ERC-721
Overview
Max Total Supply
0 DT
Holders
10
Total Transfers
-
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
DelegateToken
Compiler Version
v0.8.21+commit.d9974bed
Optimization Enabled:
Yes with 9999999 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.21; import {IDelegateToken, IERC721Metadata, IERC721Receiver, IERC1155Receiver} from "./interfaces/IDelegateToken.sol"; import {MarketMetadata} from "./MarketMetadata.sol"; import {PrincipalToken} from "./PrincipalToken.sol"; import {ReentrancyGuard} from "openzeppelin/security/ReentrancyGuard.sol"; import {IDelegateRegistry, DelegateTokenErrors as Errors, DelegateTokenStructs as Structs, DelegateTokenHelpers as Helpers} from "./libraries/DelegateTokenLib.sol"; import {DelegateTokenStorageHelpers as StorageHelpers} from "./libraries/DelegateTokenStorageHelpers.sol"; import {DelegateTokenRegistryHelpers as RegistryHelpers, RegistryHashes} from "./libraries/DelegateTokenRegistryHelpers.sol"; import {DelegateTokenTransferHelpers as TransferHelpers, SafeERC20, IERC721, IERC20, IERC1155} from "./libraries/DelegateTokenTransferHelpers.sol"; contract DelegateToken is ReentrancyGuard, IDelegateToken { /*////////////////////////////////////////////////////////////// / IMMUTABLES / //////////////////////////////////////////////////////////////*/ /// @inheritdoc IDelegateToken address public immutable override delegateRegistry; /// @inheritdoc IDelegateToken address public immutable override principalToken; /// @inheritdoc IDelegateToken address public immutable marketMetadata; /*////////////////////////////////////////////////////////////// / STORAGE / //////////////////////////////////////////////////////////////*/ /// @dev delegateId, a hash of (msg.sender, salt), points a unique id to the StoragePosition mapping(uint256 delegateTokenId => uint256[3] info) internal delegateTokenInfo; /// @notice mapping for ERC721 balances mapping(address delegateTokenHolder => uint256 balance) internal balances; /// @notice approve for all mapping mapping(address account => mapping(address operator => bool enabled)) internal accountOperator; /// @notice internal variables for Principle Token callbacks Structs.Uint256 internal principalMintAuthorization = Structs.Uint256(StorageHelpers.MINT_NOT_AUTHORIZED); Structs.Uint256 internal principalBurnAuthorization = Structs.Uint256(StorageHelpers.BURN_NOT_AUTHORIZED); /// @notice internal variable 11155 callbacks Structs.Uint256 internal erc1155PullAuthorization = Structs.Uint256(TransferHelpers.ERC1155_NOT_PULLED); /*////////////////////////////////////////////////////////////// / CONSTRUCTOR / //////////////////////////////////////////////////////////////*/ //slither-disable-next-line missing-zero-check constructor(address _delegateRegistry, address _principalToken, address _marketMetadata) { delegateRegistry = _delegateRegistry; principalToken = _principalToken; marketMetadata = _marketMetadata; } /*////////////////////////////////////////////////////////////// / MULTICALL / //////////////////////////////////////////////////////////////*/ function multicall(bytes[] calldata data) external returns (bytes[] memory results) { results = new bytes[](data.length); bool success; unchecked { for (uint256 i = 0; i < data.length; ++i) { //slither-disable-next-line calls-loop,delegatecall-loop (success, results[i]) = address(this).delegatecall(data[i]); if (!success) revert Errors.MulticallFailed(); } } } /*////////////////////////////////////////////////////////////// / INTERFACES / //////////////////////////////////////////////////////////////*/ function supportsInterface(bytes4 interfaceId) external pure returns (bool) { return interfaceId == 0x2a55205a // ERC165 Interface ID for ERC2981 || interfaceId == 0x01ffc9a7 // ERC165 Interface ID for ERC165 || interfaceId == 0x80ac58cd // ERC165 Interface ID for ERC721 || interfaceId == 0x5b5e139f // ERC165 Interface ID for ERC721Metadata || interfaceId == 0x150b7a02 // ERC165 Interface ID for ERC721TokenReceiver || interfaceId == 0x4e2312e0; // ERC165 Interface ID for ERC1155TokenReceiver } /*////////////////////////////////////////////////////////////// / ERCTOKENRECEIVER METHODS / //////////////////////////////////////////////////////////////*/ /// @inheritdoc IERC721Receiver function onERC721Received(address operator, address, uint256, bytes calldata) external view returns (bytes4) { if (address(this) == operator) return IERC721Receiver.onERC721Received.selector; revert Errors.InvalidERC721TransferOperator(); } /// @inheritdoc IERC1155Receiver function onERC1155Received(address operator, address, uint256, uint256, bytes calldata) external returns (bytes4) { TransferHelpers.revertInvalidERC1155PullCheck(erc1155PullAuthorization, operator); return IERC1155Receiver.onERC1155Received.selector; } /// @inheritdoc IERC1155Receiver function onERC1155BatchReceived(address, address, uint256[] calldata, uint256[] calldata, bytes calldata) external pure returns (bytes4) { revert Errors.BatchERC1155TransferUnsupported(); } /*////////////////////////////////////////////////////////////// / ERC721 METHODS / //////////////////////////////////////////////////////////////*/ /// @inheritdoc IERC721 function balanceOf(address delegateTokenHolder) external view returns (uint256) { if (delegateTokenHolder == address(0)) revert Errors.DelegateTokenHolderZero(); return balances[delegateTokenHolder]; } /// @inheritdoc IERC721 function ownerOf(uint256 delegateTokenId) external view returns (address delegateTokenHolder) { delegateTokenHolder = RegistryHelpers.loadTokenHolder(delegateRegistry, StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId)); if (delegateTokenHolder == address(0)) revert Errors.DelegateTokenHolderZero(); } /// @inheritdoc IERC721 function getApproved(uint256 delegateTokenId) external view returns (address) { StorageHelpers.revertNotMinted(delegateTokenInfo, delegateTokenId); return StorageHelpers.readApproved(delegateTokenInfo, delegateTokenId); } /// @inheritdoc IERC721 function isApprovedForAll(address account, address operator) external view returns (bool) { return accountOperator[account][operator]; } /// @inheritdoc IERC721 function safeTransferFrom(address from, address to, uint256 delegateTokenId, bytes calldata data) external { transferFrom(from, to, delegateTokenId); Helpers.revertOnInvalidERC721ReceiverCallback(from, to, delegateTokenId, data); } /// @inheritdoc IERC721 function safeTransferFrom(address from, address to, uint256 delegateTokenId) external { transferFrom(from, to, delegateTokenId); Helpers.revertOnInvalidERC721ReceiverCallback(from, to, delegateTokenId); } /// @inheritdoc IERC721 function approve(address spender, uint256 delegateTokenId) external { bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId); StorageHelpers.revertNotMinted(registryHash, delegateTokenId); address delegateTokenHolder = RegistryHelpers.loadTokenHolder(delegateRegistry, registryHash); StorageHelpers.revertNotOwner(delegateTokenHolder); StorageHelpers.writeApproved(delegateTokenInfo, delegateTokenId, spender); emit Approval(delegateTokenHolder, spender, delegateTokenId); } /// @inheritdoc IERC721 function setApprovalForAll(address operator, bool approved) external { accountOperator[msg.sender][operator] = approved; emit ApprovalForAll(msg.sender, operator, approved); } /// @inheritdoc IERC721 /// @dev should revert if msg.sender does not meet one of the following: /// - msg.sender is from address /// - from has approved msg.sender for all /// - msg.sender is approved for the delegateTokenId /// @dev balances should be incremented / decremented for from / to /// @dev approved for the delegateTokenId should be deleted (reset) /// @dev must emit the ERC721 Transfer(from, to, delegateTokenId) event /// @dev toAmount stored in the related registry delegation must be retrieved directly from registry storage and /// not via the CheckDelegate method to avoid invariants with "[specific rights]" and "" classes /// @dev registryHash for the DelegateTokenId must point to the new registry delegation associated with the to /// address function transferFrom(address from, address to, uint256 delegateTokenId) public { if (to == address(0)) revert Errors.ToIsZero(); bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId); StorageHelpers.revertNotMinted(registryHash, delegateTokenId); (address delegateTokenHolder, address underlyingContract) = RegistryHelpers.loadTokenHolderAndContract(delegateRegistry, registryHash); if (from != delegateTokenHolder) revert Errors.FromNotDelegateTokenHolder(); // We can use `from` here instead of delegateTokenHolder since we've just verified that from == delegateTokenHolder StorageHelpers.revertNotApprovedOrOperator(accountOperator, delegateTokenInfo, from, delegateTokenId); StorageHelpers.incrementBalance(balances, to); StorageHelpers.decrementBalance(balances, from); StorageHelpers.writeApproved(delegateTokenInfo, delegateTokenId, address(0)); emit Transfer(from, to, delegateTokenId); IDelegateRegistry.DelegationType underlyingType = RegistryHashes.decodeType(registryHash); bytes32 underlyingRights = RegistryHelpers.loadRights(delegateRegistry, registryHash); bytes32 newRegistryHash = 0; if (underlyingType == IDelegateRegistry.DelegationType.ERC721) { uint256 underlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash); newRegistryHash = RegistryHashes.erc721Hash(address(this), underlyingRights, to, underlyingTokenId, underlyingContract); StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash); RegistryHelpers.transferERC721(delegateRegistry, registryHash, from, newRegistryHash, to, underlyingRights, underlyingContract, underlyingTokenId); } else if (underlyingType == IDelegateRegistry.DelegationType.ERC20) { newRegistryHash = RegistryHashes.erc20Hash(address(this), underlyingRights, to, underlyingContract); StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash); RegistryHelpers.transferERC20( delegateRegistry, registryHash, from, newRegistryHash, to, StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId), underlyingRights, underlyingContract ); } else if (underlyingType == IDelegateRegistry.DelegationType.ERC1155) { uint256 underlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash); newRegistryHash = RegistryHashes.erc1155Hash(address(this), underlyingRights, to, underlyingTokenId, underlyingContract); StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash); RegistryHelpers.transferERC1155( delegateRegistry, registryHash, from, newRegistryHash, to, StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId), underlyingRights, underlyingContract, underlyingTokenId ); } } /*////////////////////////////////////////////////////////////// / EXTENDED ERC721 METHODS / //////////////////////////////////////////////////////////////*/ /// @inheritdoc IERC721Metadata function name() external pure returns (string memory) { return "Delegate Token"; } /// @inheritdoc IERC721Metadata function symbol() external pure returns (string memory) { return "DT"; } /// @inheritdoc IERC721Metadata function tokenURI(uint256 delegateTokenId) external view returns (string memory) { return MarketMetadata(marketMetadata).delegateTokenURI(delegateTokenId, getDelegateTokenInfo(delegateTokenId)); } /// @inheritdoc IDelegateToken function isApprovedOrOwner(address spender, uint256 delegateTokenId) external view returns (bool) { bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId); StorageHelpers.revertNotMinted(registryHash, delegateTokenId); address delegateTokenHolder = RegistryHelpers.loadTokenHolder(delegateRegistry, registryHash); return spender == delegateTokenHolder || accountOperator[delegateTokenHolder][spender] || StorageHelpers.readApproved(delegateTokenInfo, delegateTokenId) == spender; } /// @inheritdoc IDelegateToken function baseURI() external view returns (string memory) { return MarketMetadata(marketMetadata).baseURI(); } /// @inheritdoc IDelegateToken function contractURI() external view returns (string memory) { return MarketMetadata(marketMetadata).delegateTokenContractURI(); } function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount) { (receiver, royaltyAmount) = MarketMetadata(marketMetadata).royaltyInfo(tokenId, salePrice); } /*////////////////////////////////////////////////////////////// / DELEGATE TOKEN METHODS / //////////////////////////////////////////////////////////////*/ /// @inheritdoc IDelegateToken function getDelegateTokenInfo(uint256 delegateTokenId) public view returns (Structs.DelegateInfo memory delegateInfo) { bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId); StorageHelpers.revertNotMinted(registryHash, delegateTokenId); delegateInfo.tokenType = RegistryHashes.decodeType(registryHash); (delegateInfo.delegateHolder, delegateInfo.tokenContract) = RegistryHelpers.loadTokenHolderAndContract(delegateRegistry, registryHash); delegateInfo.rights = RegistryHelpers.loadRights(delegateRegistry, registryHash); delegateInfo.principalHolder = IERC721(principalToken).ownerOf(delegateTokenId); delegateInfo.expiry = StorageHelpers.readExpiry(delegateTokenInfo, delegateTokenId); if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC20) delegateInfo.tokenId = 0; else delegateInfo.tokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash); if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC721) delegateInfo.amount = 0; else delegateInfo.amount = StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId); } /// @inheritdoc IDelegateToken function getDelegateTokenId(address caller, uint256 salt) external view returns (uint256 delegateTokenId) { delegateTokenId = Helpers.delegateIdNoRevert(caller, salt); StorageHelpers.revertAlreadyExisted(delegateTokenInfo, delegateTokenId); } /// @inheritdoc IDelegateToken function burnAuthorizedCallback() external view { StorageHelpers.checkBurnAuthorized(principalToken, principalBurnAuthorization); } /// @inheritdoc IDelegateToken function mintAuthorizedCallback() external view { StorageHelpers.checkMintAuthorized(principalToken, principalMintAuthorization); } /// @inheritdoc IDelegateToken function create(Structs.DelegateInfo calldata delegateInfo, uint256 salt) external nonReentrant returns (uint256 delegateTokenId) { TransferHelpers.pullAssetsAndCheckType(erc1155PullAuthorization, delegateInfo); Helpers.revertOldExpiry(delegateInfo.expiry); if (delegateInfo.delegateHolder == address(0)) revert Errors.ToIsZero(); delegateTokenId = Helpers.delegateIdNoRevert(msg.sender, salt); StorageHelpers.revertAlreadyExisted(delegateTokenInfo, delegateTokenId); StorageHelpers.incrementBalance(balances, delegateInfo.delegateHolder); StorageHelpers.writeExpiry(delegateTokenInfo, delegateTokenId, delegateInfo.expiry); emit Transfer(address(0), delegateInfo.delegateHolder, delegateTokenId); bytes32 newRegistryHash = 0; if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC721) { newRegistryHash = RegistryHashes.erc721Hash(address(this), delegateInfo.rights, delegateInfo.delegateHolder, delegateInfo.tokenId, delegateInfo.tokenContract); StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash); RegistryHelpers.delegateERC721(delegateRegistry, newRegistryHash, delegateInfo); } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC20) { StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, delegateInfo.amount); newRegistryHash = RegistryHashes.erc20Hash(address(this), delegateInfo.rights, delegateInfo.delegateHolder, delegateInfo.tokenContract); StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash); RegistryHelpers.incrementERC20(delegateRegistry, newRegistryHash, delegateInfo); } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC1155) { StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, delegateInfo.amount); newRegistryHash = RegistryHashes.erc1155Hash(address(this), delegateInfo.rights, delegateInfo.delegateHolder, delegateInfo.tokenId, delegateInfo.tokenContract); StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, newRegistryHash); RegistryHelpers.incrementERC1155(delegateRegistry, newRegistryHash, delegateInfo); } StorageHelpers.mintPrincipal(principalToken, principalMintAuthorization, delegateInfo.principalHolder, delegateTokenId); } /// @inheritdoc IDelegateToken function extend(uint256 delegateTokenId, uint256 newExpiry) external { StorageHelpers.revertNotMinted(delegateTokenInfo, delegateTokenId); Helpers.revertOldExpiry(newExpiry); uint256 previousExpiry = StorageHelpers.readExpiry(delegateTokenInfo, delegateTokenId); if (newExpiry <= previousExpiry) revert Errors.ExpiryTooSmall(); if (PrincipalToken(principalToken).isApprovedOrOwner(msg.sender, delegateTokenId)) { StorageHelpers.writeExpiry(delegateTokenInfo, delegateTokenId, newExpiry); emit ExpiryExtended(delegateTokenId, previousExpiry, newExpiry); return; } revert Errors.NotApproved(msg.sender, delegateTokenId); } /// @inheritdoc IDelegateToken function rescind(uint256 delegateTokenId) external { transferFrom( RegistryHelpers.loadTokenHolder(delegateRegistry, StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId)), IERC721(principalToken).ownerOf(delegateTokenId), delegateTokenId ); } /// @inheritdoc IDelegateToken function withdraw(uint256 delegateTokenId) external nonReentrant { bytes32 registryHash = StorageHelpers.readRegistryHash(delegateTokenInfo, delegateTokenId); StorageHelpers.writeRegistryHash(delegateTokenInfo, delegateTokenId, bytes32(StorageHelpers.ID_USED)); // Sets registry pointer to used flag StorageHelpers.revertNotMinted(registryHash, delegateTokenId); (address delegateTokenHolder, address underlyingContract) = RegistryHelpers.loadTokenHolderAndContract(delegateRegistry, registryHash); StorageHelpers.revertInvalidWithdrawalConditions(delegateTokenInfo, accountOperator, delegateTokenId, delegateTokenHolder); StorageHelpers.decrementBalance(balances, delegateTokenHolder); delete delegateTokenInfo[delegateTokenId][StorageHelpers.PACKED_INFO_POSITION]; // Deletes both expiry and approved emit Transfer(delegateTokenHolder, address(0), delegateTokenId); IDelegateRegistry.DelegationType delegationType = RegistryHashes.decodeType(registryHash); bytes32 underlyingRights = RegistryHelpers.loadRights(delegateRegistry, registryHash); if (delegationType == IDelegateRegistry.DelegationType.ERC721) { uint256 erc721UnderlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash); RegistryHelpers.revokeERC721(delegateRegistry, registryHash, delegateTokenHolder, underlyingContract, erc721UnderlyingTokenId, underlyingRights); StorageHelpers.burnPrincipal(principalToken, principalBurnAuthorization, delegateTokenId); IERC721(underlyingContract).transferFrom(address(this), msg.sender, erc721UnderlyingTokenId); } else if (delegationType == IDelegateRegistry.DelegationType.ERC20) { uint256 erc20UnderlyingAmount = StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId); StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, 0); // Deletes amount RegistryHelpers.decrementERC20(delegateRegistry, registryHash, delegateTokenHolder, underlyingContract, erc20UnderlyingAmount, underlyingRights); StorageHelpers.burnPrincipal(principalToken, principalBurnAuthorization, delegateTokenId); SafeERC20.safeTransfer(IERC20(underlyingContract), msg.sender, erc20UnderlyingAmount); } else if (delegationType == IDelegateRegistry.DelegationType.ERC1155) { uint256 erc1155UnderlyingAmount = StorageHelpers.readUnderlyingAmount(delegateTokenInfo, delegateTokenId); StorageHelpers.writeUnderlyingAmount(delegateTokenInfo, delegateTokenId, 0); // Deletes amount uint256 erc1155UnderlyingTokenId = RegistryHelpers.loadTokenId(delegateRegistry, registryHash); RegistryHelpers.decrementERC1155( delegateRegistry, registryHash, delegateTokenHolder, underlyingContract, erc1155UnderlyingTokenId, erc1155UnderlyingAmount, underlyingRights ); StorageHelpers.burnPrincipal(principalToken, principalBurnAuthorization, delegateTokenId); IERC1155(underlyingContract).safeTransferFrom(address(this), msg.sender, erc1155UnderlyingTokenId, erc1155UnderlyingAmount, ""); } } /// @inheritdoc IDelegateToken function flashloan(Structs.FlashInfo calldata info) external payable nonReentrant { StorageHelpers.revertNotOperator(accountOperator, info.delegateHolder); if (info.tokenType == IDelegateRegistry.DelegationType.ERC721) { RegistryHelpers.revertERC721FlashUnavailable(delegateRegistry, info); IERC721(info.tokenContract).transferFrom(address(this), info.receiver, info.tokenId); Helpers.revertOnCallingInvalidFlashloan(info); TransferHelpers.checkERC721BeforePull(info.amount, info.tokenContract, info.tokenId); TransferHelpers.pullERC721AfterCheck(info.tokenContract, info.tokenId); } else if (info.tokenType == IDelegateRegistry.DelegationType.ERC20) { RegistryHelpers.revertERC20FlashAmountUnavailable(delegateRegistry, info); SafeERC20.safeTransfer(IERC20(info.tokenContract), info.receiver, info.amount); Helpers.revertOnCallingInvalidFlashloan(info); TransferHelpers.checkERC20BeforePull(info.amount, info.tokenContract, info.tokenId); TransferHelpers.pullERC20AfterCheck(info.tokenContract, info.amount); } else if (info.tokenType == IDelegateRegistry.DelegationType.ERC1155) { RegistryHelpers.revertERC1155FlashAmountUnavailable(delegateRegistry, info); TransferHelpers.checkERC1155BeforePull(erc1155PullAuthorization, info.amount); IERC1155(info.tokenContract).safeTransferFrom(address(this), info.receiver, info.tokenId, info.amount, ""); Helpers.revertOnCallingInvalidFlashloan(info); TransferHelpers.pullERC1155AfterCheck(erc1155PullAuthorization, info.amount, info.tokenContract, info.tokenId); } } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.4; import {IERC721Metadata} from "openzeppelin/token/ERC721/extensions/IERC721Metadata.sol"; import {IERC721Receiver} from "openzeppelin/token/ERC721/IERC721Receiver.sol"; import {IERC1155Receiver} from "openzeppelin/token/ERC1155/IERC1155Receiver.sol"; import {IERC2981} from "openzeppelin/interfaces/IERC2981.sol"; import {DelegateTokenStructs as Structs} from "../libraries/DelegateTokenLib.sol"; interface IDelegateToken is IERC721Metadata, IERC721Receiver, IERC1155Receiver, IERC2981 { /*////////////////////////////////////////////////////////////// EVENTS //////////////////////////////////////////////////////////////*/ /** * To prevent doubled event emissions, the latest version of the DelegateToken uses the ERC721 Transfer(from, to, id) event standard to infer meaning that was * previously double covered by "RightsCreated" and "RightsBurned" events * A Transfer event with from = address(0) is a "create" event * A Transfer event with to = address(0) is a "withdraw" event */ /// @notice Emitted when a principal token holder extends the expiry of the delegate token event ExpiryExtended(uint256 indexed delegateTokenId, uint256 previousExpiry, uint256 newExpiry); /*////////////////////////////////////////////////////////////// VIEW & INTROSPECTION //////////////////////////////////////////////////////////////*/ /// @notice The v2 delegate registry address function delegateRegistry() external view returns (address); /// @notice The principal token deployed in tandem with this delegate token function principalToken() external view returns (address); /// @notice The onchain metadata contract for both DT and PT function marketMetadata() external view returns (address); /// @notice Image metadata location, but attributes are stored onchain function baseURI() external view returns (string memory); /// @notice Adapted from solmate's /// [ERC721](https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol) function isApprovedOrOwner(address spender, uint256 delegateTokenId) external view returns (bool); /** * @notice Fetches the info struct of a delegate token * @param delegateTokenId The id of the delegateToken to query info for * @return delegateInfo The DelegateInfo struct */ function getDelegateTokenInfo(uint256 delegateTokenId) external view returns (Structs.DelegateInfo memory delegateInfo); /** * @notice Deterministic function for generating a delegateId. Because msg.sender and freely chosen salt are fixed, no griefing * @param creator The caller of create * @param salt Allows the creation of a new unique id * @return delegateId */ function getDelegateTokenId(address creator, uint256 salt) external view returns (uint256 delegateId); /// @notice Returns contract-level metadata URI for OpenSea /// (reference)[https://docs.opensea.io/docs/contract-level-metadata] function contractURI() external view returns (string memory); /*////////////////////////////////////////////////////////////// STATE CHANGING //////////////////////////////////////////////////////////////*/ /** * @notice Create rights token pair pulling underlying token from `msg.sender` * @param delegateInfo struct containing the details of the delegate token to be created * @param salt A randomly chosen value, never repeated, to generate unique delegateIds for a particular `msg.sender` * @return delegateTokenId New rights ID that is also the token ID of both the newly created principal and delegate tokens. */ function create(Structs.DelegateInfo calldata delegateInfo, uint256 salt) external returns (uint256 delegateTokenId); /** * @notice Allows the principal token owner or any approved operator to extend the expiry of the delegation rights. * @param delegateTokenId The ID of the rights being extended. * @param newExpiry The absolute timestamp to set the expiry */ function extend(uint256 delegateTokenId, uint256 newExpiry) external; /** * @notice Allows the delegate owner or any approved operator to return a delegate token to the principal rights holder early, allowing the principal rights holder to redeem * the underlying token(s) early * @param delegateTokenId Which delegate right to rescind */ function rescind(uint256 delegateTokenId) external; /** * @notice Allows principal rights owner or approved operator to withdraw the underlying token once the delegation rights have either met their expiration or been rescinded. * Can also be called early if the caller is approved or owner of the delegate token (i.e. they wouldn't need to * call rescind & withdraw), or approved operator of the delegate token holder * "Burns" the delegate token, principal token, and returns the underlying tokens to the caller. * @param delegateTokenId id of the corresponding delegate token */ function withdraw(uint256 delegateTokenId) external; /** * @notice Allows delegate token owner or approved operator to borrow their underlying tokens for the duration of a single atomic transaction * @dev At the conclusion of the flashloan transaction, the asset must be held and approved in `msg.sender` address, not `info.receiver` * @param info IDelegateFlashloan FlashInfo struct */ function flashloan(Structs.FlashInfo calldata info) external payable; /// @notice Callback function for principal token during the create flow function burnAuthorizedCallback() external; /// @notice Callback function for principal token during the withdraw flow function mintAuthorizedCallback() external; }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.21; import {DelegateTokenStructs, DelegateTokenErrors} from "./libraries/DelegateTokenLib.sol"; import {IDelegateRegistry} from "delegate-registry/src/IDelegateRegistry.sol"; import {Ownable2Step} from "openzeppelin/access/Ownable2Step.sol"; import {ERC2981} from "openzeppelin/token/common/ERC2981.sol"; import {Base64} from "openzeppelin/utils/Base64.sol"; import {Strings} from "openzeppelin/utils/Strings.sol"; contract MarketMetadata is Ownable2Step, ERC2981 { using Strings for address; using Strings for uint256; string public baseURI; string internal constant DT_NAME = "Delegate Token"; string internal constant PT_NAME = "Principal Token"; string internal constant DT_DESCRIPTION = "The Delegate Marketplace lets you escrow your token for a chosen time period and receive a token representing its delegate rights. These tokens represent tokenized delegate rights."; string internal constant PT_DESCRIPTION = "The Delegate Marketplace lets you escrow your token for a chosen time period and receive a token representing its delegate rights. These tokens represents the right to claim the escrowed spot asset once the delegate token expires."; constructor(address initialOwner, string memory initialBaseURI) { baseURI = initialBaseURI; _transferOwnership(initialOwner); } function setBaseURI(string calldata uri) external onlyOwner { baseURI = uri; } function setDefaultRoyalty(address receiver, uint96 feeNumerator) external onlyOwner { _setDefaultRoyalty(receiver, feeNumerator); } function deleteDefaultRoyalty() external onlyOwner { _deleteDefaultRoyalty(); } function delegateTokenContractURI() external view returns (string memory) { return string.concat(baseURI, "delegateContract"); } function principalTokenContractURI() external view returns (string memory) { return string.concat(baseURI, "principalContract"); } /// @dev Attributes are "collection address", "token id", "expires at", "principal owner address", "delegate status" function delegateTokenURI(uint256 delegateTokenId, DelegateTokenStructs.DelegateInfo calldata info) external view returns (string memory) { string memory imageUrl = string.concat(baseURI, "delegate/", delegateTokenId.toString()); // Split attributes construction into two parts to avoid stack-too-deep string memory attributes1 = string.concat( '[{"trait_type":"Token Type","value":"', _tokenTypeToString(info.tokenType), '"},{"trait_type":"Principal Holder","value":"', info.principalHolder.toHexString(), '"},{"trait_type":"Delegate Holder","value":"', info.delegateHolder.toHexString(), '"},{"trait_type":"Token Contract","value":"', info.tokenContract.toHexString() ); string memory attributes2 = string.concat( '"},{"trait_type":"Token Id","value":"', info.tokenId.toString(), '"},{"trait_type":"Token Amount","display_type":"number","value":', info.amount.toString(), '},{"trait_type":"Rights","value":"', fromSmallString(info.rights), '"},{"trait_type":"Expiry","display_type":"date","value":', info.expiry.toString(), "}]" ); string memory attributes = string.concat(attributes1, attributes2); string memory metadataString = string.concat('{"name": "', DT_NAME, '","description":"', DT_DESCRIPTION, '","image":"', imageUrl, '","attributes":', attributes, "}"); return string.concat("data:application/json;base64,", Base64.encode(bytes(metadataString))); } function principalTokenURI(uint256 delegateTokenId, DelegateTokenStructs.DelegateInfo calldata info) external view returns (string memory) { string memory imageUrl = string.concat(baseURI, "principal/", delegateTokenId.toString()); // Split attributes construction into two parts to avoid stack-too-deep string memory attributes1 = string.concat( '[{"trait_type":"Token Type","value":"', _tokenTypeToString(info.tokenType), '"},{"trait_type":"Principal Holder","value":"', info.principalHolder.toHexString(), '"},{"trait_type":"Delegate Holder","value":"', info.delegateHolder.toHexString(), '"},{"trait_type":"Token Contract","value":"', info.tokenContract.toHexString() ); string memory attributes2 = string.concat( '"},{"trait_type":"Token Id","value":"', info.tokenId.toString(), '"},{"trait_type":"Token Amount","display_type":"number","value":', info.amount.toString(), '},{"trait_type":"Rights","value":"', fromSmallString(info.rights), '"},{"trait_type":"Expiry","display_type":"date","value":', info.expiry.toString(), "}]" ); string memory attributes = string.concat(attributes1, attributes2); string memory metadataString = string.concat('{"name": "', PT_NAME, '","description":"', PT_DESCRIPTION, '","image":"', imageUrl, '","attributes":', attributes, "}"); return string.concat("data:application/json;base64,", Base64.encode(bytes(metadataString))); } function _tokenTypeToString(IDelegateRegistry.DelegationType tokenType) internal pure returns (string memory) { if (tokenType == IDelegateRegistry.DelegationType.ALL) { return "ALL"; } else if (tokenType == IDelegateRegistry.DelegationType.CONTRACT) { return "CONTRACT"; } else if (tokenType == IDelegateRegistry.DelegationType.ERC721) { return "ERC721"; } else if (tokenType == IDelegateRegistry.DelegationType.ERC20) { return "ERC20"; } else if (tokenType == IDelegateRegistry.DelegationType.ERC1155) { return "ERC1155"; } else { revert DelegateTokenErrors.InvalidTokenType(tokenType); } } /// @dev Returns a string from a small bytes32 string. function fromSmallString(bytes32 smallString) internal pure returns (string memory result) { if (smallString == bytes32(0)) return result; /// @solidity memory-safe-assembly assembly { result := mload(0x40) let n for {} 1 {} { n := add(n, 1) if iszero(byte(n, smallString)) { break } // Scan for '\0'. } mstore(result, n) let o := add(result, 0x20) mstore(o, smallString) mstore(add(o, n), 0) mstore(0x40, add(result, 0x40)) } } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.21; import {IDelegateToken} from "./interfaces/IDelegateToken.sol"; import {ERC721} from "openzeppelin-contracts/contracts/token/ERC721/ERC721.sol"; import {IERC2981} from "openzeppelin-contracts/contracts/interfaces/IERC2981.sol"; import {MarketMetadata} from "./MarketMetadata.sol"; /// @notice A simple NFT that doesn't store any user data, being tightly linked to the stateful Delegate Token. /// @notice The holder of the PT is eligible to reclaim the escrowed NFT when the DT expires or is burned. contract PrincipalToken is ERC721("Principal Token", "PT"), IERC2981 { IDelegateToken public immutable delegateToken; error DelegateTokenZero(); error CallerNotDelegateToken(); error NotApproved(address spender, uint256 id); constructor(address _delegateToken) { if (_delegateToken == address(0)) revert DelegateTokenZero(); delegateToken = IDelegateToken(_delegateToken); } function _checkDelegateTokenCaller() internal view { if (msg.sender == address(delegateToken)) return; revert CallerNotDelegateToken(); } /// @notice Mints a PT if and only if the DT contract calls and has authorized function mint(address to, uint256 id) external { _checkDelegateTokenCaller(); _mint(to, id); delegateToken.mintAuthorizedCallback(); } /// @notice Burns a PT if the DT contract authorizes and the spender isApprovedOrOwner and DT owner authorizes function burn(address spender, uint256 id) external { _checkDelegateTokenCaller(); if (_isApprovedOrOwner(spender, id)) { _burn(id); delegateToken.burnAuthorizedCallback(); return; } revert NotApproved(spender, id); } function isApprovedOrOwner(address account, uint256 id) external view returns (bool) { return _isApprovedOrOwner(account, id); } /// @inheritdoc IERC2981 function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount) { (receiver, royaltyAmount) = MarketMetadata(delegateToken.marketMetadata()).royaltyInfo(tokenId, salePrice); } function contractURI() external view returns (string memory) { return MarketMetadata(delegateToken.marketMetadata()).principalTokenContractURI(); } function tokenURI(uint256 id) public view override returns (string memory) { _requireMinted(id); return MarketMetadata(delegateToken.marketMetadata()).principalTokenURI(id, delegateToken.getDelegateTokenInfo(id)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.4; import {IDelegateRegistry} from "delegate-registry/src/IDelegateRegistry.sol"; import {IDelegateFlashloan} from "../interfaces/IDelegateFlashloan.sol"; import {IERC721Receiver} from "openzeppelin/token/ERC721/IERC721Receiver.sol"; library DelegateTokenStructs { struct Uint256 { uint256 flag; } /// @notice Struct for creating delegate tokens and returning their information struct DelegateInfo { address principalHolder; IDelegateRegistry.DelegationType tokenType; address delegateHolder; uint256 amount; address tokenContract; uint256 tokenId; // The id of the underlying escrowed token, not the delegate token bytes32 rights; uint256 expiry; // Expires when block.timestamp >= expiry } struct FlashInfo { address receiver; // The address to receive the loaned assets address delegateHolder; // The holder of the delegation IDelegateRegistry.DelegationType tokenType; // The type of contract, e.g. ERC20 address tokenContract; // The contract of the underlying being loaned uint256 tokenId; // The tokenId of the underlying being loaned, if applicable uint256 amount; // The amount being lent, if applicable bytes data; // Arbitrary data structure, intended to contain user-defined parameters } } library DelegateTokenErrors { error MulticallFailed(); error DelegateTokenHolderZero(); error ToIsZero(); error NotERC721Receiver(); error InvalidERC721TransferOperator(); error ERC1155PullNotRequested(address operator); error BatchERC1155TransferUnsupported(); error InsufficientAllowanceOrInvalidToken(); error CallerNotOwnerOrInvalidToken(); error NotOwner(address caller, address account); error NotOperator(address caller, address account); error NotApproved(address caller, uint256 delegateTokenId); error FromNotDelegateTokenHolder(); error HashMismatch(); error NotMinted(uint256 delegateTokenId); error AlreadyExisted(uint256 delegateTokenId); error WithdrawNotAvailable(uint256 delegateTokenId, uint256 expiry, uint256 timestamp); error ExpiryInPast(); error ExpiryTooLarge(); error ExpiryTooSmall(); error WrongAmountForType(IDelegateRegistry.DelegationType tokenType, uint256 wrongAmount); error WrongTokenIdForType(IDelegateRegistry.DelegationType tokenType, uint256 wrongTokenId); error InvalidTokenType(IDelegateRegistry.DelegationType tokenType); error ERC721FlashUnavailable(); error ERC20FlashAmountUnavailable(); error ERC1155FlashAmountUnavailable(); error BurnNotAuthorized(); error MintNotAuthorized(); error CallerNotPrincipalToken(); error BurnAuthorized(); error MintAuthorized(); error ERC1155Pulled(); error ERC1155NotPulled(); } library DelegateTokenHelpers { function revertOnCallingInvalidFlashloan(DelegateTokenStructs.FlashInfo calldata info) internal { if (IDelegateFlashloan(info.receiver).onFlashloan{value: msg.value}(msg.sender, info) == IDelegateFlashloan.onFlashloan.selector) return; revert IDelegateFlashloan.InvalidFlashloan(); } function revertOnInvalidERC721ReceiverCallback(address from, address to, uint256 delegateTokenId, bytes calldata data) internal { if (to.code.length == 0 || IERC721Receiver(to).onERC721Received(msg.sender, from, delegateTokenId, data) == IERC721Receiver.onERC721Received.selector) return; revert DelegateTokenErrors.NotERC721Receiver(); } function revertOnInvalidERC721ReceiverCallback(address from, address to, uint256 delegateTokenId) internal { if (to.code.length == 0 || IERC721Receiver(to).onERC721Received(msg.sender, from, delegateTokenId, "") == IERC721Receiver.onERC721Received.selector) return; revert DelegateTokenErrors.NotERC721Receiver(); } /// @dev won't revert if expiry is too large (i.e. > type(uint96).max) function revertOldExpiry(uint256 expiry) internal view { //slither-disable-next-line timestamp if (block.timestamp < expiry) return; revert DelegateTokenErrors.ExpiryInPast(); } function delegateIdNoRevert(address caller, uint256 salt) internal pure returns (uint256) { return uint256(keccak256(abi.encode(caller, salt))); } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.4; import {DelegateTokenErrors as Errors, DelegateTokenStructs as Structs} from "./DelegateTokenLib.sol"; import {PrincipalToken} from "../PrincipalToken.sol"; library DelegateTokenStorageHelpers { /// @dev Use this to syntactically store the max of the expiry uint256 internal constant MAX_EXPIRY = type(uint96).max; ///////////// ID Flags ///////////// /// @dev Standardizes registryHash storage flags to prevent double-creation and griefing /// @dev ID_AVAILABLE should be zero since this is the default for a storage slot uint256 internal constant ID_AVAILABLE = 0; uint256 internal constant ID_USED = 1; ///////////// Info positions ///////////// /// @dev Standardizes storage positions of delegateInfo mapping data /// @dev must start at zero and end at 2 uint256 internal constant REGISTRY_HASH_POSITION = 0; uint256 internal constant PACKED_INFO_POSITION = 1; // PACKED (address approved, uint96 expiry) uint256 internal constant UNDERLYING_AMOUNT_POSITION = 2; // Not used by 721 delegations ///////////// Callback Flags ///////////// /// @dev all callback flags should be non zero to reduce storage read / write costs /// @dev all callback flags should be unique /// Principal Token callbacks uint256 internal constant MINT_NOT_AUTHORIZED = 1; uint256 internal constant MINT_AUTHORIZED = 2; uint256 internal constant BURN_NOT_AUTHORIZED = 3; uint256 internal constant BURN_AUTHORIZED = 4; /// @dev should preserve the expiry in the lower 96 bits in storage, and update the upper 160 bits with approved address function writeApproved(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, address approved) internal { uint96 expiry = uint96(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION]); delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] = (uint256(uint160(approved)) << 96) | expiry; } /// @dev should preserve approved in the upper 160 bits, and update the lower 96 bits with expiry /// @dev should revert if expiry exceeds 96 bits function writeExpiry(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, uint256 expiry) internal { if (expiry > MAX_EXPIRY) revert Errors.ExpiryTooLarge(); address approved = address(uint160(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] >> 96)); delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] = (uint256(uint160(approved)) << 96) | expiry; } function writeRegistryHash(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, bytes32 registryHash) internal { delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION] = uint256(registryHash); } function writeUnderlyingAmount(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId, uint256 underlyingAmount) internal { delegateTokenInfo[delegateTokenId][UNDERLYING_AMOUNT_POSITION] = underlyingAmount; } function incrementBalance(mapping(address delegateTokenHolder => uint256 balance) storage balances, address delegateTokenHolder) internal { unchecked { ++balances[delegateTokenHolder]; } // Infeasible that this will overflow } function decrementBalance(mapping(address delegateTokenHolder => uint256 balance) storage balances, address delegateTokenHolder) internal { unchecked { --balances[delegateTokenHolder]; } // Reasonable to expect this not to underflow } /// @notice helper function for burning a principal token /// @dev must revert if burnAuthorized is not set to BURN_NOT_AUTHORIZED flag function burnPrincipal(address principalToken, Structs.Uint256 storage principalBurnAuthorization, uint256 delegateTokenId) internal { if (principalBurnAuthorization.flag == BURN_NOT_AUTHORIZED) { principalBurnAuthorization.flag = BURN_AUTHORIZED; PrincipalToken(principalToken).burn(msg.sender, delegateTokenId); principalBurnAuthorization.flag = BURN_NOT_AUTHORIZED; return; } revert Errors.BurnAuthorized(); } /// @notice helper function for minting a principal token /// @dev must revert if mintAuthorized has already been set to MINT_AUTHORIZED flag function mintPrincipal(address principalToken, Structs.Uint256 storage principalMintAuthorization, address principalRecipient, uint256 delegateTokenId) internal { if (principalMintAuthorization.flag == MINT_NOT_AUTHORIZED) { principalMintAuthorization.flag = MINT_AUTHORIZED; PrincipalToken(principalToken).mint(principalRecipient, delegateTokenId); principalMintAuthorization.flag = MINT_NOT_AUTHORIZED; return; } revert Errors.MintAuthorized(); } /// @dev must revert if delegate token did not call burn on the Principal Token for the delegateTokenId /// @dev must revert if principal token is not the caller function checkBurnAuthorized(address principalToken, Structs.Uint256 storage principalBurnAuthorization) internal view { principalIsCaller(principalToken); if (principalBurnAuthorization.flag == BURN_AUTHORIZED) return; revert Errors.BurnNotAuthorized(); } /// @dev must revert if delegate token did not call burn on the Principal Token for the delegateTokenId /// @dev must revert if principal token is not the caller function checkMintAuthorized(address principalToken, Structs.Uint256 storage principalMintAuthorization) internal view { principalIsCaller(principalToken); if (principalMintAuthorization.flag == MINT_AUTHORIZED) return; revert Errors.MintNotAuthorized(); } /// @notice helper function to revert if caller is not Principal Token /// @dev must revert if msg.sender is not the principal token function principalIsCaller(address principalToken) internal view { if (msg.sender == principalToken) return; revert Errors.CallerNotPrincipalToken(); } function readApproved(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (address) { return address(uint160(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION] >> 96)); } function readExpiry(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (uint256) { return uint96(delegateTokenInfo[delegateTokenId][PACKED_INFO_POSITION]); } function readRegistryHash(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (bytes32) { return bytes32(delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION]); } function readUnderlyingAmount(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view returns (uint256) { return delegateTokenInfo[delegateTokenId][UNDERLYING_AMOUNT_POSITION]; } function revertNotOwner(address account) internal view { if (msg.sender == account) return; revert Errors.NotOwner(msg.sender, account); } function revertNotOperator(mapping(address account => mapping(address operator => bool enabled)) storage accountOperator, address account) internal view { if (msg.sender == account || accountOperator[account][msg.sender]) return; revert Errors.NotOperator(msg.sender, account); } function revertNotApprovedOrOperator( mapping(address account => mapping(address operator => bool enabled)) storage accountOperator, mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, address account, uint256 delegateTokenId ) internal view { if (msg.sender == account || accountOperator[account][msg.sender] || msg.sender == readApproved(delegateTokenInfo, delegateTokenId)) return; revert Errors.NotApproved(msg.sender, delegateTokenId); } /// @dev should only revert if expiry has not expired AND caller is not the delegateTokenHolder AND not approved for the delegateTokenId AND not an operator for /// delegateTokenHolder function revertInvalidWithdrawalConditions( mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, mapping(address account => mapping(address operator => bool enabled)) storage accountOperator, uint256 delegateTokenId, address delegateTokenHolder ) internal view { //slither-disable-next-line timestamp if (block.timestamp < readExpiry(delegateTokenInfo, delegateTokenId)) { if (msg.sender == delegateTokenHolder || accountOperator[delegateTokenHolder][msg.sender] || msg.sender == readApproved(delegateTokenInfo, delegateTokenId)) { return; } revert Errors.WithdrawNotAvailable(delegateTokenId, readExpiry(delegateTokenInfo, delegateTokenId), block.timestamp); } } function revertAlreadyExisted(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view { if (delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION] == ID_AVAILABLE) return; revert Errors.AlreadyExisted(delegateTokenId); } function revertNotMinted(mapping(uint256 delegateTokenId => uint256[3] info) storage delegateTokenInfo, uint256 delegateTokenId) internal view { uint256 registryHash = delegateTokenInfo[delegateTokenId][REGISTRY_HASH_POSITION]; if (registryHash == ID_AVAILABLE || registryHash == ID_USED) { revert Errors.NotMinted(delegateTokenId); } } /// @dev does not read from storage, make sure the registryHash of the corresponding delegateTokenId is passed to have the intended effect function revertNotMinted(bytes32 registryHash, uint256 delegateTokenId) internal pure { if (uint256(registryHash) == ID_AVAILABLE || uint256(registryHash) == ID_USED) { revert Errors.NotMinted(delegateTokenId); } } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.4; import {RegistryStorage} from "delegate-registry/src/libraries/RegistryStorage.sol"; import {RegistryHashes} from "delegate-registry/src/libraries/RegistryHashes.sol"; import {IDelegateRegistry, DelegateTokenErrors as Errors, DelegateTokenStructs as Structs} from "./DelegateTokenLib.sol"; library DelegateTokenRegistryHelpers { /** * @notice Loads a delegateTokenHolder directly from a given registryHash * @param delegateRegistry The address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @return delegateTokenHolder Which is the delegate "to" address corresponding to the registryHash * @dev Will not revert or return address(0) if delegation has been 'revoked' */ function loadTokenHolder(address delegateRegistry, bytes32 registryHash) internal view returns (address delegateTokenHolder) { unchecked { return RegistryStorage.unpackAddress( IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_SECOND_PACKED)) ); } } /** * @notice Loads a underlyingContract directly from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @return underlyingContract Which is the "contract_" address corresponding to the registryHash * @dev Two slots need to be loaded in the registry given the packed configuration, this function should only be used when you don't need "to" or "from" * @dev Will not revert or return address(0) if delegation has been 'revoked` */ function loadContract(address delegateRegistry, bytes32 registryHash) internal view returns (address underlyingContract) { unchecked { uint256 registryLocation = uint256(RegistryHashes.location(registryHash)); //slither-disable-next-line unused-return (,, underlyingContract) = RegistryStorage.unpackAddresses( IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_FIRST_PACKED)), IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_SECOND_PACKED)) ); } } /** * @notice Loads a delegateTokenHolder and a underlyingContract from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @return delegateTokenHolder Which is the delegate "to" address corresponding to the registryHash * @return underlyingContract Which is the "contract_" address corresponding to the registryHash * @dev Two slots need to be loaded from the registry given the packed position * @dev Will not revert or return address(0), address(0) if delegation has been revoked */ function loadTokenHolderAndContract(address delegateRegistry, bytes32 registryHash) internal view returns (address delegateTokenHolder, address underlyingContract) { unchecked { uint256 registryLocation = uint256(RegistryHashes.location(registryHash)); //slither-disable-next-line unused-return (, delegateTokenHolder, underlyingContract) = RegistryStorage.unpackAddresses( IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_FIRST_PACKED)), IDelegateRegistry(delegateRegistry).readSlot(bytes32(registryLocation + RegistryStorage.POSITIONS_SECOND_PACKED)) ); } } /** * @notice Loads the "from" address from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @dev Will not revert if delegation has been revoked or never existed */ function loadFrom(address delegateRegistry, bytes32 registryHash) internal view returns (address) { unchecked { return RegistryStorage.unpackAddress( IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_FIRST_PACKED)) ); } } /** * @notice Loads the "amount" from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for */ function loadAmount(address delegateRegistry, bytes32 registryHash) internal view returns (uint256) { unchecked { return uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_AMOUNT))); } } /** * @notice Loads the "rights" from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @dev Will not return empty or revert if delegation has been revoked */ function loadRights(address delegateRegistry, bytes32 registryHash) internal view returns (bytes32) { unchecked { return IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_RIGHTS)); } } /** * @notice Loads the "tokenId" from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @dev Will not revert or return 0 if delegation has been revoked */ function loadTokenId(address delegateRegistry, bytes32 registryHash) internal view returns (uint256) { unchecked { return uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_TOKEN_ID))); } } /** * @notice Calculates a new decreased value given an "amount" from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @param decreaseAmount The value to decrement "amount" by * @dev Assumes the decreased amount won't underflow with "amount" */ function calculateDecreasedAmount(address delegateRegistry, bytes32 registryHash, uint256 decreaseAmount) internal view returns (uint256) { unchecked { return uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_AMOUNT))) - decreaseAmount; } } /** * @notice Calculates a new increased value given an "amount" from a given registryHash * @param delegateRegistry Address of the DelegateRegistry v2 contract * @param registryHash The hash of the delegation to retrieve data for * @param increaseAmount The value to increment "amount" by * @dev Assumes the increased amount won't overflow with "amount" */ function calculateIncreasedAmount(address delegateRegistry, bytes32 registryHash, uint256 increaseAmount) internal view returns (uint256) { unchecked { return uint256(IDelegateRegistry(delegateRegistry).readSlot(bytes32(uint256(RegistryHashes.location(registryHash)) + RegistryStorage.POSITIONS_AMOUNT))) + increaseAmount; } } function revertERC721FlashUnavailable(address delegateRegistry, Structs.FlashInfo calldata info) internal view { // We touch registry directly to check for active delegation of the respective hash, as bubbling up to contract // and all delegations is not required // Important to notice that we cannot rely on this method for the fungibles since delegate token doesn't ever // delete the fungible delegations if ( loadFrom(delegateRegistry, RegistryHashes.erc721Hash(address(this), "", info.delegateHolder, info.tokenId, info.tokenContract)) == address(this) || loadFrom(delegateRegistry, RegistryHashes.erc721Hash(address(this), "flashloan", info.delegateHolder, info.tokenId, info.tokenContract)) == address(this) ) return; revert Errors.ERC721FlashUnavailable(); } function revertERC20FlashAmountUnavailable(address delegateRegistry, Structs.FlashInfo calldata info) internal view { uint256 availableAmount = 0; unchecked { // We sum the delegation amounts for "flashloan" and "" rights since liquid delegate doesn't allow double spends for different rights availableAmount = loadAmount(delegateRegistry, RegistryHashes.erc20Hash(address(this), "flashloan", info.delegateHolder, info.tokenContract)) + loadAmount(delegateRegistry, RegistryHashes.erc20Hash(address(this), "", info.delegateHolder, info.tokenContract)); } // Unreasonable that this block will overflow if (info.amount > availableAmount) revert Errors.ERC20FlashAmountUnavailable(); } function revertERC1155FlashAmountUnavailable(address delegateRegistry, Structs.FlashInfo calldata info) internal view { uint256 availableAmount = 0; unchecked { availableAmount = loadAmount(delegateRegistry, RegistryHashes.erc1155Hash(address(this), "flashloan", info.delegateHolder, info.tokenId, info.tokenContract)) + loadAmount(delegateRegistry, RegistryHashes.erc1155Hash(address(this), "", info.delegateHolder, info.tokenId, info.tokenContract)); } // Unreasonable that this block will overflow if (info.amount > availableAmount) { revert Errors.ERC1155FlashAmountUnavailable(); } } /// @dev Will not revert if from didn't have a delegation in the first place function transferERC721( address delegateRegistry, bytes32 registryHash, address from, bytes32 newRegistryHash, address to, bytes32 underlyingRights, address underlyingContract, uint256 underlyingTokenId ) internal { if ( IDelegateRegistry(delegateRegistry).delegateERC721(from, underlyingContract, underlyingTokenId, underlyingRights, false) == registryHash && IDelegateRegistry(delegateRegistry).delegateERC721(to, underlyingContract, underlyingTokenId, underlyingRights, true) == newRegistryHash ) return; revert Errors.HashMismatch(); } /// @dev Will not revert if from didn't have a delegation in the first place /// @dev Will not revert an underflow value if from's existing delegation amount > underlyingAmount /// @dev Will not revert an overflow value if to's existing delegation + underlyingAmount > type(uint256).max function transferERC20( address delegateRegistry, bytes32 registryHash, address from, bytes32 newRegistryHash, address to, uint256 underlyingAmount, bytes32 underlyingRights, address underlyingContract ) internal { if ( IDelegateRegistry(delegateRegistry).delegateERC20( from, underlyingContract, underlyingRights, calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount) ) == bytes32(registryHash) && IDelegateRegistry(delegateRegistry).delegateERC20( to, underlyingContract, underlyingRights, calculateIncreasedAmount(delegateRegistry, newRegistryHash, underlyingAmount) ) == newRegistryHash ) return; revert Errors.HashMismatch(); } /// @dev Will not revert if from didn't have a delegation in the first place /// @dev Will not revert an underflow value if from's existing delegation amount > underlyingAmount /// @dev Will not revert an overflowed value if to's existing delegation + underlyingAmount > type(uint256).max function transferERC1155( address delegateRegistry, bytes32 registryHash, address from, bytes32 newRegistryHash, address to, uint256 underlyingAmount, bytes32 underlyingRights, address underlyingContract, uint256 underlyingTokenId ) internal { uint256 amount = calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount); if (IDelegateRegistry(delegateRegistry).delegateERC1155(from, underlyingContract, underlyingTokenId, underlyingRights, amount) != registryHash) { revert Errors.HashMismatch(); } amount = calculateIncreasedAmount(delegateRegistry, newRegistryHash, underlyingAmount); if (IDelegateRegistry(delegateRegistry).delegateERC1155(to, underlyingContract, underlyingTokenId, underlyingRights, amount) != newRegistryHash) { revert Errors.HashMismatch(); } } /// @dev Will not revert if delegateHolder had a delegation in the first place function delegateERC721(address delegateRegistry, bytes32 newRegistryHash, Structs.DelegateInfo calldata delegateInfo) internal { if ( IDelegateRegistry(delegateRegistry).delegateERC721(delegateInfo.delegateHolder, delegateInfo.tokenContract, delegateInfo.tokenId, delegateInfo.rights, true) == newRegistryHash ) return; revert Errors.HashMismatch(); } /// @dev Will not revert if delegateHolder had a delegation in the first place /// @dev Will not revert an overflow value if delegateHolder's existing delegation + amount > type(uint256).max function incrementERC20(address delegateRegistry, bytes32 newRegistryHash, Structs.DelegateInfo calldata delegateInfo) internal { if ( IDelegateRegistry(delegateRegistry).delegateERC20( delegateInfo.delegateHolder, delegateInfo.tokenContract, delegateInfo.rights, calculateIncreasedAmount(delegateRegistry, newRegistryHash, delegateInfo.amount) ) == newRegistryHash ) return; revert Errors.HashMismatch(); } /// @dev Will not revert if delegateHolder had a delegation in the first place /// @dev Will not revert an overflow value if delegateHolder's existing delegation + amount > type(uint256).max function incrementERC1155(address delegateRegistry, bytes32 newRegistryHash, Structs.DelegateInfo calldata delegateInfo) internal { if ( IDelegateRegistry(delegateRegistry).delegateERC1155( delegateInfo.delegateHolder, delegateInfo.tokenContract, delegateInfo.tokenId, delegateInfo.rights, calculateIncreasedAmount(delegateRegistry, newRegistryHash, delegateInfo.amount) ) == newRegistryHash ) return; revert Errors.HashMismatch(); } /// @dev Will not revert if delegateHolder never had a delegation in the first place function revokeERC721( address delegateRegistry, bytes32 registryHash, address delegateTokenHolder, address underlyingContract, uint256 underlyingTokenId, bytes32 underlyingRights ) internal { if (IDelegateRegistry(delegateRegistry).delegateERC721(delegateTokenHolder, underlyingContract, underlyingTokenId, underlyingRights, false) == registryHash) { return; } revert Errors.HashMismatch(); } /// @dev Will not revert if delegateHolder never had a delegation in the first place /// @dev Will not revert an underflow value if delegateHolder's existing delegation - underlyingAmount < 0 function decrementERC20( address delegateRegistry, bytes32 registryHash, address delegateTokenHolder, address underlyingContract, uint256 underlyingAmount, bytes32 underlyingRights ) internal { if ( IDelegateRegistry(delegateRegistry).delegateERC20( delegateTokenHolder, underlyingContract, underlyingRights, calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount) ) == registryHash ) return; revert Errors.HashMismatch(); } /// @dev Will not revert if delegateHolder never had a delegation in the first place /// @dev Will not revert an underflow value if delegateHolder's existing delegation - underlyingAmount < 0 function decrementERC1155( address delegateRegistry, bytes32 registryHash, address delegateTokenHolder, address underlyingContract, uint256 underlyingTokenId, uint256 underlyingAmount, bytes32 underlyingRights ) internal { if ( IDelegateRegistry(delegateRegistry).delegateERC1155( delegateTokenHolder, underlyingContract, underlyingTokenId, underlyingRights, calculateDecreasedAmount(delegateRegistry, registryHash, underlyingAmount) ) == registryHash ) return; revert Errors.HashMismatch(); } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.4; import {IDelegateRegistry, DelegateTokenErrors as Errors, DelegateTokenStructs as Structs} from "./DelegateTokenLib.sol"; import {IERC1155} from "openzeppelin/token/ERC1155/IERC1155.sol"; import {IERC721} from "openzeppelin/token/ERC721/IERC721.sol"; import {IERC20} from "openzeppelin/token/ERC20/IERC20.sol"; import {SafeERC20} from "openzeppelin/token/ERC20/utils/SafeERC20.sol"; library DelegateTokenTransferHelpers { /// 1155 callbacks uint256 internal constant ERC1155_NOT_PULLED = 5; uint256 internal constant ERC1155_PULLED = 6; /// @dev Pulls assets into escrow, and reverts if delegation type is not ERC20/721/1155 function pullAssetsAndCheckType(Structs.Uint256 storage erc1155Pulled, Structs.DelegateInfo calldata delegateInfo) internal { if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC721) { checkERC721BeforePull(delegateInfo.amount, delegateInfo.tokenContract, delegateInfo.tokenId); pullERC721AfterCheck(delegateInfo.tokenContract, delegateInfo.tokenId); } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC20) { checkERC20BeforePull(delegateInfo.amount, delegateInfo.tokenContract, delegateInfo.tokenId); pullERC20AfterCheck(delegateInfo.tokenContract, delegateInfo.amount); } else if (delegateInfo.tokenType == IDelegateRegistry.DelegationType.ERC1155) { checkERC1155BeforePull(erc1155Pulled, delegateInfo.amount); pullERC1155AfterCheck(erc1155Pulled, delegateInfo.amount, delegateInfo.tokenContract, delegateInfo.tokenId); } else { revert Errors.InvalidTokenType(delegateInfo.tokenType); } } /// @dev Should revert for a typical 20 / 1155, and pass for a typical 721 function checkERC721BeforePull(uint256 underlyingAmount, address underlyingContract, uint256 underlyingTokenId) internal view { if (underlyingAmount != 0) { revert Errors.WrongAmountForType(IDelegateRegistry.DelegationType.ERC721, underlyingAmount); } if (IERC721(underlyingContract).ownerOf(underlyingTokenId) != msg.sender) { revert Errors.CallerNotOwnerOrInvalidToken(); } } function pullERC721AfterCheck(address underlyingContract, uint256 underlyingTokenId) internal { IERC721(underlyingContract).transferFrom(msg.sender, address(this), underlyingTokenId); } /// @dev Should revert for a typical 721 / 1155 and pass for a typical 20 function checkERC20BeforePull(uint256 underlyingAmount, address underlyingContract, uint256 underlyingTokenId) internal view { if (underlyingTokenId != 0) { revert Errors.WrongTokenIdForType(IDelegateRegistry.DelegationType.ERC20, underlyingTokenId); } if (underlyingAmount == 0) { revert Errors.WrongAmountForType(IDelegateRegistry.DelegationType.ERC20, underlyingAmount); } if (IERC20(underlyingContract).allowance(msg.sender, address(this)) < underlyingAmount) { revert Errors.InsufficientAllowanceOrInvalidToken(); } } function pullERC20AfterCheck(address underlyingContract, uint256 pullAmount) internal { SafeERC20.safeTransferFrom(IERC20(underlyingContract), msg.sender, address(this), pullAmount); } function checkERC1155BeforePull(Structs.Uint256 storage erc1155Pulled, uint256 pullAmount) internal { if (pullAmount == 0) revert Errors.WrongAmountForType(IDelegateRegistry.DelegationType.ERC1155, pullAmount); if (erc1155Pulled.flag == ERC1155_NOT_PULLED) { erc1155Pulled.flag = ERC1155_PULLED; } else { revert Errors.ERC1155Pulled(); } } function pullERC1155AfterCheck(Structs.Uint256 storage erc1155Pulled, uint256 pullAmount, address underlyingContract, uint256 underlyingTokenId) internal { IERC1155(underlyingContract).safeTransferFrom(msg.sender, address(this), underlyingTokenId, pullAmount, ""); if (erc1155Pulled.flag == ERC1155_PULLED) { revert Errors.ERC1155NotPulled(); } } function checkERC1155Pulled(Structs.Uint256 storage erc1155Pulled, address operator) internal returns (bool) { if (erc1155Pulled.flag == ERC1155_PULLED && address(this) == operator) { erc1155Pulled.flag = ERC1155_NOT_PULLED; return true; } return false; } function revertInvalidERC1155PullCheck(Structs.Uint256 storage erc1155PullAuthorization, address operator) internal { if (!checkERC1155Pulled(erc1155PullAuthorization, operator)) revert Errors.ERC1155PullNotRequested(operator); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev _Available since v3.1._ */ interface IERC1155Receiver is IERC165 { /** * @dev Handles the receipt of a single ERC1155 token type. This function is * called at the end of a `safeTransferFrom` after the balance has been updated. * * NOTE: To accept the transfer, this must return * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` * (i.e. 0xf23a6e61, or its own function selector). * * @param operator The address which initiated the transfer (i.e. msg.sender) * @param from The address which previously owned the token * @param id The ID of the token being transferred * @param value The amount of tokens being transferred * @param data Additional data with no specified format * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed */ function onERC1155Received( address operator, address from, uint256 id, uint256 value, bytes calldata data ) external returns (bytes4); /** * @dev Handles the receipt of a multiple ERC1155 token types. This function * is called at the end of a `safeBatchTransferFrom` after the balances have * been updated. * * NOTE: To accept the transfer(s), this must return * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` * (i.e. 0xbc197c81, or its own function selector). * * @param operator The address which initiated the batch transfer (i.e. msg.sender) * @param from The address which previously owned the token * @param ids An array containing ids of each token being transferred (order and length must match values array) * @param values An array containing amounts of each token being transferred (order and length must match ids array) * @param data Additional data with no specified format * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed */ function onERC1155BatchReceived( address operator, address from, uint256[] calldata ids, uint256[] calldata values, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC2981.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165.sol"; /** * @dev Interface for the NFT Royalty Standard. * * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal * support for royalty payments across all NFT marketplaces and ecosystem participants. * * _Available since v4.5._ */ interface IERC2981 is IERC165 { /** * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of * exchange. The royalty amount is denominated and should be paid in that same unit of exchange. */ function royaltyInfo( uint256 tokenId, uint256 salePrice ) external view returns (address receiver, uint256 royaltyAmount); }
// SPDX-License-Identifier: CC0-1.0 pragma solidity >=0.8.13; /** * @title IDelegateRegistry * @custom:version 2.0 * @custom:author foobar (0xfoobar) * @notice A standalone immutable registry storing delegated permissions from one address to another */ interface IDelegateRegistry { /// @notice Delegation type, NONE is used when a delegation does not exist or is revoked enum DelegationType { NONE, ALL, CONTRACT, ERC721, ERC20, ERC1155 } /// @notice Struct for returning delegations struct Delegation { DelegationType type_; address to; address from; bytes32 rights; address contract_; uint256 tokenId; uint256 amount; } /// @notice Emitted when an address delegates or revokes rights for their entire wallet event DelegateAll(address indexed from, address indexed to, bytes32 rights, bool enable); /// @notice Emitted when an address delegates or revokes rights for a contract address event DelegateContract(address indexed from, address indexed to, address indexed contract_, bytes32 rights, bool enable); /// @notice Emitted when an address delegates or revokes rights for an ERC721 tokenId event DelegateERC721(address indexed from, address indexed to, address indexed contract_, uint256 tokenId, bytes32 rights, bool enable); /// @notice Emitted when an address delegates or revokes rights for an amount of ERC20 tokens event DelegateERC20(address indexed from, address indexed to, address indexed contract_, bytes32 rights, uint256 amount); /// @notice Emitted when an address delegates or revokes rights for an amount of an ERC1155 tokenId event DelegateERC1155(address indexed from, address indexed to, address indexed contract_, uint256 tokenId, bytes32 rights, uint256 amount); /// @notice Thrown if multicall calldata is malformed error MulticallFailed(); /** * ----------- WRITE ----------- */ /** * @notice Call multiple functions in the current contract and return the data from all of them if they all succeed * @param data The encoded function data for each of the calls to make to this contract * @return results The results from each of the calls passed in via data */ function multicall(bytes[] calldata data) external payable returns (bytes[] memory results); /** * @notice Allow the delegate to act on behalf of `msg.sender` for all contracts * @param to The address to act as delegate * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights * @param enable Whether to enable or disable this delegation, true delegates and false revokes * @return delegationHash The unique identifier of the delegation */ function delegateAll(address to, bytes32 rights, bool enable) external payable returns (bytes32 delegationHash); /** * @notice Allow the delegate to act on behalf of `msg.sender` for a specific contract * @param to The address to act as delegate * @param contract_ The contract whose rights are being delegated * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights * @param enable Whether to enable or disable this delegation, true delegates and false revokes * @return delegationHash The unique identifier of the delegation */ function delegateContract(address to, address contract_, bytes32 rights, bool enable) external payable returns (bytes32 delegationHash); /** * @notice Allow the delegate to act on behalf of `msg.sender` for a specific ERC721 token * @param to The address to act as delegate * @param contract_ The contract whose rights are being delegated * @param tokenId The token id to delegate * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights * @param enable Whether to enable or disable this delegation, true delegates and false revokes * @return delegationHash The unique identifier of the delegation */ function delegateERC721(address to, address contract_, uint256 tokenId, bytes32 rights, bool enable) external payable returns (bytes32 delegationHash); /** * @notice Allow the delegate to act on behalf of `msg.sender` for a specific amount of ERC20 tokens * @dev The actual amount is not encoded in the hash, just the existence of a amount (since it is an upper bound) * @param to The address to act as delegate * @param contract_ The address for the fungible token contract * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights * @param amount The amount to delegate, > 0 delegates and 0 revokes * @return delegationHash The unique identifier of the delegation */ function delegateERC20(address to, address contract_, bytes32 rights, uint256 amount) external payable returns (bytes32 delegationHash); /** * @notice Allow the delegate to act on behalf of `msg.sender` for a specific amount of ERC1155 tokens * @dev The actual amount is not encoded in the hash, just the existence of a amount (since it is an upper bound) * @param to The address to act as delegate * @param contract_ The address of the contract that holds the token * @param tokenId The token id to delegate * @param rights Specific subdelegation rights granted to the delegate, pass an empty bytestring to encompass all rights * @param amount The amount of that token id to delegate, > 0 delegates and 0 revokes * @return delegationHash The unique identifier of the delegation */ function delegateERC1155(address to, address contract_, uint256 tokenId, bytes32 rights, uint256 amount) external payable returns (bytes32 delegationHash); /** * ----------- CHECKS ----------- */ /** * @notice Check if `to` is a delegate of `from` for the entire wallet * @param to The potential delegate address * @param from The potential address who delegated rights * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only * @return valid Whether delegate is granted to act on the from's behalf */ function checkDelegateForAll(address to, address from, bytes32 rights) external view returns (bool); /** * @notice Check if `to` is a delegate of `from` for the specified `contract_` or the entire wallet * @param to The delegated address to check * @param contract_ The specific contract address being checked * @param from The cold wallet who issued the delegation * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only * @return valid Whether delegate is granted to act on from's behalf for entire wallet or that specific contract */ function checkDelegateForContract(address to, address from, address contract_, bytes32 rights) external view returns (bool); /** * @notice Check if `to` is a delegate of `from` for the specific `contract` and `tokenId`, the entire `contract_`, or the entire wallet * @param to The delegated address to check * @param contract_ The specific contract address being checked * @param tokenId The token id for the token to delegating * @param from The wallet that issued the delegation * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only * @return valid Whether delegate is granted to act on from's behalf for entire wallet, that contract, or that specific tokenId */ function checkDelegateForERC721(address to, address from, address contract_, uint256 tokenId, bytes32 rights) external view returns (bool); /** * @notice Returns the amount of ERC20 tokens the delegate is granted rights to act on the behalf of * @param to The delegated address to check * @param contract_ The address of the token contract * @param from The cold wallet who issued the delegation * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only * @return balance The delegated balance, which will be 0 if the delegation does not exist */ function checkDelegateForERC20(address to, address from, address contract_, bytes32 rights) external view returns (uint256); /** * @notice Returns the amount of a ERC1155 tokens the delegate is granted rights to act on the behalf of * @param to The delegated address to check * @param contract_ The address of the token contract * @param tokenId The token id to check the delegated amount of * @param from The cold wallet who issued the delegation * @param rights Specific rights to check for, pass the zero value to ignore subdelegations and check full delegations only * @return balance The delegated balance, which will be 0 if the delegation does not exist */ function checkDelegateForERC1155(address to, address from, address contract_, uint256 tokenId, bytes32 rights) external view returns (uint256); /** * ----------- ENUMERATIONS ----------- */ /** * @notice Returns all enabled delegations a given delegate has received * @param to The address to retrieve delegations for * @return delegations Array of Delegation structs */ function getIncomingDelegations(address to) external view returns (Delegation[] memory delegations); /** * @notice Returns all enabled delegations an address has given out * @param from The address to retrieve delegations for * @return delegations Array of Delegation structs */ function getOutgoingDelegations(address from) external view returns (Delegation[] memory delegations); /** * @notice Returns all hashes associated with enabled delegations an address has received * @param to The address to retrieve incoming delegation hashes for * @return delegationHashes Array of delegation hashes */ function getIncomingDelegationHashes(address to) external view returns (bytes32[] memory delegationHashes); /** * @notice Returns all hashes associated with enabled delegations an address has given out * @param from The address to retrieve outgoing delegation hashes for * @return delegationHashes Array of delegation hashes */ function getOutgoingDelegationHashes(address from) external view returns (bytes32[] memory delegationHashes); /** * @notice Returns the delegations for a given array of delegation hashes * @param delegationHashes is an array of hashes that correspond to delegations * @return delegations Array of Delegation structs, return empty structs for nonexistent or revoked delegations */ function getDelegationsFromHashes(bytes32[] calldata delegationHashes) external view returns (Delegation[] memory delegations); /** * ----------- STORAGE ACCESS ----------- */ /** * @notice allows external contract to read arbitrary storage slot */ function readSlot(bytes32 location) external view returns (bytes32); /** * @notice allows external contracts to read an arbitrary array of storage slots */ function readSlots(bytes32[] calldata locations) external view returns (bytes32[] memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol) pragma solidity ^0.8.0; import "./Ownable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2Step is Ownable { address private _pendingOwner; event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { return _pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { _pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { delete _pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() public virtual { address sender = _msgSender(); require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner"); _transferOwnership(sender); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/common/ERC2981.sol) pragma solidity ^0.8.0; import "../../interfaces/IERC2981.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information. * * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first. * * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the * fee is specified in basis points by default. * * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported. * * _Available since v4.5._ */ abstract contract ERC2981 is IERC2981, ERC165 { struct RoyaltyInfo { address receiver; uint96 royaltyFraction; } RoyaltyInfo private _defaultRoyaltyInfo; mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) { return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId); } /** * @inheritdoc IERC2981 */ function royaltyInfo(uint256 tokenId, uint256 salePrice) public view virtual override returns (address, uint256) { RoyaltyInfo memory royalty = _tokenRoyaltyInfo[tokenId]; if (royalty.receiver == address(0)) { royalty = _defaultRoyaltyInfo; } uint256 royaltyAmount = (salePrice * royalty.royaltyFraction) / _feeDenominator(); return (royalty.receiver, royaltyAmount); } /** * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an * override. */ function _feeDenominator() internal pure virtual returns (uint96) { return 10000; } /** * @dev Sets the royalty information that all ids in this contract will default to. * * Requirements: * * - `receiver` cannot be the zero address. * - `feeNumerator` cannot be greater than the fee denominator. */ function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual { require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice"); require(receiver != address(0), "ERC2981: invalid receiver"); _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator); } /** * @dev Removes default royalty information. */ function _deleteDefaultRoyalty() internal virtual { delete _defaultRoyaltyInfo; } /** * @dev Sets the royalty information for a specific token id, overriding the global default. * * Requirements: * * - `receiver` cannot be the zero address. * - `feeNumerator` cannot be greater than the fee denominator. */ function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual { require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice"); require(receiver != address(0), "ERC2981: Invalid parameters"); _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator); } /** * @dev Resets royalty information for the token id back to the global default. */ function _resetTokenRoyalty(uint256 tokenId) internal virtual { delete _tokenRoyaltyInfo[tokenId]; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol) pragma solidity ^0.8.0; /** * @dev Provides a set of functions to operate with Base64 strings. * * _Available since v4.5._ */ library Base64 { /** * @dev Base64 Encoding/Decoding Table */ string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; /** * @dev Converts a `bytes` to its Bytes64 `string` representation. */ function encode(bytes memory data) internal pure returns (string memory) { /** * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol */ if (data.length == 0) return ""; // Loads the table into memory string memory table = _TABLE; // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter // and split into 4 numbers of 6 bits. // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up // - `data.length + 2` -> Round up // - `/ 3` -> Number of 3-bytes chunks // - `4 *` -> 4 characters for each chunk string memory result = new string(4 * ((data.length + 2) / 3)); /// @solidity memory-safe-assembly assembly { // Prepare the lookup table (skip the first "length" byte) let tablePtr := add(table, 1) // Prepare result pointer, jump over length let resultPtr := add(result, 32) // Run over the input, 3 bytes at a time for { let dataPtr := data let endPtr := add(data, mload(data)) } lt(dataPtr, endPtr) { } { // Advance 3 bytes dataPtr := add(dataPtr, 3) let input := mload(dataPtr) // To write each character, shift the 3 bytes (18 bits) chunk // 4 times in blocks of 6 bits for each character (18, 12, 6, 0) // and apply logical AND with 0x3F which is the number of // the previous character in the ASCII table prior to the Base64 Table // The result is then added to the table to get the character to write, // and finally write it in the result pointer but with a left shift // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F)))) resultPtr := add(resultPtr, 1) // Advance mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F)))) resultPtr := add(resultPtr, 1) // Advance } // When data `bytes` is not exactly 3 bytes long // it is padded with `=` characters at the end switch mod(mload(data), 3) case 1 { mstore8(sub(resultPtr, 1), 0x3d) mstore8(sub(resultPtr, 2), 0x3d) } case 2 { mstore8(sub(resultPtr, 1), 0x3d) } } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.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 `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @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); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: address zero is not a valid owner"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _ownerOf(tokenId); require(owner != address(0), "ERC721: invalid token ID"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { _requireMinted(tokenId); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not token owner or approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { _requireMinted(tokenId); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom(address from, address to, uint256 tokenId) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved"); _safeTransfer(from, to, tokenId, data); } /** * @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. * * `data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist */ function _ownerOf(uint256 tokenId) internal view virtual returns (address) { return _owners[tokenId]; } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _ownerOf(tokenId) != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { address owner = ERC721.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId, 1); // Check that tokenId was not minted by `_beforeTokenTransfer` hook require(!_exists(tokenId), "ERC721: token already minted"); unchecked { // Will not overflow unless all 2**256 token ids are minted to the same owner. // Given that tokens are minted one by one, it is impossible in practice that // this ever happens. Might change if we allow batch minting. // The ERC fails to describe this case. _balances[to] += 1; } _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId, 1); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * This is an internal function that does not check if the sender is authorized to operate on the token. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId, 1); // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook owner = ERC721.ownerOf(tokenId); // Clear approvals delete _tokenApprovals[tokenId]; unchecked { // Cannot overflow, as that would require more tokens to be burned/transferred // out than the owner initially received through minting and transferring in. _balances[owner] -= 1; } delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), tokenId, 1); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer(address from, address to, uint256 tokenId) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId, 1); // Check that tokenId was not transferred by `_beforeTokenTransfer` hook require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); // Clear approvals from the previous owner delete _tokenApprovals[tokenId]; unchecked { // `_balances[from]` cannot overflow for the same reason as described in `_burn`: // `from`'s balance is the number of token held, which is at least one before the current // transfer. // `_balances[to]` could overflow in the conditions described in `_mint`. That would require // all 2**256 token ids to be minted, which in practice is impossible. _balances[from] -= 1; _balances[to] += 1; } _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId, 1); } /** * @dev Approve `to` to operate on `tokenId` * * Emits an {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits an {ApprovalForAll} event. */ function _setApprovalForAll(address owner, address operator, bool approved) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Reverts if the `tokenId` has not been minted yet. */ function _requireMinted(uint256 tokenId) internal view virtual { require(_exists(tokenId), "ERC721: invalid token ID"); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { /// @solidity memory-safe-assembly assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`. * - When `from` is zero, the tokens will be minted for `to`. * - When `to` is zero, ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * - `batchSize` is non-zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {} /** * @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`. * - When `from` is zero, the tokens were minted for `to`. * - When `to` is zero, ``from``'s tokens were burned. * - `from` and `to` are never both zero. * - `batchSize` is non-zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {} /** * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override. * * WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant * being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such * that `ownerOf(tokenId)` is `a`. */ // solhint-disable-next-line func-name-mixedcase function __unsafe_increaseBalance(address account, uint256 amount) internal { _balances[account] += amount; } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.4; import {DelegateTokenStructs as Structs} from "../libraries/DelegateTokenLib.sol"; interface IDelegateFlashloan { error InvalidFlashloan(); /** * @dev Receive a delegate flashloan * @param initiator Caller of the flashloan * @param flashInfo Info about the flashloan * @return selector The function selector for onFlashloan */ function onFlashloan(address initiator, Structs.FlashInfo calldata flashInfo) external payable returns (bytes32); }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.21; library RegistryStorage { /// @dev Standardizes from storage flags to prevent double-writes in the delegation in/outbox if the same delegation is revoked and rewritten address internal constant DELEGATION_EMPTY = address(0); address internal constant DELEGATION_REVOKED = address(1); /// @dev Standardizes storage positions of delegation data uint256 internal constant POSITIONS_FIRST_PACKED = 0; // | 4 bytes empty | first 8 bytes of contract address | 20 bytes of from address | uint256 internal constant POSITIONS_SECOND_PACKED = 1; // | last 12 bytes of contract address | 20 bytes of to address | uint256 internal constant POSITIONS_RIGHTS = 2; uint256 internal constant POSITIONS_TOKEN_ID = 3; uint256 internal constant POSITIONS_AMOUNT = 4; /// @dev Used to clean address types of dirty bits with and(address, CLEAN_ADDRESS) uint256 internal constant CLEAN_ADDRESS = 0x00ffffffffffffffffffffffffffffffffffffffff; /// @dev Used to clean everything but the first 8 bytes of an address uint256 internal constant CLEAN_FIRST8_BYTES_ADDRESS = 0xffffffffffffffff << 96; /// @dev Used to clean everything but the first 8 bytes of an address in the packed position uint256 internal constant CLEAN_PACKED8_BYTES_ADDRESS = 0xffffffffffffffff << 160; /** * @notice Helper function that packs from, to, and contract_ address to into the two slot configuration * @param from The address making the delegation * @param to The address receiving the delegation * @param contract_ The contract address associated with the delegation (optional) * @return firstPacked The firstPacked storage configured with the parameters * @return secondPacked The secondPacked storage configured with the parameters * @dev Will not revert if from, to, and contract_ are > uint160, any inputs with dirty bits outside the last 20 bytes will be cleaned */ function packAddresses(address from, address to, address contract_) internal pure returns (bytes32 firstPacked, bytes32 secondPacked) { assembly { firstPacked := or(shl(64, and(contract_, CLEAN_FIRST8_BYTES_ADDRESS)), and(from, CLEAN_ADDRESS)) secondPacked := or(shl(160, contract_), and(to, CLEAN_ADDRESS)) } } /** * @notice Helper function that unpacks from, to, and contract_ address inside the firstPacked secondPacked storage configuration * @param firstPacked The firstPacked storage to be decoded * @param secondPacked The secondPacked storage to be decoded * @return from The address making the delegation * @return to The address receiving the delegation * @return contract_ The contract address associated with the delegation * @dev Will not revert if from, to, and contract_ are > uint160, any inputs with dirty bits outside the last 20 bytes will be cleaned */ function unpackAddresses(bytes32 firstPacked, bytes32 secondPacked) internal pure returns (address from, address to, address contract_) { assembly { from := and(firstPacked, CLEAN_ADDRESS) to := and(secondPacked, CLEAN_ADDRESS) contract_ := or(shr(64, and(firstPacked, CLEAN_PACKED8_BYTES_ADDRESS)), shr(160, secondPacked)) } } /** * @notice Helper function that can unpack the from or to address from their respective packed slots in the registry * @param packedSlot The slot containing the from or to address * @return unpacked The `from` or `to` address * @dev Will not work if you want to obtain the contract address, use unpackAddresses */ function unpackAddress(bytes32 packedSlot) internal pure returns (address unpacked) { assembly { unpacked := and(packedSlot, CLEAN_ADDRESS) } } }
// SPDX-License-Identifier: CC0-1.0 pragma solidity ^0.8.21; import {IDelegateRegistry} from "../IDelegateRegistry.sol"; /** * @title Library for calculating the hashes and storage locations used in the delegate registry * * The encoding for the 5 types of delegate registry hashes should be as follows * * ALL: keccak256(abi.encodePacked(rights, from, to)) * CONTRACT: keccak256(abi.encodePacked(rights, from, to, contract_)) * ERC721: keccak256(abi.encodePacked(rights, from, to, contract_, tokenId)) * ERC20: keccak256(abi.encodePacked(rights, from, to, contract_)) * ERC1155: keccak256(abi.encodePacked(rights, from, to, contract_, tokenId)) * * To avoid collisions between the hashes with respect to type, the hash is shifted left by one byte and the last byte is then encoded with a unique number for the * delegation type. * */ library RegistryHashes { /// @dev Used to delete everything but the last byte of a 32 byte word with and(word, EXTRACT_LAST_BYTE) uint256 internal constant EXTRACT_LAST_BYTE = 0xff; /// @dev uint256 constant for the delegate registry delegation type enumeration, related unit test should fail if these mismatch uint256 internal constant ALL_TYPE = 1; uint256 internal constant CONTRACT_TYPE = 2; uint256 internal constant ERC721_TYPE = 3; uint256 internal constant ERC20_TYPE = 4; uint256 internal constant ERC1155_TYPE = 5; /// @dev uint256 constant for the location of the delegations array in the delegate registry, assumed to be zero uint256 internal constant DELEGATION_SLOT = 0; /** * @notice Helper function to decode last byte of a delegation hash to obtain its delegation type * @param inputHash to decode the type from * @return decodedType of the delegation * @dev function itself will not revert if decodedType > type(IDelegateRegistry.DelegationType).max * @dev may lead to a revert with Conversion into non-existent enum type after the function is called if inputHash was encoded with type outside the DelegationType * enum range */ function decodeType(bytes32 inputHash) internal pure returns (IDelegateRegistry.DelegationType decodedType) { assembly { decodedType := and(inputHash, EXTRACT_LAST_BYTE) } } /** * @notice Helper function that computes the storage location of a particular delegation array * @param inputHash is the hash of the delegation * @return computedLocation is the storage key of the delegation array at position 0 * @dev Storage keys further down the array can be obtained by adding computedLocation with the element position * @dev Follows the solidity storage location encoding for a mapping(bytes32 => fixedArray) at the position of the delegationSlot */ function location(bytes32 inputHash) internal pure returns (bytes32 computedLocation) { assembly ("memory-safe") { // This block only allocates memory in the scratch space mstore(0, inputHash) mstore(32, DELEGATION_SLOT) computedLocation := keccak256(0, 64) // Run keccak256 over bytes in scratch space to obtain the storage key } } /** * @notice Helper function to compute delegation hash for all delegation * @param from is the address making the delegation * @param rights it the rights specified by the delegation * @param to is the address receiving the delegation * @return hash of the delegation parameters encoded with ALL_TYPE * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to)) followed by a shift left by 1 byte and writing the delegation type to the * cleaned last byte * @dev will not revert if from or to are > uint160, any input larger than uint160 for from and to will be cleaned to their last 20 bytes */ function allHash(address from, bytes32 rights, address to) internal pure returns (bytes32 hash) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer let ptr := mload(64) // Load the free memory pointer // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) hash := or(shl(8, keccak256(ptr, 72)), ALL_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last // byte } } /** * @notice Helper function to compute delegation location for all delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @return computedLocation is the storage location of the all delegation with those parameters in the delegations mapping * @dev gives the same location hash as location(allHash(rights, from, to)) would * @dev will not revert if from or to are > uint160, any input larger than uint160 for from and to will be cleaned to their last 20 bytes */ function allLocation(address from, bytes32 rights, address to) internal pure returns (bytes32 computedLocation) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer and in the scratch space let ptr := mload(64) // Load the free memory pointer // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) mstore(0, or(shl(8, keccak256(ptr, 72)), ALL_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the // last byte, and stores the result in the scratch space mstore(32, DELEGATION_SLOT) computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key } } /** * @notice Helper function to compute delegation hash for contract delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param contract_ is the address of the contract specified by the delegation * @return hash of the delegation parameters encoded with CONTRACT_TYPE * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_)) with the last byte overwritten with CONTRACT_TYPE * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function contractHash(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 hash) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer let ptr := mload(64) // Load the free memory pointer // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) hash := or(shl(8, keccak256(ptr, 92)), CONTRACT_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte } } /** * @notice Helper function to compute delegation location for contract delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param contract_ is the address of the contract specified by the delegation * @return computedLocation is the storage location of the contract delegation with those parameters in the delegations mapping * @dev gives the same location hash as location(contractHash(rights, from, to, contract_)) would * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function contractLocation(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 computedLocation) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer and in the scratch space let ptr := mload(64) // Load free memory pointer // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) mstore(0, or(shl(8, keccak256(ptr, 92)), CONTRACT_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the // last byte, and stores the result in the scratch space mstore(32, DELEGATION_SLOT) computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key } } /** * @notice Helper function to compute delegation hash for ERC721 delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param tokenId is the id of the token specified by the delegation * @param contract_ is the address of the contract specified by the delegation * @return hash of the parameters encoded with ERC721_TYPE * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_, tokenId)) with the last byte overwritten with ERC721_TYPE * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function erc721Hash(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 hash) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer let ptr := mload(64) // Cache the free memory pointer. // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 92), tokenId) mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) hash := or(shl(8, keccak256(ptr, 124)), ERC721_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte } } /** * @notice Helper function to compute delegation location for ERC721 delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param tokenId is the id of the erc721 token * @param contract_ is the address of the erc721 token contract * @return computedLocation is the storage location of the erc721 delegation with those parameters in the delegations mapping * @dev gives the same location hash as location(erc721Hash(rights, from, to, contract_, tokenId)) would * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function erc721Location(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 computedLocation) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer and in the scratch space let ptr := mload(64) // Cache the free memory pointer. // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 92), tokenId) mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) mstore(0, or(shl(8, keccak256(ptr, 124)), ERC721_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the // last byte, and stores the result in the scratch space mstore(32, DELEGATION_SLOT) computedLocation := keccak256(0, 64) // Runs keccak256 over the scratch space to obtain the storage key } } /** * @notice Helper function to compute delegation hash for ERC20 delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param contract_ is the address of the erc20 token contract * @return hash of the parameters encoded with ERC20_TYPE * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_)) with the last byte overwritten with ERC20_TYPE * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function erc20Hash(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 hash) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer let ptr := mload(64) // Load free memory pointer // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) hash := or(shl(8, keccak256(ptr, 92)), ERC20_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte } } /** * @notice Helper function to compute delegation location for ERC20 delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param contract_ is the address of the erc20 token contract * @return computedLocation is the storage location of the erc20 delegation with those parameters in the delegations mapping * @dev gives the same location hash as location(erc20Hash(rights, from, to, contract_)) would * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function erc20Location(address from, bytes32 rights, address to, address contract_) internal pure returns (bytes32 computedLocation) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer and in the scratch space let ptr := mload(64) // Loads the free memory pointer // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) mstore(0, or(shl(8, keccak256(ptr, 92)), ERC20_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the // last byte, and stores the result in the scratch space mstore(32, DELEGATION_SLOT) computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key } } /** * @notice Helper function to compute delegation hash for ERC1155 delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param tokenId is the id of the erc1155 token * @param contract_ is the address of the erc1155 token contract * @return hash of the parameters encoded with ERC1155_TYPE * @dev returned hash should be equivalent to keccak256(abi.encodePacked(rights, from, to, contract_, tokenId)) with the last byte overwritten with ERC1155_TYPE * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function erc1155Hash(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 hash) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer let ptr := mload(64) // Load the free memory pointer. // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 92), tokenId) mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) hash := or(shl(8, keccak256(ptr, 124)), ERC1155_TYPE) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the last byte } } /** * @notice Helper function to compute delegation hash for ERC1155 delegation * @param from is the address making the delegation * @param rights is the rights specified by the delegation * @param to is the address receiving the delegation * @param tokenId is the id of the erc1155 token * @param contract_ is the address of the erc1155 token contract * @return computedLocation is the storage location of the erc1155 delegation with those parameters in the delegations mapping * @dev gives the same location hash as location(erc1155Hash(rights, from, to, contract_, tokenId)) would * @dev will not revert if from, to, or contract_ are > uint160, any input larger than uint160 for from, to, or contract_ will be cleaned to their last 20 bytes */ function erc1155Location(address from, bytes32 rights, address to, uint256 tokenId, address contract_) internal pure returns (bytes32 computedLocation) { assembly ("memory-safe") { // This block only allocates memory after the free memory pointer and in the scratch space let ptr := mload(64) // Cache the free memory pointer. // Layout the variables from last to first, agnostic to upper 96 bits of address words. mstore(add(ptr, 92), tokenId) mstore(add(ptr, 60), contract_) mstore(add(ptr, 40), to) mstore(add(ptr, 20), from) mstore(ptr, rights) mstore(0, or(shl(8, keccak256(ptr, 124)), ERC1155_TYPE)) // Runs keccak over the packed encoding, shifts left by one byte, then writes the type to the // last byte, and stores the result in the scratch space mstore(32, DELEGATION_SLOT) computedLocation := keccak256(0, 64) // Runs keccak over the scratch space to obtain the storage key } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC1155/IERC1155.sol) 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 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 // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol) 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`. * * 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; /** * @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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * 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 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 the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/IERC20Permit.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; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ 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)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ 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"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @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"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @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). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // 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 cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token)); } }
// 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 v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// 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 v4.9.0) (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) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 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 256, 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 << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @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 * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// 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 (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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,"type":"function"},{"inputs":[{"internalType":"uint256","name":"delegateTokenId","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000447e69651d841bd8d104bed493000000000000000000000000c73dfd486bc155b8126a366f68a4fefe05ce1dcd000000000000000000000000ba93c25cd7db01b5d8f4b74ae4e3f5e048144834
-----Decoded View---------------
Arg [0] : _delegateRegistry (address): 0x00000000000000447e69651d841bD8D104Bed493
Arg [1] : _principalToken (address): 0xC73dFD486BC155b8126a366F68A4fefe05CE1dCD
Arg [2] : _marketMetadata (address): 0xBa93c25cD7db01b5d8f4b74aE4e3F5e048144834
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000447e69651d841bd8d104bed493
Arg [1] : 000000000000000000000000c73dfd486bc155b8126a366f68a4fefe05ce1dcd
Arg [2] : 000000000000000000000000ba93c25cd7db01b5d8f4b74ae4e3f5e048144834
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