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Gas: 19 Gwei

Contract

0x0f306E3f6b2d5ae820d33C284659B29847972d9A
 

Overview

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Accept Grant196585562024-04-15 4:32:352 hrs ago1713155555IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.002342567.56681774
Accept Grant196582752024-04-15 3:36:112 hrs ago1713152171IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.002359927.66283878
Accept Grant196581342024-04-15 3:07:473 hrs ago1713150467IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.002570258.30179347
Accept Grant196571542024-04-14 23:50:356 hrs ago1713138635IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.002215347.15570747
Accept Grant196551932024-04-14 17:14:1113 hrs ago1713114851IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0036166811.68172511
Accept Grant196538332024-04-14 12:40:2317 hrs ago1713098423IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.00277899.02328956
Accept Grant196534792024-04-14 11:29:1119 hrs ago1713094151IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0036890811.91547919
Accept Grant196470152024-04-13 13:41:4740 hrs ago1713015707IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0043102913.92035752
Accept Grant196458542024-04-13 9:47:3544 hrs ago1713001655IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.002854549.22160397
Accept Grant196448842024-04-13 6:31:352 days ago1712989895IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0033205410.72595484
Accept Grant196444982024-04-13 5:13:352 days ago1712985215IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0034053811
Accept Grant196443942024-04-13 4:52:472 days ago1712983967IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0034058411
Accept Grant196423792024-04-12 22:04:352 days ago1712959475IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0059529519.23001819
Accept Grant196391992024-04-12 11:21:592 days ago1712920919IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0038586412.46414247
Accept Grant196385692024-04-12 9:15:352 days ago1712913335IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0068551522.14198071
Accept Grant196385442024-04-12 9:10:352 days ago1712913035IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0052986317.11432888
Accept Grant196385212024-04-12 9:05:592 days ago1712912759IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0052201316.86187406
Accept Grant196385032024-04-12 9:02:232 days ago1712912543IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0058947919.13956488
Accept Grant196384712024-04-12 8:55:592 days ago1712912159IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0055485617.92241512
Accept Grant196384502024-04-12 8:51:472 days ago1712911907IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0059802319.317017
Accept Grant196384402024-04-12 8:49:472 days ago1712911787IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0057494918.57106793
Accept Grant196382022024-04-12 8:01:592 days ago1712908919IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0064228620.74636893
Accept Grant196381322024-04-12 7:47:592 days ago1712908079IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0058243118.91134068
Accept Grant196380642024-04-12 7:34:232 days ago1712907263IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0066991621.63854137
Accept Grant196380152024-04-12 7:24:232 days ago1712906663IN
Goldfinch Protocol: Merkle Distributor
0 ETH0.0052368217.00379468
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Contract Source Code Verified (Exact Match)

Contract Name:
MerkleDistributor

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 100 runs

Other Settings:
default evmVersion, GNU GPLv3 license
File 1 of 8 : MerkleDistributor.sol
// SPDX-License-Identifier: GPL-3.0-only
// solhint-disable-next-line max-line-length
// Adapted from https://github.com/Uniswap/merkle-distributor/blob/c3255bfa2b684594ecd562cacd7664b0f18330bf/contracts/MerkleDistributor.sol.
pragma solidity 0.6.12;

import "@openzeppelin/contracts/cryptography/MerkleProof.sol";

import "../interfaces/ICommunityRewards.sol";
import "../interfaces/IMerkleDistributor.sol";

contract MerkleDistributor is IMerkleDistributor {
  address public immutable override communityRewards;
  bytes32 public immutable override merkleRoot;

  // @dev This is a packed array of booleans.
  mapping(uint256 => uint256) private acceptedBitMap;

  constructor(address communityRewards_, bytes32 merkleRoot_) public {
    require(communityRewards_ != address(0), "Cannot use the null address");
    require(merkleRoot_ != 0, "Invalid merkle root provided");
    communityRewards = communityRewards_;
    merkleRoot = merkleRoot_;
  }

  function isGrantAccepted(uint256 index) public view override returns (bool) {
    uint256 acceptedWordIndex = index / 256;
    uint256 acceptedBitIndex = index % 256;
    uint256 acceptedWord = acceptedBitMap[acceptedWordIndex];
    uint256 mask = (1 << acceptedBitIndex);
    return acceptedWord & mask == mask;
  }

  function _setGrantAccepted(uint256 index) private {
    uint256 acceptedWordIndex = index / 256;
    uint256 acceptedBitIndex = index % 256;
    acceptedBitMap[acceptedWordIndex] = acceptedBitMap[acceptedWordIndex] | (1 << acceptedBitIndex);
  }

  function acceptGrant(
    uint256 index,
    uint256 amount,
    uint256 vestingLength,
    uint256 cliffLength,
    uint256 vestingInterval,
    bytes32[] calldata merkleProof
  ) external override {
    require(!isGrantAccepted(index), "Grant already accepted");

    // Verify the merkle proof.
    //
    /// @dev Per the Warning in
    /// https://github.com/ethereum/solidity/blob/v0.6.12/docs/abi-spec.rst#non-standard-packed-mode,
    /// it is important that no more than one of the arguments to `abi.encodePacked()` here be a
    /// dynamic type (see definition in
    /// https://github.com/ethereum/solidity/blob/v0.6.12/docs/abi-spec.rst#formal-specification-of-the-encoding).
    bytes32 node = keccak256(abi.encodePacked(index, msg.sender, amount, vestingLength, cliffLength, vestingInterval));
    require(MerkleProof.verify(merkleProof, merkleRoot, node), "Invalid proof");

    // Mark it accepted and perform the granting.
    _setGrantAccepted(index);
    uint256 tokenId = ICommunityRewards(communityRewards).grant(
      msg.sender,
      amount,
      vestingLength,
      cliffLength,
      vestingInterval
    );

    emit GrantAccepted(tokenId, index, msg.sender, amount, vestingLength, cliffLength, vestingInterval);
  }
}

File 2 of 8 : IERC165.sol
pragma solidity ^0.6.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 3 of 8 : IERC20.sol
pragma solidity ^0.6.0;

/**
 * @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);
}

File 4 of 8 : IERC721.sol
pragma solidity ^0.6.2;

import "../../introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of NFTs in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the NFT specified by `tokenId`.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
     * another (`to`).
     *
     *
     *
     * Requirements:
     * - `from`, `to` cannot be zero.
     * - `tokenId` must be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this
     * NFT by either {approve} or {setApprovalForAll}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;
    /**
     * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
     * another (`to`).
     *
     * Requirements:
     * - If the caller is not `from`, it must be approved to move this NFT by
     * either {approve} or {setApprovalForAll}.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;
    function approve(address to, uint256 tokenId) external;
    function getApproved(uint256 tokenId) external view returns (address operator);

    function setApprovalForAll(address operator, bool _approved) external;
    function isApprovedForAll(address owner, address operator) external view returns (bool);


    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

File 5 of 8 : MerkleProof.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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 6 of 8 : ICommunityRewards.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC721/IERC721.sol";

import "../interfaces/IERC20withDec.sol";

interface ICommunityRewards is IERC721 {
  function rewardsToken() external view returns (IERC20withDec);

  function claimableRewards(uint256 tokenId) external view returns (uint256 rewards);

  function totalVestedAt(
    uint256 start,
    uint256 end,
    uint256 granted,
    uint256 cliffLength,
    uint256 vestingInterval,
    uint256 revokedAt,
    uint256 time
  ) external pure returns (uint256 rewards);

  function grant(
    address recipient,
    uint256 amount,
    uint256 vestingLength,
    uint256 cliffLength,
    uint256 vestingInterval
  ) external returns (uint256 tokenId);

  function loadRewards(uint256 rewards) external;

  function revokeGrant(uint256 tokenId) external;

  function getReward(uint256 tokenId) external;

  event RewardAdded(uint256 reward);
  event Granted(
    address indexed user,
    uint256 indexed tokenId,
    uint256 amount,
    uint256 vestingLength,
    uint256 cliffLength,
    uint256 vestingInterval
  );
  event GrantRevoked(uint256 indexed tokenId, uint256 totalUnvested);
  event RewardPaid(address indexed user, uint256 indexed tokenId, uint256 reward);
}

File 7 of 8 : IERC20withDec.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol";

/*
Only addition is the `decimals` function, which we need, and which both our Fidu and USDC use, along with most ERC20's.
*/

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20withDec is IERC20 {
  /**
   * @dev Returns the number of decimals used for the token
   */
  function decimals() external view returns (uint8);
}

File 8 of 8 : IMerkleDistributor.sol
// SPDX-License-Identifier: GPL-3.0-only
// solhint-disable-next-line max-line-length
// Adapted from https://github.com/Uniswap/merkle-distributor/blob/c3255bfa2b684594ecd562cacd7664b0f18330bf/contracts/interfaces/IMerkleDistributor.sol.
pragma solidity 0.6.12;

/// @notice Enables the granting of a CommunityRewards grant, if the grant details exist in this
/// contract's Merkle root.
interface IMerkleDistributor {
  /// @notice Returns the address of the CommunityRewards contract whose grants are distributed by this contract.
  function communityRewards() external view returns (address);

  /// @notice Returns the merkle root of the merkle tree containing grant details available to accept.
  function merkleRoot() external view returns (bytes32);

  /// @notice Returns true if the index has been marked accepted.
  function isGrantAccepted(uint256 index) external view returns (bool);

  /// @notice Causes the sender to accept the grant consisting of the given details. Reverts if
  /// the inputs (which includes who the sender is) are invalid.
  function acceptGrant(
    uint256 index,
    uint256 amount,
    uint256 vestingLength,
    uint256 cliffLength,
    uint256 vestingInterval,
    bytes32[] calldata merkleProof
  ) external;

  /// @notice This event is triggered whenever a call to #acceptGrant succeeds.
  event GrantAccepted(
    uint256 indexed tokenId,
    uint256 indexed index,
    address indexed account,
    uint256 amount,
    uint256 vestingLength,
    uint256 cliffLength,
    uint256 vestingInterval
  );
}

Settings
{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"communityRewards_","type":"address"},{"internalType":"bytes32","name":"merkleRoot_","type":"bytes32"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"index","type":"uint256"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"vestingLength","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"cliffLength","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"vestingInterval","type":"uint256"}],"name":"GrantAccepted","type":"event"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"vestingLength","type":"uint256"},{"internalType":"uint256","name":"cliffLength","type":"uint256"},{"internalType":"uint256","name":"vestingInterval","type":"uint256"},{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"}],"name":"acceptGrant","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"communityRewards","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"isGrantAccepted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"merkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","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)

0000000000000000000000000cd73c18c085deb287257ed2307ec713e9af3460926446af7200bedeab4755e62ef8d73ac9409bde8e84d5e64a4677690cc9d9c5

-----Decoded View---------------
Arg [0] : communityRewards_ (address): 0x0Cd73c18C085dEB287257ED2307eC713e9Af3460
Arg [1] : merkleRoot_ (bytes32): 0x926446af7200bedeab4755e62ef8d73ac9409bde8e84d5e64a4677690cc9d9c5

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000cd73c18c085deb287257ed2307ec713e9af3460
Arg [1] : 926446af7200bedeab4755e62ef8d73ac9409bde8e84d5e64a4677690cc9d9c5


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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.