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0x1E906a88F8F7fEf31Af96e1ea53718970fE36e96
 

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0x3a9869d4f20ccd9a380cb3e2fbac918cc767ebf1366f7e91ed6ca4094147814b Claim Tokens(pending)2024-08-19 5:54:3110 days ago1724046871IN
0x1E906a88...70fE36e96
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0xe4f71029222c8ac06ea477bc16c4a408b0682bdb432139ed7d85e016e3a7da83 Claim Tokens(pending)2024-08-19 5:40:2010 days ago1724046020IN
0x1E906a88...70fE36e96
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0x0ad150fb89926f77f0d78754191dc92a63c58f50b8fd60c81296142f14282c65 Claim Tokens(pending)2024-08-18 6:56:2111 days ago1723964181IN
0x1E906a88...70fE36e96
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0x1E906a88...70fE36e96
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0xce06af3522d5e4a7e47707287e0df40685fc044459750b2466a69572cab40490 Claim Tokens(pending)2024-08-18 6:46:0111 days ago1723963561IN
0x1E906a88...70fE36e96
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0xdc34d225a6e9f226138de98f3143f5dfc45d1dcbe59c998e304d656c49e2a2a3 Claim Tokens(pending)2024-08-18 2:27:5012 days ago1723948070IN
0x1E906a88...70fE36e96
0 ETH(Pending)(Pending)
0xebb146845e2647050821b93a9eb93a8c461b0e90c2a43b1833f0f08de4c5c8a4 Claim Tokens(pending)2024-08-18 1:56:0312 days ago1723946163IN
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Claim Tokens204534272024-08-04 6:34:4725 days ago1722753287IN
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0 ETH0.000044691
Claim Tokens204533932024-08-04 6:27:5925 days ago1722752879IN
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0 ETH0.000044691
Claim Tokens198217062024-05-08 0:16:35114 days ago1715127395IN
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0 ETH0.000146893.37349239
Claim Tokens198002402024-05-05 0:12:23117 days ago1714867943IN
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0 ETH0.00016253.6962477
Claim Tokens196643742024-04-16 0:07:23136 days ago1713226043IN
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0 ETH0.000290786.67615683
Claim Tokens191746752024-02-07 6:57:23204 days ago1707289043IN
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0 ETH0.0012708728.40331745
Claim Tokens190668542024-01-23 3:58:11220 days ago1705982291IN
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0 ETH0.000324157.34311143
Claim Tokens189110182024-01-01 7:10:11241 days ago1704093011IN
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0 ETH0.000358048
Claim Tokens189109542024-01-01 6:57:11241 days ago1704092231IN
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0 ETH0.000373528.46617341
Claim Tokens189109542024-01-01 6:57:11241 days ago1704092231IN
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0 ETH0.000371638.42335082
Claim Tokens189109542024-01-01 6:57:11241 days ago1704092231IN
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0 ETH0.000371638.42335082
Claim Tokens189093062024-01-01 1:23:47242 days ago1704072227IN
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0 ETH0.000402589
Claim Tokens189031232023-12-31 4:36:11243 days ago1703997371IN
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0 ETH0.0004472510.00112036
Claim Tokens188667392023-12-26 1:56:59248 days ago1703555819IN
0x1E906a88...70fE36e96
0 ETH0.0004504210.34414225
Claim Tokens188666902023-12-26 1:47:11248 days ago1703555231IN
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0 ETH0.0004728510.86214359
Claim Tokens188601142023-12-25 3:35:23249 days ago1703475323IN
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0 ETH0.0005518712.67405148
Claim Tokens188450702023-12-23 0:52:59251 days ago1703292779IN
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0 ETH0.0005925220.17878728
Claim Tokens188255612023-12-20 7:13:47253 days ago1703056427IN
0x1E906a88...70fE36e96
0 ETH0.0041728942.19814671
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204534272024-08-04 6:34:4725 days ago1722753287
0x1E906a88...70fE36e96
0 ETH
204533932024-08-04 6:27:5925 days ago1722752879
0x1E906a88...70fE36e96
0 ETH
198217062024-05-08 0:16:35114 days ago1715127395
0x1E906a88...70fE36e96
0 ETH
198002402024-05-05 0:12:23117 days ago1714867943
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0 ETH
196643742024-04-16 0:07:23136 days ago1713226043
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0 ETH
191746752024-02-07 6:57:23204 days ago1707289043
0x1E906a88...70fE36e96
0 ETH
190668542024-01-23 3:58:11220 days ago1705982291
0x1E906a88...70fE36e96
0 ETH
189110182024-01-01 7:10:11241 days ago1704093011
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0 ETH
189109542024-01-01 6:57:11241 days ago1704092231
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0 ETH
189109542024-01-01 6:57:11241 days ago1704092231
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0 ETH
189109542024-01-01 6:57:11241 days ago1704092231
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0 ETH
189093062024-01-01 1:23:47242 days ago1704072227
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0 ETH
189031232023-12-31 4:36:11243 days ago1703997371
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0 ETH
188667392023-12-26 1:56:59248 days ago1703555819
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0 ETH
188666902023-12-26 1:47:11248 days ago1703555231
0x1E906a88...70fE36e96
0 ETH
188601142023-12-25 3:35:23249 days ago1703475323
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188255612023-12-20 7:13:47253 days ago1703056427
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188255612023-12-20 7:13:47253 days ago1703056427
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188239322023-12-20 1:43:35254 days ago1703036615
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188239322023-12-20 1:43:35254 days ago1703036615
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188221852023-12-19 19:50:59254 days ago1703015459
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188221852023-12-19 19:50:59254 days ago1703015459
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188202622023-12-19 13:22:23254 days ago1702992143
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188202622023-12-19 13:22:23254 days ago1702992143
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188202482023-12-19 13:19:23254 days ago1702991963
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Contract Source Code Verified (Exact Match)

Contract Name:
TipClaims

Compiler Version
v0.8.6+commit.11564f7e

Optimization Enabled:
Yes with 1000 runs

Other Settings:
default evmVersion
File 1 of 4 : TipClaims.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";

interface IERC20 {
    function totalSupply() external view returns (uint);

    function balanceOf(address account) external view returns (uint);

    function transfer(address recipient, uint amount) external returns (bool);

    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint amount) external returns (bool);

    function transferFrom(
        address sender,
        address recipient,
        uint amount
    ) external returns (bool);
}

contract TipClaims is Ownable {
    IERC20 private token;

    struct EpochClaim {
        uint claimStart;
        uint claimEnd;
        bytes32 merkleRoot;
        uint claimableTokens;
        mapping(address => bool) userClaimed;
    }

    mapping(uint => EpochClaim) public EpochClaims;

    constructor(address tokenAddress) {
        token = IERC20(tokenAddress);
    }

    function hasUserClaimed(uint _claimIndex, address _user) public view returns (bool) {
        return EpochClaims[_claimIndex].userClaimed[_user];
    }

    function getEpochClaim(uint _claimIndex)
        public
        view
        returns (
            uint claimStart,
            uint claimEnd,
            bytes32 merkleRoot,
            uint claimableTokens
        )
    {
        EpochClaim storage claim = EpochClaims[_claimIndex];
        return (claim.claimStart, claim.claimEnd, claim.merkleRoot, claim.claimableTokens);
    }

    function checkProof(
        bytes32[] memory _proof,
        uint _tokens,
        bytes32 root
    ) internal view returns (bool) {
        bytes32 leaf = keccak256(abi.encodePacked(msg.sender, _tokens));
        return MerkleProof.verify(_proof, root, leaf);
    }

    function setEpochClaim(
        uint _epochIndex,
        uint _claimStart,
        uint _claimEnd,
        bytes32 _merkleRoot,
        uint _claimableTokens
    ) external onlyOwner {
        EpochClaim storage newEpochClaim = EpochClaims[_epochIndex];

        newEpochClaim.claimStart = _claimStart;
        newEpochClaim.claimEnd = _claimEnd;
        newEpochClaim.merkleRoot = _merkleRoot;
        newEpochClaim.claimableTokens = _claimableTokens;
    }

    function claimTokens(
        uint _epochIndex,
        uint _tokens,
        bytes32[] memory _proof
    ) external {
        require(token.balanceOf(address(this)) >= _tokens, "Contract tokens depleted");
        require(EpochClaims[_epochIndex].claimStart < block.timestamp, "Claim has not started");
        require(EpochClaims[_epochIndex].claimEnd > block.timestamp, "Claim has ended");
        require(!EpochClaims[_epochIndex].userClaimed[msg.sender], "User has already claimed");
        require(checkProof(_proof, _tokens, EpochClaims[_epochIndex].merkleRoot), "Invalid proof");
        EpochClaims[_epochIndex].userClaimed[msg.sender] = true;
        EpochClaims[_epochIndex].claimableTokens -= _tokens;
        token.transfer(msg.sender, _tokens);
    }

    function manualRemove () external onlyOwner {
        token.transfer(msg.sender, token.balanceOf(address(this)));
    }
}

File 2 of 4 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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);
    }
}

File 3 of 4 : Context.sol
// 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;
    }
}

File 4 of 4 : MerkleProof.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.2) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The tree and the proofs can be generated using our
 * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
 * You will find a quickstart guide in the readme.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 * OpenZeppelin's JavaScript library generates merkle trees that are safe
 * against this attack out of the box.
 */
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) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     *
     * _Available since v4.7._
     */
    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     *
     * _Available since v4.7._
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * CAUTION: Not all merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * _Available since v4.7._
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofLen = proof.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proofLen - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            require(proofPos == proofLen, "MerkleProof: invalid multiproof");
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _Available since v4.7._
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofLen = proof.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proofLen - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            require(proofPos == proofLen, "MerkleProof: invalid multiproof");
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    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) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"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":"uint256","name":"","type":"uint256"}],"name":"EpochClaims","outputs":[{"internalType":"uint256","name":"claimStart","type":"uint256"},{"internalType":"uint256","name":"claimEnd","type":"uint256"},{"internalType":"bytes32","name":"merkleRoot","type":"bytes32"},{"internalType":"uint256","name":"claimableTokens","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_epochIndex","type":"uint256"},{"internalType":"uint256","name":"_tokens","type":"uint256"},{"internalType":"bytes32[]","name":"_proof","type":"bytes32[]"}],"name":"claimTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_claimIndex","type":"uint256"}],"name":"getEpochClaim","outputs":[{"internalType":"uint256","name":"claimStart","type":"uint256"},{"internalType":"uint256","name":"claimEnd","type":"uint256"},{"internalType":"bytes32","name":"merkleRoot","type":"bytes32"},{"internalType":"uint256","name":"claimableTokens","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_claimIndex","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"hasUserClaimed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"manualRemove","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_epochIndex","type":"uint256"},{"internalType":"uint256","name":"_claimStart","type":"uint256"},{"internalType":"uint256","name":"_claimEnd","type":"uint256"},{"internalType":"bytes32","name":"_merkleRoot","type":"bytes32"},{"internalType":"uint256","name":"_claimableTokens","type":"uint256"}],"name":"setEpochClaim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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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)

0000000000000000000000000176b898e92e814c06cc379e508ceb571f70bd40

-----Decoded View---------------
Arg [0] : tokenAddress (address): 0x0176b898E92e814c06Cc379E508CEB571F70bD40

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000176b898e92e814c06cc379e508ceb571f70bd40


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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.