ERC-721
Overview
Max Total Supply
9,000 MF-DCA-P
Holders
5,621
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
v0.8.13+commit.abaa5c0e
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/IDCATokenDescriptor.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 PERMISSION_SET_TYPEHASH = keccak256('PermissionSet(address operator,uint8[] permissions)');
/// @inheritdoc IDCAPermissionManager
IDCATokenDescriptor 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, IDCATokenDescriptor _descriptor)
ERC721('Mean Finance - DCA Position', 'MF-DCA-P')
EIP712('Mean Finance - DCA Position', '1')
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; 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; 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) external {
if (msg.sender != ownerOf(_id)) revert NotOwner();
_modify(_id, _permissions);
}
/// @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 setNFTDescriptor(IDCATokenDescriptor _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(PermissionSet[] calldata _permissions) internal pure returns (bytes memory _result) {
for (uint256 i; i < _permissions.length; i++) {
_result = bytes.concat(_result, keccak256(_encode(_permissions[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; i < _permissions.length; i++) {
_result[(i + 1) * 32 - 1] = bytes1(uint8(_permissions[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; i < _permissions.length; i++) {
if (_permissions[i].permissions.length == 0) {
delete tokenPermissions[_id][_permissions[i].operator];
} else {
tokenPermissions[_id][_permissions[i].operator] = TokenPermission({
permissions: _permissions[i].permissions.toUInt8(),
lastUpdated: _blockNumber
});
}
}
}
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 v4.4.1 (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: balance query for the zero address");
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: owner query for nonexistent token");
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) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
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 overriden 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 owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
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: transfer caller is not 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: transfer caller is not 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) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, 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);
}
/**
* @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);
}
/**
* @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 of token that is not own");
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);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {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 a {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 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 {
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 {}
}// 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 './IDCAPermissionManager.sol';
import './oracles/IPriceOracle.sol';
/// @title The interface for all state related queries
/// @notice These methods allow users to read the hubs's current values
interface IDCAHubParameters {
/// @notice Swap information about a specific pair
struct SwapData {
// How many swaps have been executed
uint32 performedSwaps;
// How much of token A will be swapped on the next swap
uint224 nextAmountToSwapAToB;
// Timestamp of the last swap
uint32 lastSwappedAt;
// How much of token B will be swapped on the next swap
uint224 nextAmountToSwapBToA;
}
/// @notice The difference of tokens to swap between a swap, and the previous one
struct SwapDelta {
// How much less of token A will the following swap require
uint128 swapDeltaAToB;
// How much less of token B will the following swap require
uint128 swapDeltaBToA;
}
/// @notice The sum of the ratios the oracle reported in all executed swaps
struct AccumRatio {
// The sum of all ratios from A to B
uint256 accumRatioAToB;
// The sum of all ratios from B to A
uint256 accumRatioBToA;
}
/// @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 and _tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order
/// @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 How much will the amount to swap differ, when compared to the swap just before this one
function swapAmountDelta(
address _tokenA,
address _tokenB,
bytes1 _swapIntervalMask,
uint32 _swapNumber
) external view returns (SwapDelta memory);
/// @notice Returns the sum of the ratios reported in all swaps executed until the given swap number
/// @dev _tokenA and _tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order
/// @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 The sum of the ratios
function accumRatio(
address _tokenA,
address _tokenB,
bytes1 _swapIntervalMask,
uint32 _swapNumber
) external view returns (AccumRatio memory);
/// @notice Returns swapping information about a specific pair
/// @dev _tokenA and _tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order
/// @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 The swapping information
function swapData(
address _tokenA,
address _tokenB,
bytes1 _swapIntervalMask
) external view returns (SwapData memory);
/// @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;
// 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
/// @return _swapInformation The information about the next swap
function getNextSwapInfo(address[] calldata _tokens, PairIndexes[] calldata _pairs) 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
/// Paused if swaps are paused by protocol
/// NoSwapsToExecute if there are no swaps to execute for the given pairs
/// 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 _data Bytes to send to the caller during the callback
/// @return Information about the executed swap
function swap(
address[] calldata _tokens,
PairIndexes[] calldata _pairsToSwap,
address _rewardRecipient,
address _callbackHandler,
uint256[] calldata _borrow,
bytes calldata _data
) 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(IPriceOracle _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 (IPriceOracle _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(IPriceOracle _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;
/// @title The interface for generating a token's description
/// @notice Contracts that implement this interface must return a base64 JSON with the entire description
interface IDCATokenDescriptor {
/// @notice Thrown when a user tries get the description of an unsupported interval
error InvalidInterval();
/// @notice Generates a token's description, both the JSON and the image inside
/// @param _hub The address of the DCA Hub
/// @param _tokenId The token/position id
/// @return _description The position's description
function tokenURI(address _hub, uint256 _tokenId) external view returns (string memory _description);
/// @notice Returns a text description for the given swap interval. For example for 3600, returns 'Hourly'
/// @dev Will revert with InvalidInterval if the function receives a unsupported interval
/// @param _swapInterval The swap interval
/// @return _description The description
function intervalToDescription(uint32 _swapInterval) external pure returns (string memory _description);
}// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.7 <0.9.0;
import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import './IDCATokenDescriptor.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 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(IDCATokenDescriptor 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 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 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 (IDCATokenDescriptor);
/// @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 _address 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 _address,
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 _address 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 _address,
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 tokens
/// @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 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 `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(IDCATokenDescriptor _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; i < _permissions.length; i++) {
_representation |= uint8(1 << uint8(_permissions[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 v4.4.1 (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`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 `IERC721.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 v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}// SPDX-License-Identifier: MIT
// 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 v4.4.1 (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) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
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.
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 if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} 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;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 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 IPriceOracle {
/// @notice Returns whether this oracle can support this 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 a quote, based on the given tokens and amount
/// @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
/// @return _amountOut How much _tokenOut will be returned in exchange for _amountIn amount of _tokenIn
function quote(
address _tokenIn,
uint128 _amountIn,
address _tokenOut
) external view returns (uint256 _amountOut);
/// @notice Reconfigures 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
function reconfigureSupportForPair(address _tokenA, address _tokenB) 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
function addSupportForPairIfNeeded(address _tokenA, address _tokenB) external;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}{
"optimizer": {
"enabled": true,
"runs": 9999
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"metadata": {
"useLiteralContent": true
},
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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IDCATokenDescriptor","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)
000000000000000000000000308810881807189cae91950888b2cb73a1cc5920000000000000000000000000f3f361c1a84969db21eb5ed278bc987b7540923c
-----Decoded View---------------
Arg [0] : _governor (address): 0x308810881807189cAe91950888b2cB73A1CC5920
Arg [1] : _descriptor (address): 0xF3F361C1A84969dB21eB5Ed278BC987B7540923C
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000308810881807189cae91950888b2cb73a1cc5920
Arg [1] : 000000000000000000000000f3f361c1a84969db21eb5ed278bc987b7540923c
[ Download: CSV Export ]
[ Download: CSV Export ]
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