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ContractCreator
Latest 25 from a total of 903 transactions
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Claim | 16310025 | 704 days ago | IN | 0 ETH | 0.001091 | ||||
Claim | 16112524 | 731 days ago | IN | 0 ETH | 0.00122583 | ||||
Claim | 15917267 | 759 days ago | IN | 0 ETH | 0.0006672 | ||||
Claim | 15774177 | 779 days ago | IN | 0 ETH | 0.00192635 | ||||
Claim | 15738770 | 784 days ago | IN | 0 ETH | 0.00045066 | ||||
Claim | 15738770 | 784 days ago | IN | 0 ETH | 0.0009672 | ||||
Claim | 15283126 | 852 days ago | IN | 0 ETH | 0.00119023 | ||||
Claim | 15068408 | 886 days ago | IN | 0 ETH | 0.00072728 | ||||
Claim | 14548590 | 971 days ago | IN | 0 ETH | 0.00417726 | ||||
Claim | 13879726 | 1075 days ago | IN | 0 ETH | 0.00392152 | ||||
Claim | 13874634 | 1075 days ago | IN | 0 ETH | 0.00524323 | ||||
Claim | 13732313 | 1098 days ago | IN | 0 ETH | 0.00498023 | ||||
Claim | 13635272 | 1113 days ago | IN | 0 ETH | 0.0088596 | ||||
Claim | 13475821 | 1138 days ago | IN | 0 ETH | 0.00470439 | ||||
Claim | 13473556 | 1139 days ago | IN | 0 ETH | 0.00419444 | ||||
Claim | 13397944 | 1150 days ago | IN | 0 ETH | 0.00886978 | ||||
Claim | 13353941 | 1157 days ago | IN | 0 ETH | 0.00850039 | ||||
Claim | 13253139 | 1173 days ago | IN | 0 ETH | 0.00374514 | ||||
Claim | 13223454 | 1178 days ago | IN | 0 ETH | 0.00313154 | ||||
Claim | 13197952 | 1182 days ago | IN | 0 ETH | 0.00548599 | ||||
Claim | 13193714 | 1182 days ago | IN | 0 ETH | 0.00950531 | ||||
Claim | 13193699 | 1182 days ago | IN | 0 ETH | 0.00972473 | ||||
Claim | 13191052 | 1183 days ago | IN | 0 ETH | 0.00621699 | ||||
Claim | 13171664 | 1186 days ago | IN | 0 ETH | 0.00782494 | ||||
Claim | 13143930 | 1190 days ago | IN | 0 ETH | 0.00455009 |
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Contract Name:
MerkleDistributor
Compiler Version
v0.7.4+commit.3f05b770
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2021-05-31 */ // SPDX-License-Identifier: UNLICENSED pragma solidity 0.7.4; // Part: IMerkleDistributor // Allows anyone to claim a token if they exist in a merkle root. interface IMerkleDistributor { // Returns the address of the token distributed by this contract. function token() external view returns (address); // Returns the merkle root of the merkle tree containing account balances available to claim. function merkleRoot() external view returns (bytes32); // Returns true if the index has been marked claimed. function isClaimed(uint256 index) external view returns (bool); // Claim the given amount of the token to the given address. Reverts if the inputs are invalid. function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external; // This event is triggered whenever a call to #claim succeeds. event Claimed(uint256 index, address account, uint256 amount); } // Part: OpenZeppelin/[email protected]/IERC20 /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // Part: OpenZeppelin/[email protected]/MerkleProof /** * @dev These functions deal with verification of Merkle trees (hash trees), */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = keccak256(abi.encodePacked(computedHash, proofElement)); } else { // Hash(current element of the proof + current computed hash) computedHash = keccak256(abi.encodePacked(proofElement, computedHash)); } } // Check if the computed hash (root) is equal to the provided root return computedHash == root; } } // File: MerkleDistributor.sol contract MerkleDistributor is IMerkleDistributor { address public immutable override token; bytes32 public immutable override merkleRoot; // This is a packed array of booleans. mapping(uint256 => uint256) private claimedBitMap; constructor(address token_, bytes32 merkleRoot_) public { token = token_; merkleRoot = merkleRoot_; } function isClaimed(uint256 index) public view override returns (bool) { uint256 claimedWordIndex = index / 256; uint256 claimedBitIndex = index % 256; uint256 claimedWord = claimedBitMap[claimedWordIndex]; uint256 mask = (1 << claimedBitIndex); return claimedWord & mask == mask; } function _setClaimed(uint256 index) private { uint256 claimedWordIndex = index / 256; uint256 claimedBitIndex = index % 256; claimedBitMap[claimedWordIndex] = claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex); } function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external override { require(!isClaimed(index), 'MerkleDistributor: Drop already claimed.'); // Verify the merkle proof. bytes32 node = keccak256(abi.encodePacked(index, account, amount)); require(MerkleProof.verify(merkleProof, merkleRoot, node), 'MerkleDistributor: Invalid proof.'); // Mark it claimed and send the token. _setClaimed(index); require(IERC20(token).transfer(account, amount), 'MerkleDistributor: Transfer failed.'); emit Claimed(index, account, amount); } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"token_","type":"address"},{"internalType":"bytes32","name":"merkleRoot_","type":"bytes32"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"index","type":"uint256"},{"indexed":false,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claimed","type":"event"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"},{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"isClaimed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"merkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
60c060405234801561001057600080fd5b506040516106123803806106128339818101604052604081101561003357600080fd5b508051602090910151606082901b6001600160601b03191660805260a08190526001600160a01b039091169061058c6100866000398061020f52806103ae52508061028052806103f8525061058c6000f3fe608060405234801561001057600080fd5b506004361061004c5760003560e01c80632e7ba6ef146100515780632eb4a7ab146100df5780639e34070f146100f9578063fc0c546a1461012a575b600080fd5b6100dd6004803603608081101561006757600080fd5b8135916001600160a01b03602082013516916040820135919081019060808101606082013564010000000081111561009e57600080fd5b8201836020820111156100b057600080fd5b803590602001918460208302840111640100000000831117156100d257600080fd5b50909250905061014e565b005b6100e76103ac565b60408051918252519081900360200190f35b6101166004803603602081101561010f57600080fd5b50356103d0565b604080519115158252519081900360200190f35b6101326103f6565b604080516001600160a01b039092168252519081900360200190f35b610157856103d0565b156101935760405162461bcd60e51b81526004018080602001828103825260288152602001806104eb6028913960400191505060405180910390fd5b600085858560405160200180848152602001836001600160a01b031660601b8152601401828152602001935050505060405160208183030381529060405280519060200120905061023a8383808060200260200160405190810160405280939291908181526020018383602002808284376000920191909152507f0000000000000000000000000000000000000000000000000000000000000000925085915061041a9050565b6102755760405162461bcd60e51b81526004018080602001828103825260218152602001806105136021913960400191505060405180910390fd5b61027e866104c3565b7f00000000000000000000000000000000000000000000000000000000000000006001600160a01b031663a9059cbb86866040518363ffffffff1660e01b815260040180836001600160a01b0316815260200182815260200192505050602060405180830381600087803b1580156102f557600080fd5b505af1158015610309573d6000803e3d6000fd5b505050506040513d602081101561031f57600080fd5b505161035c5760405162461bcd60e51b81526004018080602001828103825260238152602001806105346023913960400191505060405180910390fd5b604080518781526001600160a01b038716602082015280820186905290517f4ec90e965519d92681267467f775ada5bd214aa92c0dc93d90a5e880ce9ed0269181900360600190a1505050505050565b7f000000000000000000000000000000000000000000000000000000000000000081565b6101008104600090815260208190526040902054600160ff9092169190911b9081161490565b7f000000000000000000000000000000000000000000000000000000000000000081565b600081815b85518110156104b857600086828151811061043657fe5b6020026020010151905080831161047d57828160405160200180838152602001828152602001925050506040516020818303038152906040528051906020012092506104af565b808360405160200180838152602001828152602001925050506040516020818303038152906040528051906020012092505b5060010161041f565b509092149392505050565b610100810460009081526020819052604090208054600160ff9093169290921b909117905556fe4d65726b6c654469737472696275746f723a2044726f7020616c726561647920636c61696d65642e4d65726b6c654469737472696275746f723a20496e76616c69642070726f6f662e4d65726b6c654469737472696275746f723a205472616e73666572206661696c65642ea2646970667358221220b6aefc66f9623d0d0abf56ea904995cf7716c56f3863d885b44bd9b7b4ce707464736f6c63430007040033000000000000000000000000dada00a9c23390112d08a1377cc59f7d03d9df552ab2ae4f54cf47d5e0376e9fd4deb47e6fcaa926fec6673c91d0da7caf1fda80
Deployed Bytecode
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
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000dada00a9c23390112d08a1377cc59f7d03d9df552ab2ae4f54cf47d5e0376e9fd4deb47e6fcaa926fec6673c91d0da7caf1fda80
-----Decoded View---------------
Arg [0] : token_ (address): 0xDADA00A9C23390112D08a1377cc59f7d03D9df55
Arg [1] : merkleRoot_ (bytes32): 0x2ab2ae4f54cf47d5e0376e9fd4deb47e6fcaa926fec6673c91d0da7caf1fda80
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000dada00a9c23390112d08a1377cc59f7d03d9df55
Arg [1] : 2ab2ae4f54cf47d5e0376e9fd4deb47e6fcaa926fec6673c91d0da7caf1fda80
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