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This contract's source code is verified!
Contract Metadata
Compiler
0.8.13+commit.abaa5c0e
Language
Solidity
Contract Source Code
File 1 of 1: AggregatedFinance.sol
// File: contracts/IUniswapV2Factory.sol
pragma solidity 0.8.13;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// File: contracts/utils/SafeCast.sol
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeCast.sol)
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted uint224 from uint256, reverting on
* overflow (when the input is greater than largest uint224).
*
* Counterpart to Solidity's `uint224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*/
function toUint224(uint256 value) internal pure returns (uint224) {
require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
return uint224(value);
}
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint96 from uint256, reverting on
* overflow (when the input is greater than largest uint96).
*
* Counterpart to Solidity's `uint96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*/
function toUint96(uint256 value) internal pure returns (uint96) {
require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
return uint96(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128) {
require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
return int128(value);
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64) {
require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
return int64(value);
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32) {
require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
return int32(value);
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16) {
require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
return int16(value);
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8) {
require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
return int8(value);
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
// Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
// File: contracts/extensions/IVotes.sol
// OpenZeppelin Contracts (last updated v4.5.0) (governance/utils/IVotes.sol)
pragma solidity ^0.8.0;
/**
* @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.
*
* _Available since v4.5._
*/
interface IVotes {
/**
* @dev Emitted when an account changes their delegate.
*/
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/**
* @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes.
*/
event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);
/**
* @dev Returns the current amount of votes that `account` has.
*/
function getVotes(address account) external view returns (uint256);
/**
* @dev Returns the amount of votes that `account` had at the end of a past block (`blockNumber`).
*/
function getPastVotes(address account, uint256 blockNumber) external view returns (uint256);
/**
* @dev Returns the total supply of votes available at the end of a past block (`blockNumber`).
*
* NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.
* Votes that have not been delegated are still part of total supply, even though they would not participate in a
* vote.
*/
function getPastTotalSupply(uint256 blockNumber) external view returns (uint256);
/**
* @dev Returns the delegate that `account` has chosen.
*/
function delegates(address account) external view returns (address);
/**
* @dev Delegates votes from the sender to `delegatee`.
*/
function delegate(address delegatee) external;
/**
* @dev Delegates votes from signer to `delegatee`.
*/
function delegateBySig(
address delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
// File: contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: contracts/utils/ECDSA.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = 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));
}
}
// File: contracts/utils/draft-EIP712.sol
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
}
// File: contracts/extensions/draft-IERC20Permit.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// File: contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// File: contracts/utils/Math.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a / b + (a % b == 0 ? 0 : 1);
}
}
// File: contracts/utils/Arrays.sol
// OpenZeppelin Contracts v4.4.1 (utils/Arrays.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to array types.
*/
library Arrays {
/**
* @dev Searches a sorted `array` and returns the first index that contains
* a value greater or equal to `element`. If no such index exists (i.e. all
* values in the array are strictly less than `element`), the array length is
* returned. Time complexity O(log n).
*
* `array` is expected to be sorted in ascending order, and to contain no
* repeated elements.
*/
function findUpperBound(uint256[] storage array, uint256 element) internal view returns (uint256) {
if (array.length == 0) {
return 0;
}
uint256 low = 0;
uint256 high = array.length;
while (low < high) {
uint256 mid = Math.average(low, high);
// Note that mid will always be strictly less than high (i.e. it will be a valid array index)
// because Math.average rounds down (it does integer division with truncation).
if (array[mid] > element) {
high = mid;
} else {
low = mid + 1;
}
}
// At this point `low` is the exclusive upper bound. We will return the inclusive upper bound.
if (low > 0 && array[low - 1] == element) {
return low - 1;
} else {
return low;
}
}
}
// File: contracts/extensions/Context.sol
// 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;
}
}
// File: contracts/extensions/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: contracts/extensions/IUniswapV2Router01.sol
pragma solidity ^0.8.0;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// File: contracts/extensions/IUniswapV2Router02.sol
pragma solidity ^0.8.0;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
// File: contracts/extensions/IERC20.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `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);
/**
* @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);
}
// File: contracts/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
// File: contracts/extensions/ERC20.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens 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 amount
) 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, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: contracts/extensions/draft-ERC20Permit.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-ERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* _Available since v3.4._
*/
abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 {
using Counters for Counters.Counter;
mapping(address => Counters.Counter) private _nonces;
// solhint-disable-next-line var-name-mixedcase
bytes32 private immutable _PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/**
* @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
*
* It's a good idea to use the same `name` that is defined as the ERC20 token name.
*/
constructor(string memory name) EIP712(name, "1") {}
/**
* @dev See {IERC20Permit-permit}.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override {
require(block.timestamp <= deadline, "ERC20Permit: expired deadline");
bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
require(signer == owner, "ERC20Permit: invalid signature");
_approve(owner, spender, value);
}
/**
* @dev See {IERC20Permit-nonces}.
*/
function nonces(address owner) public view virtual override returns (uint256) {
return _nonces[owner].current();
}
/**
* @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view override returns (bytes32) {
return _domainSeparatorV4();
}
/**
* @dev "Consume a nonce": return the current value and increment.
*
* _Available since v4.1._
*/
function _useNonce(address owner) internal virtual returns (uint256 current) {
Counters.Counter storage nonce = _nonces[owner];
current = nonce.current();
nonce.increment();
}
}
// File: contracts/extensions/ERC20Votes.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Votes.sol)
pragma solidity ^0.8.0;
/**
* @dev Extension of ERC20 to support Compound-like voting and delegation. This version is more generic than Compound's,
* and supports token supply up to 2^224^ - 1, while COMP is limited to 2^96^ - 1.
*
* NOTE: If exact COMP compatibility is required, use the {ERC20VotesComp} variant of this module.
*
* This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either
* by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting
* power can be queried through the public accessors {getVotes} and {getPastVotes}.
*
* By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it
* requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked.
*
* _Available since v4.2._
*/
abstract contract ERC20Votes is IVotes, ERC20Permit {
struct Checkpoint {
uint32 fromBlock;
uint224 votes;
}
bytes32 private constant _DELEGATION_TYPEHASH =
keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
mapping(address => address) private _delegates;
mapping(address => Checkpoint[]) private _checkpoints;
Checkpoint[] private _totalSupplyCheckpoints;
/**
* @dev Get the `pos`-th checkpoint for `account`.
*/
function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory) {
return _checkpoints[account][pos];
}
/**
* @dev Get number of checkpoints for `account`.
*/
function numCheckpoints(address account) public view virtual returns (uint32) {
return SafeCast.toUint32(_checkpoints[account].length);
}
/**
* @dev Get the address `account` is currently delegating to.
*/
function delegates(address account) public view virtual override returns (address) {
return _delegates[account];
}
/**
* @dev Gets the current votes balance for `account`
*/
function getVotes(address account) public view virtual override returns (uint256) {
uint256 pos = _checkpoints[account].length;
return pos == 0 ? 0 : _checkpoints[account][pos - 1].votes;
}
/**
* @dev Retrieve the number of votes for `account` at the end of `blockNumber`.
*
* Requirements:
*
* - `blockNumber` must have been already mined
*/
function getPastVotes(address account, uint256 blockNumber) public view virtual override returns (uint256) {
require(blockNumber < block.number, "ERC20Votes: block not yet mined");
return _checkpointsLookup(_checkpoints[account], blockNumber);
}
/**
* @dev Retrieve the `totalSupply` at the end of `blockNumber`. Note, this value is the sum of all balances.
* It is but NOT the sum of all the delegated votes!
*
* Requirements:
*
* - `blockNumber` must have been already mined
*/
function getPastTotalSupply(uint256 blockNumber) public view virtual override returns (uint256) {
require(blockNumber < block.number, "ERC20Votes: block not yet mined");
return _checkpointsLookup(_totalSupplyCheckpoints, blockNumber);
}
/**
* @dev Lookup a value in a list of (sorted) checkpoints.
*/
function _checkpointsLookup(Checkpoint[] storage ckpts, uint256 blockNumber) private view returns (uint256) {
// We run a binary search to look for the earliest checkpoint taken after `blockNumber`.
//
// During the loop, the index of the wanted checkpoint remains in the range [low-1, high).
// With each iteration, either `low` or `high` is moved towards the middle of the range to maintain the invariant.
// - If the middle checkpoint is after `blockNumber`, we look in [low, mid)
// - If the middle checkpoint is before or equal to `blockNumber`, we look in [mid+1, high)
// Once we reach a single value (when low == high), we've found the right checkpoint at the index high-1, if not
// out of bounds (in which case we're looking too far in the past and the result is 0).
// Note that if the latest checkpoint available is exactly for `blockNumber`, we end up with an index that is
// past the end of the array, so we technically don't find a checkpoint after `blockNumber`, but it works out
// the same.
uint256 high = ckpts.length;
uint256 low = 0;
while (low < high) {
uint256 mid = Math.average(low, high);
if (ckpts[mid].fromBlock > blockNumber) {
high = mid;
} else {
low = mid + 1;
}
}
return high == 0 ? 0 : ckpts[high - 1].votes;
}
/**
* @dev Delegate votes from the sender to `delegatee`.
*/
function delegate(address delegatee) public virtual override {
_delegate(_msgSender(), delegatee);
}
/**
* @dev Delegates votes from signer to `delegatee`
*/
function delegateBySig(
address delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override {
require(block.timestamp <= expiry, "ERC20Votes: signature expired");
address signer = ECDSA.recover(
_hashTypedDataV4(keccak256(abi.encode(_DELEGATION_TYPEHASH, delegatee, nonce, expiry))),
v,
r,
s
);
require(nonce == _useNonce(signer), "ERC20Votes: invalid nonce");
_delegate(signer, delegatee);
}
/**
* @dev Maximum token supply. Defaults to `type(uint224).max` (2^224^ - 1).
*/
function _maxSupply() internal view virtual returns (uint224) {
return type(uint224).max;
}
/**
* @dev Snapshots the totalSupply after it has been increased.
*/
function _mint(address account, uint256 amount) internal virtual override {
super._mint(account, amount);
require(totalSupply() <= _maxSupply(), "ERC20Votes: total supply risks overflowing votes");
_writeCheckpoint(_totalSupplyCheckpoints, _add, amount);
}
/**
* @dev Snapshots the totalSupply after it has been decreased.
*/
function _burn(address account, uint256 amount) internal virtual override {
super._burn(account, amount);
_writeCheckpoint(_totalSupplyCheckpoints, _subtract, amount);
}
/**
* @dev Move voting power when tokens are transferred.
*
* Emits a {DelegateVotesChanged} event.
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._afterTokenTransfer(from, to, amount);
_moveVotingPower(delegates(from), delegates(to), amount);
}
/**
* @dev Change delegation for `delegator` to `delegatee`.
*
* Emits events {DelegateChanged} and {DelegateVotesChanged}.
*/
function _delegate(address delegator, address delegatee) internal virtual {
address currentDelegate = delegates(delegator);
uint256 delegatorBalance = balanceOf(delegator);
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveVotingPower(currentDelegate, delegatee, delegatorBalance);
}
function _moveVotingPower(
address src,
address dst,
uint256 amount
) private {
if (src != dst && amount > 0) {
if (src != address(0)) {
(uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[src], _subtract, amount);
emit DelegateVotesChanged(src, oldWeight, newWeight);
}
if (dst != address(0)) {
(uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[dst], _add, amount);
emit DelegateVotesChanged(dst, oldWeight, newWeight);
}
}
}
function _writeCheckpoint(
Checkpoint[] storage ckpts,
function(uint256, uint256) view returns (uint256) op,
uint256 delta
) private returns (uint256 oldWeight, uint256 newWeight) {
uint256 pos = ckpts.length;
oldWeight = pos == 0 ? 0 : ckpts[pos - 1].votes;
newWeight = op(oldWeight, delta);
if (pos > 0 && ckpts[pos - 1].fromBlock == block.number) {
ckpts[pos - 1].votes = SafeCast.toUint224(newWeight);
} else {
ckpts.push(Checkpoint({fromBlock: SafeCast.toUint32(block.number), votes: SafeCast.toUint224(newWeight)}));
}
}
function _add(uint256 a, uint256 b) private pure returns (uint256) {
return a + b;
}
function _subtract(uint256 a, uint256 b) private pure returns (uint256) {
return a - b;
}
}
// File: contracts/extensions/ERC20Snapshot.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/ERC20Snapshot.sol)
pragma solidity ^0.8.0;
/**
* @dev This contract extends an ERC20 token with a snapshot mechanism. When a snapshot is created, the balances and
* total supply at the time are recorded for later access.
*
* This can be used to safely create mechanisms based on token balances such as trustless dividends or weighted voting.
* In naive implementations it's possible to perform a "double spend" attack by reusing the same balance from different
* accounts. By using snapshots to calculate dividends or voting power, those attacks no longer apply. It can also be
* used to create an efficient ERC20 forking mechanism.
*
* Snapshots are created by the internal {_snapshot} function, which will emit the {Snapshot} event and return a
* snapshot id. To get the total supply at the time of a snapshot, call the function {totalSupplyAt} with the snapshot
* id. To get the balance of an account at the time of a snapshot, call the {balanceOfAt} function with the snapshot id
* and the account address.
*
* NOTE: Snapshot policy can be customized by overriding the {_getCurrentSnapshotId} method. For example, having it
* return `block.number` will trigger the creation of snapshot at the begining of each new block. When overridding this
* function, be careful about the monotonicity of its result. Non-monotonic snapshot ids will break the contract.
*
* Implementing snapshots for every block using this method will incur significant gas costs. For a gas-efficient
* alternative consider {ERC20Votes}.
*
* ==== Gas Costs
*
* Snapshots are efficient. Snapshot creation is _O(1)_. Retrieval of balances or total supply from a snapshot is _O(log
* n)_ in the number of snapshots that have been created, although _n_ for a specific account will generally be much
* smaller since identical balances in subsequent snapshots are stored as a single entry.
*
* There is a constant overhead for normal ERC20 transfers due to the additional snapshot bookkeeping. This overhead is
* only significant for the first transfer that immediately follows a snapshot for a particular account. Subsequent
* transfers will have normal cost until the next snapshot, and so on.
*/
abstract contract ERC20Snapshot is ERC20 {
// Inspired by Jordi Baylina's MiniMeToken to record historical balances:
// https://github.com/Giveth/minimd/blob/ea04d950eea153a04c51fa510b068b9dded390cb/contracts/MiniMeToken.sol
using Arrays for uint256[];
using Counters for Counters.Counter;
// Snapshotted values have arrays of ids and the value corresponding to that id. These could be an array of a
// Snapshot struct, but that would impede usage of functions that work on an array.
struct Snapshots {
uint256[] ids;
uint256[] values;
}
mapping(address => Snapshots) private _accountBalanceSnapshots;
Snapshots private _totalSupplySnapshots;
// Snapshot ids increase monotonically, with the first value being 1. An id of 0 is invalid.
Counters.Counter private _currentSnapshotId;
/**
* @dev Emitted by {_snapshot} when a snapshot identified by `id` is created.
*/
event Snapshot(uint256 id);
/**
* @dev Creates a new snapshot and returns its snapshot id.
*
* Emits a {Snapshot} event that contains the same id.
*
* {_snapshot} is `internal` and you have to decide how to expose it externally. Its usage may be restricted to a
* set of accounts, for example using {AccessControl}, or it may be open to the public.
*
* [WARNING]
* ====
* While an open way of calling {_snapshot} is required for certain trust minimization mechanisms such as forking,
* you must consider that it can potentially be used by attackers in two ways.
*
* First, it can be used to increase the cost of retrieval of values from snapshots, although it will grow
* logarithmically thus rendering this attack ineffective in the long term. Second, it can be used to target
* specific accounts and increase the cost of ERC20 transfers for them, in the ways specified in the Gas Costs
* section above.
*
* We haven't measured the actual numbers; if this is something you're interested in please reach out to us.
* ====
*/
function _snapshot() internal virtual returns (uint256) {
_currentSnapshotId.increment();
uint256 currentId = _getCurrentSnapshotId();
emit Snapshot(currentId);
return currentId;
}
/**
* @dev Get the current snapshotId
*/
function _getCurrentSnapshotId() internal view virtual returns (uint256) {
return _currentSnapshotId.current();
}
/**
* @dev Retrieves the balance of `account` at the time `snapshotId` was created.
*/
function balanceOfAt(address account, uint256 snapshotId) public view virtual returns (uint256) {
(bool snapshotted, uint256 value) = _valueAt(snapshotId, _accountBalanceSnapshots[account]);
return snapshotted ? value : balanceOf(account);
}
/**
* @dev Retrieves the total supply at the time `snapshotId` was created.
*/
function totalSupplyAt(uint256 snapshotId) public view virtual returns (uint256) {
(bool snapshotted, uint256 value) = _valueAt(snapshotId, _totalSupplySnapshots);
return snapshotted ? value : totalSupply();
}
// Update balance and/or total supply snapshots before the values are modified. This is implemented
// in the _beforeTokenTransfer hook, which is executed for _mint, _burn, and _transfer operations.
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
if (from == address(0)) {
// mint
_updateAccountSnapshot(to);
_updateTotalSupplySnapshot();
} else if (to == address(0)) {
// burn
_updateAccountSnapshot(from);
_updateTotalSupplySnapshot();
} else {
// transfer
_updateAccountSnapshot(from);
_updateAccountSnapshot(to);
}
}
function _valueAt(uint256 snapshotId, Snapshots storage snapshots) private view returns (bool, uint256) {
require(snapshotId > 0, "ERC20Snapshot: id is 0");
require(snapshotId <= _getCurrentSnapshotId(), "ERC20Snapshot: nonexistent id");
// When a valid snapshot is queried, there are three possibilities:
// a) The queried value was not modified after the snapshot was taken. Therefore, a snapshot entry was never
// created for this id, and all stored snapshot ids are smaller than the requested one. The value that corresponds
// to this id is the current one.
// b) The queried value was modified after the snapshot was taken. Therefore, there will be an entry with the
// requested id, and its value is the one to return.
// c) More snapshots were created after the requested one, and the queried value was later modified. There will be
// no entry for the requested id: the value that corresponds to it is that of the smallest snapshot id that is
// larger than the requested one.
//
// In summary, we need to find an element in an array, returning the index of the smallest value that is larger if
// it is not found, unless said value doesn't exist (e.g. when all values are smaller). Arrays.findUpperBound does
// exactly this.
uint256 index = snapshots.ids.findUpperBound(snapshotId);
if (index == snapshots.ids.length) {
return (false, 0);
} else {
return (true, snapshots.values[index]);
}
}
function _updateAccountSnapshot(address account) private {
_updateSnapshot(_accountBalanceSnapshots[account], balanceOf(account));
}
function _updateTotalSupplySnapshot() private {
_updateSnapshot(_totalSupplySnapshots, totalSupply());
}
function _updateSnapshot(Snapshots storage snapshots, uint256 currentValue) private {
uint256 currentId = _getCurrentSnapshotId();
if (_lastSnapshotId(snapshots.ids) < currentId) {
snapshots.ids.push(currentId);
snapshots.values.push(currentValue);
}
}
function _lastSnapshotId(uint256[] storage ids) private view returns (uint256) {
if (ids.length == 0) {
return 0;
} else {
return ids[ids.length - 1];
}
}
}
// File: contracts/extensions/ERC20Burnable.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)
pragma solidity ^0.8.0;
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
_spendAllowance(account, _msgSender(), amount);
_burn(account, amount);
}
}
// File: contracts/extensions/IRewardTracker.sol
pragma solidity ^0.8.13;
interface IRewardTracker is IERC20 {
event RewardsDistributed(address indexed from, uint256 weiAmount);
event RewardWithdrawn(address indexed to, uint256 weiAmount);
event ExcludeFromRewards(address indexed account, bool excluded);
event Claim(address indexed account, uint256 amount);
event Compound(address indexed account, uint256 amount, uint256 tokens);
event LogErrorString(string message);
struct AccountInfo {
address account;
uint256 withdrawableRewards;
uint256 totalRewards;
uint256 lastClaimTime;
}
receive() external payable;
function distributeRewards() external payable;
function setBalance(address payable account, uint256 newBalance) external;
function excludeFromRewards(address account, bool excluded) external;
function isExcludedFromRewards(address account) external view returns (bool);
function manualSendReward(uint256 amount, address holder) external;
function processAccount(address payable account) external returns (bool);
function compoundAccount(address payable account) external returns (bool);
function withdrawableRewardOf(address account) external view returns (uint256);
function withdrawnRewardOf(address account) external view returns (uint256);
function accumulativeRewardOf(address account) external view returns (uint256);
function getAccountInfo(address account) external view returns (address, uint256, uint256, uint256, uint256);
function getLastClaimTime(address account) external view returns (uint256);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view override returns (uint256);
function balanceOf(address account) external view override returns (uint256);
function transfer(address, uint256) external pure override returns (bool);
function allowance(address, address) external pure override returns (uint256);
function approve(address, uint256) external pure override returns (bool);
function transferFrom(address, address, uint256) external pure override returns (bool);
}
// File: contracts/RewardTracker.sol
pragma solidity ^0.8.13;
contract RewardTracker is IRewardTracker, Ownable {
address immutable UNISWAPROUTER;
string private constant _name = "AGFI_RewardTracker";
string private constant _symbol = "AGFI_RewardTracker";
uint256 public lastProcessedIndex;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
uint256 private constant magnitude = 2**128;
uint256 public immutable minTokenBalanceForRewards;
uint256 private magnifiedRewardPerShare;
uint256 public totalRewardsDistributed;
uint256 public totalRewardsWithdrawn;
address public immutable tokenAddress;
mapping(address => bool) public excludedFromRewards;
mapping(address => int256) private magnifiedRewardCorrections;
mapping(address => uint256) private withdrawnRewards;
mapping(address => uint256) private lastClaimTimes;
constructor(address _tokenAddress, address _uniswapRouter) {
minTokenBalanceForRewards = 1 * (10**9);
tokenAddress = _tokenAddress;
UNISWAPROUTER = _uniswapRouter;
}
receive() external override payable {
distributeRewards();
}
function distributeRewards() public override payable {
require(_totalSupply > 0, "Total supply invalid");
if (msg.value > 0) {
magnifiedRewardPerShare =
magnifiedRewardPerShare +
((msg.value * magnitude) / _totalSupply);
emit RewardsDistributed(msg.sender, msg.value);
totalRewardsDistributed += msg.value;
}
}
function setBalance(address payable account, uint256 newBalance)
external
override
onlyOwner
{
if (excludedFromRewards[account]) {
return;
}
if (newBalance >= minTokenBalanceForRewards) {
_setBalance(account, newBalance);
} else {
_setBalance(account, 0);
}
}
function excludeFromRewards(address account, bool excluded)
external
override
onlyOwner
{
require(
excludedFromRewards[account] != excluded,
"AGFI_RewardTracker: account already set to requested state"
);
excludedFromRewards[account] = excluded;
if (excluded) {
_setBalance(account, 0);
} else {
uint256 newBalance = IERC20(tokenAddress).balanceOf(account);
if (newBalance >= minTokenBalanceForRewards) {
_setBalance(account, newBalance);
} else {
_setBalance(account, 0);
}
}
emit ExcludeFromRewards(account, excluded);
}
function isExcludedFromRewards(address account) public override view returns (bool) {
return excludedFromRewards[account];
}
function manualSendReward(uint256 amount, address holder)
external
override
onlyOwner
{
uint256 contractETHBalance = address(this).balance;
(bool success, ) = payable(holder).call{
value: amount > 0 ? amount : contractETHBalance
}("");
require(success, "Manual send failed.");
}
function _setBalance(address account, uint256 newBalance) internal {
uint256 currentBalance = _balances[account];
if (newBalance > currentBalance) {
uint256 addAmount = newBalance - currentBalance;
_mint(account, addAmount);
} else if (newBalance < currentBalance) {
uint256 subAmount = currentBalance - newBalance;
_burn(account, subAmount);
}
}
function _mint(address account, uint256 amount) private {
require(
account != address(0),
"AGFI_RewardTracker: mint to the zero address"
);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
magnifiedRewardCorrections[account] =
magnifiedRewardCorrections[account] -
int256(magnifiedRewardPerShare * amount);
}
function _burn(address account, uint256 amount) private {
require(
account != address(0),
"AGFI_RewardTracker: burn from the zero address"
);
uint256 accountBalance = _balances[account];
require(
accountBalance >= amount,
"AGFI_RewardTracker: burn amount exceeds balance"
);
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
magnifiedRewardCorrections[account] =
magnifiedRewardCorrections[account] +
int256(magnifiedRewardPerShare * amount);
}
function processAccount(address payable account)
public
override
onlyOwner
returns (bool)
{
uint256 amount = _withdrawRewardOfUser(account);
if (amount > 0) {
lastClaimTimes[account] = block.timestamp;
emit Claim(account, amount);
return true;
}
return false;
}
function _withdrawRewardOfUser(address payable account)
private
returns (uint256)
{
uint256 _withdrawableReward = withdrawableRewardOf(account);
if (_withdrawableReward > 0) {
withdrawnRewards[account] += _withdrawableReward;
totalRewardsWithdrawn += _withdrawableReward;
(bool success, ) = account.call{value: _withdrawableReward}("");
if (!success) {
withdrawnRewards[account] -= _withdrawableReward;
totalRewardsWithdrawn -= _withdrawableReward;
emit LogErrorString("Withdraw failed");
return 0;
}
emit RewardWithdrawn(account, _withdrawableReward);
return _withdrawableReward;
}
return 0;
}
function compoundAccount(address payable account)
public
override
onlyOwner
returns (bool)
{
(uint256 amount, uint256 tokens) = _compoundRewardOfUser(account);
if (amount > 0) {
lastClaimTimes[account] = block.timestamp;
emit Compound(account, amount, tokens);
return true;
}
return false;
}
function _compoundRewardOfUser(address payable account)
private
returns (uint256, uint256)
{
uint256 _withdrawableReward = withdrawableRewardOf(account);
if (_withdrawableReward > 0) {
withdrawnRewards[account] += _withdrawableReward;
totalRewardsWithdrawn += _withdrawableReward;
IUniswapV2Router02 uniswapV2Router = IUniswapV2Router02(
UNISWAPROUTER
);
address[] memory path = new address[](2);
path[0] = uniswapV2Router.WETH();
path[1] = address(tokenAddress);
bool success;
uint256 tokens;
uint256 initTokenBal = IERC20(tokenAddress).balanceOf(account);
try
uniswapV2Router
.swapExactETHForTokensSupportingFeeOnTransferTokens{
value: _withdrawableReward
}(0, path, address(account), block.timestamp)
{
success = true;
tokens = IERC20(tokenAddress).balanceOf(account) - initTokenBal;
} catch Error(
string memory reason /*err*/
) {
emit LogErrorString(reason);
success = false;
}
if (!success) {
withdrawnRewards[account] -= _withdrawableReward;
totalRewardsWithdrawn -= _withdrawableReward;
emit LogErrorString("Withdraw failed");
return (0, 0);
}
emit RewardWithdrawn(account, _withdrawableReward);
return (_withdrawableReward, tokens);
}
return (0, 0);
}
function withdrawableRewardOf(address account)
public
override
view
returns (uint256)
{
return accumulativeRewardOf(account) - withdrawnRewards[account];
}
function withdrawnRewardOf(address account) public view returns (uint256) {
return withdrawnRewards[account];
}
function accumulativeRewardOf(address account)
public
override
view
returns (uint256)
{
int256 a = int256(magnifiedRewardPerShare * balanceOf(account));
int256 b = magnifiedRewardCorrections[account]; // this is an explicit int256 (signed)
return uint256(a + b) / magnitude;
}
function getAccountInfo(address account)
public
override
view
returns (
address,
uint256,
uint256,
uint256,
uint256
)
{
AccountInfo memory info;
info.account = account;
info.withdrawableRewards = withdrawableRewardOf(account);
info.totalRewards = accumulativeRewardOf(account);
info.lastClaimTime = lastClaimTimes[account];
return (
info.account,
info.withdrawableRewards,
info.totalRewards,
info.lastClaimTime,
totalRewardsWithdrawn
);
}
function getLastClaimTime(address account) public override view returns (uint256) {
return lastClaimTimes[account];
}
function name() public override pure returns (string memory) {
return _name;
}
function symbol() public override pure returns (string memory) {
return _symbol;
}
function decimals() public override pure returns (uint8) {
return 9;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address, uint256) public pure override returns (bool) {
revert("AGFI_RewardTracker: method not implemented");
}
function allowance(address, address)
public
pure
override
returns (uint256)
{
revert("AGFI_RewardTracker: method not implemented");
}
function approve(address, uint256) public pure override returns (bool) {
revert("AGFI_RewardTracker: method not implemented");
}
function transferFrom(
address,
address,
uint256
) public pure override returns (bool) {
revert("AGFI_RewardTracker: method not implemented");
}
}
// File: contracts/AggregatedFinance.sol
pragma solidity ^0.8.13;
/// @custom:security-contact team@aggregated.finance
contract AggregatedFinance is ERC20, ERC20Burnable, ERC20Snapshot, Ownable, ERC20Permit, ERC20Votes {
address constant UNISWAPROUTER = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// non-immutable reward tracker so it can be upgraded if needed
IRewardTracker public rewardTracker;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
mapping (address => uint256) private _balances;
mapping (address => mapping(address => uint256)) private _allowances;
mapping (address => bool) public _blacklist;
mapping (address => bool) private _isExcludedFromFees;
mapping (address => uint256) private _holderLastTransferTimestamp;
mapping (address => bool) public automatedMarketMakerPairs;
bool public limitsInEffect = true;
bool public transferDelayEnabled = true;
bool private swapping;
uint8 public swapIndex; // tracks which fee is being sold off
bool private isCompounding;
bool public transferTaxEnabled = false;
bool public swapEnabled = false;
bool public compoundingEnabled = true;
uint256 public lastSwapTime;
uint256 private launchedAt;
// Fee channel definitions. Enable each individually, and define tax rates for each.
bool public buyFeeC1Enabled = true;
bool public buyFeeC2Enabled = false;
bool public buyFeeC3Enabled = true;
bool public buyFeeC4Enabled = true;
bool public buyFeeC5Enabled = true;
bool public sellFeeC1Enabled = true;
bool public sellFeeC2Enabled = true;
bool public sellFeeC3Enabled = true;
bool public sellFeeC4Enabled = true;
bool public sellFeeC5Enabled = true;
bool public swapC1Enabled = true;
bool public swapC2Enabled = true;
bool public swapC3Enabled = true;
bool public swapC4Enabled = true;
bool public swapC5Enabled = true;
bool public c2BurningEnabled = true;
bool public c3RewardsEnabled = true;
uint256 public tokensForC1;
uint256 public tokensForC2;
uint256 public tokensForC3;
uint256 public tokensForC4;
uint256 public tokensForC5;
// treasury wallet, default to 0x3e822d55e79eA9F53C744BD9179d89dDec081556
address public c1Wallet;
// burning wallet, default to the staking rewards wallet, but when burning is enabled
// it will just burn them. The wallet still needs to be defined to function:
// 0x16cc620dBBACc751DAB85d7Fc1164C62858d9b9f
address public c2Wallet;
// rewards wallet, default to the rewards contract itself, not a wallet. But
// if rewards are disabled then they'll fall back to the staking rewards wallet:
// 0x16cc620dBBACc751DAB85d7Fc1164C62858d9b9f
address public c3Wallet;
// staking rewards wallet, default to 0x16cc620dBBACc751DAB85d7Fc1164C62858d9b9f
address public c4Wallet;
// operations wallet, default to 0xf05E5AeFeCd9c370fbfFff94c6c4614E6c165b78
address public c5Wallet;
uint256 public buyTotalFees = 1200; // 12% default
uint256 public buyC1Fee = 400; // 4% Treasury
uint256 public buyC2Fee = 0; // Nothing
uint256 public buyC3Fee = 300; // 3% Eth Rewards
uint256 public buyC4Fee = 300; // 3% Eth Staking Pool
uint256 public buyC5Fee = 200; // 2% Operations
uint256 public sellTotalFees = 1300; // 13% default
uint256 public sellC1Fee = 400; // 4% Treasury
uint256 public sellC2Fee = 100; // 1% Auto Burn
uint256 public sellC3Fee = 300; // 3% Eth Rewards
uint256 public sellC4Fee = 300; // 3% Eth Staking Pool
uint256 public sellC5Fee = 200; // 2% Operations
event LogErrorString(string message);
event SwapEnabled(bool enabled);
event TaxEnabled(bool enabled);
event TransferTaxEnabled(bool enabled);
event CompoundingEnabled(bool enabled);
event ChangeSwapTokensAtAmount(uint256 amount);
event LimitsReinstated();
event LimitsRemoved();
event C2BurningModified(bool enabled);
event C3RewardsModified(bool enabled);
event ChannelWalletsModified(address indexed newAddress, uint8 idx);
event BoughtEarly(address indexed sniper);
event ExcludeFromFees(address indexed account, bool isExcluded);
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event SetRewardTracker(address indexed newAddress);
event FeesUpdated();
event SendChannel1(uint256 amount);
event SendChannel2(uint256 amount);
event SendChannel3(uint256 amount);
event SendChannel4(uint256 amount);
event SendChannel5(uint256 amount);
event TokensBurned(uint256 amountBurned);
event NativeWithdrawn();
event FeesWithdrawn();
constructor()
ERC20("Aggregated Finance", "AGFI")
ERC20Permit("Aggregated Finance")
{
c1Wallet = address(0x3e822d55e79eA9F53C744BD9179d89dDec081556);
c2Wallet = address(0x16cc620dBBACc751DAB85d7Fc1164C62858d9b9f);
c3Wallet = address(0x16cc620dBBACc751DAB85d7Fc1164C62858d9b9f);
c4Wallet = address(0x16cc620dBBACc751DAB85d7Fc1164C62858d9b9f);
c5Wallet = address(0xf05E5AeFeCd9c370fbfFff94c6c4614E6c165b78);
rewardTracker = new RewardTracker(address(this), UNISWAPROUTER);
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(UNISWAPROUTER);
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = _uniswapV2Pair;
_setAutomatedMarketMakerPair(_uniswapV2Pair, true);
rewardTracker.excludeFromRewards(address(rewardTracker), true);
rewardTracker.excludeFromRewards(address(this), true);
rewardTracker.excludeFromRewards(owner(), true);
rewardTracker.excludeFromRewards(address(_uniswapV2Router), true);
rewardTracker.excludeFromRewards(address(0xdead), true); // we won't use the dead address as we can burn, but just in case someone burns their tokens
excludeFromFees(owner(), true);
excludeFromFees(address(rewardTracker), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
_mint(owner(), 1000000000000 * (1e9)); // 1,000,000,000,000 tokens with 9 decimal places
}
receive() external payable {}
function decimals() override public pure returns (uint8) {
return 9;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
function blacklistAccount(address account, bool isBlacklisted) public onlyOwner {
_blacklist[account] = isBlacklisted;
}
function setAutomatedMarketMakerPair(address pair, bool enabled) public onlyOwner {
require(pair != uniswapV2Pair, "AGFI: The pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, enabled);
}
function _setAutomatedMarketMakerPair(address pair, bool enabled) private {
automatedMarketMakerPairs[pair] = enabled;
emit SetAutomatedMarketMakerPair(pair, enabled);
}
function setRewardTracker(address payable newTracker) public onlyOwner {
require(newTracker != address(0), "AGFI: newTracker cannot be zero address");
rewardTracker = IRewardTracker(newTracker);
emit SetRewardTracker(newTracker);
}
function claim() public {
rewardTracker.processAccount(payable(_msgSender()));
}
function compound() public {
require(compoundingEnabled, "AGFI: compounding is not enabled");
isCompounding = true;
rewardTracker.compoundAccount(payable(_msgSender()));
isCompounding = false;
}
function withdrawableRewardOf(address account)
public
view
returns (uint256)
{
return rewardTracker.withdrawableRewardOf(account);
}
function withdrawnRewardOf(address account) public view returns (uint256) {
return rewardTracker.withdrawnRewardOf(account);
}
function accumulativeRewardOf(address account) public view returns (uint256) {
return rewardTracker.accumulativeRewardOf(account);
}
function getAccountInfo(address account)
public
view
returns (
address,
uint256,
uint256,
uint256,
uint256
)
{
return rewardTracker.getAccountInfo(account);
}
function enableTrading() external onlyOwner {
swapEnabled = true;
transferTaxEnabled = true;
launchedAt = block.number;
}
function getLastClaimTime(address account) public view returns (uint256) {
return rewardTracker.getLastClaimTime(account);
}
function setCompoundingEnabled(bool enabled) external onlyOwner {
compoundingEnabled = enabled;
emit CompoundingEnabled(enabled);
}
function setSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
emit SwapEnabled(enabled);
}
function setSwapChannels(bool c1, bool c2, bool c3, bool c4, bool c5) external onlyOwner {
swapC1Enabled = c1;
swapC2Enabled = c2;
swapC3Enabled = c3;
swapC4Enabled = c4;
swapC5Enabled = c5;
}
function setTransferTaxEnabled(bool enabled) external onlyOwner {
transferTaxEnabled = enabled;
emit TransferTaxEnabled(enabled);
}
function removeLimits() external onlyOwner {
limitsInEffect = false;
emit LimitsRemoved();
}
function reinstateLimits() external onlyOwner {
limitsInEffect = true;
emit LimitsReinstated();
}
function modifyC2Burning(bool enabled) external onlyOwner {
c2BurningEnabled = enabled;
emit C2BurningModified(enabled);
}
function modifyC3Rewards(bool enabled) external onlyOwner {
c3RewardsEnabled = enabled;
emit C3RewardsModified(enabled);
}
function modifyChannelWallet(address newAddress, uint8 idx) external onlyOwner {
require(newAddress != address(0), "AGFI: newAddress can not be zero address.");
if (idx == 1) {
c1Wallet = newAddress;
} else if (idx == 2) {
c2Wallet = newAddress;
} else if (idx == 3) {
c3Wallet = newAddress;
} else if (idx == 4) {
c4Wallet = newAddress;
} else if (idx == 5) {
c5Wallet = newAddress;
}
emit ChannelWalletsModified(newAddress, idx);
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool) {
transferDelayEnabled = false;
// not bothering with an event emission, as it's only called once
return true;
}
function updateBuyFees(
bool _enableC1,
uint256 _c1Fee,
bool _enableC2,
uint256 _c2Fee,
bool _enableC3,
uint256 _c3Fee,
bool _enableC4,
uint256 _c4Fee,
bool _enableC5,
uint256 _c5Fee
) external onlyOwner {
buyFeeC1Enabled = _enableC1;
buyC1Fee = _c1Fee;
buyFeeC2Enabled = _enableC2;
buyC2Fee = _c2Fee;
buyFeeC3Enabled = _enableC3;
buyC3Fee = _c3Fee;
buyFeeC4Enabled = _enableC4;
buyC4Fee = _c4Fee;
buyFeeC5Enabled = _enableC5;
buyC5Fee = _c5Fee;
buyTotalFees = _c1Fee + _c2Fee + _c3Fee + _c4Fee + _c5Fee;
require(buyTotalFees <= 3000, "AGFI: Must keep fees at 30% or less");
emit FeesUpdated();
}
function updateSellFees(
bool _enableC1,
uint256 _c1Fee,
bool _enableC2,
uint256 _c2Fee,
bool _enableC3,
uint256 _c3Fee,
bool _enableC4,
uint256 _c4Fee,
bool _enableC5,
uint256 _c5Fee
) external onlyOwner {
sellFeeC1Enabled = _enableC1;
sellC1Fee = _c1Fee;
sellFeeC2Enabled = _enableC2;
sellC2Fee = _c2Fee;
sellFeeC3Enabled = _enableC3;
sellC3Fee = _c3Fee;
sellFeeC4Enabled = _enableC4;
sellC4Fee = _c4Fee;
sellFeeC5Enabled = _enableC5;
sellC5Fee = _c5Fee;
sellTotalFees = _c1Fee + _c2Fee + _c3Fee + _c4Fee + _c5Fee;
require(sellTotalFees <= 3000, "AGFI: Must keep fees at 30% or less");
emit FeesUpdated();
}
function snapshot() public onlyOwner {
_snapshot();
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Snapshot) {
super._beforeTokenTransfer(from, to, amount);
}
function _afterTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Votes) {
super._afterTokenTransfer(from, to, amount);
}
function _mint(address to, uint256 amount) internal override(ERC20, ERC20Votes) {
super._mint(to, amount);
}
function _burn(address account, uint256 amount) internal override(ERC20, ERC20Votes) {
super._burn(account, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "_transfer: transfer from the zero address");
require(to != address(0), "_transfer: transfer to the zero address");
require(!_blacklist[from], "_transfer: Sender is blacklisted");
require(!_blacklist[to], "_transfer: Recipient is blacklisted");
if (amount == 0) {
_executeTransfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!swapEnabled) {
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "_transfer: Trading is not active.");
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
if (transferDelayEnabled){
if (to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
require(_holderLastTransferTimestamp[tx.origin] < block.number, "_transfer: Transfer Delay enabled. Only one purchase per block allowed.");
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
}
}
// anti bot logic
if (block.number <= (launchedAt + 3) &&
to != uniswapV2Pair &&
to != address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D)
) {
_blacklist[to] = true;
emit BoughtEarly(to);
}
if (
swapEnabled && // only executeSwap when enabled
!swapping && // and its not currently swapping (no reentry)
!automatedMarketMakerPairs[from] && // no swap on remove liquidity step 1 or DEX buy
from != address(uniswapV2Router) && // no swap on remove liquidity step 2
from != owner() && // and not the contract owner
to != owner()
) {
swapping = true;
_executeSwap();
lastSwapTime = block.timestamp;
swapping = false;
}
bool takeFee;
if (
from == address(uniswapV2Pair) ||
to == address(uniswapV2Pair) ||
automatedMarketMakerPairs[to] ||
automatedMarketMakerPairs[from] ||
transferTaxEnabled
) {
takeFee = true;
}
if (_isExcludedFromFees[from] || _isExcludedFromFees[to] || swapping || isCompounding || !transferTaxEnabled) {
takeFee = false;
}
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
uint256 fees;
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = (amount * sellTotalFees) / 10000;
if (sellFeeC1Enabled) {
tokensForC1 += fees * sellC1Fee / sellTotalFees;
}
if (sellFeeC2Enabled) {
tokensForC2 += fees * sellC2Fee / sellTotalFees;
}
if (sellFeeC3Enabled) {
tokensForC3 += fees * sellC3Fee / sellTotalFees;
}
if (sellFeeC4Enabled) {
tokensForC4 += fees * sellC4Fee / sellTotalFees;
}
if (sellFeeC5Enabled) {
tokensForC5 += fees * sellC5Fee / sellTotalFees;
}
// on buy
} else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = (amount * buyTotalFees) / 10000;
if (buyFeeC1Enabled) {
tokensForC1 += fees * buyC1Fee / buyTotalFees;
}
if (buyFeeC2Enabled) {
tokensForC2 += fees * buyC2Fee / buyTotalFees;
}
if (buyFeeC3Enabled) {
tokensForC3 += fees * buyC3Fee / buyTotalFees;
}
if (buyFeeC4Enabled) {
tokensForC4 += fees * buyC4Fee / buyTotalFees;
}
if (buyFeeC5Enabled) {
tokensForC5 += fees * buyC5Fee / buyTotalFees;
}
}
amount -= fees;
if (fees > 0){
_executeTransfer(from, address(this), fees);
}
}
_executeTransfer(from, to, amount);
rewardTracker.setBalance(payable(from), balanceOf(from));
rewardTracker.setBalance(payable(to), balanceOf(to));
}
function _executeSwap() private {
uint256 contractTokenBalance = balanceOf(address(this));
if (contractTokenBalance <= 0) { return; }
if (swapIndex == 0 && swapC1Enabled && tokensForC1 > 0) {
// channel 1 (treasury)
swapTokensForNative(tokensForC1);
(bool success, ) = payable(c1Wallet).call{value: address(this).balance}("");
if (success) {
emit SendChannel1(tokensForC1);
} else {
emit LogErrorString("Wallet failed to receive channel 1 tokens");
}
tokensForC1 = 0;
} else if (swapIndex == 1 && swapC2Enabled && tokensForC2 > 0) {
// channel 2 (burning)
if (c2BurningEnabled) {
_burn(address(this), tokensForC2);
emit TokensBurned(tokensForC2);
} else {
swapTokensForNative(tokensForC2);
(bool success, ) = payable(c2Wallet).call{value: address(this).balance}("");
if (success) {
emit SendChannel2(tokensForC2);
} else {
emit LogErrorString("Wallet failed to receive channel 1 tokens");
}
}
tokensForC2 = 0;
} else if (swapIndex == 2 && swapC3Enabled && tokensForC3 > 0) {
// channel 3 (rewards)
if (c3RewardsEnabled) {
swapTokensForNative(tokensForC3);
(bool success, ) = payable(rewardTracker).call{value: address(this).balance}("");
if (success) {
emit SendChannel3(tokensForC3);
} else {
emit LogErrorString("Wallet failed to receive channel 3 tokens");
}
} else {
_executeTransfer(address(this), c3Wallet, tokensForC3);
emit SendChannel3(tokensForC3);
}
tokensForC3 = 0;
} else if (swapIndex == 3 && swapC4Enabled && tokensForC4 > 0) {
// channel 4 (staking rewards)
_executeTransfer(address(this), c4Wallet, tokensForC4);
emit SendChannel4(tokensForC4);
tokensForC4 = 0;
} else if (swapIndex == 4 && swapC5Enabled && tokensForC5 > 0) {
// channel 5 (operations funds)
swapTokensForNative(tokensForC5);
(bool success, ) = payable(c5Wallet).call{value: address(this).balance}("");
if (success) {
emit SendChannel5(tokensForC5);
} else {
emit LogErrorString("Wallet failed to receive channel 5 tokens");
}
tokensForC5 = 0;
}
if (swapIndex == 4) {
swapIndex = 0; // reset back to the start
} else {
swapIndex++; // advance for the next swap call
}
}
// withdraw tokens
function withdrawCollectedFees() public onlyOwner {
_executeTransfer(address(this), msg.sender, balanceOf(address(this)));
tokensForC1 = 0;
tokensForC2 = 0;
tokensForC3 = 0;
tokensForC4 = 0;
tokensForC5 = 0;
emit FeesWithdrawn();
}
function _executeTransfer(address sender, address recipient, uint256 amount) private {
super._transfer(sender, recipient, amount);
}
// withdraw native
function withdrawCollectedNative() public onlyOwner {
(bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
if (success) {
emit NativeWithdrawn();
} else {
emit LogErrorString("Wallet failed to receive channel 5 tokens");
}
}
// swap the tokens back to ETH
function swapTokensForNative(uint256 tokens) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokens);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokens,
0, // accept any amount of native
path,
address(this),
block.timestamp
);
}
}Settings
{
"compilationTarget": {
"AggregatedFinance.sol": "AggregatedFinance"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}ABI
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