0x20...9923
Mean Finance - DCA Position - IHnOCkkkUx
MF-DCA-P
Collection
Collection
This contract's source code is verified!
Contract Metadata
Compiler
0.8.16+commit.07a7930e
Language
Solidity
Contract Source Code
File 1 of 20: Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
Contract Source Code
File 2 of 20: Context.sol
// 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;
}
}
Contract Source Code
File 3 of 20: DCAPermissionsManager.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.8.7 <0.9.0;
import '@openzeppelin/contracts/token/ERC721/ERC721.sol';
import '@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol';
import '../interfaces/IDCAHub.sol';
import '../interfaces/IDCAPermissionManager.sol';
import '../libraries/PermissionMath.sol';
import '../utils/Governable.sol';
// Note: ideally, this would be part of the DCAHub. However, since we've reached the max bytecode size, we needed to make it its own contract
contract DCAPermissionsManager is ERC721, EIP712, Governable, IDCAPermissionManager {
struct TokenPermission {
// The actual permissions
uint8 permissions;
// The block number when it was last updated
uint248 lastUpdated;
}
using PermissionMath for Permission[];
using PermissionMath for uint8;
/// @inheritdoc IDCAPermissionManager
bytes32 public constant PERMIT_TYPEHASH = keccak256('Permit(address spender,uint256 tokenId,uint256 nonce,uint256 deadline)');
/// @inheritdoc IDCAPermissionManager
bytes32 public constant PERMISSION_PERMIT_TYPEHASH =
keccak256(
'PermissionPermit(PermissionSet[] permissions,uint256 tokenId,uint256 nonce,uint256 deadline)PermissionSet(address operator,uint8[] permissions)'
);
/// @inheritdoc IDCAPermissionManager
bytes32 public constant MULTI_PERMISSION_PERMIT_TYPEHASH =
keccak256(
'MultiPermissionPermit(PositionPermissions[] positions,uint256 nonce,uint256 deadline)PermissionSet(address operator,uint8[] permissions)PositionPermissions(uint256 tokenId,PermissionSet[] permissionSets)'
);
/// @inheritdoc IDCAPermissionManager
bytes32 public constant PERMISSION_SET_TYPEHASH = keccak256('PermissionSet(address operator,uint8[] permissions)');
/// @inheritdoc IDCAPermissionManager
bytes32 public constant POSITION_PERMISSIONS_TYPEHASH =
keccak256('PositionPermissions(uint256 tokenId,PermissionSet[] permissionSets)PermissionSet(address operator,uint8[] permissions)');
/// @inheritdoc IDCAPermissionManager
IDCAHubPositionDescriptor public nftDescriptor;
/// @inheritdoc IDCAPermissionManager
address public hub;
/// @inheritdoc IDCAPermissionManager
mapping(address => uint256) public nonces;
mapping(uint256 => uint256) public lastOwnershipChange;
mapping(uint256 => mapping(address => TokenPermission)) public tokenPermissions;
uint256 internal _burnCounter;
constructor(address _governor, IDCAHubPositionDescriptor _descriptor)
ERC721('Mean Finance - DCA Position', 'MF-DCA-P')
EIP712('Mean Finance - DCA Position', '2')
Governable(_governor)
{
if (address(_descriptor) == address(0)) revert ZeroAddress();
nftDescriptor = _descriptor;
}
/// @inheritdoc IDCAPermissionManager
function setHub(address _hub) external {
if (_hub == address(0)) revert ZeroAddress();
if (hub != address(0)) revert HubAlreadySet();
hub = _hub;
}
/// @inheritdoc IDCAPermissionManager
function mint(
uint256 _id,
address _owner,
PermissionSet[] calldata _permissions
) external {
if (msg.sender != hub) revert OnlyHubCanExecute();
_mint(_owner, _id);
_setPermissions(_id, _permissions);
}
/// @inheritdoc IDCAPermissionManager
function hasPermission(
uint256 _id,
address _address,
Permission _permission
) external view returns (bool) {
if (ownerOf(_id) == _address) {
return true;
}
TokenPermission memory _tokenPermission = tokenPermissions[_id][_address];
// If there was an ownership change after the permission was last updated, then the address doesn't have the permission
return _tokenPermission.permissions.hasPermission(_permission) && lastOwnershipChange[_id] < _tokenPermission.lastUpdated;
}
/// @inheritdoc IDCAPermissionManager
function hasPermissions(
uint256 _id,
address _address,
Permission[] calldata _permissions
) external view returns (bool[] memory _hasPermissions) {
_hasPermissions = new bool[](_permissions.length);
if (ownerOf(_id) == _address) {
// If the address is the owner, then they have all permissions
for (uint256 i = 0; i < _permissions.length; i++) {
_hasPermissions[i] = true;
}
} else {
// If it's not the owner, then check one by one
TokenPermission memory _tokenPermission = tokenPermissions[_id][_address];
if (lastOwnershipChange[_id] < _tokenPermission.lastUpdated) {
for (uint256 i = 0; i < _permissions.length; i++) {
if (_tokenPermission.permissions.hasPermission(_permissions[i])) {
_hasPermissions[i] = true;
}
}
}
}
}
/// @inheritdoc IDCAPermissionManager
function burn(uint256 _id) external {
if (msg.sender != hub) revert OnlyHubCanExecute();
_burn(_id);
++_burnCounter;
}
/// @inheritdoc IDCAPermissionManager
function modify(uint256 _id, PermissionSet[] calldata _permissions) public virtual {
if (msg.sender != ownerOf(_id)) revert NotOwner();
_modify(_id, _permissions);
}
/// @inheritdoc IDCAPermissionManager
function modifyMany(PositionPermissions[] calldata _permissions) external {
for (uint256 i = 0; i < _permissions.length; ) {
modify(_permissions[i].tokenId, _permissions[i].permissionSets);
unchecked {
i++;
}
}
}
/// @inheritdoc IDCAPermissionManager
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32) {
return _domainSeparatorV4();
}
/// @inheritdoc IERC721BasicEnumerable
function totalSupply() external view returns (uint256) {
return IDCAHubPositionHandler(hub).totalCreatedPositions() - _burnCounter;
}
/// @inheritdoc IDCAPermissionManager
function permit(
address _spender,
uint256 _tokenId,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
if (block.timestamp > _deadline) revert ExpiredDeadline();
address _owner = ownerOf(_tokenId);
bytes32 _structHash = keccak256(abi.encode(PERMIT_TYPEHASH, _spender, _tokenId, nonces[_owner]++, _deadline));
bytes32 _hash = _hashTypedDataV4(_structHash);
address _signer = ECDSA.recover(_hash, _v, _r, _s);
if (_signer != _owner) revert InvalidSignature();
_approve(_spender, _tokenId);
}
/// @inheritdoc IDCAPermissionManager
function permissionPermit(
PermissionSet[] calldata _permissions,
uint256 _tokenId,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
if (block.timestamp > _deadline) revert ExpiredDeadline();
address _owner = ownerOf(_tokenId);
bytes32 _structHash = keccak256(
abi.encode(PERMISSION_PERMIT_TYPEHASH, keccak256(_encode(_permissions)), _tokenId, nonces[_owner]++, _deadline)
);
bytes32 _hash = _hashTypedDataV4(_structHash);
address _signer = ECDSA.recover(_hash, _v, _r, _s);
if (_signer != _owner) revert InvalidSignature();
_modify(_tokenId, _permissions);
}
/// @inheritdoc IDCAPermissionManager
function multiPermissionPermit(
PositionPermissions[] calldata _permissions,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
if (block.timestamp > _deadline) revert ExpiredDeadline();
address _owner = ownerOf(_permissions[0].tokenId);
bytes32 _structHash = keccak256(abi.encode(MULTI_PERMISSION_PERMIT_TYPEHASH, keccak256(_encode(_permissions)), nonces[_owner]++, _deadline));
bytes32 _hash = _hashTypedDataV4(_structHash);
address _signer = ECDSA.recover(_hash, _v, _r, _s);
if (_signer != _owner) revert InvalidSignature();
for (uint256 i = 0; i < _permissions.length; ) {
uint256 _tokenId = _permissions[i].tokenId;
if (i > 0) {
address _positionOwner = ownerOf(_tokenId);
if (_signer != _positionOwner) revert NotOwner();
}
_modify(_tokenId, _permissions[i].permissionSets);
unchecked {
i++;
}
}
}
/// @inheritdoc IDCAPermissionManager
function setNFTDescriptor(IDCAHubPositionDescriptor _descriptor) external onlyGovernor {
if (address(_descriptor) == address(0)) revert ZeroAddress();
nftDescriptor = _descriptor;
emit NFTDescriptorSet(_descriptor);
}
/// @inheritdoc ERC721
function tokenURI(uint256 _tokenId) public view override returns (string memory) {
return nftDescriptor.tokenURI(hub, _tokenId);
}
function _encode(PositionPermissions[] calldata _permissions) internal pure returns (bytes memory _result) {
for (uint256 i = 0; i < _permissions.length; ) {
_result = bytes.concat(_result, keccak256(_encode(_permissions[i])));
unchecked {
i++;
}
}
}
function _encode(PositionPermissions calldata _permission) internal pure returns (bytes memory _result) {
_result = abi.encode(POSITION_PERMISSIONS_TYPEHASH, _permission.tokenId, keccak256(_encode(_permission.permissionSets)));
}
function _encode(PermissionSet[] calldata _permissions) internal pure returns (bytes memory _result) {
for (uint256 i = 0; i < _permissions.length; ) {
_result = bytes.concat(_result, keccak256(_encode(_permissions[i])));
unchecked {
i++;
}
}
}
function _encode(PermissionSet calldata _permission) internal pure returns (bytes memory _result) {
_result = abi.encode(PERMISSION_SET_TYPEHASH, _permission.operator, keccak256(_encode(_permission.permissions)));
}
function _encode(Permission[] calldata _permissions) internal pure returns (bytes memory _result) {
_result = new bytes(_permissions.length * 32);
for (uint256 i = 0; i < _permissions.length; ) {
_result[(i + 1) * 32 - 1] = bytes1(uint8(_permissions[i]));
unchecked {
i++;
}
}
}
function _modify(uint256 _id, PermissionSet[] calldata _permissions) internal {
_setPermissions(_id, _permissions);
emit Modified(_id, _permissions);
}
function _setPermissions(uint256 _id, PermissionSet[] calldata _permissions) internal {
uint248 _blockNumber = uint248(_getBlockNumber());
for (uint256 i = 0; i < _permissions.length; ) {
PermissionSet memory _permissionSet = _permissions[i];
if (_permissionSet.permissions.length == 0) {
delete tokenPermissions[_id][_permissionSet.operator];
} else {
tokenPermissions[_id][_permissionSet.operator] = TokenPermission({
permissions: _permissionSet.permissions.toUInt8(),
lastUpdated: _blockNumber
});
}
unchecked {
i++;
}
}
}
function _beforeTokenTransfer(
address _from,
address _to,
uint256 _id
) internal override {
if (_to == address(0)) {
// When token is being burned, we can delete this entry on the mapping
delete lastOwnershipChange[_id];
} else if (_from != address(0)) {
// If the token is being minted, then no need to write this
lastOwnershipChange[_id] = _getBlockNumber();
}
}
// Note: virtual so that it can be overriden in tests
function _getBlockNumber() internal view virtual returns (uint256) {
return block.number;
}
}
Contract Source Code
File 4 of 20: ECDSA.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.3) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
/// @solidity memory-safe-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
Contract Source Code
File 5 of 20: ERC165.sol
// 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;
}
}
Contract Source Code
File 6 of 20: ERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: address zero is not a valid owner");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: invalid token ID");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
_requireMinted(tokenId);
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not token owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
_requireMinted(tokenId);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner nor approved");
_safeTransfer(from, to, tokenId, data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits an {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Reverts if the `tokenId` has not been minted yet.
*/
function _requireMinted(uint256 tokenId) internal view virtual {
require(_exists(tokenId), "ERC721: invalid token ID");
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
/// @solidity memory-safe-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
Contract Source Code
File 7 of 20: Governable.sol
// 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');
_;
}
}
Contract Source Code
File 8 of 20: IDCAHub.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.7 <0.9.0;
import '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';
import '@mean-finance/oracles/solidity/interfaces/ITokenPriceOracle.sol';
import './IDCAPermissionManager.sol';
/**
* @title The interface for all state related queries
* @notice These methods allow users to read the hubs's current values
*/
interface IDCAHubParameters {
/**
* @notice Returns how much will the amount to swap differ from the previous swap. f.e. if the returned value is -100, then the amount to swap will be 100 less than the swap just before it
* @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB)
* @param tokenA One of the pair's token
* @param tokenB The other of the pair's token
* @param swapIntervalMask The byte representation of the swap interval to check
* @param swapNumber The swap number to check
* @return swapDeltaAToB How much less of token A will the following swap require
* @return swapDeltaBToA How much less of token B will the following swap require
*/
function swapAmountDelta(
address tokenA,
address tokenB,
bytes1 swapIntervalMask,
uint32 swapNumber
) external view returns (uint128 swapDeltaAToB, uint128 swapDeltaBToA);
/**
* @notice Returns the sum of the ratios reported in all swaps executed until the given swap number
* @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB)
* @param tokenA One of the pair's token
* @param tokenB The other of the pair's token
* @param swapIntervalMask The byte representation of the swap interval to check
* @param swapNumber The swap number to check
* @return accumRatioAToB The sum of all ratios from A to B
* @return accumRatioBToA The sum of all ratios from B to A
*/
function accumRatio(
address tokenA,
address tokenB,
bytes1 swapIntervalMask,
uint32 swapNumber
) external view returns (uint256 accumRatioAToB, uint256 accumRatioBToA);
/**
* @notice Returns swapping information about a specific pair
* @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB)
* @param tokenA One of the pair's token
* @param tokenB The other of the pair's token
* @param swapIntervalMask The byte representation of the swap interval to check
* @return performedSwaps How many swaps have been executed
* @return nextAmountToSwapAToB How much of token A will be swapped on the next swap
* @return lastSwappedAt Timestamp of the last swap
* @return nextAmountToSwapBToA How much of token B will be swapped on the next swap
*/
function swapData(
address tokenA,
address tokenB,
bytes1 swapIntervalMask
)
external
view
returns (
uint32 performedSwaps,
uint224 nextAmountToSwapAToB,
uint32 lastSwappedAt,
uint224 nextAmountToSwapBToA
);
/**
* @notice Returns the byte representation of the set of actice swap intervals for the given pair
* @dev `tokenA` must be smaller than `tokenB` (tokenA < tokenB)
* @param tokenA The smaller of the pair's token
* @param tokenB The other of the pair's token
* @return The byte representation of the set of actice swap intervals
*/
function activeSwapIntervals(address tokenA, address tokenB) external view returns (bytes1);
/**
* @notice Returns how much of the hub's token balance belongs to the platform
* @param token The token to check
* @return The amount that belongs to the platform
*/
function platformBalance(address token) external view returns (uint256);
}
/**
* @title The interface for all position related matters
* @notice These methods allow users to create, modify and terminate their positions
*/
interface IDCAHubPositionHandler {
/// @notice The position of a certain user
struct UserPosition {
// The token that the user deposited and will be swapped in exchange for "to"
IERC20Metadata from;
// The token that the user will get in exchange for their "from" tokens in each swap
IERC20Metadata to;
// How frequently the position's swaps should be executed
uint32 swapInterval;
// How many swaps were executed since deposit, last modification, or last withdraw
uint32 swapsExecuted;
// How many "to" tokens can currently be withdrawn
uint256 swapped;
// How many swaps left the position has to execute
uint32 swapsLeft;
// How many "from" tokens there are left to swap
uint256 remaining;
// How many "from" tokens need to be traded in each swap
uint120 rate;
}
/// @notice A list of positions that all have the same `to` token
struct PositionSet {
// The `to` token
address token;
// The position ids
uint256[] positionIds;
}
/**
* @notice Emitted when a position is terminated
* @param user The address of the user that terminated the position
* @param recipientUnswapped The address of the user that will receive the unswapped tokens
* @param recipientSwapped The address of the user that will receive the swapped tokens
* @param positionId The id of the position that was terminated
* @param returnedUnswapped How many "from" tokens were returned to the caller
* @param returnedSwapped How many "to" tokens were returned to the caller
*/
event Terminated(
address indexed user,
address indexed recipientUnswapped,
address indexed recipientSwapped,
uint256 positionId,
uint256 returnedUnswapped,
uint256 returnedSwapped
);
/**
* @notice Emitted when a position is created
* @param depositor The address of the user that creates the position
* @param owner The address of the user that will own the position
* @param positionId The id of the position that was created
* @param fromToken The address of the "from" token
* @param toToken The address of the "to" token
* @param swapInterval How frequently the position's swaps should be executed
* @param rate How many "from" tokens need to be traded in each swap
* @param startingSwap The number of the swap when the position will be executed for the first time
* @param lastSwap The number of the swap when the position will be executed for the last time
* @param permissions The permissions defined for the position
*/
event Deposited(
address indexed depositor,
address indexed owner,
uint256 positionId,
address fromToken,
address toToken,
uint32 swapInterval,
uint120 rate,
uint32 startingSwap,
uint32 lastSwap,
IDCAPermissionManager.PermissionSet[] permissions
);
/**
* @notice Emitted when a position is created and extra data is provided
* @param positionId The id of the position that was created
* @param data The extra data that was provided
*/
event Miscellaneous(uint256 positionId, bytes data);
/**
* @notice Emitted when a user withdraws all swapped tokens from a position
* @param withdrawer The address of the user that executed the withdraw
* @param recipient The address of the user that will receive the withdrawn tokens
* @param positionId The id of the position that was affected
* @param token The address of the withdrawn tokens. It's the same as the position's "to" token
* @param amount The amount that was withdrawn
*/
event Withdrew(address indexed withdrawer, address indexed recipient, uint256 positionId, address token, uint256 amount);
/**
* @notice Emitted when a user withdraws all swapped tokens from many positions
* @param withdrawer The address of the user that executed the withdraws
* @param recipient The address of the user that will receive the withdrawn tokens
* @param positions The positions to withdraw from
* @param withdrew The total amount that was withdrawn from each token
*/
event WithdrewMany(address indexed withdrawer, address indexed recipient, PositionSet[] positions, uint256[] withdrew);
/**
* @notice Emitted when a position is modified
* @param user The address of the user that modified the position
* @param positionId The id of the position that was modified
* @param rate How many "from" tokens need to be traded in each swap
* @param startingSwap The number of the swap when the position will be executed for the first time
* @param lastSwap The number of the swap when the position will be executed for the last time
*/
event Modified(address indexed user, uint256 positionId, uint120 rate, uint32 startingSwap, uint32 lastSwap);
/// @notice Thrown when a user tries to create a position with the same `from` & `to`
error InvalidToken();
/// @notice Thrown when a user tries to create a position with a swap interval that is not allowed
error IntervalNotAllowed();
/// @notice Thrown when a user tries operate on a position that doesn't exist (it might have been already terminated)
error InvalidPosition();
/// @notice Thrown when a user tries operate on a position that they don't have access to
error UnauthorizedCaller();
/// @notice Thrown when a user tries to create a position with zero swaps
error ZeroSwaps();
/// @notice Thrown when a user tries to create a position with zero funds
error ZeroAmount();
/// @notice Thrown when a user tries to withdraw a position whose `to` token doesn't match the specified one
error PositionDoesNotMatchToken();
/// @notice Thrown when a user tries create or modify a position with an amount too big
error AmountTooBig();
/**
* @notice Returns the permission manager contract
* @return The contract itself
*/
function permissionManager() external view returns (IDCAPermissionManager);
/**
* @notice Returns total created positions
* @return The total created positions
*/
function totalCreatedPositions() external view returns (uint256);
/**
* @notice Returns a user position
* @param positionId The id of the position
* @return position The position itself
*/
function userPosition(uint256 positionId) external view returns (UserPosition memory position);
/**
* @notice Creates a new position
* @dev Will revert:
* - With ZeroAddress if from, to or owner are zero
* - With InvalidToken if from == to
* - With ZeroAmount if amount is zero
* - With AmountTooBig if amount is too big
* - With ZeroSwaps if amountOfSwaps is zero
* - With IntervalNotAllowed if swapInterval is not allowed
* @param from The address of the "from" token
* @param to The address of the "to" token
* @param amount How many "from" tokens will be swapped in total
* @param amountOfSwaps How many swaps to execute for this position
* @param swapInterval How frequently the position's swaps should be executed
* @param owner The address of the owner of the position being created
* @param permissions Extra permissions to add to the position. Can be empty
* @return positionId The id of the created position
*/
function deposit(
address from,
address to,
uint256 amount,
uint32 amountOfSwaps,
uint32 swapInterval,
address owner,
IDCAPermissionManager.PermissionSet[] calldata permissions
) external returns (uint256 positionId);
/**
* @notice Creates a new position
* @dev Will revert:
* - With ZeroAddress if from, to or owner are zero
* - With InvalidToken if from == to
* - With ZeroAmount if amount is zero
* - With AmountTooBig if amount is too big
* - With ZeroSwaps if amountOfSwaps is zero
* - With IntervalNotAllowed if swapInterval is not allowed
* @param from The address of the "from" token
* @param to The address of the "to" token
* @param amount How many "from" tokens will be swapped in total
* @param amountOfSwaps How many swaps to execute for this position
* @param swapInterval How frequently the position's swaps should be executed
* @param owner The address of the owner of the position being created
* @param permissions Extra permissions to add to the position. Can be empty
* @param miscellaneous Bytes that will be emitted, and associated with the position
* @return positionId The id of the created position
*/
function deposit(
address from,
address to,
uint256 amount,
uint32 amountOfSwaps,
uint32 swapInterval,
address owner,
IDCAPermissionManager.PermissionSet[] calldata permissions,
bytes calldata miscellaneous
) external returns (uint256 positionId);
/**
* @notice Withdraws all swapped tokens from a position to a recipient
* @dev Will revert:
* - With InvalidPosition if positionId is invalid
* - With UnauthorizedCaller if the caller doesn't have access to the position
* - With ZeroAddress if recipient is zero
* @param positionId The position's id
* @param recipient The address to withdraw swapped tokens to
* @return swapped How much was withdrawn
*/
function withdrawSwapped(uint256 positionId, address recipient) external returns (uint256 swapped);
/**
* @notice Withdraws all swapped tokens from multiple positions
* @dev Will revert:
* - With InvalidPosition if any of the position ids are invalid
* - With UnauthorizedCaller if the caller doesn't have access to the position to any of the given positions
* - With ZeroAddress if recipient is zero
* - With PositionDoesNotMatchToken if any of the positions do not match the token in their position set
* @param positions A list positions, grouped by `to` token
* @param recipient The address to withdraw swapped tokens to
* @return withdrawn How much was withdrawn for each token
*/
function withdrawSwappedMany(PositionSet[] calldata positions, address recipient) external returns (uint256[] memory withdrawn);
/**
* @notice Takes the unswapped balance, adds the new deposited funds and modifies the position so that
* it is executed in newSwaps swaps
* @dev Will revert:
* - With InvalidPosition if positionId is invalid
* - With UnauthorizedCaller if the caller doesn't have access to the position
* - With AmountTooBig if amount is too big
* @param positionId The position's id
* @param amount Amount of funds to add to the position
* @param newSwaps The new amount of swaps
*/
function increasePosition(
uint256 positionId,
uint256 amount,
uint32 newSwaps
) external;
/**
* @notice Withdraws the specified amount from the unswapped balance and modifies the position so that
* it is executed in newSwaps swaps
* @dev Will revert:
* - With InvalidPosition if positionId is invalid
* - With UnauthorizedCaller if the caller doesn't have access to the position
* - With ZeroSwaps if newSwaps is zero and amount is not the total unswapped balance
* @param positionId The position's id
* @param amount Amount of funds to withdraw from the position
* @param newSwaps The new amount of swaps
* @param recipient The address to send tokens to
*/
function reducePosition(
uint256 positionId,
uint256 amount,
uint32 newSwaps,
address recipient
) external;
/**
* @notice Terminates the position and sends all unswapped and swapped balance to the specified recipients
* @dev Will revert:
* - With InvalidPosition if positionId is invalid
* - With UnauthorizedCaller if the caller doesn't have access to the position
* - With ZeroAddress if recipientUnswapped or recipientSwapped is zero
* @param positionId The position's id
* @param recipientUnswapped The address to withdraw unswapped tokens to
* @param recipientSwapped The address to withdraw swapped tokens to
* @return unswapped The unswapped balance sent to `recipientUnswapped`
* @return swapped The swapped balance sent to `recipientSwapped`
*/
function terminate(
uint256 positionId,
address recipientUnswapped,
address recipientSwapped
) external returns (uint256 unswapped, uint256 swapped);
}
/**
* @title The interface for all swap related matters
* @notice These methods allow users to get information about the next swap, and how to execute it
*/
interface IDCAHubSwapHandler {
/// @notice Information about a swap
struct SwapInfo {
// The tokens involved in the swap
TokenInSwap[] tokens;
// The pairs involved in the swap
PairInSwap[] pairs;
}
/// @notice Information about a token's role in a swap
struct TokenInSwap {
// The token's address
address token;
// How much will be given of this token as a reward
uint256 reward;
// How much of this token needs to be provided by swapper
uint256 toProvide;
// How much of this token will be paid to the platform
uint256 platformFee;
}
/// @notice Information about a pair in a swap
struct PairInSwap {
// The address of one of the tokens
address tokenA;
// The address of the other token
address tokenB;
// The total amount of token A swapped in this pair
uint256 totalAmountToSwapTokenA;
// The total amount of token B swapped in this pair
uint256 totalAmountToSwapTokenB;
// How much is 1 unit of token A when converted to B
uint256 ratioAToB;
// How much is 1 unit of token B when converted to A
uint256 ratioBToA;
// The swap intervals involved in the swap, represented as a byte
bytes1 intervalsInSwap;
}
/// @notice A pair of tokens, represented by their indexes in an array
struct PairIndexes {
// The index of the token A
uint8 indexTokenA;
// The index of the token B
uint8 indexTokenB;
}
/**
* @notice Emitted when a swap is executed
* @param sender The address of the user that initiated the swap
* @param rewardRecipient The address that received the reward
* @param callbackHandler The address that executed the callback
* @param swapInformation All information related to the swap
* @param borrowed How much was borrowed
* @param fee The swap fee at the moment of the swap
*/
event Swapped(
address indexed sender,
address indexed rewardRecipient,
address indexed callbackHandler,
SwapInfo swapInformation,
uint256[] borrowed,
uint32 fee
);
/// @notice Thrown when pairs indexes are not sorted correctly
error InvalidPairs();
/// @notice Thrown when trying to execute a swap, but there is nothing to swap
error NoSwapsToExecute();
/**
* @notice Returns all information related to the next swap
* @dev Will revert with:
* - With InvalidTokens if tokens are not sorted, or if there are duplicates
* - With InvalidPairs if pairs are not sorted (first by indexTokenA and then indexTokenB), or if indexTokenA >= indexTokenB for any pair
* @param tokens The tokens involved in the next swap
* @param pairs The pairs that you want to swap. Each element of the list points to the index of the token in the tokens array
* @param calculatePrivilegedAvailability Some accounts get privileged availability and can execute swaps before others. This flag provides
* the possibility to calculate the next swap information for privileged and non-privileged accounts
* @param oracleData Bytes to send to the oracle when executing a quote
* @return swapInformation The information about the next swap
*/
function getNextSwapInfo(
address[] calldata tokens,
PairIndexes[] calldata pairs,
bool calculatePrivilegedAvailability,
bytes calldata oracleData
) external view returns (SwapInfo memory swapInformation);
/**
* @notice Executes a flash swap
* @dev Will revert with:
* - With InvalidTokens if tokens are not sorted, or if there are duplicates
* - With InvalidPairs if pairs are not sorted (first by indexTokenA and then indexTokenB), or if indexTokenA >= indexTokenB for any pair
* - With Paused if swaps are paused by protocol
* - With NoSwapsToExecute if there are no swaps to execute for the given pairs
* - With LiquidityNotReturned if the required tokens were not back during the callback
* @param tokens The tokens involved in the next swap
* @param pairsToSwap The pairs that you want to swap. Each element of the list points to the index of the token in the tokens array
* @param rewardRecipient The address to send the reward to
* @param callbackHandler Address to call for callback (and send the borrowed tokens to)
* @param borrow How much to borrow of each of the tokens in tokens. The amount must match the position of the token in the tokens array
* @param callbackData Bytes to send to the caller during the callback
* @param oracleData Bytes to send to the oracle when executing a quote
* @return Information about the executed swap
*/
function swap(
address[] calldata tokens,
PairIndexes[] calldata pairsToSwap,
address rewardRecipient,
address callbackHandler,
uint256[] calldata borrow,
bytes calldata callbackData,
bytes calldata oracleData
) external returns (SwapInfo memory);
}
/**
* @title The interface for handling all configuration
* @notice This contract will manage configuration that affects all pairs, swappers, etc
*/
interface IDCAHubConfigHandler {
/**
* @notice Emitted when a new oracle is set
* @param oracle The new oracle contract
*/
event OracleSet(ITokenPriceOracle oracle);
/**
* @notice Emitted when a new swap fee is set
* @param feeSet The new swap fee
*/
event SwapFeeSet(uint32 feeSet);
/**
* @notice Emitted when new swap intervals are allowed
* @param swapIntervals The new swap intervals
*/
event SwapIntervalsAllowed(uint32[] swapIntervals);
/**
* @notice Emitted when some swap intervals are no longer allowed
* @param swapIntervals The swap intervals that are no longer allowed
*/
event SwapIntervalsForbidden(uint32[] swapIntervals);
/**
* @notice Emitted when a new platform fee ratio is set
* @param platformFeeRatio The new platform fee ratio
*/
event PlatformFeeRatioSet(uint16 platformFeeRatio);
/**
* @notice Emitted when allowed states of tokens are updated
* @param tokens Array of updated tokens
* @param allowed Array of new allow state per token were allowed[i] is the updated state of tokens[i]
*/
event TokensAllowedUpdated(address[] tokens, bool[] allowed);
/// @notice Thrown when trying to interact with an unallowed token
error UnallowedToken();
/// @notice Thrown when set allowed tokens input is not valid
error InvalidAllowedTokensInput();
/// @notice Thrown when trying to set a fee higher than the maximum allowed
error HighFee();
/// @notice Thrown when trying to set a fee that is not multiple of 100
error InvalidFee();
/// @notice Thrown when trying to set a fee ratio that is higher that the maximum allowed
error HighPlatformFeeRatio();
/**
* @notice Returns the max fee ratio that can be set
* @dev Cannot be modified
* @return The maximum possible value
*/
// solhint-disable-next-line func-name-mixedcase
function MAX_PLATFORM_FEE_RATIO() external view returns (uint16);
/**
* @notice Returns the fee charged on swaps
* @return swapFee The fee itself
*/
function swapFee() external view returns (uint32 swapFee);
/**
* @notice Returns the price oracle contract
* @return oracle The contract itself
*/
function oracle() external view returns (ITokenPriceOracle oracle);
/**
* @notice Returns how much will the platform take from the fees collected in swaps
* @return The current ratio
*/
function platformFeeRatio() external view returns (uint16);
/**
* @notice Returns the max fee that can be set for swaps
* @dev Cannot be modified
* @return maxFee The maximum possible fee
*/
// solhint-disable-next-line func-name-mixedcase
function MAX_FEE() external view returns (uint32 maxFee);
/**
* @notice Returns a byte that represents allowed swap intervals
* @return allowedSwapIntervals The allowed swap intervals
*/
function allowedSwapIntervals() external view returns (bytes1 allowedSwapIntervals);
/**
* @notice Returns if a token is currently allowed or not
* @return Allowed state of token
*/
function allowedTokens(address token) external view returns (bool);
/**
* @notice Returns token's magnitude (10**decimals)
* @return Stored magnitude for token
*/
function tokenMagnitude(address token) external view returns (uint120);
/**
* @notice Returns whether swaps and deposits are currently paused
* @return isPaused Whether swaps and deposits are currently paused
*/
function paused() external view returns (bool isPaused);
/**
* @notice Sets a new swap fee
* @dev Will revert with HighFee if the fee is higher than the maximum
* @dev Will revert with InvalidFee if the fee is not multiple of 100
* @param fee The new swap fee
*/
function setSwapFee(uint32 fee) external;
/**
* @notice Sets a new price oracle
* @dev Will revert with ZeroAddress if the zero address is passed
* @param oracle The new oracle contract
*/
function setOracle(ITokenPriceOracle oracle) external;
/**
* @notice Sets a new platform fee ratio
* @dev Will revert with HighPlatformFeeRatio if given ratio is too high
* @param platformFeeRatio The new ratio
*/
function setPlatformFeeRatio(uint16 platformFeeRatio) external;
/**
* @notice Adds new swap intervals to the allowed list
* @param swapIntervals The new swap intervals
*/
function addSwapIntervalsToAllowedList(uint32[] calldata swapIntervals) external;
/**
* @notice Removes some swap intervals from the allowed list
* @param swapIntervals The swap intervals to remove
*/
function removeSwapIntervalsFromAllowedList(uint32[] calldata swapIntervals) external;
/// @notice Pauses all swaps and deposits
function pause() external;
/// @notice Unpauses all swaps and deposits
function unpause() external;
}
/**
* @title The interface for handling platform related actions
* @notice This contract will handle all actions that affect the platform in some way
*/
interface IDCAHubPlatformHandler {
/**
* @notice Emitted when someone withdraws from the paltform balance
* @param sender The address of the user that initiated the withdraw
* @param recipient The address that received the withdraw
* @param amounts The tokens (and the amount) that were withdrawn
*/
event WithdrewFromPlatform(address indexed sender, address indexed recipient, IDCAHub.AmountOfToken[] amounts);
/**
* @notice Withdraws tokens from the platform balance
* @param amounts The amounts to withdraw
* @param recipient The address that will receive the tokens
*/
function withdrawFromPlatformBalance(IDCAHub.AmountOfToken[] calldata amounts, address recipient) external;
}
interface IDCAHub is IDCAHubParameters, IDCAHubConfigHandler, IDCAHubSwapHandler, IDCAHubPositionHandler, IDCAHubPlatformHandler {
/// @notice Specifies an amount of a token. For example to determine how much to borrow from certain tokens
struct AmountOfToken {
// The tokens' address
address token;
// How much to borrow or withdraw of the specified token
uint256 amount;
}
/// @notice Thrown when one of the parameters is a zero address
error ZeroAddress();
/// @notice Thrown when the expected liquidity is not returned in flash swaps
error LiquidityNotReturned();
/// @notice Thrown when a list of token pairs is not sorted, or if there are duplicates
error InvalidTokens();
}
Contract Source Code
File 9 of 20: IDCAHubPositionDescriptor.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.7 <0.9.0;
/**
* @title The interface for generating a description for a position in a DCA Hub
* @notice Contracts that implement this interface must return a base64 JSON with the entire description
*/
interface IDCAHubPositionDescriptor {
/**
* @notice Generates a positions's description, both the JSON and the image inside
* @param hub The address of the DCA Hub
* @param positionId The token/position id
* @return description The position's description
*/
function tokenURI(address hub, uint256 positionId) external view returns (string memory description);
}
Contract Source Code
File 10 of 20: IDCAPermissionManager.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.7 <0.9.0;
import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import '@mean-finance/nft-descriptors/solidity/interfaces/IDCAHubPositionDescriptor.sol';
interface IERC721BasicEnumerable {
/**
* @notice Count NFTs tracked by this contract
* @return A count of valid NFTs tracked by this contract, where each one of
* them has an assigned and queryable owner not equal to the zero address
*/
function totalSupply() external view returns (uint256);
}
/**
* @title The interface for all permission related matters
* @notice These methods allow users to set and remove permissions to their positions
*/
interface IDCAPermissionManager is IERC721, IERC721BasicEnumerable {
/// @notice Set of possible permissions
enum Permission {
INCREASE,
REDUCE,
WITHDRAW,
TERMINATE
}
/// @notice A set of permissions for a specific operator
struct PermissionSet {
// The address of the operator
address operator;
// The permissions given to the overator
Permission[] permissions;
}
/// @notice A collection of permissions sets for a specific position
struct PositionPermissions {
// The id of the token
uint256 tokenId;
// The permissions to assign to the position
PermissionSet[] permissionSets;
}
/**
* @notice Emitted when permissions for a token are modified
* @param tokenId The id of the token
* @param permissions The set of permissions that were updated
*/
event Modified(uint256 tokenId, PermissionSet[] permissions);
/**
* @notice Emitted when the address for a new descritor is set
* @param descriptor The new descriptor contract
*/
event NFTDescriptorSet(IDCAHubPositionDescriptor descriptor);
/// @notice Thrown when a user tries to set the hub, once it was already set
error HubAlreadySet();
/// @notice Thrown when a user provides a zero address when they shouldn't
error ZeroAddress();
/// @notice Thrown when a user calls a method that can only be executed by the hub
error OnlyHubCanExecute();
/// @notice Thrown when a user tries to modify permissions for a token they do not own
error NotOwner();
/// @notice Thrown when a user tries to execute a permit with an expired deadline
error ExpiredDeadline();
/// @notice Thrown when a user tries to execute a permit with an invalid signature
error InvalidSignature();
/**
* @notice The permit typehash used in the permit signature
* @return The typehash for the permit
*/
// solhint-disable-next-line func-name-mixedcase
function PERMIT_TYPEHASH() external pure returns (bytes32);
/**
* @notice The permit typehash used in the permission permit signature
* @return The typehash for the permission permit
*/
// solhint-disable-next-line func-name-mixedcase
function PERMISSION_PERMIT_TYPEHASH() external pure returns (bytes32);
/**
* @notice The permit typehash used in the multi permission permit signature
* @return The typehash for the multi permission permit
*/
// solhint-disable-next-line func-name-mixedcase
function MULTI_PERMISSION_PERMIT_TYPEHASH() external pure returns (bytes32);
/**
* @notice The permit typehash used in the permission permit signature
* @return The typehash for the permission set
*/
// solhint-disable-next-line func-name-mixedcase
function PERMISSION_SET_TYPEHASH() external pure returns (bytes32);
/**
* @notice The permit typehash used in the multi permission permit signature
* @return The typehash for the position permissions
*/
// solhint-disable-next-line func-name-mixedcase
function POSITION_PERMISSIONS_TYPEHASH() external pure returns (bytes32);
/**
* @notice The domain separator used in the permit signature
* @return The domain seperator used in encoding of permit signature
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
/**
* @notice Returns the NFT descriptor contract
* @return The contract for the NFT descriptor
*/
function nftDescriptor() external returns (IDCAHubPositionDescriptor);
/**
* @notice Returns the address of the DCA Hub
* @return The address of the DCA Hub
*/
function hub() external returns (address);
/**
* @notice Returns the next nonce to use for a given user
* @param user The address of the user
* @return nonce The next nonce to use
*/
function nonces(address user) external returns (uint256 nonce);
/**
* @notice Returns whether the given address has the permission for the given token
* @param id The id of the token to check
* @param account The address of the user to check
* @param permission The permission to check
* @return Whether the user has the permission or not
*/
function hasPermission(
uint256 id,
address account,
Permission permission
) external view returns (bool);
/**
* @notice Returns whether the given address has the permissions for the given token
* @param id The id of the token to check
* @param account The address of the user to check
* @param permissions The permissions to check
* @return hasPermissions Whether the user has each permission or not
*/
function hasPermissions(
uint256 id,
address account,
Permission[] calldata permissions
) external view returns (bool[] memory hasPermissions);
/**
* @notice Sets the address for the hub
* @dev Can only be successfully executed once. Once it's set, it can be modified again
* Will revert:
* - With ZeroAddress if address is zero
* - With HubAlreadySet if the hub has already been set
* @param hub The address to set for the hub
*/
function setHub(address hub) external;
/**
* @notice Mints a new NFT with the given id, and sets the permissions for it
* @dev Will revert with OnlyHubCanExecute if the caller is not the hub
* @param id The id of the new NFT
* @param owner The owner of the new NFT
* @param permissions Permissions to set for the new NFT
*/
function mint(
uint256 id,
address owner,
PermissionSet[] calldata permissions
) external;
/**
* @notice Burns the NFT with the given id, and clears all permissions
* @dev Will revert with OnlyHubCanExecute if the caller is not the hub
* @param id The token's id
*/
function burn(uint256 id) external;
/**
* @notice Sets new permissions for the given position
* @dev Will revert with NotOwner if the caller is not the token's owner.
* Operators that are not part of the given permission sets do not see their permissions modified.
* In order to remove permissions to an operator, provide an empty list of permissions for them
* @param id The token's id
* @param permissions A list of permission sets
*/
function modify(uint256 id, PermissionSet[] calldata permissions) external;
/**
* @notice Sets new permissions for the given positions
* @dev This is basically the same as executing multiple `modify`
* @param permissions A list of position permissions to set
*/
function modifyMany(PositionPermissions[] calldata permissions) external;
/**
* @notice Approves spending of a specific token ID by spender via signature
* @param spender The account that is being approved
* @param tokenId The ID of the token that is being approved for spending
* @param deadline The deadline timestamp by which the call must be mined for the approve to work
* @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
* @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
* @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
*/
function permit(
address spender,
uint256 tokenId,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @notice Sets permissions via signature
* @dev This method works similarly to `modifyMany`, but instead of being executed by the owner, it can be set by signature
* @param permissions The permissions to set for the different positions
* @param deadline The deadline timestamp by which the call must be mined for the approve to work
* @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
* @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
* @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
*/
function multiPermissionPermit(
PositionPermissions[] calldata permissions,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @notice Sets permissions via signature
* @dev This method works similarly to `modify`, but instead of being executed by the owner, it can be set my signature
* @param permissions The permissions to set
* @param tokenId The token's id
* @param deadline The deadline timestamp by which the call must be mined for the approve to work
* @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
* @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
* @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
*/
function permissionPermit(
PermissionSet[] calldata permissions,
uint256 tokenId,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @notice Sets a new NFT descriptor
* @dev Will revert with ZeroAddress if address is zero
* @param descriptor The new NFT descriptor contract
*/
function setNFTDescriptor(IDCAHubPositionDescriptor descriptor) external;
}
Contract Source Code
File 11 of 20: IERC165.sol
// 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);
}
Contract Source Code
File 12 of 20: IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}
Contract Source Code
File 13 of 20: IERC20Metadata.sol
// 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);
}
Contract Source Code
File 14 of 20: IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
}
Contract Source Code
File 15 of 20: IERC721Metadata.sol
// 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);
}
Contract Source Code
File 16 of 20: IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
Contract Source Code
File 17 of 20: ITokenPriceOracle.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/**
* @title The interface for an oracle that provides price quotes
* @notice These methods allow users to add support for pairs, and then ask for quotes
*/
interface ITokenPriceOracle {
/// @notice Thrown when trying to add support for a pair that cannot be supported
error PairCannotBeSupported(address tokenA, address tokenB);
/// @notice Thrown when trying to execute a quote with a pair that isn't supported yet
error PairNotSupportedYet(address tokenA, address tokenB);
/**
* @notice Returns whether this oracle can support the given pair of tokens
* @dev tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order
* @param tokenA One of the pair's tokens
* @param tokenB The other of the pair's tokens
* @return Whether the given pair of tokens can be supported by the oracle
*/
function canSupportPair(address tokenA, address tokenB) external view returns (bool);
/**
* @notice Returns whether this oracle is already supporting the given pair of tokens
* @dev tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order
* @param tokenA One of the pair's tokens
* @param tokenB The other of the pair's tokens
* @return Whether the given pair of tokens is already being supported by the oracle
*/
function isPairAlreadySupported(address tokenA, address tokenB) external view returns (bool);
/**
* @notice Returns a quote, based on the given tokens and amount
* @dev Will revert if pair isn't supported
* @param tokenIn The token that will be provided
* @param amountIn The amount that will be provided
* @param tokenOut The token we would like to quote
* @param data Custom data that the oracle might need to operate
* @return amountOut How much `tokenOut` will be returned in exchange for `amountIn` amount of `tokenIn`
*/
function quote(
address tokenIn,
uint256 amountIn,
address tokenOut,
bytes calldata data
) external view returns (uint256 amountOut);
/**
* @notice Add or reconfigures the support for a given pair. This function will let the oracle take some actions
* to configure the pair, in preparation for future quotes. Can be called many times in order to let the oracle
* re-configure for a new context
* @dev Will revert if pair cannot be supported. tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order
* @param tokenA One of the pair's tokens
* @param tokenB The other of the pair's tokens
* @param data Custom data that the oracle might need to operate
*/
function addOrModifySupportForPair(
address tokenA,
address tokenB,
bytes calldata data
) external;
/**
* @notice Adds support for a given pair if the oracle didn't support it already. If called for a pair that is already supported,
* then nothing will happen. This function will let the oracle take some actions to configure the pair, in preparation
* for future quotes
* @dev Will revert if pair cannot be supported. tokenA and tokenB may be passed in either tokenA/tokenB or tokenB/tokenA order
* @param tokenA One of the pair's tokens
* @param tokenB The other of the pair's tokens
* @param data Custom data that the oracle might need to operate
*/
function addSupportForPairIfNeeded(
address tokenA,
address tokenB,
bytes calldata data
) external;
}
Contract Source Code
File 18 of 20: PermissionMath.sol
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.7 <0.9.0;
import '../interfaces/IDCAPermissionManager.sol';
/// @title Permission Math library
/// @notice Provides functions to easily convert from permissions to an int representation and viceversa
library PermissionMath {
/// @notice Takes a list of permissions and returns the int representation of the set that contains them all
/// @param _permissions The list of permissions
/// @return _representation The uint representation
function toUInt8(IDCAPermissionManager.Permission[] memory _permissions) internal pure returns (uint8 _representation) {
for (uint256 i = 0; i < _permissions.length; ) {
_representation |= uint8(1 << uint8(_permissions[i]));
unchecked {
i++;
}
}
}
/// @notice Takes an int representation of a set of permissions, and returns whether it contains the given permission
/// @param _representation The int representation
/// @param _permission The permission to check for
/// @return _hasPermission Whether the representation contains the given permission
function hasPermission(uint8 _representation, IDCAPermissionManager.Permission _permission) internal pure returns (bool _hasPermission) {
uint256 _bitMask = 1 << uint8(_permission);
_hasPermission = (_representation & _bitMask) != 0;
}
}
Contract Source Code
File 19 of 20: Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
}
Contract Source Code
File 20 of 20: draft-EIP712.sol
// 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);
}
}
Settings
{
"compilationTarget": {
"@mean-finance/dca-v2-core/contracts/DCAPermissionsManager/DCAPermissionsManager.sol": "DCAPermissionsManager"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 9999
},
"remappings": []
}ABI
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