ERC-721
Overview
Max Total Supply
19,632 MF-DCA-P
Holders
12,757
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
1 MF-DCA-PLoading...
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Contract Name:
DCAPermissionsManager
Compiler Version
v0.8.16+commit.07a7930e
Optimization Enabled:
Yes with 9999 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.8.7 <0.9.0; import '@openzeppelin/contracts/token/ERC721/ERC721.sol'; import '@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol'; import '../interfaces/IDCAHub.sol'; import '../interfaces/IDCAPermissionManager.sol'; import '../libraries/PermissionMath.sol'; import '../utils/Governable.sol'; // Note: ideally, this would be part of the DCAHub. However, since we've reached the max bytecode size, we needed to make it its own contract contract DCAPermissionsManager is ERC721, EIP712, Governable, IDCAPermissionManager { struct TokenPermission { // The actual permissions uint8 permissions; // The block number when it was last updated uint248 lastUpdated; } using PermissionMath for Permission[]; using PermissionMath for uint8; /// @inheritdoc IDCAPermissionManager bytes32 public constant PERMIT_TYPEHASH = keccak256('Permit(address spender,uint256 tokenId,uint256 nonce,uint256 deadline)'); /// @inheritdoc IDCAPermissionManager bytes32 public constant PERMISSION_PERMIT_TYPEHASH = keccak256( 'PermissionPermit(PermissionSet[] permissions,uint256 tokenId,uint256 nonce,uint256 deadline)PermissionSet(address operator,uint8[] permissions)' ); /// @inheritdoc IDCAPermissionManager bytes32 public constant MULTI_PERMISSION_PERMIT_TYPEHASH = keccak256( 'MultiPermissionPermit(PositionPermissions[] positions,uint256 nonce,uint256 deadline)PermissionSet(address operator,uint8[] permissions)PositionPermissions(uint256 tokenId,PermissionSet[] permissionSets)' ); /// @inheritdoc IDCAPermissionManager bytes32 public constant PERMISSION_SET_TYPEHASH = keccak256('PermissionSet(address operator,uint8[] permissions)'); /// @inheritdoc IDCAPermissionManager bytes32 public constant POSITION_PERMISSIONS_TYPEHASH = keccak256('PositionPermissions(uint256 tokenId,PermissionSet[] permissionSets)PermissionSet(address operator,uint8[] permissions)'); /// @inheritdoc IDCAPermissionManager IDCAHubPositionDescriptor public nftDescriptor; /// @inheritdoc IDCAPermissionManager address public hub; /// @inheritdoc IDCAPermissionManager mapping(address => uint256) public nonces; mapping(uint256 => uint256) public lastOwnershipChange; mapping(uint256 => mapping(address => TokenPermission)) public tokenPermissions; uint256 internal _burnCounter; constructor(address _governor, IDCAHubPositionDescriptor _descriptor) ERC721('Mean Finance - DCA Position', 'MF-DCA-P') EIP712('Mean Finance - DCA Position', '2') Governable(_governor) { if (address(_descriptor) == address(0)) revert ZeroAddress(); nftDescriptor = _descriptor; } /// @inheritdoc IDCAPermissionManager function setHub(address _hub) external { if (_hub == address(0)) revert ZeroAddress(); if (hub != address(0)) revert HubAlreadySet(); hub = _hub; } /// @inheritdoc IDCAPermissionManager function mint( uint256 _id, address _owner, PermissionSet[] calldata _permissions ) external { if (msg.sender != hub) revert OnlyHubCanExecute(); _mint(_owner, _id); _setPermissions(_id, _permissions); } /// @inheritdoc IDCAPermissionManager function hasPermission( uint256 _id, address _address, Permission _permission ) external view returns (bool) { if (ownerOf(_id) == _address) { return true; } TokenPermission memory _tokenPermission = tokenPermissions[_id][_address]; // If there was an ownership change after the permission was last updated, then the address doesn't have the permission return _tokenPermission.permissions.hasPermission(_permission) && lastOwnershipChange[_id] < _tokenPermission.lastUpdated; } /// @inheritdoc IDCAPermissionManager function hasPermissions( uint256 _id, address _address, Permission[] calldata _permissions ) external view returns (bool[] memory _hasPermissions) { _hasPermissions = new bool[](_permissions.length); if (ownerOf(_id) == _address) { // If the address is the owner, then they have all permissions for (uint256 i = 0; i < _permissions.length; i++) { _hasPermissions[i] = true; } } else { // If it's not the owner, then check one by one TokenPermission memory _tokenPermission = tokenPermissions[_id][_address]; if (lastOwnershipChange[_id] < _tokenPermission.lastUpdated) { for (uint256 i = 0; i < _permissions.length; i++) { if (_tokenPermission.permissions.hasPermission(_permissions[i])) { _hasPermissions[i] = true; } } } } } /// @inheritdoc IDCAPermissionManager function burn(uint256 _id) external { if (msg.sender != hub) revert OnlyHubCanExecute(); _burn(_id); ++_burnCounter; } /// @inheritdoc IDCAPermissionManager function modify(uint256 _id, PermissionSet[] calldata _permissions) public virtual { if (msg.sender != ownerOf(_id)) revert NotOwner(); _modify(_id, _permissions); } /// @inheritdoc IDCAPermissionManager function modifyMany(PositionPermissions[] calldata _permissions) external { for (uint256 i = 0; i < _permissions.length; ) { modify(_permissions[i].tokenId, _permissions[i].permissionSets); unchecked { i++; } } } /// @inheritdoc IDCAPermissionManager // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32) { return _domainSeparatorV4(); } /// @inheritdoc IERC721BasicEnumerable function totalSupply() external view returns (uint256) { return IDCAHubPositionHandler(hub).totalCreatedPositions() - _burnCounter; } /// @inheritdoc IDCAPermissionManager function permit( address _spender, uint256 _tokenId, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s ) external { if (block.timestamp > _deadline) revert ExpiredDeadline(); address _owner = ownerOf(_tokenId); bytes32 _structHash = keccak256(abi.encode(PERMIT_TYPEHASH, _spender, _tokenId, nonces[_owner]++, _deadline)); bytes32 _hash = _hashTypedDataV4(_structHash); address _signer = ECDSA.recover(_hash, _v, _r, _s); if (_signer != _owner) revert InvalidSignature(); _approve(_spender, _tokenId); } /// @inheritdoc IDCAPermissionManager function permissionPermit( PermissionSet[] calldata _permissions, uint256 _tokenId, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s ) external { if (block.timestamp > _deadline) revert ExpiredDeadline(); address _owner = ownerOf(_tokenId); bytes32 _structHash = keccak256( abi.encode(PERMISSION_PERMIT_TYPEHASH, keccak256(_encode(_permissions)), _tokenId, nonces[_owner]++, _deadline) ); bytes32 _hash = _hashTypedDataV4(_structHash); address _signer = ECDSA.recover(_hash, _v, _r, _s); if (_signer != _owner) revert InvalidSignature(); _modify(_tokenId, _permissions); } /// @inheritdoc IDCAPermissionManager function multiPermissionPermit( PositionPermissions[] calldata _permissions, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s ) external { if (block.timestamp > _deadline) revert ExpiredDeadline(); address _owner = ownerOf(_permissions[0].tokenId); bytes32 _structHash = keccak256(abi.encode(MULTI_PERMISSION_PERMIT_TYPEHASH, keccak256(_encode(_permissions)), nonces[_owner]++, _deadline)); bytes32 _hash = _hashTypedDataV4(_structHash); address _signer = ECDSA.recover(_hash, _v, _r, _s); if (_signer != _owner) revert InvalidSignature(); for (uint256 i = 0; i < _permissions.length; ) { uint256 _tokenId = _permissions[i].tokenId; if (i > 0) { address _positionOwner = ownerOf(_tokenId); if (_signer != _positionOwner) revert NotOwner(); } _modify(_tokenId, _permissions[i].permissionSets); unchecked { i++; } } } /// @inheritdoc IDCAPermissionManager function setNFTDescriptor(IDCAHubPositionDescriptor _descriptor) external onlyGovernor { if (address(_descriptor) == address(0)) revert ZeroAddress(); nftDescriptor = _descriptor; emit NFTDescriptorSet(_descriptor); } /// @inheritdoc ERC721 function tokenURI(uint256 _tokenId) public view override returns (string memory) { return nftDescriptor.tokenURI(hub, _tokenId); } function _encode(PositionPermissions[] calldata _permissions) internal pure returns (bytes memory _result) { for (uint256 i = 0; i < _permissions.length; ) { _result = bytes.concat(_result, keccak256(_encode(_permissions[i]))); unchecked { i++; } } } function _encode(PositionPermissions calldata _permission) internal pure returns (bytes memory _result) { _result = abi.encode(POSITION_PERMISSIONS_TYPEHASH, _permission.tokenId, keccak256(_encode(_permission.permissionSets))); } function _encode(PermissionSet[] calldata _permissions) internal pure returns (bytes memory _result) { for (uint256 i = 0; i < _permissions.length; ) { _result = bytes.concat(_result, keccak256(_encode(_permissions[i]))); unchecked { i++; } } } function _encode(PermissionSet calldata _permission) internal pure returns (bytes memory _result) { _result = abi.encode(PERMISSION_SET_TYPEHASH, _permission.operator, keccak256(_encode(_permission.permissions))); } function _encode(Permission[] calldata _permissions) internal pure returns (bytes memory _result) { _result = new bytes(_permissions.length * 32); for (uint256 i = 0; i < _permissions.length; ) { _result[(i + 1) * 32 - 1] = bytes1(uint8(_permissions[i])); unchecked { i++; } } } function _modify(uint256 _id, PermissionSet[] calldata _permissions) internal { _setPermissions(_id, _permissions); emit Modified(_id, _permissions); } function _setPermissions(uint256 _id, PermissionSet[] calldata _permissions) internal { uint248 _blockNumber = uint248(_getBlockNumber()); for (uint256 i = 0; i < _permissions.length; ) { PermissionSet memory _permissionSet = _permissions[i]; if (_permissionSet.permissions.length == 0) { delete tokenPermissions[_id][_permissionSet.operator]; } else { tokenPermissions[_id][_permissionSet.operator] = TokenPermission({ permissions: _permissionSet.permissions.toUInt8(), lastUpdated: _blockNumber }); } unchecked { i++; } } } function _beforeTokenTransfer( address _from, address _to, uint256 _id ) internal override { if (_to == address(0)) { // When token is being burned, we can delete this entry on the mapping delete lastOwnershipChange[_id]; } else if (_from != address(0)) { // If the token is being minted, then no need to write this lastOwnershipChange[_id] = _getBlockNumber(); } } // Note: virtual so that it can be overriden in tests function _getBlockNumber() internal view virtual returns (uint256) { return block.number; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (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 = _owners[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 nor 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 nor 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 nor 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 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 _owners[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); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), tokenId); } /** * @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); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @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. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol) pragma solidity ^0.8.0; import "./ECDSA.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * _Available since v3.4._ */ abstract contract EIP712 { /* solhint-disable var-name-mixedcase */ // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _CACHED_DOMAIN_SEPARATOR; uint256 private immutable _CACHED_CHAIN_ID; address private immutable _CACHED_THIS; bytes32 private immutable _HASHED_NAME; bytes32 private immutable _HASHED_VERSION; bytes32 private immutable _TYPE_HASH; /* solhint-enable var-name-mixedcase */ /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { bytes32 hashedName = keccak256(bytes(name)); bytes32 hashedVersion = keccak256(bytes(version)); bytes32 typeHash = keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ); _HASHED_NAME = hashedName; _HASHED_VERSION = hashedVersion; _CACHED_CHAIN_ID = block.chainid; _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion); _CACHED_THIS = address(this); _TYPE_HASH = typeHash; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) { return _CACHED_DOMAIN_SEPARATOR; } else { return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION); } } function _buildDomainSeparator( bytes32 typeHash, bytes32 nameHash, bytes32 versionHash ) private view returns (bytes32) { return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.8.7 <0.9.0; import '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol'; import '@mean-finance/oracles/solidity/interfaces/ITokenPriceOracle.sol'; import './IDCAPermissionManager.sol'; /** * @title The interface for all state related queries * @notice These methods allow users to read the hubs's current values */ interface IDCAHubParameters { /** * @notice Returns how much will the amount to swap differ from the previous swap. f.e. if the returned value is -100, then the amount to swap will be 100 less than the swap just before it * @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB) * @param tokenA One of the pair's token * @param tokenB The other of the pair's token * @param swapIntervalMask The byte representation of the swap interval to check * @param swapNumber The swap number to check * @return swapDeltaAToB How much less of token A will the following swap require * @return swapDeltaBToA How much less of token B will the following swap require */ function swapAmountDelta( address tokenA, address tokenB, bytes1 swapIntervalMask, uint32 swapNumber ) external view returns (uint128 swapDeltaAToB, uint128 swapDeltaBToA); /** * @notice Returns the sum of the ratios reported in all swaps executed until the given swap number * @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB) * @param tokenA One of the pair's token * @param tokenB The other of the pair's token * @param swapIntervalMask The byte representation of the swap interval to check * @param swapNumber The swap number to check * @return accumRatioAToB The sum of all ratios from A to B * @return accumRatioBToA The sum of all ratios from B to A */ function accumRatio( address tokenA, address tokenB, bytes1 swapIntervalMask, uint32 swapNumber ) external view returns (uint256 accumRatioAToB, uint256 accumRatioBToA); /** * @notice Returns swapping information about a specific pair * @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB) * @param tokenA One of the pair's token * @param tokenB The other of the pair's token * @param swapIntervalMask The byte representation of the swap interval to check * @return performedSwaps How many swaps have been executed * @return nextAmountToSwapAToB How much of token A will be swapped on the next swap * @return lastSwappedAt Timestamp of the last swap * @return nextAmountToSwapBToA How much of token B will be swapped on the next swap */ function swapData( address tokenA, address tokenB, bytes1 swapIntervalMask ) external view returns ( uint32 performedSwaps, uint224 nextAmountToSwapAToB, uint32 lastSwappedAt, uint224 nextAmountToSwapBToA ); /** * @notice Returns the byte representation of the set of actice swap intervals for the given pair * @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB) * @param tokenA The smaller of the pair's token * @param tokenB The other of the pair's token * @return The byte representation of the set of actice swap intervals */ function activeSwapIntervals(address tokenA, address tokenB) external view returns (bytes1); /** * @notice Returns how much of the hub's token balance belongs to the platform * @param token The token to check * @return The amount that belongs to the platform */ function platformBalance(address token) external view returns (uint256); } /** * @title The interface for all position related matters * @notice These methods allow users to create, modify and terminate their positions */ interface IDCAHubPositionHandler { /// @notice The position of a certain user struct UserPosition { // The token that the user deposited and will be swapped in exchange for "to" IERC20Metadata from; // The token that the user will get in exchange for their "from" tokens in each swap IERC20Metadata to; // How frequently the position's swaps should be executed uint32 swapInterval; // How many swaps were executed since deposit, last modification, or last withdraw uint32 swapsExecuted; // How many "to" tokens can currently be withdrawn uint256 swapped; // How many swaps left the position has to execute uint32 swapsLeft; // How many "from" tokens there are left to swap uint256 remaining; // How many "from" tokens need to be traded in each swap uint120 rate; } /// @notice A list of positions that all have the same `to` token struct PositionSet { // The `to` token address token; // The position ids uint256[] positionIds; } /** * @notice Emitted when a position is terminated * @param user The address of the user that terminated the position * @param recipientUnswapped The address of the user that will receive the unswapped tokens * @param recipientSwapped The address of the user that will receive the swapped tokens * @param positionId The id of the position that was terminated * @param returnedUnswapped How many "from" tokens were returned to the caller * @param returnedSwapped How many "to" tokens were returned to the caller */ event Terminated( address indexed user, address indexed recipientUnswapped, address indexed recipientSwapped, uint256 positionId, uint256 returnedUnswapped, uint256 returnedSwapped ); /** * @notice Emitted when a position is created * @param depositor The address of the user that creates the position * @param owner The address of the user that will own the position * @param positionId The id of the position that was created * @param fromToken The address of the "from" token * @param toToken The address of the "to" token * @param swapInterval How frequently the position's swaps should be executed * @param rate How many "from" tokens need to be traded in each swap * @param startingSwap The number of the swap when the position will be executed for the first time * @param lastSwap The number of the swap when the position will be executed for the last time * @param permissions The permissions defined for the position */ event Deposited( address indexed depositor, address indexed owner, uint256 positionId, address fromToken, address toToken, uint32 swapInterval, uint120 rate, uint32 startingSwap, uint32 lastSwap, IDCAPermissionManager.PermissionSet[] permissions ); /** * @notice Emitted when a position is created and extra data is provided * @param positionId The id of the position that was created * @param data The extra data that was provided */ event Miscellaneous(uint256 positionId, bytes data); /** * @notice Emitted when a user withdraws all swapped tokens from a position * @param withdrawer The address of the user that executed the withdraw * @param recipient The address of the user that will receive the withdrawn tokens * @param positionId The id of the position that was affected * @param token The address of the withdrawn tokens. It's the same as the position's "to" token * @param amount The amount that was withdrawn */ event Withdrew(address indexed withdrawer, address indexed recipient, uint256 positionId, address token, uint256 amount); /** * @notice Emitted when a user withdraws all swapped tokens from many positions * @param withdrawer The address of the user that executed the withdraws * @param recipient The address of the user that will receive the withdrawn tokens * @param positions The positions to withdraw from * @param withdrew The total amount that was withdrawn from each token */ event WithdrewMany(address indexed withdrawer, address indexed recipient, PositionSet[] positions, uint256[] withdrew); /** * @notice Emitted when a position is modified * @param user The address of the user that modified the position * @param positionId The id of the position that was modified * @param rate How many "from" tokens need to be traded in each swap * @param startingSwap The number of the swap when the position will be executed for the first time * @param lastSwap The number of the swap when the position will be executed for the last time */ event Modified(address indexed user, uint256 positionId, uint120 rate, uint32 startingSwap, uint32 lastSwap); /// @notice Thrown when a user tries to create a position with the same `from` & `to` error InvalidToken(); /// @notice Thrown when a user tries to create a position with a swap interval that is not allowed error IntervalNotAllowed(); /// @notice Thrown when a user tries operate on a position that doesn't exist (it might have been already terminated) error InvalidPosition(); /// @notice Thrown when a user tries operate on a position that they don't have access to error UnauthorizedCaller(); /// @notice Thrown when a user tries to create a position with zero swaps error ZeroSwaps(); /// @notice Thrown when a user tries to create a position with zero funds error ZeroAmount(); /// @notice Thrown when a user tries to withdraw a position whose `to` token doesn't match the specified one error PositionDoesNotMatchToken(); /// @notice Thrown when a user tries create or modify a position with an amount too big error AmountTooBig(); /** * @notice Returns the permission manager contract * @return The contract itself */ function permissionManager() external view returns (IDCAPermissionManager); /** * @notice Returns total created positions * @return The total created positions */ function totalCreatedPositions() external view returns (uint256); /** * @notice Returns a user position * @param positionId The id of the position * @return position The position itself */ function userPosition(uint256 positionId) external view returns (UserPosition memory position); /** * @notice Creates a new position * @dev Will revert: * - With ZeroAddress if from, to or owner are zero * - With InvalidToken if from == to * - With ZeroAmount if amount is zero * - With AmountTooBig if amount is too big * - With ZeroSwaps if amountOfSwaps is zero * - With IntervalNotAllowed if swapInterval is not allowed * @param from The address of the "from" token * @param to The address of the "to" token * @param amount How many "from" tokens will be swapped in total * @param amountOfSwaps How many swaps to execute for this position * @param swapInterval How frequently the position's swaps should be executed * @param owner The address of the owner of the position being created * @param permissions Extra permissions to add to the position. Can be empty * @return positionId The id of the created position */ function deposit( address from, address to, uint256 amount, uint32 amountOfSwaps, uint32 swapInterval, address owner, IDCAPermissionManager.PermissionSet[] calldata permissions ) external returns (uint256 positionId); /** * @notice Creates a new position * @dev Will revert: * - With ZeroAddress if from, to or owner are zero * - With InvalidToken if from == to * - With ZeroAmount if amount is zero * - With AmountTooBig if amount is too big * - With ZeroSwaps if amountOfSwaps is zero * - With IntervalNotAllowed if swapInterval is not allowed * @param from The address of the "from" token * @param to The address of the "to" token * @param amount How many "from" tokens will be swapped in total * @param amountOfSwaps How many swaps to execute for this position * @param swapInterval How frequently the position's swaps should be executed * @param owner The address of the owner of the position being created * @param permissions Extra permissions to add to the position. Can be empty * @param miscellaneous Bytes that will be emitted, and associated with the position * @return positionId The id of the created position */ function deposit( address from, address to, uint256 amount, uint32 amountOfSwaps, uint32 swapInterval, address owner, IDCAPermissionManager.PermissionSet[] calldata permissions, bytes calldata miscellaneous ) external returns (uint256 positionId); /** * @notice Withdraws all swapped tokens from a position to a recipient * @dev Will revert: * - With InvalidPosition if positionId is invalid * - With UnauthorizedCaller if the caller doesn't have access to the position * - With ZeroAddress if recipient is zero * @param positionId The position's id * @param recipient The address to withdraw swapped tokens to * @return swapped How much was withdrawn */ function withdrawSwapped(uint256 positionId, address recipient) external returns (uint256 swapped); /** * @notice Withdraws all swapped tokens from multiple positions * @dev Will revert: * - With InvalidPosition if any of the position ids are invalid * - With UnauthorizedCaller if the caller doesn't have access to the position to any of the given positions * - With ZeroAddress if recipient is zero * - With PositionDoesNotMatchToken if any of the positions do not match the token in their position set * @param positions A list positions, grouped by `to` token * @param recipient The address to withdraw swapped tokens to * @return withdrawn How much was withdrawn for each token */ function withdrawSwappedMany(PositionSet[] calldata positions, address recipient) external returns (uint256[] memory withdrawn); /** * @notice Takes the unswapped balance, adds the new deposited funds and modifies the position so that * it is executed in newSwaps swaps * @dev Will revert: * - With InvalidPosition if positionId is invalid * - With UnauthorizedCaller if the caller doesn't have access to the position * - With AmountTooBig if amount is too big * @param positionId The position's id * @param amount Amount of funds to add to the position * @param newSwaps The new amount of swaps */ function increasePosition( uint256 positionId, uint256 amount, uint32 newSwaps ) external; /** * @notice Withdraws the specified amount from the unswapped balance and modifies the position so that * it is executed in newSwaps swaps * @dev Will revert: * - With InvalidPosition if positionId is invalid * - With UnauthorizedCaller if the caller doesn't have access to the position * - With ZeroSwaps if newSwaps is zero and amount is not the total unswapped balance * @param positionId The position's id * @param amount Amount of funds to withdraw from the position * @param newSwaps The new amount of swaps * @param recipient The address to send tokens to */ function reducePosition( uint256 positionId, uint256 amount, uint32 newSwaps, address recipient ) external; /** * @notice Terminates the position and sends all unswapped and swapped balance to the specified recipients * @dev Will revert: * - With InvalidPosition if positionId is invalid * - With UnauthorizedCaller if the caller doesn't have access to the position * - With ZeroAddress if recipientUnswapped or recipientSwapped is zero * @param positionId The position's id * @param recipientUnswapped The address to withdraw unswapped tokens to * @param recipientSwapped The address to withdraw swapped tokens to * @return unswapped The unswapped balance sent to `recipientUnswapped` * @return swapped The swapped balance sent to `recipientSwapped` */ function terminate( uint256 positionId, address recipientUnswapped, address recipientSwapped ) external returns (uint256 unswapped, uint256 swapped); } /** * @title The interface for all swap related matters * @notice These methods allow users to get information about the next swap, and how to execute it */ interface IDCAHubSwapHandler { /// @notice Information about a swap struct SwapInfo { // The tokens involved in the swap TokenInSwap[] tokens; // The pairs involved in the swap PairInSwap[] pairs; } /// @notice Information about a token's role in a swap struct TokenInSwap { // The token's address address token; // How much will be given of this token as a reward uint256 reward; // How much of this token needs to be provided by swapper uint256 toProvide; // How much of this token will be paid to the platform uint256 platformFee; } /// @notice Information about a pair in a swap struct PairInSwap { // The address of one of the tokens address tokenA; // The address of the other token address tokenB; // The total amount of token A swapped in this pair uint256 totalAmountToSwapTokenA; // The total amount of token B swapped in this pair uint256 totalAmountToSwapTokenB; // How much is 1 unit of token A when converted to B uint256 ratioAToB; // How much is 1 unit of token B when converted to A uint256 ratioBToA; // The swap intervals involved in the swap, represented as a byte bytes1 intervalsInSwap; } /// @notice A pair of tokens, represented by their indexes in an array struct PairIndexes { // The index of the token A uint8 indexTokenA; // The index of the token B uint8 indexTokenB; } /** * @notice Emitted when a swap is executed * @param sender The address of the user that initiated the swap * @param rewardRecipient The address that received the reward * @param callbackHandler The address that executed the callback * @param swapInformation All information related to the swap * @param borrowed How much was borrowed * @param fee The swap fee at the moment of the swap */ event Swapped( address indexed sender, address indexed rewardRecipient, address indexed callbackHandler, SwapInfo swapInformation, uint256[] borrowed, uint32 fee ); /// @notice Thrown when pairs indexes are not sorted correctly error InvalidPairs(); /// @notice Thrown when trying to execute a swap, but there is nothing to swap error NoSwapsToExecute(); /** * @notice Returns all information related to the next swap * @dev Will revert with: * - With InvalidTokens if tokens are not sorted, or if there are duplicates * - With InvalidPairs if pairs are not sorted (first by indexTokenA and then indexTokenB), or if indexTokenA >= indexTokenB for any pair * @param tokens The tokens involved in the next swap * @param pairs The pairs that you want to swap. Each element of the list points to the index of the token in the tokens array * @param calculatePrivilegedAvailability Some accounts get privileged availability and can execute swaps before others. This flag provides * the possibility to calculate the next swap information for privileged and non-privileged accounts * @param oracleData Bytes to send to the oracle when executing a quote * @return swapInformation The information about the next swap */ function getNextSwapInfo( address[] calldata tokens, PairIndexes[] calldata pairs, bool calculatePrivilegedAvailability, bytes calldata oracleData ) external view returns (SwapInfo memory swapInformation); /** * @notice Executes a flash swap * @dev Will revert with: * - With InvalidTokens if tokens are not sorted, or if there are duplicates * - With InvalidPairs if pairs are not sorted (first by indexTokenA and then indexTokenB), or if indexTokenA >= indexTokenB for any pair * - With Paused if swaps are paused by protocol * - With NoSwapsToExecute if there are no swaps to execute for the given pairs * - With LiquidityNotReturned if the required tokens were not back during the callback * @param tokens The tokens involved in the next swap * @param pairsToSwap The pairs that you want to swap. Each element of the list points to the index of the token in the tokens array * @param rewardRecipient The address to send the reward to * @param callbackHandler Address to call for callback (and send the borrowed tokens to) * @param borrow How much to borrow of each of the tokens in tokens. The amount must match the position of the token in the tokens array * @param callbackData Bytes to send to the caller during the callback * @param oracleData Bytes to send to the oracle when executing a quote * @return Information about the executed swap */ function swap( address[] calldata tokens, PairIndexes[] calldata pairsToSwap, address rewardRecipient, address callbackHandler, uint256[] calldata borrow, bytes calldata callbackData, bytes calldata oracleData ) external returns (SwapInfo memory); } /** * @title The interface for handling all configuration * @notice This contract will manage configuration that affects all pairs, swappers, etc */ interface IDCAHubConfigHandler { /** * @notice Emitted when a new oracle is set * @param oracle The new oracle contract */ event OracleSet(ITokenPriceOracle oracle); /** * @notice Emitted when a new swap fee is set * @param feeSet The new swap fee */ event SwapFeeSet(uint32 feeSet); /** * @notice Emitted when new swap intervals are allowed * @param swapIntervals The new swap intervals */ event SwapIntervalsAllowed(uint32[] swapIntervals); /** * @notice Emitted when some swap intervals are no longer allowed * @param swapIntervals The swap intervals that are no longer allowed */ event SwapIntervalsForbidden(uint32[] swapIntervals); /** * @notice Emitted when a new platform fee ratio is set * @param platformFeeRatio The new platform fee ratio */ event PlatformFeeRatioSet(uint16 platformFeeRatio); /** * @notice Emitted when allowed states of tokens are updated * @param tokens Array of updated tokens * @param allowed Array of new allow state per token were allowed[i] is the updated state of tokens[i] */ event TokensAllowedUpdated(address[] tokens, bool[] allowed); /// @notice Thrown when trying to interact with an unallowed token error UnallowedToken(); /// @notice Thrown when set allowed tokens input is not valid error InvalidAllowedTokensInput(); /// @notice Thrown when trying to set a fee higher than the maximum allowed error HighFee(); /// @notice Thrown when trying to set a fee that is not multiple of 100 error InvalidFee(); /// @notice Thrown when trying to set a fee ratio that is higher that the maximum allowed error HighPlatformFeeRatio(); /** * @notice Returns the max fee ratio that can be set * @dev Cannot be modified * @return The maximum possible value */ // solhint-disable-next-line func-name-mixedcase function MAX_PLATFORM_FEE_RATIO() external view returns (uint16); /** * @notice Returns the fee charged on swaps * @return swapFee The fee itself */ function swapFee() external view returns (uint32 swapFee); /** * @notice Returns the price oracle contract * @return oracle The contract itself */ function oracle() external view returns (ITokenPriceOracle oracle); /** * @notice Returns how much will the platform take from the fees collected in swaps * @return The current ratio */ function platformFeeRatio() external view returns (uint16); /** * @notice Returns the max fee that can be set for swaps * @dev Cannot be modified * @return maxFee The maximum possible fee */ // solhint-disable-next-line func-name-mixedcase function MAX_FEE() external view returns (uint32 maxFee); /** * @notice Returns a byte that represents allowed swap intervals * @return allowedSwapIntervals The allowed swap intervals */ function allowedSwapIntervals() external view returns (bytes1 allowedSwapIntervals); /** * @notice Returns if a token is currently allowed or not * @return Allowed state of token */ function allowedTokens(address token) external view returns (bool); /** * @notice Returns token's magnitude (10**decimals) * @return Stored magnitude for token */ function tokenMagnitude(address token) external view returns (uint120); /** * @notice Returns whether swaps and deposits are currently paused * @return isPaused Whether swaps and deposits are currently paused */ function paused() external view returns (bool isPaused); /** * @notice Sets a new swap fee * @dev Will revert with HighFee if the fee is higher than the maximum * @dev Will revert with InvalidFee if the fee is not multiple of 100 * @param fee The new swap fee */ function setSwapFee(uint32 fee) external; /** * @notice Sets a new price oracle * @dev Will revert with ZeroAddress if the zero address is passed * @param oracle The new oracle contract */ function setOracle(ITokenPriceOracle oracle) external; /** * @notice Sets a new platform fee ratio * @dev Will revert with HighPlatformFeeRatio if given ratio is too high * @param platformFeeRatio The new ratio */ function setPlatformFeeRatio(uint16 platformFeeRatio) external; /** * @notice Adds new swap intervals to the allowed list * @param swapIntervals The new swap intervals */ function addSwapIntervalsToAllowedList(uint32[] calldata swapIntervals) external; /** * @notice Removes some swap intervals from the allowed list * @param swapIntervals The swap intervals to remove */ function removeSwapIntervalsFromAllowedList(uint32[] calldata swapIntervals) external; /// @notice Pauses all swaps and deposits function pause() external; /// @notice Unpauses all swaps and deposits function unpause() external; } /** * @title The interface for handling platform related actions * @notice This contract will handle all actions that affect the platform in some way */ interface IDCAHubPlatformHandler { /** * @notice Emitted when someone withdraws from the paltform balance * @param sender The address of the user that initiated the withdraw * @param recipient The address that received the withdraw * @param amounts The tokens (and the amount) that were withdrawn */ event WithdrewFromPlatform(address indexed sender, address indexed recipient, IDCAHub.AmountOfToken[] amounts); /** * @notice Withdraws tokens from the platform balance * @param amounts The amounts to withdraw * @param recipient The address that will receive the tokens */ function withdrawFromPlatformBalance(IDCAHub.AmountOfToken[] calldata amounts, address recipient) external; } interface IDCAHub is IDCAHubParameters, IDCAHubConfigHandler, IDCAHubSwapHandler, IDCAHubPositionHandler, IDCAHubPlatformHandler { /// @notice Specifies an amount of a token. For example to determine how much to borrow from certain tokens struct AmountOfToken { // The tokens' address address token; // How much to borrow or withdraw of the specified token uint256 amount; } /// @notice Thrown when one of the parameters is a zero address error ZeroAddress(); /// @notice Thrown when the expected liquidity is not returned in flash swaps error LiquidityNotReturned(); /// @notice Thrown when a list of token pairs is not sorted, or if there are duplicates error InvalidTokens(); }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.8.7 <0.9.0; import '@openzeppelin/contracts/token/ERC721/IERC721.sol'; import '@mean-finance/nft-descriptors/solidity/interfaces/IDCAHubPositionDescriptor.sol'; interface IERC721BasicEnumerable { /** * @notice Count NFTs tracked by this contract * @return A count of valid NFTs tracked by this contract, where each one of * them has an assigned and queryable owner not equal to the zero address */ function totalSupply() external view returns (uint256); } /** * @title The interface for all permission related matters * @notice These methods allow users to set and remove permissions to their positions */ interface IDCAPermissionManager is IERC721, IERC721BasicEnumerable { /// @notice Set of possible permissions enum Permission { INCREASE, REDUCE, WITHDRAW, TERMINATE } /// @notice A set of permissions for a specific operator struct PermissionSet { // The address of the operator address operator; // The permissions given to the overator Permission[] permissions; } /// @notice A collection of permissions sets for a specific position struct PositionPermissions { // The id of the token uint256 tokenId; // The permissions to assign to the position PermissionSet[] permissionSets; } /** * @notice Emitted when permissions for a token are modified * @param tokenId The id of the token * @param permissions The set of permissions that were updated */ event Modified(uint256 tokenId, PermissionSet[] permissions); /** * @notice Emitted when the address for a new descritor is set * @param descriptor The new descriptor contract */ event NFTDescriptorSet(IDCAHubPositionDescriptor descriptor); /// @notice Thrown when a user tries to set the hub, once it was already set error HubAlreadySet(); /// @notice Thrown when a user provides a zero address when they shouldn't error ZeroAddress(); /// @notice Thrown when a user calls a method that can only be executed by the hub error OnlyHubCanExecute(); /// @notice Thrown when a user tries to modify permissions for a token they do not own error NotOwner(); /// @notice Thrown when a user tries to execute a permit with an expired deadline error ExpiredDeadline(); /// @notice Thrown when a user tries to execute a permit with an invalid signature error InvalidSignature(); /** * @notice The permit typehash used in the permit signature * @return The typehash for the permit */ // solhint-disable-next-line func-name-mixedcase function PERMIT_TYPEHASH() external pure returns (bytes32); /** * @notice The permit typehash used in the permission permit signature * @return The typehash for the permission permit */ // solhint-disable-next-line func-name-mixedcase function PERMISSION_PERMIT_TYPEHASH() external pure returns (bytes32); /** * @notice The permit typehash used in the multi permission permit signature * @return The typehash for the multi permission permit */ // solhint-disable-next-line func-name-mixedcase function MULTI_PERMISSION_PERMIT_TYPEHASH() external pure returns (bytes32); /** * @notice The permit typehash used in the permission permit signature * @return The typehash for the permission set */ // solhint-disable-next-line func-name-mixedcase function PERMISSION_SET_TYPEHASH() external pure returns (bytes32); /** * @notice The permit typehash used in the multi permission permit signature * @return The typehash for the position permissions */ // solhint-disable-next-line func-name-mixedcase function POSITION_PERMISSIONS_TYPEHASH() external pure returns (bytes32); /** * @notice The domain separator used in the permit signature * @return The domain seperator used in encoding of permit signature */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); /** * @notice Returns the NFT descriptor contract * @return The contract for the NFT descriptor */ function nftDescriptor() external returns (IDCAHubPositionDescriptor); /** * @notice Returns the address of the DCA Hub * @return The address of the DCA Hub */ function hub() external returns (address); /** * @notice Returns the next nonce to use for a given user * @param user The address of the user * @return nonce The next nonce to use */ function nonces(address user) external returns (uint256 nonce); /** * @notice Returns whether the given address has the permission for the given token * @param id The id of the token to check * @param account The address of the user to check * @param permission The permission to check * @return Whether the user has the permission or not */ function hasPermission( uint256 id, address account, Permission permission ) external view returns (bool); /** * @notice Returns whether the given address has the permissions for the given token * @param id The id of the token to check * @param account The address of the user to check * @param permissions The permissions to check * @return hasPermissions Whether the user has each permission or not */ function hasPermissions( uint256 id, address account, Permission[] calldata permissions ) external view returns (bool[] memory hasPermissions); /** * @notice Sets the address for the hub * @dev Can only be successfully executed once. Once it's set, it can be modified again * Will revert: * - With ZeroAddress if address is zero * - With HubAlreadySet if the hub has already been set * @param hub The address to set for the hub */ function setHub(address hub) external; /** * @notice Mints a new NFT with the given id, and sets the permissions for it * @dev Will revert with OnlyHubCanExecute if the caller is not the hub * @param id The id of the new NFT * @param owner The owner of the new NFT * @param permissions Permissions to set for the new NFT */ function mint( uint256 id, address owner, PermissionSet[] calldata permissions ) external; /** * @notice Burns the NFT with the given id, and clears all permissions * @dev Will revert with OnlyHubCanExecute if the caller is not the hub * @param id The token's id */ function burn(uint256 id) external; /** * @notice Sets new permissions for the given position * @dev Will revert with NotOwner if the caller is not the token's owner. * Operators that are not part of the given permission sets do not see their permissions modified. * In order to remove permissions to an operator, provide an empty list of permissions for them * @param id The token's id * @param permissions A list of permission sets */ function modify(uint256 id, PermissionSet[] calldata permissions) external; /** * @notice Sets new permissions for the given positions * @dev This is basically the same as executing multiple `modify` * @param permissions A list of position permissions to set */ function modifyMany(PositionPermissions[] calldata permissions) external; /** * @notice Approves spending of a specific token ID by spender via signature * @param spender The account that is being approved * @param tokenId The ID of the token that is being approved for spending * @param deadline The deadline timestamp by which the call must be mined for the approve to work * @param v Must produce valid secp256k1 signature from the holder along with `r` and `s` * @param r Must produce valid secp256k1 signature from the holder along with `v` and `s` * @param s Must produce valid secp256k1 signature from the holder along with `r` and `v` */ function permit( address spender, uint256 tokenId, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @notice Sets permissions via signature * @dev This method works similarly to `modifyMany`, but instead of being executed by the owner, it can be set by signature * @param permissions The permissions to set for the different positions * @param deadline The deadline timestamp by which the call must be mined for the approve to work * @param v Must produce valid secp256k1 signature from the holder along with `r` and `s` * @param r Must produce valid secp256k1 signature from the holder along with `v` and `s` * @param s Must produce valid secp256k1 signature from the holder along with `r` and `v` */ function multiPermissionPermit( PositionPermissions[] calldata permissions, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @notice Sets permissions via signature * @dev This method works similarly to `modify`, but instead of being executed by the owner, it can be set my signature * @param permissions The permissions to set * @param tokenId The token's id * @param deadline The deadline timestamp by which the call must be mined for the approve to work * @param v Must produce valid secp256k1 signature from the holder along with `r` and `s` * @param r Must produce valid secp256k1 signature from the holder along with `v` and `s` * @param s Must produce valid secp256k1 signature from the holder along with `r` and `v` */ function permissionPermit( PermissionSet[] calldata permissions, uint256 tokenId, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @notice Sets a new NFT descriptor * @dev Will revert with ZeroAddress if address is zero * @param descriptor The new NFT descriptor contract */ function setNFTDescriptor(IDCAHubPositionDescriptor descriptor) external; }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.8.7 <0.9.0; import '../interfaces/IDCAPermissionManager.sol'; /// @title Permission Math library /// @notice Provides functions to easily convert from permissions to an int representation and viceversa library PermissionMath { /// @notice Takes a list of permissions and returns the int representation of the set that contains them all /// @param _permissions The list of permissions /// @return _representation The uint representation function toUInt8(IDCAPermissionManager.Permission[] memory _permissions) internal pure returns (uint8 _representation) { for (uint256 i = 0; i < _permissions.length; ) { _representation |= uint8(1 << uint8(_permissions[i])); unchecked { i++; } } } /// @notice Takes an int representation of a set of permissions, and returns whether it contains the given permission /// @param _representation The int representation /// @param _permission The permission to check for /// @return _hasPermission Whether the representation contains the given permission function hasPermission(uint8 _representation, IDCAPermissionManager.Permission _permission) internal pure returns (bool _hasPermission) { uint256 _bitMask = 1 << uint8(_permission); _hasPermission = (_representation & _bitMask) != 0; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.7.0; interface IGovernable { event PendingGovernorSet(address pendingGovernor); event PendingGovernorAccepted(); function setPendingGovernor(address _pendingGovernor) external; function acceptPendingGovernor() external; function governor() external view returns (address); function pendingGovernor() external view returns (address); function isGovernor(address _account) external view returns (bool _isGovernor); function isPendingGovernor(address _account) external view returns (bool _isPendingGovernor); } abstract contract Governable is IGovernable { address private _governor; address private _pendingGovernor; constructor(address __governor) { require(__governor != address(0), 'Governable: zero address'); _governor = __governor; } function governor() external view override returns (address) { return _governor; } function pendingGovernor() external view override returns (address) { return _pendingGovernor; } function setPendingGovernor(address __pendingGovernor) external virtual override onlyGovernor { _setPendingGovernor(__pendingGovernor); } function _setPendingGovernor(address __pendingGovernor) internal { require(__pendingGovernor != address(0), 'Governable: zero address'); _pendingGovernor = __pendingGovernor; emit PendingGovernorSet(__pendingGovernor); } function acceptPendingGovernor() external virtual override onlyPendingGovernor { _acceptPendingGovernor(); } function _acceptPendingGovernor() internal { require(_pendingGovernor != address(0), 'Governable: no pending governor'); _governor = _pendingGovernor; _pendingGovernor = address(0); emit PendingGovernorAccepted(); } function isGovernor(address _account) public view override returns (bool _isGovernor) { return _account == _governor; } function isPendingGovernor(address _account) public view override returns (bool _isPendingGovernor) { return _account == _pendingGovernor; } modifier onlyGovernor() { require(isGovernor(msg.sender), 'Governable: only governor'); _; } modifier onlyPendingGovernor() { require(isPendingGovernor(msg.sender), 'Governable: only pending governor'); _; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev 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 v4.6.0) (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 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 v4.7.0) (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 * ==== * * [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://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @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 v4.7.0) (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_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) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/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 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 v4.7.3) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: GPL-2.0-or-later pragma solidity >=0.5.0; /** * @title The interface for an oracle that provides price quotes * @notice These methods allow users to add support for pairs, and then ask for quotes */ interface ITokenPriceOracle { /// @notice Thrown when trying to add support for a pair that cannot be supported error PairCannotBeSupported(address tokenA, address tokenB); /// @notice Thrown when trying to execute a quote with a pair that isn't supported yet error PairNotSupportedYet(address tokenA, address tokenB); /** * @notice Returns whether this oracle can support the given pair of tokens * @dev tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order * @param tokenA One of the pair's tokens * @param tokenB The other of the pair's tokens * @return Whether the given pair of tokens can be supported by the oracle */ function canSupportPair(address tokenA, address tokenB) external view returns (bool); /** * @notice Returns whether this oracle is already supporting the given pair of tokens * @dev tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order * @param tokenA One of the pair's tokens * @param tokenB The other of the pair's tokens * @return Whether the given pair of tokens is already being supported by the oracle */ function isPairAlreadySupported(address tokenA, address tokenB) external view returns (bool); /** * @notice Returns a quote, based on the given tokens and amount * @dev Will revert if pair isn't supported * @param tokenIn The token that will be provided * @param amountIn The amount that will be provided * @param tokenOut The token we would like to quote * @param data Custom data that the oracle might need to operate * @return amountOut How much `tokenOut` will be returned in exchange for `amountIn` amount of `tokenIn` */ function quote( address tokenIn, uint256 amountIn, address tokenOut, bytes calldata data ) external view returns (uint256 amountOut); /** * @notice Add or reconfigures the support for a given pair. This function will let the oracle take some actions * to configure the pair, in preparation for future quotes. Can be called many times in order to let the oracle * re-configure for a new context * @dev Will revert if pair cannot be supported. tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order * @param tokenA One of the pair's tokens * @param tokenB The other of the pair's tokens * @param data Custom data that the oracle might need to operate */ function addOrModifySupportForPair( address tokenA, address tokenB, bytes calldata data ) external; /** * @notice Adds support for a given pair if the oracle didn't support it already. If called for a pair that is already supported, * then nothing will happen. This function will let the oracle take some actions to configure the pair, in preparation * for future quotes * @dev Will revert if pair cannot be supported. tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order * @param tokenA One of the pair's tokens * @param tokenB The other of the pair's tokens * @param data Custom data that the oracle might need to operate */ function addSupportForPairIfNeeded( address tokenA, address tokenB, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (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: GPL-2.0-or-later pragma solidity >=0.8.7 <0.9.0; /** * @title The interface for generating a description for a position in a DCA Hub * @notice Contracts that implement this interface must return a base64 JSON with the entire description */ interface IDCAHubPositionDescriptor { /** * @notice Generates a positions's description, both the JSON and the image inside * @param hub The address of the DCA Hub * @param positionId The token/position id * @return description The position's description */ function tokenURI(address hub, uint256 positionId) external view returns (string memory description); }
{ "optimizer": { "enabled": true, "runs": 9999 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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IDCAHubPositionDescriptor","name":"_descriptor","type":"address"}],"name":"setNFTDescriptor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"__pendingGovernor","type":"address"}],"name":"setPendingGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"tokenPermissions","outputs":[{"internalType":"uint8","name":"permissions","type":"uint8"},{"internalType":"uint248","name":"lastUpdated","type":"uint248"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","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)
000000000000000000000000308810881807189cae91950888b2cb73a1cc59200000000000000000000000004acd4bc402bc8e6ba8abddca639d8011ef0b8a4b
-----Decoded View---------------
Arg [0] : _governor (address): 0x308810881807189cAe91950888b2cB73A1CC5920
Arg [1] : _descriptor (address): 0x4ACd4BC402bc8e6BA8aBDdcA639d8011ef0b8a4b
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000308810881807189cae91950888b2cb73a1cc5920
Arg [1] : 0000000000000000000000004acd4bc402bc8e6ba8abddca639d8011ef0b8a4b
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