Overview
ETH Balance
0 ETH
Eth Value
$0.00Token Holdings
More Info
Private Name Tags
ContractCreator
Latest 25 from a total of 125,324 transactions
Transaction Hash |
Method
|
Block
|
From
|
To
|
|||||
---|---|---|---|---|---|---|---|---|---|
Claim | 20200615 | 176 days ago | IN | 0 ETH | 0.00012971 | ||||
Claim | 20149629 | 183 days ago | IN | 0 ETH | 0.00017118 | ||||
Claim | 20100803 | 190 days ago | IN | 0 ETH | 0.00016951 | ||||
Claim | 19312212 | 300 days ago | IN | 0 ETH | 0.00288513 | ||||
Claim | 18779492 | 375 days ago | IN | 0 ETH | 0.00246894 | ||||
Claim | 18779415 | 375 days ago | IN | 0 ETH | 0.00376655 | ||||
Claim | 18779403 | 375 days ago | IN | 0 ETH | 0.00350974 | ||||
Claim | 18779396 | 375 days ago | IN | 0 ETH | 0.0020094 | ||||
Claim | 18619477 | 397 days ago | IN | 0 ETH | 0.00121214 | ||||
Claim | 18046255 | 478 days ago | IN | 0 ETH | 0.00076033 | ||||
Claim | 17648162 | 533 days ago | IN | 0 ETH | 0.00062568 | ||||
Claim | 17452237 | 561 days ago | IN | 0 ETH | 0.0011537 | ||||
Claim | 17391813 | 569 days ago | IN | 0 ETH | 0.00235133 | ||||
Claim | 17145615 | 604 days ago | IN | 0 ETH | 0.00278154 | ||||
Claim | 17119913 | 608 days ago | IN | 0 ETH | 0.00264271 | ||||
Claim | 17110415 | 609 days ago | IN | 0 ETH | 0.00474014 | ||||
Claim | 17110397 | 609 days ago | IN | 0 ETH | 0.00548056 | ||||
Claim | 17109308 | 609 days ago | IN | 0 ETH | 0.00381729 | ||||
Claim | 17109010 | 609 days ago | IN | 0 ETH | 0.00441079 | ||||
Claim | 17108515 | 609 days ago | IN | 0 ETH | 0.00426801 | ||||
Claim | 17108394 | 609 days ago | IN | 0 ETH | 0.0040839 | ||||
Claim | 17108240 | 609 days ago | IN | 0 ETH | 0.00409048 | ||||
Claim | 17107549 | 609 days ago | IN | 0 ETH | 0.00415214 | ||||
Claim | 17107288 | 610 days ago | IN | 0 ETH | 0.00108367 | ||||
Claim | 17107288 | 610 days ago | IN | 0 ETH | 0.00339917 |
Latest 1 internal transaction
Advanced mode:
Parent Transaction Hash | Block |
From
|
To
|
|||
---|---|---|---|---|---|---|
16665082 | 672 days ago | 0.01336914 ETH |
Loading...
Loading
This contract may be a proxy contract. Click on More Options and select Is this a proxy? to confirm and enable the "Read as Proxy" & "Write as Proxy" tabs.
Contract Name:
BlurAirdrop
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.17; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "./MerkleVerifier.sol"; contract BlurAirdrop is Ownable { uint256 public reclaimPeriod; address public token; bytes32 public merkleRoot; mapping(bytes32 => bool) public claimed; event Claimed(address account, uint256 amount); constructor(address _token, bytes32 _merkleRoot, uint256 reclaimDelay) { token = _token; merkleRoot = _merkleRoot; reclaimPeriod = block.timestamp + reclaimDelay; } function setMerkleRoot(bytes32 _merkleRoot) external onlyOwner { merkleRoot = _merkleRoot; } function claim( address account, uint256 amount, bytes32[] memory proof ) external { bytes32 leaf = keccak256(abi.encodePacked(account, amount)); require(!claimed[leaf], "Airdrop already claimed"); MerkleVerifier._verifyProof(leaf, merkleRoot, proof); claimed[leaf] = true; require(IERC20(token).transfer(account, amount), "Transfer failed"); emit Claimed(account, amount); } function reclaim(uint256 amount) external onlyOwner { require(block.timestamp > reclaimPeriod, "Tokens cannot be reclaimed"); require(IERC20(token).transfer(msg.sender, amount), "Transfer failed"); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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); /** * @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 `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; /** * @title MerkleVerifier * @dev Utility functions for Merkle tree computations */ library MerkleVerifier { error InvalidProof(); /** * @dev Verify the merkle proof * @param leaf leaf * @param root root * @param proof proof */ function _verifyProof( bytes32 leaf, bytes32 root, bytes32[] memory proof ) public pure { bytes32 computedRoot = _computeRoot(leaf, proof); if (computedRoot != root) { revert InvalidProof(); } } /** * @dev Compute the merkle root * @param leaf leaf * @param proof proof */ function _computeRoot( bytes32 leaf, bytes32[] memory proof ) public pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; computedHash = _hashPair(computedHash, proofElement); } return computedHash; } function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) { return a < b ? _efficientHash(a, b) : _efficientHash(b, a); } function _efficientHash( bytes32 a, bytes32 b ) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": { "contracts/MerkleVerifier.sol": { "MerkleVerifier": "0x4c2bbdbeccae1c492c681158a46eae498a05627b" } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"bytes32","name":"_merkleRoot","type":"bytes32"},{"internalType":"uint256","name":"reclaimDelay","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"claimed","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":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"reclaim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reclaimPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_merkleRoot","type":"bytes32"}],"name":"setMerkleRoot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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
Deployed Bytecode
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
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000005283d291dbcf85356a21ba090e6db59121208b4445b3a9eddc056a4fce210052e3c334cf348c64d399a5acaca0a2bec9ce9cbad500000000000000000000000000000000000000000000000000000000004f1a00
-----Decoded View---------------
Arg [0] : _token (address): 0x5283D291DBCF85356A21bA090E6db59121208b44
Arg [1] : _merkleRoot (bytes32): 0x45b3a9eddc056a4fce210052e3c334cf348c64d399a5acaca0a2bec9ce9cbad5
Arg [2] : reclaimDelay (uint256): 5184000
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000005283d291dbcf85356a21ba090e6db59121208b44
Arg [1] : 45b3a9eddc056a4fce210052e3c334cf348c64d399a5acaca0a2bec9ce9cbad5
Arg [2] : 00000000000000000000000000000000000000000000000000000000004f1a00
Loading...
Loading
Loading...
Loading
Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
POL | 100.00% | $0.471131 | 3.0326 | $1.43 |
Loading...
Loading
[ Download: CSV Export ]
[ Download: CSV Export ]
A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.