Merge pull request #13 from Instadapp/fluid-merkle-connector

Add fluid merkle rewards claim connector

contracts/mainnet/connectors/merkleDistributor/events.sol

@@ -0,0 +1,23 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+contract Events {
+    event LogClaim(
+        uint256 cumulativeAmount,
+        address fToken,
+        uint256 cycle,
+        bytes32[] merkleProof,
+        uint256 rewardsClaimed,
+        uint256 setId
+    );
+
+    event LogClaimOnBehalf(
+        address recipient_,
+        uint256 cumulativeAmount,
+        address fToken,
+        uint256 cycle,
+        bytes32[] merkleProof,
+        uint256 rewardsClaimed,
+        uint256 setId
+    );
+}

contracts/mainnet/connectors/merkleDistributor/interface.sol

@@ -0,0 +1,12 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+interface IFluidMerkleDistributor {
+    function claim(
+        address recipient_,
+        uint256 cumulativeAmount_,
+        address fToken_,
+        uint256 cycle_,
+        bytes32[] calldata merkleProof_
+    ) external;
+}

contracts/mainnet/connectors/merkleDistributor/main.sol

@@ -0,0 +1,107 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+import {Basic} from "../../common/basic.sol";
+import {Events} from "./events.sol";
+import {IFluidMerkleDistributor} from "./interface.sol";
+import {TokenInterface} from "../../common/interfaces.sol";
+
+abstract contract FluidMerkle is Basic, Events {
+    IFluidMerkleDistributor internal constant MERKLE_DISTRIBUTOR =
+        IFluidMerkleDistributor(0x1d3D6d38Da24E9Ff3B17693f6971CAe62c3AA1DE);
+
+    TokenInterface internal constant TOKEN =
+        TokenInterface(0x6f40d4A6237C257fff2dB00FA0510DeEECd303eb);
+
+    /**
+     * @dev Claims rewards from Fluid merkle distributor contract
+     * @param cumulativeAmount_ Total reward cumulated since reward inception.
+     * @param fToken_ Address of fToken on which rewards are being distributed.
+     * @param cycle_ Current epoch cycle.
+     * @param merkleProof_ Merkle proof that validates this claim.
+     * @param setId_ Id to set the rewards received.
+     */
+    function claim(
+        uint256 cumulativeAmount_,
+        address fToken_,
+        uint256 cycle_,
+        bytes32[] calldata merkleProof_,
+        uint256 setId_
+    )
+        external
+        payable
+        returns (string memory _eventName, bytes memory _eventParam)
+    {
+        uint256 rewardsBeforeBal_ = TOKEN.balanceOf(address(this));
+
+        MERKLE_DISTRIBUTOR.claim(
+            address(this),
+            cumulativeAmount_,
+            fToken_,
+            cycle_,
+            merkleProof_
+        );
+
+        uint256 rewardsClaimed_ = TOKEN.balanceOf(address(this)) -
+            rewardsBeforeBal_;
+
+        _eventName = "LogClaim(uint256,address,uint256,bytes32[],uint256,uint256)";
+        _eventParam = abi.encode(
+            cumulativeAmount_,
+            fToken_,
+            cycle_,
+            merkleProof_,
+            rewardsClaimed_,
+            setId_
+        );
+    }
+
+    /**
+     * @dev Claims rewards from Fluid merkle distributor contract
+     * @param cumulativeAmount_ Total reward cumulated since reward inception.
+     * @param fToken_ Address of fToken on which rewards are being distributed.
+     * @param cycle_ Current epoch cycle.
+     * @param merkleProof_ Merkle proof that validates this claim.
+     * @param setId_ Id to set the rewards received.
+     */
+    function claimOnBehalf(
+        address recipient_,
+        uint256 cumulativeAmount_,
+        address fToken_,
+        uint256 cycle_,
+        bytes32[] calldata merkleProof_,
+        uint256 setId_
+    )
+        external
+        payable
+        returns (string memory _eventName, bytes memory _eventParam)
+    {
+        uint256 rewardsBeforeBal_ = TOKEN.balanceOf(recipient_);
+
+        MERKLE_DISTRIBUTOR.claim(
+            recipient_,
+            cumulativeAmount_,
+            fToken_,
+            cycle_,
+            merkleProof_
+        );
+
+        uint256 rewardsClaimed_ = TOKEN.balanceOf(recipient_) -
+            rewardsBeforeBal_;
+
+        _eventName = "LogClaimOnBehalf(address,uint256,address,uint256,bytes32[],uint256,uint256)";
+        _eventParam = abi.encode(
+            recipient_,
+            cumulativeAmount_,
+            fToken_,
+            cycle_,
+            merkleProof_,
+            rewardsClaimed_,
+            setId_
+        );
+    }
+}
+
+contract ConnectV2FluidMerkleClaim is FluidMerkle {
+    string public constant name = "Fluid-Merkle-v1.0";
+}