Created
October 26, 2022 18:38
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| // SPDX-License-Identifier: LGPL-3.0-only | |
| pragma solidity ^0.8.6; | |
| import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; | |
| import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"; | |
| import "@openzeppelin/contracts/access/Ownable.sol"; | |
| import "@openzeppelin/contracts/utils/Counters.sol"; | |
| contract Distribute is Ownable { | |
| using Counters for Counters.Counter; | |
| Counters.Counter private _count; | |
| bytes32 public merkleRoot; | |
| address public currency; | |
| address public DAO; | |
| uint256 public round; | |
| struct member { | |
| uint256 amt; | |
| uint256 round; | |
| } | |
| mapping(address => member) public claimed; | |
| constructor( | |
| address _currency, | |
| bytes32 _initRoot, | |
| address _dao | |
| ) { | |
| _transferOwnership(_dao); | |
| merkleRoot = _initRoot; | |
| currency = _currency; | |
| DAO = _dao; | |
| } | |
| function updateCurrency(address _newCurrency) public onlyOwner { | |
| currency = _newCurrency; | |
| } | |
| function updateDAO(address _newDAO) public onlyOwner { | |
| DAO = _newDAO; | |
| } | |
| // every new issuance of currancy, a new root can be provided | |
| function updateRoot(bytes32 _root) public onlyOwner { | |
| merkleRoot = _root; | |
| round++; | |
| } | |
| function claim(uint256 _amt, bytes32[] calldata merkleProof) public { | |
| require(_claimConditions(), "claim condition not met"); | |
| require(claimed[msg.sender].round <= round, "must not have claimed for this round"); | |
| claimed[msg.sender].amt += _amt; | |
| claimed[msg.sender].round = round + 1; | |
| bytes32 leaf = keccak256(abi.encodePacked(msg.sender, _amt)); | |
| require(MerkleProof.verify(merkleProof, merkleRoot, leaf) == true, "invalid merkle proof"); | |
| IERC20(currency).transferFrom(address(this), msg.sender, _amt); | |
| } | |
| function _claimConditions() internal returns (bool){ | |
| // create you're own additional conditions, e.g. NFT membership | |
| return true; | |
| } | |
| } |
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