ERC-20
Overview
Max Total Supply
42,069,000,000 DGHOUR
Holders
103
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.29506051291035531 DGHOURValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
DegenHours
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT /* * ██████ ██████ ███████ ███████ ███ ██ ██ ██ ██████ ██ ██ ██████ ███████ * ██ ██ ██ ██ ██ ████ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ * ██ ██ █████ ██ ███ █████ ██ ██ ██ ███████ ██ ██ ██ ██ ██████ ███████ * ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ * ██████ ██████ ███████ ███████ ██ ████ ██ ██ ██████ ██████ ██ ██ ███████ * * Don't let your bags keep you up all night * **************************************** * Only tradable during 22:00-04:00 UTC * **************************************** * * Inspired by TradFiLines 0x4d04bBA7f5eA45ac59769a1095762467B1157CC4 * * Twitter - @DegenHoursCoin - don't expect anything, I have more important things to do * in my life than running a twitter account for some random magic internet money. * Website - I could make one, but it would be ugly af and wtf am I going to put on there? * Telegram - No thank you very f'ing much. */ pragma solidity ^0.8.0; import "solady/src/tokens/ERC20.sol"; error OutOfDegenHours(); contract DegenHours is ERC20 { uint256 constant TOTAL_SUPPLY = 42069000000 ether; constructor() { _mint(msg.sender, TOTAL_SUPPLY); } function name() public pure override returns (string memory) { return "Degen Hours"; } function symbol() public pure override returns (string memory) { return "DGHOUR"; } function isWithinDegenHours() public view returns(bool) { uint256 hour = (block.timestamp % (24 * 60 * 60)) / (60 * 60); return (hour > 21 || hour < 4); } function _beforeTokenTransfer(address from, address to, uint256 amount) internal view override { if (!isWithinDegenHours()) revert OutOfDegenHours(); } } // milady
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @notice Simple ERC20 + EIP-2612 implementation. /// @author Solady (https://github.com/vectorized/solady/blob/main/src/tokens/ERC20.sol) /// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol) /// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol) abstract contract ERC20 { /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* CUSTOM ERRORS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The total supply has overflowed. error TotalSupplyOverflow(); /// @dev The allowance has overflowed. error AllowanceOverflow(); /// @dev The allowance has underflowed. error AllowanceUnderflow(); /// @dev Insufficient balance. error InsufficientBalance(); /// @dev Insufficient allowance. error InsufficientAllowance(); /// @dev The permit is invalid. error InvalidPermit(); /// @dev The permit has expired. error PermitExpired(); /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* EVENTS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Emitted when `amount` tokens is transferred from `from` to `to`. event Transfer(address indexed from, address indexed to, uint256 amount); /// @dev Emitted when `amount` tokens is approved by `owner` to be used by `spender`. event Approval(address indexed owner, address indexed spender, uint256 amount); /// @dev `keccak256(bytes("Transfer(address,address,uint256)"))`. uint256 private constant _TRANSFER_EVENT_SIGNATURE = 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef; /// @dev `keccak256(bytes("Approval(address,address,uint256)"))`. uint256 private constant _APPROVAL_EVENT_SIGNATURE = 0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925; /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* STORAGE */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev The storage slot for the total supply. uint256 private constant _TOTAL_SUPPLY_SLOT = 0x05345cdf77eb68f44c; /// @dev The balance slot of `owner` is given by: /// ``` /// mstore(0x0c, _BALANCE_SLOT_SEED) /// mstore(0x00, owner) /// let balanceSlot := keccak256(0x0c, 0x20) /// ``` uint256 private constant _BALANCE_SLOT_SEED = 0x87a211a2; /// @dev The allowance slot of (`owner`, `spender`) is given by: /// ``` /// mstore(0x20, spender) /// mstore(0x0c, _ALLOWANCE_SLOT_SEED) /// mstore(0x00, owner) /// let allowanceSlot := keccak256(0x0c, 0x34) /// ``` uint256 private constant _ALLOWANCE_SLOT_SEED = 0x7f5e9f20; /// @dev The nonce slot of `owner` is given by: /// ``` /// mstore(0x0c, _NONCES_SLOT_SEED) /// mstore(0x00, owner) /// let nonceSlot := keccak256(0x0c, 0x20) /// ``` uint256 private constant _NONCES_SLOT_SEED = 0x38377508; /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* ERC20 METADATA */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the name of the token. function name() public view virtual returns (string memory); /// @dev Returns the symbol of the token. function symbol() public view virtual returns (string memory); /// @dev Returns the decimals places of the token. function decimals() public view virtual returns (uint8) { return 18; } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* ERC20 */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the amount of tokens in existence. function totalSupply() public view virtual returns (uint256 result) { /// @solidity memory-safe-assembly assembly { result := sload(_TOTAL_SUPPLY_SLOT) } } /// @dev Returns the amount of tokens owned by `owner`. function balanceOf(address owner) public view virtual returns (uint256 result) { /// @solidity memory-safe-assembly assembly { mstore(0x0c, _BALANCE_SLOT_SEED) mstore(0x00, owner) result := sload(keccak256(0x0c, 0x20)) } } /// @dev Returns the amount of tokens that `spender` can spend on behalf of `owner`. function allowance(address owner, address spender) public view virtual returns (uint256 result) { /// @solidity memory-safe-assembly assembly { mstore(0x20, spender) mstore(0x0c, _ALLOWANCE_SLOT_SEED) mstore(0x00, owner) result := sload(keccak256(0x0c, 0x34)) } } /// @dev Sets `amount` as the allowance of `spender` over the caller's tokens. /// /// Emits a {Approval} event. function approve(address spender, uint256 amount) public virtual returns (bool) { /// @solidity memory-safe-assembly assembly { // Compute the allowance slot and store the amount. mstore(0x20, spender) mstore(0x0c, _ALLOWANCE_SLOT_SEED) mstore(0x00, caller()) sstore(keccak256(0x0c, 0x34), amount) // Emit the {Approval} event. mstore(0x00, amount) log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, caller(), shr(96, mload(0x2c))) } return true; } /// @dev Atomically increases the allowance granted to `spender` by the caller. /// /// Emits a {Approval} event. function increaseAllowance(address spender, uint256 difference) public virtual returns (bool) { /// @solidity memory-safe-assembly assembly { // Compute the allowance slot and load its value. mstore(0x20, spender) mstore(0x0c, _ALLOWANCE_SLOT_SEED) mstore(0x00, caller()) let allowanceSlot := keccak256(0x0c, 0x34) let allowanceBefore := sload(allowanceSlot) // Add to the allowance. let allowanceAfter := add(allowanceBefore, difference) // Revert upon overflow. if lt(allowanceAfter, allowanceBefore) { mstore(0x00, 0xf9067066) // `AllowanceOverflow()`. revert(0x1c, 0x04) } // Store the updated allowance. sstore(allowanceSlot, allowanceAfter) // Emit the {Approval} event. mstore(0x00, allowanceAfter) log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, caller(), shr(96, mload(0x2c))) } return true; } /// @dev Atomically decreases the allowance granted to `spender` by the caller. /// /// Emits a {Approval} event. function decreaseAllowance(address spender, uint256 difference) public virtual returns (bool) { /// @solidity memory-safe-assembly assembly { // Compute the allowance slot and load its value. mstore(0x20, spender) mstore(0x0c, _ALLOWANCE_SLOT_SEED) mstore(0x00, caller()) let allowanceSlot := keccak256(0x0c, 0x34) let allowanceBefore := sload(allowanceSlot) // Revert if will underflow. if lt(allowanceBefore, difference) { mstore(0x00, 0x8301ab38) // `AllowanceUnderflow()`. revert(0x1c, 0x04) } // Subtract and store the updated allowance. let allowanceAfter := sub(allowanceBefore, difference) sstore(allowanceSlot, allowanceAfter) // Emit the {Approval} event. mstore(0x00, allowanceAfter) log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, caller(), shr(96, mload(0x2c))) } return true; } /// @dev Transfer `amount` tokens from the caller to `to`. /// /// Requirements: /// - `from` must at least have `amount`. /// /// Emits a {Transfer} event. function transfer(address to, uint256 amount) public virtual returns (bool) { _beforeTokenTransfer(msg.sender, to, amount); /// @solidity memory-safe-assembly assembly { // Compute the balance slot and load its value. mstore(0x0c, _BALANCE_SLOT_SEED) mstore(0x00, caller()) let fromBalanceSlot := keccak256(0x0c, 0x20) let fromBalance := sload(fromBalanceSlot) // Revert if insufficient balance. if gt(amount, fromBalance) { mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`. revert(0x1c, 0x04) } // Subtract and store the updated balance. sstore(fromBalanceSlot, sub(fromBalance, amount)) // Compute the balance slot of `to`. mstore(0x00, to) let toBalanceSlot := keccak256(0x0c, 0x20) // Add and store the updated balance of `to`. // Will not overflow because the sum of all user balances // cannot exceed the maximum uint256 value. sstore(toBalanceSlot, add(sload(toBalanceSlot), amount)) // Emit the {Transfer} event. mstore(0x20, amount) log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, caller(), shr(96, mload(0x0c))) } _afterTokenTransfer(msg.sender, to, amount); return true; } /// @dev Transfers `amount` tokens from `from` to `to`. /// /// Note: does not update the allowance if it is the maximum uint256 value. /// /// Requirements: /// - `from` must at least have `amount`. /// - The caller must have at least `amount` of allowance to transfer the tokens of `from`. /// /// Emits a {Transfer} event. function transferFrom(address from, address to, uint256 amount) public virtual returns (bool) { _beforeTokenTransfer(from, to, amount); /// @solidity memory-safe-assembly assembly { let from_ := shl(96, from) // Compute the allowance slot and load its value. mstore(0x20, caller()) mstore(0x0c, or(from_, _ALLOWANCE_SLOT_SEED)) let allowanceSlot := keccak256(0x0c, 0x34) let allowance_ := sload(allowanceSlot) // If the allowance is not the maximum uint256 value. if iszero(eq(allowance_, not(0))) { // Revert if the amount to be transferred exceeds the allowance. if gt(amount, allowance_) { mstore(0x00, 0x13be252b) // `InsufficientAllowance()`. revert(0x1c, 0x04) } // Subtract and store the updated allowance. sstore(allowanceSlot, sub(allowance_, amount)) } // Compute the balance slot and load its value. mstore(0x0c, or(from_, _BALANCE_SLOT_SEED)) let fromBalanceSlot := keccak256(0x0c, 0x20) let fromBalance := sload(fromBalanceSlot) // Revert if insufficient balance. if gt(amount, fromBalance) { mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`. revert(0x1c, 0x04) } // Subtract and store the updated balance. sstore(fromBalanceSlot, sub(fromBalance, amount)) // Compute the balance slot of `to`. mstore(0x00, to) let toBalanceSlot := keccak256(0x0c, 0x20) // Add and store the updated balance of `to`. // Will not overflow because the sum of all user balances // cannot exceed the maximum uint256 value. sstore(toBalanceSlot, add(sload(toBalanceSlot), amount)) // Emit the {Transfer} event. mstore(0x20, amount) log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, from_), shr(96, mload(0x0c))) } _afterTokenTransfer(from, to, amount); return true; } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* EIP-2612 */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Returns the current nonce for `owner`. /// This value is used to compute the signature for EIP-2612 permit. function nonces(address owner) public view virtual returns (uint256 result) { /// @solidity memory-safe-assembly assembly { // Compute the nonce slot and load its value. mstore(0x0c, _NONCES_SLOT_SEED) mstore(0x00, owner) result := sload(keccak256(0x0c, 0x20)) } } /// @dev Sets `value` as the allowance of `spender` over the tokens of `owner`, /// authorized by a signed approval by `owner`. /// /// Emits a {Approval} event. function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual { bytes32 domainSeparator = DOMAIN_SEPARATOR(); /// @solidity memory-safe-assembly assembly { // Grab the free memory pointer. let m := mload(0x40) // Revert if the block timestamp greater than `deadline`. if gt(timestamp(), deadline) { mstore(0x00, 0x1a15a3cc) // `PermitExpired()`. revert(0x1c, 0x04) } // Clean the upper 96 bits. owner := shr(96, shl(96, owner)) spender := shr(96, shl(96, spender)) // Compute the nonce slot and load its value. mstore(0x0c, _NONCES_SLOT_SEED) mstore(0x00, owner) let nonceSlot := keccak256(0x0c, 0x20) let nonceValue := sload(nonceSlot) // Increment and store the updated nonce. sstore(nonceSlot, add(nonceValue, 1)) // Prepare the inner hash. // `keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")`. // forgefmt: disable-next-item mstore(m, 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9) mstore(add(m, 0x20), owner) mstore(add(m, 0x40), spender) mstore(add(m, 0x60), value) mstore(add(m, 0x80), nonceValue) mstore(add(m, 0xa0), deadline) // Prepare the outer hash. mstore(0, 0x1901) mstore(0x20, domainSeparator) mstore(0x40, keccak256(m, 0xc0)) // Prepare the ecrecover calldata. mstore(0, keccak256(0x1e, 0x42)) mstore(0x20, and(0xff, v)) mstore(0x40, r) mstore(0x60, s) pop(staticcall(gas(), 1, 0, 0x80, 0x20, 0x20)) // If the ecrecover fails, the returndatasize will be 0x00, // `owner` will be be checked if it equals the hash at 0x00, // which evaluates to false (i.e. 0), and we will revert. // If the ecrecover succeeds, the returndatasize will be 0x20, // `owner` will be compared against the returned address at 0x20. if iszero(eq(mload(returndatasize()), owner)) { mstore(0x00, 0xddafbaef) // `InvalidPermit()`. revert(0x1c, 0x04) } // Compute the allowance slot and store the value. // The `owner` is already at slot 0x20. mstore(0x40, or(shl(160, _ALLOWANCE_SLOT_SEED), spender)) sstore(keccak256(0x2c, 0x34), value) // Emit the {Approval} event. log3(add(m, 0x60), 0x20, _APPROVAL_EVENT_SIGNATURE, owner, spender) mstore(0x40, m) // Restore the free memory pointer. mstore(0x60, 0) // Restore the zero pointer. } } /// @dev Returns the EIP-2612 domains separator. function DOMAIN_SEPARATOR() public view virtual returns (bytes32 result) { /// @solidity memory-safe-assembly assembly { result := mload(0x40) // Grab the free memory pointer. } // We simply calculate it on-the-fly to allow for cases where the `name` may change. bytes32 nameHash = keccak256(bytes(name())); /// @solidity memory-safe-assembly assembly { let m := result // `keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")`. // forgefmt: disable-next-item mstore(m, 0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f) mstore(add(m, 0x20), nameHash) // `keccak256("1")`. // forgefmt: disable-next-item mstore(add(m, 0x40), 0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6) mstore(add(m, 0x60), chainid()) mstore(add(m, 0x80), address()) result := keccak256(m, 0xa0) } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* INTERNAL MINT FUNCTIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Mints `amount` tokens to `to`, increasing the total supply. /// /// Emits a {Transfer} event. function _mint(address to, uint256 amount) internal virtual { _beforeTokenTransfer(address(0), to, amount); /// @solidity memory-safe-assembly assembly { let totalSupplyBefore := sload(_TOTAL_SUPPLY_SLOT) let totalSupplyAfter := add(totalSupplyBefore, amount) // Revert if the total supply overflows. if lt(totalSupplyAfter, totalSupplyBefore) { mstore(0x00, 0xe5cfe957) // `TotalSupplyOverflow()`. revert(0x1c, 0x04) } // Store the updated total supply. sstore(_TOTAL_SUPPLY_SLOT, totalSupplyAfter) // Compute the balance slot and load its value. mstore(0x0c, _BALANCE_SLOT_SEED) mstore(0x00, to) let toBalanceSlot := keccak256(0x0c, 0x20) // Add and store the updated balance. sstore(toBalanceSlot, add(sload(toBalanceSlot), amount)) // Emit the {Transfer} event. mstore(0x20, amount) log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, 0, shr(96, mload(0x0c))) } _afterTokenTransfer(address(0), to, amount); } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* INTERNAL BURN FUNCTIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Burns `amount` tokens from `from`, reducing the total supply. /// /// Emits a {Transfer} event. function _burn(address from, uint256 amount) internal virtual { _beforeTokenTransfer(from, address(0), amount); /// @solidity memory-safe-assembly assembly { // Compute the balance slot and load its value. mstore(0x0c, _BALANCE_SLOT_SEED) mstore(0x00, from) let fromBalanceSlot := keccak256(0x0c, 0x20) let fromBalance := sload(fromBalanceSlot) // Revert if insufficient balance. if gt(amount, fromBalance) { mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`. revert(0x1c, 0x04) } // Subtract and store the updated balance. sstore(fromBalanceSlot, sub(fromBalance, amount)) // Subtract and store the updated total supply. sstore(_TOTAL_SUPPLY_SLOT, sub(sload(_TOTAL_SUPPLY_SLOT), amount)) // Emit the {Transfer} event. mstore(0x00, amount) log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), 0) } _afterTokenTransfer(from, address(0), amount); } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* INTERNAL TRANSFER FUNCTIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Moves `amount` of tokens from `from` to `to`. function _transfer(address from, address to, uint256 amount) internal virtual { _beforeTokenTransfer(from, to, amount); /// @solidity memory-safe-assembly assembly { let from_ := shl(96, from) // Compute the balance slot and load its value. mstore(0x0c, or(from_, _BALANCE_SLOT_SEED)) let fromBalanceSlot := keccak256(0x0c, 0x20) let fromBalance := sload(fromBalanceSlot) // Revert if insufficient balance. if gt(amount, fromBalance) { mstore(0x00, 0xf4d678b8) // `InsufficientBalance()`. revert(0x1c, 0x04) } // Subtract and store the updated balance. sstore(fromBalanceSlot, sub(fromBalance, amount)) // Compute the balance slot of `to`. mstore(0x00, to) let toBalanceSlot := keccak256(0x0c, 0x20) // Add and store the updated balance of `to`. // Will not overflow because the sum of all user balances // cannot exceed the maximum uint256 value. sstore(toBalanceSlot, add(sload(toBalanceSlot), amount)) // Emit the {Transfer} event. mstore(0x20, amount) log3(0x20, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, from_), shr(96, mload(0x0c))) } _afterTokenTransfer(from, to, amount); } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* INTERNAL ALLOWANCE FUNCTIONS */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Updates the allowance of `owner` for `spender` based on spent `amount`. function _spendAllowance(address owner, address spender, uint256 amount) internal virtual { /// @solidity memory-safe-assembly assembly { // Compute the allowance slot and load its value. mstore(0x20, spender) mstore(0x0c, _ALLOWANCE_SLOT_SEED) mstore(0x00, owner) let allowanceSlot := keccak256(0x0c, 0x34) let allowance_ := sload(allowanceSlot) // If the allowance is not the maximum uint256 value. if iszero(eq(allowance_, not(0))) { // Revert if the amount to be transferred exceeds the allowance. if gt(amount, allowance_) { mstore(0x00, 0x13be252b) // `InsufficientAllowance()`. revert(0x1c, 0x04) } // Subtract and store the updated allowance. sstore(allowanceSlot, sub(allowance_, amount)) } } } /// @dev Sets `amount` as the allowance of `spender` over the tokens of `owner`. /// /// Emits a {Approval} event. function _approve(address owner, address spender, uint256 amount) internal virtual { /// @solidity memory-safe-assembly assembly { let owner_ := shl(96, owner) // Compute the allowance slot and store the amount. mstore(0x20, spender) mstore(0x0c, or(owner_, _ALLOWANCE_SLOT_SEED)) sstore(keccak256(0x0c, 0x34), amount) // Emit the {Approval} event. mstore(0x00, amount) log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, shr(96, owner_), shr(96, mload(0x2c))) } } /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/ /* HOOKS TO OVERRIDE */ /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/ /// @dev Hook that is called before any transfer of tokens. /// This includes minting and burning. 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. function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {} }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AllowanceOverflow","type":"error"},{"inputs":[],"name":"AllowanceUnderflow","type":"error"},{"inputs":[],"name":"InsufficientAllowance","type":"error"},{"inputs":[],"name":"InsufficientBalance","type":"error"},{"inputs":[],"name":"InvalidPermit","type":"error"},{"inputs":[],"name":"OutOfDegenHours","type":"error"},{"inputs":[],"name":"PermitExpired","type":"error"},{"inputs":[],"name":"TotalSupplyOverflow","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"result","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"result","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"result","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"difference","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"difference","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isWithinDegenHours","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"result","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"result","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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