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Latest 25 from a total of 305 transactions
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Toggle Friendshi... | 16244584 | 582 days ago | IN | 0 ETH | 0.00040443 | ||||
Mint Friendship ... | 16243759 | 582 days ago | IN | 0.02 ETH | 0.00486685 | ||||
Mint Friendship ... | 16243748 | 582 days ago | IN | 0.02 ETH | 0.0044874 | ||||
Mint Friendship ... | 16242077 | 582 days ago | IN | 0.02 ETH | 0.00610851 | ||||
Mint Friendship ... | 16241791 | 582 days ago | IN | 0.02 ETH | 0.00656803 | ||||
Mint Friendship ... | 16239167 | 583 days ago | IN | 0.02 ETH | 0.00457857 | ||||
Mint Friendship ... | 16239150 | 583 days ago | IN | 0.02 ETH | 0.00413591 | ||||
Mint Friendship ... | 16238927 | 583 days ago | IN | 0.02 ETH | 0.0048644 | ||||
Mint Friendship ... | 16238435 | 583 days ago | IN | 0.02 ETH | 0.00437014 | ||||
Mint Friendship ... | 16238434 | 583 days ago | IN | 0.02 ETH | 0.0047683 | ||||
Mint Friendship ... | 16238425 | 583 days ago | IN | 0.02 ETH | 0.00461525 | ||||
Mint Friendship ... | 16238209 | 583 days ago | IN | 0.02 ETH | 0.00423275 | ||||
Mint Friendship ... | 16238206 | 583 days ago | IN | 0.02 ETH | 0.0046594 | ||||
Mint Friendship ... | 16237961 | 583 days ago | IN | 0.02 ETH | 0.00538454 | ||||
Mint Friendship ... | 16237870 | 583 days ago | IN | 0.02 ETH | 0.00499121 | ||||
Mint Friendship ... | 16237176 | 583 days ago | IN | 0.02 ETH | 0.00428685 | ||||
Mint Friendship ... | 16237159 | 583 days ago | IN | 0.02 ETH | 0.00467383 | ||||
Mint Friendship ... | 16237154 | 583 days ago | IN | 0.02 ETH | 0.004427 | ||||
Mint Friendship ... | 16237106 | 583 days ago | IN | 0.02 ETH | 0.00485593 | ||||
Mint Friendship ... | 16236296 | 583 days ago | IN | 0.02 ETH | 0.00492181 | ||||
Mint Friendship ... | 16236230 | 583 days ago | IN | 0.02 ETH | 0.00562203 | ||||
Mint Friendship ... | 16235921 | 583 days ago | IN | 0.02 ETH | 0.0050462 | ||||
Mint Friendship ... | 16234635 | 583 days ago | IN | 0.02 ETH | 0.00630607 | ||||
Mint Friendship ... | 16234260 | 583 days ago | IN | 0.02 ETH | 0.00782652 | ||||
Mint Friendship ... | 16233571 | 583 days ago | IN | 0.02 ETH | 0.00574964 |
Latest 25 internal transactions (View All)
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16243759 | 582 days ago | 0.02 ETH | ||||
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16242077 | 582 days ago | 0.02 ETH | ||||
16241791 | 582 days ago | 0.02 ETH | ||||
16239167 | 583 days ago | 0.02 ETH | ||||
16239150 | 583 days ago | 0.02 ETH | ||||
16238927 | 583 days ago | 0.02 ETH | ||||
16238435 | 583 days ago | 0.02 ETH | ||||
16238434 | 583 days ago | 0.02 ETH | ||||
16238425 | 583 days ago | 0.02 ETH | ||||
16238209 | 583 days ago | 0.02 ETH | ||||
16238206 | 583 days ago | 0.02 ETH | ||||
16237961 | 583 days ago | 0.02 ETH | ||||
16237870 | 583 days ago | 0.02 ETH | ||||
16237176 | 583 days ago | 0.02 ETH | ||||
16237159 | 583 days ago | 0.02 ETH | ||||
16237154 | 583 days ago | 0.02 ETH | ||||
16237106 | 583 days ago | 0.02 ETH | ||||
16236296 | 583 days ago | 0.02 ETH | ||||
16236230 | 583 days ago | 0.02 ETH | ||||
16235921 | 583 days ago | 0.02 ETH | ||||
16234635 | 583 days ago | 0.02 ETH | ||||
16234260 | 583 days ago | 0.02 ETH | ||||
16233571 | 583 days ago | 0.02 ETH | ||||
16233450 | 583 days ago | 0.02 ETH |
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Contract Name:
FriendshipDecagon
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.17; error FriendshipAlreadyExists(); error FriendshipMintingDisabled(); error NotEnoughEth(); error TransferFailed(); error AddressNotSet(); error CannotMintFriendshipWithSelf(); import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; interface IPassport { function mintPassport(address to) external returns (uint256); } interface ITokenHashes { function storeTokenHash(uint256 tokenId) external; } interface IColourHashes { function storeColourHash(uint256 tokenId, bytes32 colourHash) external; } contract FriendshipDecagon is AccessControl, ReentrancyGuard { event FriendshipMintToggled(); event OneMintPerFriendshipToggled(); event TokenHashesSet(address indexed newTokenHashes); event FriendshipFeeSet(uint256 indexed newFee); event TreasuryAddressSet(address indexed newTreasuryAddress); event ColourHashesSet(address indexed newIColourHashesAddress); event FriendshipMinted( address friend1, uint256 indexed tokenId1, address friend2, uint256 indexed tokenId2, bytes32 indexed colourHash ); uint256 public fee; address payable public treasury; IPassport public decagon; ITokenHashes public tokenHashes; IColourHashes public colourHashes; bool public friendshipMintEnabled; bool public oneMintPerFriendship; mapping(bytes32 => bool) public minted; constructor( uint256 _fee, address payable _treasuryAddress, address _decagonAddress, address _tokenHashesAddress, address _colourHashesAddress ) { if ( _treasuryAddress == address(0) || _decagonAddress == address(0) || _tokenHashesAddress == address(0) || _colourHashesAddress == address(0) ) revert AddressNotSet(); _grantRole(DEFAULT_ADMIN_ROLE, msg.sender); fee = _fee; treasury = _treasuryAddress; decagon = IPassport(_decagonAddress); tokenHashes = ITokenHashes(_tokenHashesAddress); colourHashes = IColourHashes(_colourHashesAddress); friendshipMintEnabled = false; oneMintPerFriendship = true; } function generateFriendshipHash(address _address1, address _address2) public pure returns (bytes32 friendshipHash) { if (_address1 < _address2) { friendshipHash = keccak256(abi.encodePacked(_address1, _address2)); } else { friendshipHash = keccak256(abi.encodePacked(_address2, _address1)); } } function generateColourHash( address _address1, uint256 _tokenId1, address _address2, uint256 _tokenId2 ) public pure returns (bytes32 colourHash) { if ((_address1 < _address2) && (_tokenId1 < _tokenId2)) { colourHash = keccak256( abi.encodePacked(_address1, _tokenId1, _address2, _tokenId2) ); } if ((_address1 < _address2) && (_tokenId2 < _tokenId1)) { colourHash = keccak256( abi.encodePacked(_address1, _tokenId2, _address2, _tokenId1) ); } if ((_address2 < _address1) && (_tokenId1 < _tokenId2)) { colourHash = keccak256( abi.encodePacked(_address2, _tokenId1, _address1, _tokenId2) ); } if ((_address2 < _address1) && (_tokenId2 < _tokenId1)) { colourHash = keccak256( abi.encodePacked(_address2, _tokenId2, _address1, _tokenId1) ); } } function toggleFriendshipMint() external onlyRole(DEFAULT_ADMIN_ROLE) { friendshipMintEnabled = !friendshipMintEnabled; emit FriendshipMintToggled(); } function toggleOneMintPerFriendship() external onlyRole(DEFAULT_ADMIN_ROLE) { oneMintPerFriendship = !oneMintPerFriendship; emit OneMintPerFriendshipToggled(); } function setFee(uint256 _newFee) external onlyRole(DEFAULT_ADMIN_ROLE) { fee = _newFee; emit FriendshipFeeSet(_newFee); } function setTokenHashes(address _newTokenHashesAddress) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_newTokenHashesAddress == address(0)) revert AddressNotSet(); tokenHashes = ITokenHashes(_newTokenHashesAddress); emit TokenHashesSet(_newTokenHashesAddress); } function setColourHashes(address _newColourHashesAddress) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_newColourHashesAddress == address(0)) revert AddressNotSet(); colourHashes = IColourHashes(_newColourHashesAddress); emit ColourHashesSet(_newColourHashesAddress); } function setTreasury(address payable _newTreasury) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_newTreasury == address(0)) revert AddressNotSet(); treasury = _newTreasury; emit TreasuryAddressSet(_newTreasury); } function mintFriendshipDecagon(address _friend) external payable nonReentrant returns (uint256 tokenId1, uint256 tokenId2) { if (!friendshipMintEnabled) revert FriendshipMintingDisabled(); if (msg.value < fee) revert NotEnoughEth(); (tokenId1, tokenId2) = _mint(_friend); (bool sentTreasury, ) = treasury.call{value: msg.value}(""); if (!sentTreasury) revert TransferFailed(); } function _mint(address _friend) internal returns (uint256 tokenId1, uint256 tokenId2) { if (msg.sender == _friend) revert CannotMintFriendshipWithSelf(); bytes32 friendshipHash = generateFriendshipHash(msg.sender, _friend); if (minted[friendshipHash] && oneMintPerFriendship) revert FriendshipAlreadyExists(); minted[friendshipHash] = true; tokenId1 = decagon.mintPassport(msg.sender); tokenId2 = decagon.mintPassport(_friend); bytes32 colourHash = generateColourHash( msg.sender, tokenId1, _friend, tokenId2 ); emit FriendshipMinted(msg.sender, tokenId1, _friend, tokenId2, colourHash); colourHashes.storeColourHash(tokenId1, colourHash); colourHashes.storeColourHash(tokenId2, colourHash); tokenHashes.storeTokenHash(tokenId1); tokenHashes.storeTokenHash(tokenId2); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(account), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * May emit a {RoleGranted} event. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// 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; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv( uint256 x, uint256 y, uint256 denominator, Rounding rounding ) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10**64) { value /= 10**64; result += 64; } if (value >= 10**32) { value /= 10**32; result += 32; } if (value >= 10**16) { value /= 10**16; result += 16; } if (value >= 10**8) { value /= 10**8; result += 8; } if (value >= 10**4) { value /= 10**4; result += 4; } if (value >= 10**2) { value /= 10**2; result += 2; } if (value >= 10**1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0); } } }
{ "optimizer": { "enabled": false, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"uint256","name":"_fee","type":"uint256"},{"internalType":"address payable","name":"_treasuryAddress","type":"address"},{"internalType":"address","name":"_decagonAddress","type":"address"},{"internalType":"address","name":"_tokenHashesAddress","type":"address"},{"internalType":"address","name":"_colourHashesAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AddressNotSet","type":"error"},{"inputs":[],"name":"CannotMintFriendshipWithSelf","type":"error"},{"inputs":[],"name":"FriendshipAlreadyExists","type":"error"},{"inputs":[],"name":"FriendshipMintingDisabled","type":"error"},{"inputs":[],"name":"NotEnoughEth","type":"error"},{"inputs":[],"name":"TransferFailed","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newIColourHashesAddress","type":"address"}],"name":"ColourHashesSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"newFee","type":"uint256"}],"name":"FriendshipFeeSet","type":"event"},{"anonymous":false,"inputs":[],"name":"FriendshipMintToggled","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"friend1","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId1","type":"uint256"},{"indexed":false,"internalType":"address","name":"friend2","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId2","type":"uint256"},{"indexed":true,"internalType":"bytes32","name":"colourHash","type":"bytes32"}],"name":"FriendshipMinted","type":"event"},{"anonymous":false,"inputs":[],"name":"OneMintPerFriendshipToggled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newTokenHashes","type":"address"}],"name":"TokenHashesSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"newTreasuryAddress","type":"address"}],"name":"TreasuryAddressSet","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"colourHashes","outputs":[{"internalType":"contract IColourHashes","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decagon","outputs":[{"internalType":"contract IPassport","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"fee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"friendshipMintEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_address1","type":"address"},{"internalType":"uint256","name":"_tokenId1","type":"uint256"},{"internalType":"address","name":"_address2","type":"address"},{"internalType":"uint256","name":"_tokenId2","type":"uint256"}],"name":"generateColourHash","outputs":[{"internalType":"bytes32","name":"colourHash","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"_address1","type":"address"},{"internalType":"address","name":"_address2","type":"address"}],"name":"generateFriendshipHash","outputs":[{"internalType":"bytes32","name":"friendshipHash","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_friend","type":"address"}],"name":"mintFriendshipDecagon","outputs":[{"internalType":"uint256","name":"tokenId1","type":"uint256"},{"internalType":"uint256","name":"tokenId2","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"minted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"oneMintPerFriendship","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newColourHashesAddress","type":"address"}],"name":"setColourHashes","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newFee","type":"uint256"}],"name":"setFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newTokenHashesAddress","type":"address"}],"name":"setTokenHashes","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address payable","name":"_newTreasury","type":"address"}],"name":"setTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"toggleFriendshipMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"toggleOneMintPerFriendship","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tokenHashes","outputs":[{"internalType":"contract ITokenHashes","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"treasury","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000470de4df82000000000000000000000000000099f20bea59ce9f464147b7de92e59684cff14a08000000000000000000000000d93206bd0062cc054e397ecccdb8436c3fa5700e000000000000000000000000a3b92fe58563ce841f50df08293237e4c866e14e000000000000000000000000563df01d07125c33a296de51335ec040517630e4
-----Decoded View---------------
Arg [0] : _fee (uint256): 20000000000000000
Arg [1] : _treasuryAddress (address): 0x99f20BEA59CE9f464147b7De92E59684cfF14a08
Arg [2] : _decagonAddress (address): 0xd93206BD0062cC054E397eCCCdB8436c3fa5700e
Arg [3] : _tokenHashesAddress (address): 0xa3b92fE58563ce841F50Df08293237e4c866E14E
Arg [4] : _colourHashesAddress (address): 0x563Df01D07125c33a296De51335Ec040517630e4
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000470de4df820000
Arg [1] : 00000000000000000000000099f20bea59ce9f464147b7de92e59684cff14a08
Arg [2] : 000000000000000000000000d93206bd0062cc054e397ecccdb8436c3fa5700e
Arg [3] : 000000000000000000000000a3b92fe58563ce841f50df08293237e4c866e14e
Arg [4] : 000000000000000000000000563df01d07125c33a296de51335ec040517630e4
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.