/access/Ownable.sol";
+import { IPriceCalculator } from "./IPriceCalculator.sol";
+
+/// @title Linear Price Calculator to determine the price to acquire a membership
+contract LinearPriceCalculator is IPriceCalculator, Ownable {
+    /// @notice Address of the ERC20 token accepted by this contract. Address(0) represents ETH
+    address public token;
+
+    /// @notice The price per message per epoch per period
+    uint256 public pricePerMessagePerPeriod;
+
+    constructor(address _token, uint256 _pricePerPeriod) Ownable() {
+        token = _token;
+        pricePerMessagePerPeriod = _pricePerPeriod;
+    }
+
+    /// Set accepted token and price per message per epoch per period
+    /// @param _token The token accepted by the membership management for RLN
+    /// @param _pricePerPeriod Price per message per epoch
+    function setTokenAndPrice(address _token, uint256 _pricePerPeriod) external onlyOwner {
+        token = _token;
+        pricePerMessagePerPeriod = _pricePerPeriod;
+    }
+
+    /// Returns the token and price to pay in `token` for some `_rateLimit`
+    /// @param _rateLimit the rate limit the user wants to acquire
+    /// @param _numberOfPeriods the number of periods the user wants to acquire
+    /// @return address of the erc20 token
+    /// @return uint price to pay for acquiring the specified `_rateLimit`
+    function calculate(uint256 _rateLimit, uint32 _numberOfPeriods) external view returns (address, uint256) {
+        return (token, uint256(_numberOfPeriods) * uint256(_rateLimit) * pricePerMessagePerPeriod);
+    }
+}