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Renounce Role | 18021495 | 310 days ago | IN | 0 ETH | 0.00379789 | ||||
Grant Role | 18021492 | 310 days ago | IN | 0 ETH | 0.00804668 | ||||
Grant Role | 18021490 | 310 days ago | IN | 0 ETH | 0.00224016 | ||||
Grant Role | 18021479 | 310 days ago | IN | 0 ETH | 0.00760438 | ||||
0x60806040 | 18021258 | 310 days ago | IN | Create: CallWhitelistAllExtensions | 0 ETH | 0.09738587 |
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Contract Name:
CallWhitelistAllExtensions
Compiler Version
v0.8.18+commit.87f61d96
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.18; import "./CallWhitelist.sol"; import "./CallWhitelistDelegation.sol"; import "./CallWhitelistApprovals.sol"; /** * @title CallWhitelistAllExtensions * @author Non-Fungible Technologies, Inc. * * CallWhitelist with both the approvals and delegation extension. * See CallWhitelist, CallWhitelistApprovals, and CallWhitelistDelegation * contract descriptions for more information. */ contract CallWhitelistAllExtensions is CallWhitelist, CallWhitelistApprovals, CallWhitelistDelegation { /// @dev Deploys the contracts with the needed inherited behavior. constructor(address _registry) CallWhitelistDelegation(_registry) {} }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.18; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/access/AccessControlEnumerable.sol"; import "../interfaces/ICallWhitelist.sol"; import "./CallBlacklist.sol"; import { CW_AlreadyWhitelisted, CW_NotWhitelisted } from "../errors/Vault.sol"; /** * @title CallWhitelist * @author Non-Fungible Technologies, Inc. * * Maintains a whitelist for calls that can be made from an AssetVault. * Intended to be used to allow for "claim" and other-utility based * functions while an asset is being held in escrow. Some functions * are blacklisted, e.g. transfer functions, to prevent callers from * being able to circumvent withdrawal rules for escrowed assets. * Whitelists are specified in terms of "target contract" (callee) * and function selector. * * The contract owner can add or remove items from the whitelist. */ contract CallWhitelist is AccessControlEnumerable, CallBlacklist, ICallWhitelist { using SafeERC20 for IERC20; // ============================================ STATE ============================================== // =================== Constants ===================== bytes32 public constant ADMIN_ROLE = keccak256("ADMIN"); bytes32 public constant WHITELIST_MANAGER_ROLE = keccak256("WHITELIST_MANAGER"); // ================= Whitelist State ================== /** * @notice Whitelist of callable functions on contracts. Maps addresses that * can be called to function selectors which can be called on it. * For example, if we want to allow function call 0x0000 on a contract * at 0x1111, the mapping will contain whitelist[0x1111][0x0000] = true. */ mapping(address => mapping(bytes4 => bool)) private whitelist; // ========================================= CONSTRUCTOR =========================================== /** * @notice Creates a new call whitelist contract, setting up required roles. */ constructor() { _setupRole(ADMIN_ROLE, msg.sender); _setRoleAdmin(ADMIN_ROLE, ADMIN_ROLE); _setRoleAdmin(WHITELIST_MANAGER_ROLE, ADMIN_ROLE); } // ========================================= VIEW FUNCTIONS ========================================= /** * @notice Returns true if the given function on the given callee is whitelisted. * * @param callee The contract that is intended to be called. * @param selector The function selector that is intended to be called. * * @return isWhitelisted True if whitelisted, else false. */ function isWhitelisted(address callee, bytes4 selector) external view override returns (bool) { return !isBlacklisted(selector) && whitelist[callee][selector]; } // ======================================== UPDATE OPERATIONS ======================================= /** * @notice Add the given callee and selector to the whitelist. Can only be called by owner. * * @dev A blacklist supersedes a whitelist, so should not add blacklisted selectors. * Calls which are already whitelisted will revert. * * @param callee The contract to whitelist. * @param selector The function selector to whitelist. */ function add(address callee, bytes4 selector) external override onlyRole(WHITELIST_MANAGER_ROLE) { mapping(bytes4 => bool) storage calleeWhitelist = whitelist[callee]; if (calleeWhitelist[selector]) revert CW_AlreadyWhitelisted(callee, selector); calleeWhitelist[selector] = true; emit CallAdded(msg.sender, callee, selector); } /** * @notice Remove the given callee and selector from the whitelist. Can only be called by owner. * * @dev Calls which are not already whitelisted will revert. * * @param callee The contract to whitelist. * @param selector The function selector to whitelist. */ function remove(address callee, bytes4 selector) external override onlyRole(WHITELIST_MANAGER_ROLE) { mapping(bytes4 => bool) storage calleeWhitelist = whitelist[callee]; if (!calleeWhitelist[selector]) revert CW_NotWhitelisted(callee, selector); calleeWhitelist[selector] = false; emit CallRemoved(msg.sender, callee, selector); } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.18; import "../external/interfaces/IDelegationRegistry.sol"; import "./CallWhitelist.sol"; import { CWD_RegistryAlreadySet, CWD_ZeroAddress } from "../errors/Vault.sol"; /** * @title CallWhitelistDelegation * @author Non-Fungible Technologies, Inc. * * Adds delegation functionality to CallWhitelist, allowing the * whitelist manager to decide which collections can be used with * the DelegateCash registry. Each token should be considered for * possible implications of delegation before adding to the whitelist. * * If a token is on the whitelist, delegateForContract and delegateForToken * will be enabled for that token. * * WARNING: adding these functions to the core CallWhitelist whitelist will bypass * the delegation functions that check the whitelist for which tokens can * be delegated. The whitelist manager should take care not to use both the core * whitelist for delegation as well as the delegation whitelist. */ contract CallWhitelistDelegation is CallWhitelist { event DelegationSet(address indexed caller, address indexed token, bool isApproved); event RegistryChanged(address indexed caller, address indexed registry); // ============================================ STATE ============================================== // ================= Whitelist State ================== /// @notice Tokens approved for delegation. /// @dev token -> isApproved mapping(address => bool) private delegationApproved; /// @notice The delegation registry for the whitelist. IDelegationRegistry public registry; // ========================================== CONSTRUCTOR =========================================== /** * @dev Initializes values so initialize cannot be called on template. */ constructor(address _registry) { if (_registry == address(0)) revert CWD_ZeroAddress(); registry = IDelegationRegistry(_registry); } // ========================================= VIEW FUNCTIONS ========================================= /** * @notice Returns true if the given spender is approved to spend the given token. * * @param token The token approval to check. * * @return isDelegationApproved True if the token can be delegated, else false. */ function isDelegationApproved(address token) public view returns (bool) { return delegationApproved[token]; } // ======================================== UPDATE OPERATIONS ======================================= /** * @notice Sets approval status of a given token for a spender. Note that this is * NOT a token approval - it is permission to register a delegation from * the vault. * * @param token The token approval to set. * @param _isApproved Whether the token should be approved. */ function setDelegationApproval(address token, bool _isApproved) external onlyRole(WHITELIST_MANAGER_ROLE) { delegationApproved[token] = _isApproved; emit DelegationSet(msg.sender, token, _isApproved); } /** * @notice Sets the registry for the whitelist. Should only be used in case * of delegate cash migration to new registry. * * @param _registry The new registry. */ function setRegistry(address _registry) external onlyRole(ADMIN_ROLE) { if (address(registry) == _registry) revert CWD_RegistryAlreadySet(); registry = IDelegationRegistry(_registry); emit RegistryChanged(msg.sender, _registry); } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.18; import "./CallWhitelist.sol"; /** * @title CallWhitelistApprovals * @author Non-Fungible Technologies, Inc. * * Adds approvals functionality to CallWhitelist. Certain spenders * can be approved for tokens on vaults, with the requisite ability * to withdraw. Should not be used for tokens acting as collateral. * * The contract owner can add or remove approved token/spender pairs. */ contract CallWhitelistApprovals is CallWhitelist { event ApprovalSet(address indexed caller, address indexed token, address indexed spender, bool isApproved); // ============================================ STATE ============================================== // ================= Whitelist State ================== /// @notice Approved spenders of vault tokens. /// @dev token -> spender -> isApproved mapping(address => mapping(address => bool)) private approvals; /** * @notice Returns true if the given spender is approved to spend the given token. * * @param token The token approval to check. * @param spender The token spender. * * @return isApproved True if approved, else false. */ function isApproved(address token, address spender) public view returns (bool) { return approvals[token][spender]; } // ======================================== UPDATE OPERATIONS ======================================= /** * @notice Sets approval status of a given token for a spender. Note that this is * NOT a token approval - it is permission to create a token approval from * the asset vault. * * @param token The token approval to set. * @param spender The token spender. * @param _isApproved Whether the spender should be approved. */ function setApproval(address token, address spender, bool _isApproved) external onlyRole(WHITELIST_MANAGER_ROLE) { approvals[token][spender] = _isApproved; emit ApprovalSet(msg.sender, token, spender, _isApproved); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IAccessControlEnumerable.sol"; import "./AccessControl.sol"; import "../utils/structs/EnumerableSet.sol"; /** * @dev Extension of {AccessControl} that allows enumerating the members of each role. */ abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl { using EnumerableSet for EnumerableSet.AddressSet; mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlEnumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view override returns (address) { return _roleMembers[role].at(index); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view override returns (uint256) { return _roleMembers[role].length(); } /** * @dev Overload {grantRole} to track enumerable memberships */ function grantRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) { super.grantRole(role, account); _roleMembers[role].add(account); } /** * @dev Overload {revokeRole} to track enumerable memberships */ function revokeRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) { super.revokeRole(role, account); _roleMembers[role].remove(account); } /** * @dev Overload {renounceRole} to track enumerable memberships */ function renounceRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) { super.renounceRole(role, account); _roleMembers[role].remove(account); } /** * @dev Overload {_setupRole} to track enumerable memberships */ function _setupRole(bytes32 role, address account) internal virtual override { super._setupRole(role, account); _roleMembers[role].add(account); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.18; interface ICallWhitelist { // ============= Events ============== event CallAdded(address operator, address callee, bytes4 selector); event CallRemoved(address operator, address callee, bytes4 selector); // ================ View Functions ================ function isWhitelisted(address callee, bytes4 selector) external view returns (bool); // ================ Update Operations ================ function add(address callee, bytes4 selector) external; function remove(address callee, bytes4 selector) external; }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.18; import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; //solhint-disable max-line-length /** * @title CallBlacklist * @author Non-Fungible Technologies, Inc. * * Library contract maintaining an immutable blacklist for any CallWhitelist contract * (or CallWhitelistApprovals). These functions can never be called through the vault's * `call` functionality. Note that CallWhitelistApprovals still allows approvals to take * place based on certain spenders set in `setApproval`. */ abstract contract CallBlacklist { // ============================================ STATE ============================================== // ============= Global Immutable State ============== /** * @dev Global blacklist for transfer functions. */ bytes4 private constant ERC20_TRANSFER = IERC20.transfer.selector; bytes4 private constant ERC20_ERC721_APPROVE = IERC20.approve.selector; bytes4 private constant ERC20_ERC721_TRANSFER_FROM = IERC20.transferFrom.selector; bytes4 private constant ERC20_INCREASE_ALLOWANCE = bytes4(keccak256("increaseAllowance(address,uint256)")); bytes4 private constant ERC20_BURN = bytes4(keccak256("burn(address,uint256)")); bytes4 private constant ERC20_BURN_FROM = bytes4(keccak256("burnFrom(address,uint256)")); bytes4 private constant ERC721_SAFE_TRANSFER_FROM = bytes4(keccak256("safeTransferFrom(address,address,uint256)")); bytes4 private constant ERC721_SAFE_TRANSFER_FROM_DATA = bytes4(keccak256("safeTransferFrom(address,address,uint256,bytes)")); bytes4 private constant ERC721_ERC1155_SET_APPROVAL = IERC721.setApprovalForAll.selector; bytes4 private constant ERC721_BURN = bytes4(keccak256("burn(uint256)")); bytes4 private constant ERC1155_SAFE_TRANSFER_FROM = IERC1155.safeTransferFrom.selector; bytes4 private constant ERC1155_SAFE_BATCH_TRANSFER_FROM = IERC1155.safeBatchTransferFrom.selector; bytes4 private constant ERC1155_BURN = bytes4(keccak256("burn(address,uint256,uint256)")); bytes4 private constant ERC1155_BURN_BATCH = bytes4(keccak256("burn(address,uint256[],uint256[])")); bytes4 private constant PUNKS_TRANSFER = bytes4(keccak256("transferPunk(address,uint256)")); bytes4 private constant PUNKS_OFFER = bytes4(keccak256("offerPunkForSale(uint256,uint256)")); bytes4 private constant PUNKS_OFFER_TO_ADDRESS = bytes4(keccak256("offerPunkForSaleToAddress(uint256,uint256,address)")); bytes4 private constant PUNKS_BUY = bytes4(keccak256("buyPunk(uint256)")); bytes4 private constant SUPERRARE_SET_SALE_PRICE = bytes4(keccak256("setSalePrice(uint256,uint256)")); bytes4 private constant SUPERRARE_ACCEPT_BID = bytes4(keccak256("acceptBid(uint256)")); // SuperRare transfer already blacklisted - same elector as IERC20.transfer // SuperRare approve already blacklisted - same elector as IERC20.approve // ================= Blacklist State ================== /** * @notice Returns true if the given function selector is on the global blacklist. * Blacklisted function selectors cannot be called on any contract. * * @param selector The function selector to check. * * @return isBlacklisted True if blacklisted, else false. */ function isBlacklisted(bytes4 selector) public pure returns (bool) { return selector == ERC20_TRANSFER || selector == ERC20_ERC721_APPROVE || selector == ERC20_ERC721_TRANSFER_FROM || selector == ERC20_INCREASE_ALLOWANCE || selector == ERC20_BURN || selector == ERC20_BURN_FROM || selector == ERC721_SAFE_TRANSFER_FROM || selector == ERC721_SAFE_TRANSFER_FROM_DATA || selector == ERC721_ERC1155_SET_APPROVAL || selector == ERC721_BURN || selector == ERC1155_SAFE_TRANSFER_FROM || selector == ERC1155_SAFE_BATCH_TRANSFER_FROM || selector == ERC1155_BURN || selector == ERC1155_BURN_BATCH || selector == PUNKS_TRANSFER || selector == PUNKS_OFFER || selector == PUNKS_OFFER_TO_ADDRESS || selector == PUNKS_BUY || selector == SUPERRARE_SET_SALE_PRICE || selector == SUPERRARE_ACCEPT_BID; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.18; /** * @title VaultErrors * @author Non-Fungible Technologies, Inc. * * This file contains all custom errors for vault contracts used by the protocol. * All errors prefixed by the contract that throws them (e.g., "AV_" for Asset Vault). * Errors located in one place to make it possible to holistically look at all * asset vault failure cases. */ // ==================================== Asset Vault ====================================== /// @notice All errors prefixed with AV_, to separate from other contracts in the protocol. /** * @notice Vault withdraws must be enabled. */ error AV_WithdrawsDisabled(); /** * @notice Vault withdraws enabled. */ error AV_WithdrawsEnabled(); /** * @notice Asset vault already initialized. * * @param ownershipToken Caller of initialize function in asset vault contract. */ error AV_AlreadyInitialized(address ownershipToken); /** * @notice CanCallOn authorization returned false. * * @param caller Msg.sender of the function call. */ error AV_MissingAuthorization(address caller); /** * @notice Call disallowed. * * @param to The contract address to call. * @param data The data to call the contract with. */ error AV_NonWhitelistedCall(address to, bytes4 data); /** * @notice Approval disallowed. * * @param token The token to approve. * @param spender The spender to approve. */ error AV_NonWhitelistedApproval(address token, address spender); /** * @notice Cannot withdraw more than 25 items from a vault at a time. * * @param arrayLength Total elements provided. */ error AV_TooManyItems(uint256 arrayLength); /** * @notice The length of either the tokenIds or tokenTypes array does not match * the length of the tokenAddress array. * * @param arrayType Array type that does not match tokenAddress array length. */ error AV_LengthMismatch(string arrayType); /** * @notice Zero address passed in where not allowed. * * @param addressType The name of the parameter for which a zero address was provided. */ error AV_ZeroAddress(string addressType); /** * @notice Delegation disallowed. * * @param token The token to delegate. */ error AV_NonWhitelistedDelegation(address token); // ==================================== Ownable ERC721 ====================================== /// @notice All errors prefixed with OERC721_, to separate from other contracts in the protocol. /** * @notice Function caller is not the owner. * * @param caller Msg.sender of the function call. */ error OERC721_CallerNotOwner(address caller); // ==================================== Vault Factory ====================================== /// @notice All errors prefixed with VF_, to separate from other contracts in the protocol. /** * @notice Zero address passed in where not allowed. * * @param addressType The name of the parameter for which a zero address was provided. */ error VF_ZeroAddress(string addressType); /** * @notice Global index out of bounds. * * @param tokenId AW-V2 tokenId of the asset vault. */ error VF_TokenIdOutOfBounds(uint256 tokenId); /** * @notice Cannot transfer with withdraw enabled. * * @param tokenId AW-V2 tokenId of the asset vault. */ error VF_NoTransferWithdrawEnabled(uint256 tokenId); /** * @notice Not enough msg.value sent for the required mint fee. * * @param value The msg.value. * @param requiredMintFee The required mint fee. */ error VF_InsufficientMintFee(uint256 value, uint256 requiredMintFee); /** * @notice Non-existant token id provided as argument. * * @param tokenId The ID of the token to lookup the URI for. */ error VF_DoesNotExist(uint256 tokenId); // ================================== Call Whitelist ====================================== /// @notice All errors prefixed with CW_, to separate from other contracts in the protocol. /** * @notice Cannot whitelist a call which has already been whitelisted. * * @param callee The contract to be added to CallWhitelist mapping. * @param selector The function selector to be added to CallWhitelist mapping. */ error CW_AlreadyWhitelisted(address callee, bytes4 selector); /** * @notice Cannot remove a call from the CallWhitelist that has not yet been added. * * @param callee The contract to be removed from CallWhitelist mapping. * @param selector The function selector to be removed from CallWhitelist mapping. */ error CW_NotWhitelisted(address callee, bytes4 selector); // ================================== Call Whitelist Delegation ====================================== /** * @notice Zero address passed in the constructor. */ error CWD_ZeroAddress(); /** * @notice The registry address provided is currently set as the registry. */ error CWD_RegistryAlreadySet();
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @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); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IAccessControl.sol"; /** * @dev External interface of AccessControlEnumerable declared to support ERC165 detection. */ interface IAccessControlEnumerable is IAccessControl { /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) external view returns (address); /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) external view returns (uint256); }
// SPDX-License-Identifier: MIT 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})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role, _msgSender()); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(uint160(account), 20), " 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 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. */ 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. */ 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 granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ 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. * * [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}. * ==== */ 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); } function _grantRole(bytes32 role, address account) private { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT 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 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 pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @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] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT 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 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 pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC1155 compliant contract, as defined in the * https://eips.ethereum.org/EIPS/eip-1155[EIP]. * * _Available since v3.1._ */ interface IERC1155 is IERC165 { /** * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`. */ event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); /** * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all * transfers. */ event TransferBatch( address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values ); /** * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to * `approved`. */ event ApprovalForAll(address indexed account, address indexed operator, bool approved); /** * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI. * * If an {URI} event was emitted for `id`, the standard * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value * returned by {IERC1155MetadataURI-uri}. */ event URI(string value, uint256 indexed id); /** * @dev Returns the amount of tokens of token type `id` owned by `account`. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) external view returns (uint256); /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory); /** * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`, * * Emits an {ApprovalForAll} event. * * Requirements: * * - `operator` cannot be the caller. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns true if `operator` is approved to transfer ``account``'s tokens. * * See {setApprovalForAll}. */ function isApprovedForAll(address account, address operator) external view returns (bool); /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes calldata data ) external; /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function safeBatchTransferFrom( address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: CC0-1.0 pragma solidity 0.8.18; /** * @notice Sourced from: * https://docs.delegate.cash/delegatecash/technical-documentation/delegation-registry/idelegationregistry.sol */ /** * @title An immutable registry contract to be deployed as a standalone primitive * @dev See EIP-5639, new project launches can read previous cold wallet -> hot wallet delegations * from here and integrate those permissions into their flow */ interface IDelegationRegistry { /// @notice Delegation type enum DelegationType { NONE, ALL, CONTRACT, TOKEN } /// @notice Info about a single delegation, used for onchain enumeration struct DelegationInfo { DelegationType type_; address vault; address delegate; address contract_; uint256 tokenId; } /// @notice Info about a single contract-level delegation struct ContractDelegation { address contract_; address delegate; } /// @notice Info about a single token-level delegation struct TokenDelegation { address contract_; uint256 tokenId; address delegate; } /// @notice Emitted when a user delegates their entire wallet event DelegateForAll(address vault, address delegate, bool value); /// @notice Emitted when a user delegates a specific contract event DelegateForContract(address vault, address delegate, address contract_, bool value); /// @notice Emitted when a user delegates a specific token event DelegateForToken(address vault, address delegate, address contract_, uint256 tokenId, bool value); /// @notice Emitted when a user revokes all delegations event RevokeAllDelegates(address vault); /// @notice Emitted when a user revoes all delegations for a given delegate event RevokeDelegate(address vault, address delegate); /** * ----------- WRITE ----------- */ /** * @notice Allow the delegate to act on your behalf for all contracts * @param delegate The hotwallet to act on your behalf * @param value Whether to enable or disable delegation for this address, true for setting and false for revoking */ function delegateForAll(address delegate, bool value) external; /** * @notice Allow the delegate to act on your behalf for a specific contract * @param delegate The hotwallet to act on your behalf * @param contract_ The address for the contract you're delegating * @param value Whether to enable or disable delegation for this address, true for setting and false for revoking */ function delegateForContract(address delegate, address contract_, bool value) external; /** * @notice Allow the delegate to act on your behalf for a specific token * @param delegate The hotwallet to act on your behalf * @param contract_ The address for the contract you're delegating * @param tokenId The token id for the token you're delegating * @param value Whether to enable or disable delegation for this address, true for setting and false for revoking */ function delegateForToken(address delegate, address contract_, uint256 tokenId, bool value) external; /** * @notice Revoke all delegates */ function revokeAllDelegates() external; /** * @notice Revoke a specific delegate for all their permissions * @param delegate The hotwallet to revoke */ function revokeDelegate(address delegate) external; /** * @notice Remove yourself as a delegate for a specific vault * @param vault The vault which delegated to the msg.sender, and should be removed */ function revokeSelf(address vault) external; /** * ----------- READ ----------- */ /** * @notice Returns all active delegations a given delegate is able to claim on behalf of * @param delegate The delegate that you would like to retrieve delegations for * @return info Array of DelegationInfo structs */ function getDelegationsByDelegate(address delegate) external view returns (DelegationInfo[] memory); /** * @notice Returns an array of wallet-level delegates for a given vault * @param vault The cold wallet who issued the delegation * @return addresses Array of wallet-level delegates for a given vault */ function getDelegatesForAll(address vault) external view returns (address[] memory); /** * @notice Returns an array of contract-level delegates for a given vault and contract * @param vault The cold wallet who issued the delegation * @param contract_ The address for the contract you're delegating * @return addresses Array of contract-level delegates for a given vault and contract */ function getDelegatesForContract(address vault, address contract_) external view returns (address[] memory); /** * @notice Returns an array of contract-level delegates for a given vault's token * @param vault The cold wallet who issued the delegation * @param contract_ The address for the contract holding the token * @param tokenId The token id for the token you're delegating * @return addresses Array of contract-level delegates for a given vault's token */ function getDelegatesForToken(address vault, address contract_, uint256 tokenId) external view returns (address[] memory); /** * @notice Returns all contract-level delegations for a given vault * @param vault The cold wallet who issued the delegations * @return delegations Array of ContractDelegation structs */ function getContractLevelDelegations(address vault) external view returns (ContractDelegation[] memory delegations); /** * @notice Returns all token-level delegations for a given vault * @param vault The cold wallet who issued the delegations * @return delegations Array of TokenDelegation structs */ function getTokenLevelDelegations(address vault) external view returns (TokenDelegation[] memory delegations); /** * @notice Returns true if the address is delegated to act on the entire vault * @param delegate The hotwallet to act on your behalf * @param vault The cold wallet who issued the delegation */ function checkDelegateForAll(address delegate, address vault) external view returns (bool); /** * @notice Returns true if the address is delegated to act on your behalf for a token contract or an entire vault * @param delegate The hotwallet to act on your behalf * @param contract_ The address for the contract you're delegating * @param vault The cold wallet who issued the delegation */ function checkDelegateForContract(address delegate, address vault, address contract_) external view returns (bool); /** * @notice Returns true if the address is delegated to act on your behalf for a specific token, the token's contract or an entire vault * @param delegate The hotwallet to act on your behalf * @param contract_ The address for the contract you're delegating * @param tokenId The token id for the token you're delegating * @param vault The cold wallet who issued the delegation */ function checkDelegateForToken(address delegate, address vault, address contract_, uint256 tokenId) external view returns (bool); }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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IDelegationRegistry","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"callee","type":"address"},{"internalType":"bytes4","name":"selector","type":"bytes4"}],"name":"remove","outputs":[],"stateMutability":"nonpayable","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":"token","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"bool","name":"_isApproved","type":"bool"}],"name":"setApproval","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"bool","name":"_isApproved","type":"bool"}],"name":"setDelegationApproval","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_registry","type":"address"}],"name":"setRegistry","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","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)
00000000000000000000000000000000000076a84fef008cdabe6409d2fe638b
-----Decoded View---------------
Arg [0] : _registry (address): 0x00000000000076A84feF008CDAbe6409d2FE638B
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000076a84fef008cdabe6409d2fe638b
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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.