Token

ERC-20: 404DOG (404DOG)

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ERC-20

Overview

Max Total Supply

1,000 404DOG

Holders

Market

Onchain Market Cap

$0.00

Circulating Supply Market Cap

Other Info

Token Contract (WITH 18 Decimals)

0x291f66194a922cab40ca8e9b7705abd9c3549e23

Filtered by Token Holder

0x6350F67cD662316dE8Aaa764f9523Bf242766022

yeehan.eth

Balance

0.858863720536954214 404DOG

Value

$0.00

0x6350f67cd662316de8aaa764f9523bf242766022

Click here to update the token information / general information

#	Exchange	Pair	Price	24H Volume	% Volume

Contract Source Code Verified (Exact Match)

Contract Name:

DOG404

Compiler Version

v0.8.20+commit.a1b79de6

Optimization Enabled:

Yes with 200 runs

Other Settings:

default evmVersion, MIT license

Contract Source Code (Solidity)

IDE

/**
 *Submitted for verification at Etherscan.io on 2024-02-13
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

// File: https://github.com/Vectorized/solady/blob/main/src/utils/SafeTransferLib.sol


/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/SafeTransferLib.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
///
/// @dev Note:
/// - For ETH transfers, please use `forceSafeTransferETH` for DoS protection.
/// - For ERC20s, this implementation won't check that a token has code,
///   responsibility is delegated to the caller.
library SafeTransferLib {
	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                       CUSTOM ERRORS                        */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev The ETH transfer has failed.
	error ETHTransferFailed();

	/// @dev The ERC20 `transferFrom` has failed.
	error TransferFromFailed();

	/// @dev The ERC20 `transfer` has failed.
	error TransferFailed();

	/// @dev The ERC20 `approve` has failed.
	error ApproveFailed();

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                         CONSTANTS                          */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Suggested gas stipend for contract receiving ETH that disallows any storage writes.
	uint256 internal constant GAS_STIPEND_NO_STORAGE_WRITES = 2300;

	/// @dev Suggested gas stipend for contract receiving ETH to perform a few
	/// storage reads and writes, but low enough to prevent griefing.
	uint256 internal constant GAS_STIPEND_NO_GRIEF = 100000;

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                       ETH OPERATIONS                       */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	// If the ETH transfer MUST succeed with a reasonable gas budget, use the force variants.
	//
	// The regular variants:
	// - Forwards all remaining gas to the target.
	// - Reverts if the target reverts.
	// - Reverts if the current contract has insufficient balance.
	//
	// The force variants:
	// - Forwards with an optional gas stipend
	//   (defaults to `GAS_STIPEND_NO_GRIEF`, which is sufficient for most cases).
	// - If the target reverts, or if the gas stipend is exhausted,
	//   creates a temporary contract to force send the ETH via `SELFDESTRUCT`.
	//   Future compatible with `SENDALL`: https://eips.ethereum.org/EIPS/eip-4758.
	// - Reverts if the current contract has insufficient balance.
	//
	// The try variants:
	// - Forwards with a mandatory gas stipend.
	// - Instead of reverting, returns whether the transfer succeeded.

	/// @dev Sends `amount` (in wei) ETH to `to`.
	function safeTransferETH(address to, uint256 amount) internal {
		/// @solidity memory-safe-assembly
		assembly {
			if iszero(call(gas(), to, amount, codesize(), 0x00, codesize(), 0x00)) {
				mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
				revert(0x1c, 0x04)
			}
		}
	}

	/// @dev Sends all the ETH in the current contract to `to`.
	function safeTransferAllETH(address to) internal {
		/// @solidity memory-safe-assembly
		assembly {
			// Transfer all the ETH and check if it succeeded or not.
			if iszero(call(gas(), to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
				mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
				revert(0x1c, 0x04)
			}
		}
	}

	/// @dev Force sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
	function forceSafeTransferETH(address to, uint256 amount, uint256 gasStipend) internal {
		/// @solidity memory-safe-assembly
		assembly {
			if lt(selfbalance(), amount) {
				mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
				revert(0x1c, 0x04)
			}
			if iszero(call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)) {
				mstore(0x00, to) // Store the address in scratch space.
				mstore8(0x0b, 0x73) // Opcode `PUSH20`.
				mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
				if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
			}
		}
	}

	/// @dev Force sends all the ETH in the current contract to `to`, with a `gasStipend`.
	function forceSafeTransferAllETH(address to, uint256 gasStipend) internal {
		/// @solidity memory-safe-assembly
		assembly {
			if iszero(call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
				mstore(0x00, to) // Store the address in scratch space.
				mstore8(0x0b, 0x73) // Opcode `PUSH20`.
				mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
				if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
			}
		}
	}

	/// @dev Force sends `amount` (in wei) ETH to `to`, with `GAS_STIPEND_NO_GRIEF`.
	function forceSafeTransferETH(address to, uint256 amount) internal {
		/// @solidity memory-safe-assembly
		assembly {
			if lt(selfbalance(), amount) {
				mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
				revert(0x1c, 0x04)
			}
			if iszero(call(GAS_STIPEND_NO_GRIEF, to, amount, codesize(), 0x00, codesize(), 0x00)) {
				mstore(0x00, to) // Store the address in scratch space.
				mstore8(0x0b, 0x73) // Opcode `PUSH20`.
				mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
				if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
			}
		}
	}

	/// @dev Force sends all the ETH in the current contract to `to`, with `GAS_STIPEND_NO_GRIEF`.
	function forceSafeTransferAllETH(address to) internal {
		/// @solidity memory-safe-assembly
		assembly {
			// forgefmt: disable-next-item
			if iszero(call(GAS_STIPEND_NO_GRIEF, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
				mstore(0x00, to) // Store the address in scratch space.
				mstore8(0x0b, 0x73) // Opcode `PUSH20`.
				mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
				if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
			}
		}
	}

	/// @dev Sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
	function trySafeTransferETH(address to, uint256 amount, uint256 gasStipend)
		internal
		returns (bool success)
	{
		/// @solidity memory-safe-assembly
		assembly {
			success := call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)
		}
	}

	/// @dev Sends all the ETH in the current contract to `to`, with a `gasStipend`.
	function trySafeTransferAllETH(address to, uint256 gasStipend)
		internal
		returns (bool success)
	{
		/// @solidity memory-safe-assembly
		assembly {
			success := call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)
		}
	}

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                      ERC20 OPERATIONS                      */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Sends `amount` of ERC20 `token` from `from` to `to`.
	/// Reverts upon failure.
	///
	/// The `from` account must have at least `amount` approved for
	/// the current contract to manage.
	function safeTransferFrom(address token, address from, address to, uint256 amount) internal {
		/// @solidity memory-safe-assembly
		assembly {
			let m := mload(0x40) // Cache the free memory pointer.
			mstore(0x60, amount) // Store the `amount` argument.
			mstore(0x40, to) // Store the `to` argument.
			mstore(0x2c, shl(96, from)) // Store the `from` argument.
			mstore(0x0c, 0x23b872dd000000000000000000000000) // `transferFrom(address,address,uint256)`.
			// Perform the transfer, reverting upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
					call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
				)
			) {
				mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
				revert(0x1c, 0x04)
			}
			mstore(0x60, 0) // Restore the zero slot to zero.
			mstore(0x40, m) // Restore the free memory pointer.
		}
	}

	/// @dev Sends all of ERC20 `token` from `from` to `to`.
	/// Reverts upon failure.
	///
	/// The `from` account must have their entire balance approved for
	/// the current contract to manage.
	function safeTransferAllFrom(address token, address from, address to)
		internal
		returns (uint256 amount)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let m := mload(0x40) // Cache the free memory pointer.
			mstore(0x40, to) // Store the `to` argument.
			mstore(0x2c, shl(96, from)) // Store the `from` argument.
			mstore(0x0c, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
			// Read the balance, reverting upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					gt(returndatasize(), 0x1f), // At least 32 bytes returned.
					staticcall(gas(), token, 0x1c, 0x24, 0x60, 0x20)
				)
			) {
				mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
				revert(0x1c, 0x04)
			}
			mstore(0x00, 0x23b872dd) // `transferFrom(address,address,uint256)`.
			amount := mload(0x60) // The `amount` is already at 0x60. We'll need to return it.
			// Perform the transfer, reverting upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
					call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
				)
			) {
				mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
				revert(0x1c, 0x04)
			}
			mstore(0x60, 0) // Restore the zero slot to zero.
			mstore(0x40, m) // Restore the free memory pointer.
		}
	}

	/// @dev Sends `amount` of ERC20 `token` from the current contract to `to`.
	/// Reverts upon failure.
	function safeTransfer(address token, address to, uint256 amount) internal {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x14, to) // Store the `to` argument.
			mstore(0x34, amount) // Store the `amount` argument.
			mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
			// Perform the transfer, reverting upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
					call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
				)
			) {
				mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
				revert(0x1c, 0x04)
			}
			mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
		}
	}

	/// @dev Sends all of ERC20 `token` from the current contract to `to`.
	/// Reverts upon failure.
	function safeTransferAll(address token, address to) internal returns (uint256 amount) {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x00, 0x70a08231) // Store the function selector of `balanceOf(address)`.
			mstore(0x20, address()) // Store the address of the current contract.
			// Read the balance, reverting upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					gt(returndatasize(), 0x1f), // At least 32 bytes returned.
					staticcall(gas(), token, 0x1c, 0x24, 0x34, 0x20)
				)
			) {
				mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
				revert(0x1c, 0x04)
			}
			mstore(0x14, to) // Store the `to` argument.
			amount := mload(0x34) // The `amount` is already at 0x34. We'll need to return it.
			mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
			// Perform the transfer, reverting upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
					call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
				)
			) {
				mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
				revert(0x1c, 0x04)
			}
			mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
		}
	}

	/// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
	/// Reverts upon failure.
	function safeApprove(address token, address to, uint256 amount) internal {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x14, to) // Store the `to` argument.
			mstore(0x34, amount) // Store the `amount` argument.
			mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
			// Perform the approval, reverting upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
					call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
				)
			) {
				mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
				revert(0x1c, 0x04)
			}
			mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
		}
	}

	/// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
	/// If the initial attempt to approve fails, attempts to reset the approved amount to zero,
	/// then retries the approval again (some tokens, e.g. USDT, requires this).
	/// Reverts upon failure.
	function safeApproveWithRetry(address token, address to, uint256 amount) internal {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x14, to) // Store the `to` argument.
			mstore(0x34, amount) // Store the `amount` argument.
			mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
			// Perform the approval, retrying upon failure.
			if iszero(
				and( // The arguments of `and` are evaluated from right to left.
					or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
					call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
				)
			) {
				mstore(0x34, 0) // Store 0 for the `amount`.
				mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
				pop(call(gas(), token, 0, 0x10, 0x44, codesize(), 0x00)) // Reset the approval.
				mstore(0x34, amount) // Store back the original `amount`.
				// Retry the approval, reverting upon failure.
				if iszero(
					and(
						or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
						call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
					)
				) {
					mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
					revert(0x1c, 0x04)
				}
			}
			mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
		}
	}

	/// @dev Returns the amount of ERC20 `token` owned by `account`.
	/// Returns zero if the `token` does not exist.
	function balanceOf(address token, address account) internal view returns (uint256 amount) {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x14, account) // Store the `account` argument.
			mstore(0x00, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
			amount :=
				mul(
					mload(0x20),
					and( // The arguments of `and` are evaluated from right to left.
						gt(returndatasize(), 0x1f), // At least 32 bytes returned.
						staticcall(gas(), token, 0x10, 0x24, 0x20, 0x20)
					)
				)
		}
	}
}

// File: https://github.com/Vectorized/solady/blob/main/src/utils/LibString.sol


pragma solidity ^0.8.4;

/// @notice Library for converting numbers into strings and other string operations.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibString.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibString.sol)
///
/// @dev Note:
/// For performance and bytecode compactness, most of the string operations are restricted to
/// byte strings (7-bit ASCII), except where otherwise specified.
/// Usage of byte string operations on charsets with runes spanning two or more bytes
/// can lead to undefined behavior.
library LibString {
	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                        CUSTOM ERRORS                       */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev The length of the output is too small to contain all the hex digits.
	error HexLengthInsufficient();

	/// @dev The length of the string is more than 32 bytes.
	error TooBigForSmallString();

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                         CONSTANTS                          */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev The constant returned when the `search` is not found in the string.
	uint256 internal constant NOT_FOUND = type(uint256).max;

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                     DECIMAL OPERATIONS                     */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Returns the base 10 decimal representation of `value`.
	function toString(uint256 value) internal pure returns (string memory str) {
		/// @solidity memory-safe-assembly
		assembly {
			// The maximum value of a uint256 contains 78 digits (1 byte per digit), but
			// we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.
			// We will need 1 word for the trailing zeros padding, 1 word for the length,
			// and 3 words for a maximum of 78 digits.
			str := add(mload(0x40), 0x80)
			// Update the free memory pointer to allocate.
			mstore(0x40, add(str, 0x20))
			// Zeroize the slot after the string.
			mstore(str, 0)

			// Cache the end of the memory to calculate the length later.
			let end := str

			let w := not(0) // Tsk.
			// We write the string from rightmost digit to leftmost digit.
			// The following is essentially a do-while loop that also handles the zero case.
			for { let temp := value } 1 {} {
				str := add(str, w) // `sub(str, 1)`.
				// Write the character to the pointer.
				// The ASCII index of the '0' character is 48.
				mstore8(str, add(48, mod(temp, 10)))
				// Keep dividing `temp` until zero.
				temp := div(temp, 10)
				if iszero(temp) { break }
			}

			let length := sub(end, str)
			// Move the pointer 32 bytes leftwards to make room for the length.
			str := sub(str, 0x20)
			// Store the length.
			mstore(str, length)
		}
	}

	/// @dev Returns the base 10 decimal representation of `value`.
	function toString(int256 value) internal pure returns (string memory str) {
		if (value >= 0) {
			return toString(uint256(value));
		}
		unchecked {
			str = toString(~uint256(value) + 1);
		}
		/// @solidity memory-safe-assembly
		assembly {
			// We still have some spare memory space on the left,
			// as we have allocated 3 words (96 bytes) for up to 78 digits.
			let length := mload(str) // Load the string length.
			mstore(str, 0x2d) // Store the '-' character.
			str := sub(str, 1) // Move back the string pointer by a byte.
			mstore(str, add(length, 1)) // Update the string length.
		}
	}

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                   HEXADECIMAL OPERATIONS                   */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Returns the hexadecimal representation of `value`,
	/// left-padded to an input length of `length` bytes.
	/// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte,
	/// giving a total length of `length * 2 + 2` bytes.
	/// Reverts if `length` is too small for the output to contain all the digits.
	function toHexString(uint256 value, uint256 length) internal pure returns (string memory str) {
		str = toHexStringNoPrefix(value, length);
		/// @solidity memory-safe-assembly
		assembly {
			let strLength := add(mload(str), 2) // Compute the length.
			mstore(str, 0x3078) // Write the "0x" prefix.
			str := sub(str, 2) // Move the pointer.
			mstore(str, strLength) // Write the length.
		}
	}

	/// @dev Returns the hexadecimal representation of `value`,
	/// left-padded to an input length of `length` bytes.
	/// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte,
	/// giving a total length of `length * 2` bytes.
	/// Reverts if `length` is too small for the output to contain all the digits.
	function toHexStringNoPrefix(uint256 value, uint256 length)
		internal
		pure
		returns (string memory str)
	{
		/// @solidity memory-safe-assembly
		assembly {
			// We need 0x20 bytes for the trailing zeros padding, `length * 2` bytes
			// for the digits, 0x02 bytes for the prefix, and 0x20 bytes for the length.
			// We add 0x20 to the total and round down to a multiple of 0x20.
			// (0x20 + 0x20 + 0x02 + 0x20) = 0x62.
			str := add(mload(0x40), and(add(shl(1, length), 0x42), not(0x1f)))
			// Allocate the memory.
			mstore(0x40, add(str, 0x20))
			// Zeroize the slot after the string.
			mstore(str, 0)

			// Cache the end to calculate the length later.
			let end := str
			// Store "0123456789abcdef" in scratch space.
			mstore(0x0f, 0x30313233343536373839616263646566)

			let start := sub(str, add(length, length))
			let w := not(1) // Tsk.
			let temp := value
			// We write the string from rightmost digit to leftmost digit.
			// The following is essentially a do-while loop that also handles the zero case.
			for {} 1 {} {
				str := add(str, w) // `sub(str, 2)`.
				mstore8(add(str, 1), mload(and(temp, 15)))
				mstore8(str, mload(and(shr(4, temp), 15)))
				temp := shr(8, temp)
				if iszero(xor(str, start)) { break }
			}

			if temp {
				mstore(0x00, 0x2194895a) // `HexLengthInsufficient()`.
				revert(0x1c, 0x04)
			}

			// Compute the string's length.
			let strLength := sub(end, str)
			// Move the pointer and write the length.
			str := sub(str, 0x20)
			mstore(str, strLength)
		}
	}

	/// @dev Returns the hexadecimal representation of `value`.
	/// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte.
	/// As address are 20 bytes long, the output will left-padded to have
	/// a length of `20 * 2 + 2` bytes.
	function toHexString(uint256 value) internal pure returns (string memory str) {
		str = toHexStringNoPrefix(value);
		/// @solidity memory-safe-assembly
		assembly {
			let strLength := add(mload(str), 2) // Compute the length.
			mstore(str, 0x3078) // Write the "0x" prefix.
			str := sub(str, 2) // Move the pointer.
			mstore(str, strLength) // Write the length.
		}
	}

	/// @dev Returns the hexadecimal representation of `value`.
	/// The output is prefixed with "0x".
	/// The output excludes leading "0" from the `toHexString` output.
	/// `0x00: "0x0", 0x01: "0x1", 0x12: "0x12", 0x123: "0x123"`.
	function toMinimalHexString(uint256 value) internal pure returns (string memory str) {
		str = toHexStringNoPrefix(value);
		/// @solidity memory-safe-assembly
		assembly {
			let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present.
			let strLength := add(mload(str), 2) // Compute the length.
			mstore(add(str, o), 0x3078) // Write the "0x" prefix, accounting for leading zero.
			str := sub(add(str, o), 2) // Move the pointer, accounting for leading zero.
			mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero.
		}
	}

	/// @dev Returns the hexadecimal representation of `value`.
	/// The output excludes leading "0" from the `toHexStringNoPrefix` output.
	/// `0x00: "0", 0x01: "1", 0x12: "12", 0x123: "123"`.
	function toMinimalHexStringNoPrefix(uint256 value) internal pure returns (string memory str) {
		str = toHexStringNoPrefix(value);
		/// @solidity memory-safe-assembly
		assembly {
			let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present.
			let strLength := mload(str) // Get the length.
			str := add(str, o) // Move the pointer, accounting for leading zero.
			mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero.
		}
	}

	/// @dev Returns the hexadecimal representation of `value`.
	/// The output is encoded using 2 hexadecimal digits per byte.
	/// As address are 20 bytes long, the output will left-padded to have
	/// a length of `20 * 2` bytes.
	function toHexStringNoPrefix(uint256 value) internal pure returns (string memory str) {
		/// @solidity memory-safe-assembly
		assembly {
			// We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
			// 0x02 bytes for the prefix, and 0x40 bytes for the digits.
			// The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x40) is 0xa0.
			str := add(mload(0x40), 0x80)
			// Allocate the memory.
			mstore(0x40, add(str, 0x20))
			// Zeroize the slot after the string.
			mstore(str, 0)

			// Cache the end to calculate the length later.
			let end := str
			// Store "0123456789abcdef" in scratch space.
			mstore(0x0f, 0x30313233343536373839616263646566)

			let w := not(1) // Tsk.
			// We write the string from rightmost digit to leftmost digit.
			// The following is essentially a do-while loop that also handles the zero case.
			for { let temp := value } 1 {} {
				str := add(str, w) // `sub(str, 2)`.
				mstore8(add(str, 1), mload(and(temp, 15)))
				mstore8(str, mload(and(shr(4, temp), 15)))
				temp := shr(8, temp)
				if iszero(temp) { break }
			}

			// Compute the string's length.
			let strLength := sub(end, str)
			// Move the pointer and write the length.
			str := sub(str, 0x20)
			mstore(str, strLength)
		}
	}

	/// @dev Returns the hexadecimal representation of `value`.
	/// The output is prefixed with "0x", encoded using 2 hexadecimal digits per byte,
	/// and the alphabets are capitalized conditionally according to
	/// https://eips.ethereum.org/EIPS/eip-55
	function toHexStringChecksummed(address value) internal pure returns (string memory str) {
		str = toHexString(value);
		/// @solidity memory-safe-assembly
		assembly {
			let mask := shl(6, div(not(0), 255)) // `0b010000000100000000 ...`
			let o := add(str, 0x22)
			let hashed := and(keccak256(o, 40), mul(34, mask)) // `0b10001000 ... `
			let t := shl(240, 136) // `0b10001000 << 240`
			for { let i := 0 } 1 {} {
				mstore(add(i, i), mul(t, byte(i, hashed)))
				i := add(i, 1)
				if eq(i, 20) { break }
			}
			mstore(o, xor(mload(o), shr(1, and(mload(0x00), and(mload(o), mask)))))
			o := add(o, 0x20)
			mstore(o, xor(mload(o), shr(1, and(mload(0x20), and(mload(o), mask)))))
		}
	}

	/// @dev Returns the hexadecimal representation of `value`.
	/// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte.
	function toHexString(address value) internal pure returns (string memory str) {
		str = toHexStringNoPrefix(value);
		/// @solidity memory-safe-assembly
		assembly {
			let strLength := add(mload(str), 2) // Compute the length.
			mstore(str, 0x3078) // Write the "0x" prefix.
			str := sub(str, 2) // Move the pointer.
			mstore(str, strLength) // Write the length.
		}
	}

	/// @dev Returns the hexadecimal representation of `value`.
	/// The output is encoded using 2 hexadecimal digits per byte.
	function toHexStringNoPrefix(address value) internal pure returns (string memory str) {
		/// @solidity memory-safe-assembly
		assembly {
			str := mload(0x40)

			// Allocate the memory.
			// We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
			// 0x02 bytes for the prefix, and 0x28 bytes for the digits.
			// The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x28) is 0x80.
			mstore(0x40, add(str, 0x80))

			// Store "0123456789abcdef" in scratch space.
			mstore(0x0f, 0x30313233343536373839616263646566)

			str := add(str, 2)
			mstore(str, 40)

			let o := add(str, 0x20)
			mstore(add(o, 40), 0)

			value := shl(96, value)

			// We write the string from rightmost digit to leftmost digit.
			// The following is essentially a do-while loop that also handles the zero case.
			for { let i := 0 } 1 {} {
				let p := add(o, add(i, i))
				let temp := byte(i, value)
				mstore8(add(p, 1), mload(and(temp, 15)))
				mstore8(p, mload(shr(4, temp)))
				i := add(i, 1)
				if eq(i, 20) { break }
			}
		}
	}

	/// @dev Returns the hex encoded string from the raw bytes.
	/// The output is encoded using 2 hexadecimal digits per byte.
	function toHexString(bytes memory raw) internal pure returns (string memory str) {
		str = toHexStringNoPrefix(raw);
		/// @solidity memory-safe-assembly
		assembly {
			let strLength := add(mload(str), 2) // Compute the length.
			mstore(str, 0x3078) // Write the "0x" prefix.
			str := sub(str, 2) // Move the pointer.
			mstore(str, strLength) // Write the length.
		}
	}

	/// @dev Returns the hex encoded string from the raw bytes.
	/// The output is encoded using 2 hexadecimal digits per byte.
	function toHexStringNoPrefix(bytes memory raw) internal pure returns (string memory str) {
		/// @solidity memory-safe-assembly
		assembly {
			let length := mload(raw)
			str := add(mload(0x40), 2) // Skip 2 bytes for the optional prefix.
			mstore(str, add(length, length)) // Store the length of the output.

			// Store "0123456789abcdef" in scratch space.
			mstore(0x0f, 0x30313233343536373839616263646566)

			let o := add(str, 0x20)
			let end := add(raw, length)

			for {} iszero(eq(raw, end)) {} {
				raw := add(raw, 1)
				mstore8(add(o, 1), mload(and(mload(raw), 15)))
				mstore8(o, mload(and(shr(4, mload(raw)), 15)))
				o := add(o, 2)
			}
			mstore(o, 0) // Zeroize the slot after the string.
			mstore(0x40, add(o, 0x20)) // Allocate the memory.
		}
	}

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                   RUNE STRING OPERATIONS                   */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Returns the number of UTF characters in the string.
	function runeCount(string memory s) internal pure returns (uint256 result) {
		/// @solidity memory-safe-assembly
		assembly {
			if mload(s) {
				mstore(0x00, div(not(0), 255))
				mstore(0x20, 0x0202020202020202020202020202020202020202020202020303030304040506)
				let o := add(s, 0x20)
				let end := add(o, mload(s))
				for { result := 1 } 1 { result := add(result, 1) } {
					o := add(o, byte(0, mload(shr(250, mload(o)))))
					if iszero(lt(o, end)) { break }
				}
			}
		}
	}

	/// @dev Returns if this string is a 7-bit ASCII string.
	/// (i.e. all characters codes are in [0..127])
	function is7BitASCII(string memory s) internal pure returns (bool result) {
		/// @solidity memory-safe-assembly
		assembly {
			let mask := shl(7, div(not(0), 255))
			result := 1
			let n := mload(s)
			if n {
				let o := add(s, 0x20)
				let end := add(o, n)
				let last := mload(end)
				mstore(end, 0)
				for {} 1 {} {
					if and(mask, mload(o)) {
						result := 0
						break
					}
					o := add(o, 0x20)
					if iszero(lt(o, end)) { break }
				}
				mstore(end, last)
			}
		}
	}

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                   BYTE STRING OPERATIONS                   */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	// For performance and bytecode compactness, byte string operations are restricted
	// to 7-bit ASCII strings. All offsets are byte offsets, not UTF character offsets.
	// Usage of byte string operations on charsets with runes spanning two or more bytes
	// can lead to undefined behavior.

	/// @dev Returns `subject` all occurrences of `search` replaced with `replacement`.
	function replace(string memory subject, string memory search, string memory replacement)
		internal
		pure
		returns (string memory result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let subjectLength := mload(subject)
			let searchLength := mload(search)
			let replacementLength := mload(replacement)

			subject := add(subject, 0x20)
			search := add(search, 0x20)
			replacement := add(replacement, 0x20)
			result := add(mload(0x40), 0x20)

			let subjectEnd := add(subject, subjectLength)
			if iszero(gt(searchLength, subjectLength)) {
				let subjectSearchEnd := add(sub(subjectEnd, searchLength), 1)
				let h := 0
				if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) }
				let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
				let s := mload(search)
				for {} 1 {} {
					let t := mload(subject)
					// Whether the first `searchLength % 32` bytes of
					// `subject` and `search` matches.
					if iszero(shr(m, xor(t, s))) {
						if h {
							if iszero(eq(keccak256(subject, searchLength), h)) {
								mstore(result, t)
								result := add(result, 1)
								subject := add(subject, 1)
								if iszero(lt(subject, subjectSearchEnd)) { break }
								continue
							}
						}
						// Copy the `replacement` one word at a time.
						for { let o := 0 } 1 {} {
							mstore(add(result, o), mload(add(replacement, o)))
							o := add(o, 0x20)
							if iszero(lt(o, replacementLength)) { break }
						}
						result := add(result, replacementLength)
						subject := add(subject, searchLength)
						if searchLength {
							if iszero(lt(subject, subjectSearchEnd)) { break }
							continue
						}
					}
					mstore(result, t)
					result := add(result, 1)
					subject := add(subject, 1)
					if iszero(lt(subject, subjectSearchEnd)) { break }
				}
			}

			let resultRemainder := result
			result := add(mload(0x40), 0x20)
			let k := add(sub(resultRemainder, result), sub(subjectEnd, subject))
			// Copy the rest of the string one word at a time.
			for {} lt(subject, subjectEnd) {} {
				mstore(resultRemainder, mload(subject))
				resultRemainder := add(resultRemainder, 0x20)
				subject := add(subject, 0x20)
			}
			result := sub(result, 0x20)
			let last := add(add(result, 0x20), k) // Zeroize the slot after the string.
			mstore(last, 0)
			mstore(0x40, add(last, 0x20)) // Allocate the memory.
			mstore(result, k) // Store the length.
		}
	}

	/// @dev Returns the byte index of the first location of `search` in `subject`,
	/// searching from left to right, starting from `from`.
	/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
	function indexOf(string memory subject, string memory search, uint256 from)
		internal
		pure
		returns (uint256 result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			for { let subjectLength := mload(subject) } 1 {} {
				if iszero(mload(search)) {
					if iszero(gt(from, subjectLength)) {
						result := from
						break
					}
					result := subjectLength
					break
				}
				let searchLength := mload(search)
				let subjectStart := add(subject, 0x20)

				result := not(0) // Initialize to `NOT_FOUND`.

				subject := add(subjectStart, from)
				let end := add(sub(add(subjectStart, subjectLength), searchLength), 1)

				let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
				let s := mload(add(search, 0x20))

				if iszero(and(lt(subject, end), lt(from, subjectLength))) { break }

				if iszero(lt(searchLength, 0x20)) {
					for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} {
						if iszero(shr(m, xor(mload(subject), s))) {
							if eq(keccak256(subject, searchLength), h) {
								result := sub(subject, subjectStart)
								break
							}
						}
						subject := add(subject, 1)
						if iszero(lt(subject, end)) { break }
					}
					break
				}
				for {} 1 {} {
					if iszero(shr(m, xor(mload(subject), s))) {
						result := sub(subject, subjectStart)
						break
					}
					subject := add(subject, 1)
					if iszero(lt(subject, end)) { break }
				}
				break
			}
		}
	}

	/// @dev Returns the byte index of the first location of `search` in `subject`,
	/// searching from left to right.
	/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
	function indexOf(string memory subject, string memory search)
		internal
		pure
		returns (uint256 result)
	{
		result = indexOf(subject, search, 0);
	}

	/// @dev Returns the byte index of the first location of `search` in `subject`,
	/// searching from right to left, starting from `from`.
	/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
	function lastIndexOf(string memory subject, string memory search, uint256 from)
		internal
		pure
		returns (uint256 result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			for {} 1 {} {
				result := not(0) // Initialize to `NOT_FOUND`.
				let searchLength := mload(search)
				if gt(searchLength, mload(subject)) { break }
				let w := result

				let fromMax := sub(mload(subject), searchLength)
				if iszero(gt(fromMax, from)) { from := fromMax }

				let end := add(add(subject, 0x20), w)
				subject := add(add(subject, 0x20), from)
				if iszero(gt(subject, end)) { break }
				// As this function is not too often used,
				// we shall simply use keccak256 for smaller bytecode size.
				for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} {
					if eq(keccak256(subject, searchLength), h) {
						result := sub(subject, add(end, 1))
						break
					}
					subject := add(subject, w) // `sub(subject, 1)`.
					if iszero(gt(subject, end)) { break }
				}
				break
			}
		}
	}

	/// @dev Returns the byte index of the first location of `search` in `subject`,
	/// searching from right to left.
	/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
	function lastIndexOf(string memory subject, string memory search)
		internal
		pure
		returns (uint256 result)
	{
		result = lastIndexOf(subject, search, uint256(int256(-1)));
	}

	/// @dev Returns true if `search` is found in `subject`, false otherwise.
	function contains(string memory subject, string memory search) internal pure returns (bool) {
		return indexOf(subject, search) != NOT_FOUND;
	}

	/// @dev Returns whether `subject` starts with `search`.
	function startsWith(string memory subject, string memory search)
		internal
		pure
		returns (bool result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let searchLength := mload(search)
			// Just using keccak256 directly is actually cheaper.
			// forgefmt: disable-next-item
			result := and(
				iszero(gt(searchLength, mload(subject))),
				eq(
					keccak256(add(subject, 0x20), searchLength),
					keccak256(add(search, 0x20), searchLength)
				)
			)
		}
	}

	/// @dev Returns whether `subject` ends with `search`.
	function endsWith(string memory subject, string memory search)
		internal
		pure
		returns (bool result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let searchLength := mload(search)
			let subjectLength := mload(subject)
			// Whether `search` is not longer than `subject`.
			let withinRange := iszero(gt(searchLength, subjectLength))
			// Just using keccak256 directly is actually cheaper.
			// forgefmt: disable-next-item
			result := and(
				withinRange,
				eq(
					keccak256(
						// `subject + 0x20 + max(subjectLength - searchLength, 0)`.
						add(add(subject, 0x20), mul(withinRange, sub(subjectLength, searchLength))),
						searchLength
					),
					keccak256(add(search, 0x20), searchLength)
				)
			)
		}
	}

	/// @dev Returns `subject` repeated `times`.
	function repeat(string memory subject, uint256 times)
		internal
		pure
		returns (string memory result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let subjectLength := mload(subject)
			if iszero(or(iszero(times), iszero(subjectLength))) {
				subject := add(subject, 0x20)
				result := mload(0x40)
				let output := add(result, 0x20)
				for {} 1 {} {
					// Copy the `subject` one word at a time.
					for { let o := 0 } 1 {} {
						mstore(add(output, o), mload(add(subject, o)))
						o := add(o, 0x20)
						if iszero(lt(o, subjectLength)) { break }
					}
					output := add(output, subjectLength)
					times := sub(times, 1)
					if iszero(times) { break }
				}
				mstore(output, 0) // Zeroize the slot after the string.
				let resultLength := sub(output, add(result, 0x20))
				mstore(result, resultLength) // Store the length.
				// Allocate the memory.
				mstore(0x40, add(result, add(resultLength, 0x20)))
			}
		}
	}

	/// @dev Returns a copy of `subject` sliced from `start` to `end` (exclusive).
	/// `start` and `end` are byte offsets.
	function slice(string memory subject, uint256 start, uint256 end)
		internal
		pure
		returns (string memory result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let subjectLength := mload(subject)
			if iszero(gt(subjectLength, end)) { end := subjectLength }
			if iszero(gt(subjectLength, start)) { start := subjectLength }
			if lt(start, end) {
				result := mload(0x40)
				let resultLength := sub(end, start)
				mstore(result, resultLength)
				subject := add(subject, start)
				let w := not(0x1f)
				// Copy the `subject` one word at a time, backwards.
				for { let o := and(add(resultLength, 0x1f), w) } 1 {} {
					mstore(add(result, o), mload(add(subject, o)))
					o := add(o, w) // `sub(o, 0x20)`.
					if iszero(o) { break }
				}
				// Zeroize the slot after the string.
				mstore(add(add(result, 0x20), resultLength), 0)
				// Allocate memory for the length and the bytes,
				// rounded up to a multiple of 32.
				mstore(0x40, add(result, and(add(resultLength, 0x3f), w)))
			}
		}
	}

	/// @dev Returns a copy of `subject` sliced from `start` to the end of the string.
	/// `start` is a byte offset.
	function slice(string memory subject, uint256 start)
		internal
		pure
		returns (string memory result)
	{
		result = slice(subject, start, uint256(int256(-1)));
	}

	/// @dev Returns all the indices of `search` in `subject`.
	/// The indices are byte offsets.
	function indicesOf(string memory subject, string memory search)
		internal
		pure
		returns (uint256[] memory result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let subjectLength := mload(subject)
			let searchLength := mload(search)

			if iszero(gt(searchLength, subjectLength)) {
				subject := add(subject, 0x20)
				search := add(search, 0x20)
				result := add(mload(0x40), 0x20)

				let subjectStart := subject
				let subjectSearchEnd := add(sub(add(subject, subjectLength), searchLength), 1)
				let h := 0
				if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) }
				let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
				let s := mload(search)
				for {} 1 {} {
					let t := mload(subject)
					// Whether the first `searchLength % 32` bytes of
					// `subject` and `search` matches.
					if iszero(shr(m, xor(t, s))) {
						if h {
							if iszero(eq(keccak256(subject, searchLength), h)) {
								subject := add(subject, 1)
								if iszero(lt(subject, subjectSearchEnd)) { break }
								continue
							}
						}
						// Append to `result`.
						mstore(result, sub(subject, subjectStart))
						result := add(result, 0x20)
						// Advance `subject` by `searchLength`.
						subject := add(subject, searchLength)
						if searchLength {
							if iszero(lt(subject, subjectSearchEnd)) { break }
							continue
						}
					}
					subject := add(subject, 1)
					if iszero(lt(subject, subjectSearchEnd)) { break }
				}
				let resultEnd := result
				// Assign `result` to the free memory pointer.
				result := mload(0x40)
				// Store the length of `result`.
				mstore(result, shr(5, sub(resultEnd, add(result, 0x20))))
				// Allocate memory for result.
				// We allocate one more word, so this array can be recycled for {split}.
				mstore(0x40, add(resultEnd, 0x20))
			}
		}
	}

	/// @dev Returns a arrays of strings based on the `delimiter` inside of the `subject` string.
	function split(string memory subject, string memory delimiter)
		internal
		pure
		returns (string[] memory result)
	{
		uint256[] memory indices = indicesOf(subject, delimiter);
		/// @solidity memory-safe-assembly
		assembly {
			let w := not(0x1f)
			let indexPtr := add(indices, 0x20)
			let indicesEnd := add(indexPtr, shl(5, add(mload(indices), 1)))
			mstore(add(indicesEnd, w), mload(subject))
			mstore(indices, add(mload(indices), 1))
			let prevIndex := 0
			for {} 1 {} {
				let index := mload(indexPtr)
				mstore(indexPtr, 0x60)
				if iszero(eq(index, prevIndex)) {
					let element := mload(0x40)
					let elementLength := sub(index, prevIndex)
					mstore(element, elementLength)
					// Copy the `subject` one word at a time, backwards.
					for { let o := and(add(elementLength, 0x1f), w) } 1 {} {
						mstore(add(element, o), mload(add(add(subject, prevIndex), o)))
						o := add(o, w) // `sub(o, 0x20)`.
						if iszero(o) { break }
					}
					// Zeroize the slot after the string.
					mstore(add(add(element, 0x20), elementLength), 0)
					// Allocate memory for the length and the bytes,
					// rounded up to a multiple of 32.
					mstore(0x40, add(element, and(add(elementLength, 0x3f), w)))
					// Store the `element` into the array.
					mstore(indexPtr, element)
				}
				prevIndex := add(index, mload(delimiter))
				indexPtr := add(indexPtr, 0x20)
				if iszero(lt(indexPtr, indicesEnd)) { break }
			}
			result := indices
			if iszero(mload(delimiter)) {
				result := add(indices, 0x20)
				mstore(result, sub(mload(indices), 2))
			}
		}
	}

	/// @dev Returns a concatenated string of `a` and `b`.
	/// Cheaper than `string.concat()` and does not de-align the free memory pointer.
	function concat(string memory a, string memory b)
		internal
		pure
		returns (string memory result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let w := not(0x1f)
			result := mload(0x40)
			let aLength := mload(a)
			// Copy `a` one word at a time, backwards.
			for { let o := and(add(aLength, 0x20), w) } 1 {} {
				mstore(add(result, o), mload(add(a, o)))
				o := add(o, w) // `sub(o, 0x20)`.
				if iszero(o) { break }
			}
			let bLength := mload(b)
			let output := add(result, aLength)
			// Copy `b` one word at a time, backwards.
			for { let o := and(add(bLength, 0x20), w) } 1 {} {
				mstore(add(output, o), mload(add(b, o)))
				o := add(o, w) // `sub(o, 0x20)`.
				if iszero(o) { break }
			}
			let totalLength := add(aLength, bLength)
			let last := add(add(result, 0x20), totalLength)
			// Zeroize the slot after the string.
			mstore(last, 0)
			// Stores the length.
			mstore(result, totalLength)
			// Allocate memory for the length and the bytes,
			// rounded up to a multiple of 32.
			mstore(0x40, and(add(last, 0x1f), w))
		}
	}

	/// @dev Returns a copy of the string in either lowercase or UPPERCASE.
	/// WARNING! This function is only compatible with 7-bit ASCII strings.
	function toCase(string memory subject, bool toUpper)
		internal
		pure
		returns (string memory result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let length := mload(subject)
			if length {
				result := add(mload(0x40), 0x20)
				subject := add(subject, 1)
				let flags := shl(add(70, shl(5, toUpper)), 0x3ffffff)
				let w := not(0)
				for { let o := length } 1 {} {
					o := add(o, w)
					let b := and(0xff, mload(add(subject, o)))
					mstore8(add(result, o), xor(b, and(shr(b, flags), 0x20)))
					if iszero(o) { break }
				}
				result := mload(0x40)
				mstore(result, length) // Store the length.
				let last := add(add(result, 0x20), length)
				mstore(last, 0) // Zeroize the slot after the string.
				mstore(0x40, add(last, 0x20)) // Allocate the memory.
			}
		}
	}

	/// @dev Returns a string from a small bytes32 string.
	/// `s` must be null-terminated, or behavior will be undefined.
	function fromSmallString(bytes32 s) internal pure returns (string memory result) {
		/// @solidity memory-safe-assembly
		assembly {
			result := mload(0x40)
			let n := 0
			for {} byte(n, s) { n := add(n, 1) } {} // Scan for '\0'.
			mstore(result, n)
			let o := add(result, 0x20)
			mstore(o, s)
			mstore(add(o, n), 0)
			mstore(0x40, add(result, 0x40))
		}
	}

	/// @dev Returns the small string, with all bytes after the first null byte zeroized.
	function normalizeSmallString(bytes32 s) internal pure returns (bytes32 result) {
		/// @solidity memory-safe-assembly
		assembly {
			for {} byte(result, s) { result := add(result, 1) } {} // Scan for '\0'.
			mstore(0x00, s)
			mstore(result, 0x00)
			result := mload(0x00)
		}
	}

	/// @dev Returns the string as a normalized null-terminated small string.
	function toSmallString(string memory s) internal pure returns (bytes32 result) {
		/// @solidity memory-safe-assembly
		assembly {
			result := mload(s)
			if iszero(lt(result, 33)) {
				mstore(0x00, 0xec92f9a3) // `TooBigForSmallString()`.
				revert(0x1c, 0x04)
			}
			result := shl(shl(3, sub(32, result)), mload(add(s, result)))
		}
	}

	/// @dev Returns a lowercased copy of the string.
	/// WARNING! This function is only compatible with 7-bit ASCII strings.
	function lower(string memory subject) internal pure returns (string memory result) {
		result = toCase(subject, false);
	}

	/// @dev Returns an UPPERCASED copy of the string.
	/// WARNING! This function is only compatible with 7-bit ASCII strings.
	function upper(string memory subject) internal pure returns (string memory result) {
		result = toCase(subject, true);
	}

	/// @dev Escapes the string to be used within HTML tags.
	function escapeHTML(string memory s) internal pure returns (string memory result) {
		/// @solidity memory-safe-assembly
		assembly {
			let end := add(s, mload(s))
			result := add(mload(0x40), 0x20)
			// Store the bytes of the packed offsets and strides into the scratch space.
			// `packed = (stride << 5) | offset`. Max offset is 20. Max stride is 6.
			mstore(0x1f, 0x900094)
			mstore(0x08, 0xc0000000a6ab)
			// Store "&quot;&amp;&#39;&lt;&gt;" into the scratch space.
			mstore(0x00, shl(64, 0x2671756f743b26616d703b262333393b266c743b2667743b))
			for {} iszero(eq(s, end)) {} {
				s := add(s, 1)
				let c := and(mload(s), 0xff)
				// Not in `["\"","'","&","<",">"]`.
				if iszero(and(shl(c, 1), 0x500000c400000000)) {
					mstore8(result, c)
					result := add(result, 1)
					continue
				}
				let t := shr(248, mload(c))
				mstore(result, mload(and(t, 0x1f)))
				result := add(result, shr(5, t))
			}
			let last := result
			mstore(last, 0) // Zeroize the slot after the string.
			result := mload(0x40)
			mstore(result, sub(last, add(result, 0x20))) // Store the length.
			mstore(0x40, add(last, 0x20)) // Allocate the memory.
		}
	}

	/// @dev Escapes the string to be used within double-quotes in a JSON.
	/// If `addDoubleQuotes` is true, the result will be enclosed in double-quotes.
	function escapeJSON(string memory s, bool addDoubleQuotes)
		internal
		pure
		returns (string memory result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			let end := add(s, mload(s))
			result := add(mload(0x40), 0x20)
			if addDoubleQuotes {
				mstore8(result, 34)
				result := add(1, result)
			}
			// Store "\\u0000" in scratch space.
			// Store "0123456789abcdef" in scratch space.
			// Also, store `{0x08:"b", 0x09:"t", 0x0a:"n", 0x0c:"f", 0x0d:"r"}`.
			// into the scratch space.
			mstore(0x15, 0x5c75303030303031323334353637383961626364656662746e006672)
			// Bitmask for detecting `["\"","\\"]`.
			let e := or(shl(0x22, 1), shl(0x5c, 1))
			for {} iszero(eq(s, end)) {} {
				s := add(s, 1)
				let c := and(mload(s), 0xff)
				if iszero(lt(c, 0x20)) {
					if iszero(and(shl(c, 1), e)) {
						// Not in `["\"","\\"]`.
						mstore8(result, c)
						result := add(result, 1)
						continue
					}
					mstore8(result, 0x5c) // "\\".
					mstore8(add(result, 1), c)
					result := add(result, 2)
					continue
				}
				if iszero(and(shl(c, 1), 0x3700)) {
					// Not in `["\b","\t","\n","\f","\d"]`.
					mstore8(0x1d, mload(shr(4, c))) // Hex value.
					mstore8(0x1e, mload(and(c, 15))) // Hex value.
					mstore(result, mload(0x19)) // "\\u00XX".
					result := add(result, 6)
					continue
				}
				mstore8(result, 0x5c) // "\\".
				mstore8(add(result, 1), mload(add(c, 8)))
				result := add(result, 2)
			}
			if addDoubleQuotes {
				mstore8(result, 34)
				result := add(1, result)
			}
			let last := result
			mstore(last, 0) // Zeroize the slot after the string.
			result := mload(0x40)
			mstore(result, sub(last, add(result, 0x20))) // Store the length.
			mstore(0x40, add(last, 0x20)) // Allocate the memory.
		}
	}

	/// @dev Escapes the string to be used within double-quotes in a JSON.
	function escapeJSON(string memory s) internal pure returns (string memory result) {
		result = escapeJSON(s, false);
	}

	/// @dev Returns whether `a` equals `b`.
	function eq(string memory a, string memory b) internal pure returns (bool result) {
		/// @solidity memory-safe-assembly
		assembly {
			result := eq(keccak256(add(a, 0x20), mload(a)), keccak256(add(b, 0x20), mload(b)))
		}
	}

	/// @dev Returns whether `a` equals `b`, where `b` is a null-terminated small string.
	function eqs(string memory a, bytes32 b) internal pure returns (bool result) {
		/// @solidity memory-safe-assembly
		assembly {
			// These should be evaluated on compile time, as far as possible.
			let m := not(shl(7, div(not(iszero(b)), 255))) // `0x7f7f ...`.
			let x := not(or(m, or(b, add(m, and(b, m)))))
			let r := shl(7, iszero(iszero(shr(128, x))))
			r := or(r, shl(6, iszero(iszero(shr(64, shr(r, x))))))
			r := or(r, shl(5, lt(0xffffffff, shr(r, x))))
			r := or(r, shl(4, lt(0xffff, shr(r, x))))
			r := or(r, shl(3, lt(0xff, shr(r, x))))
			// forgefmt: disable-next-item
			result := gt(eq(mload(a), add(iszero(x), xor(31, shr(3, r)))),
				xor(shr(add(8, r), b), shr(add(8, r), mload(add(a, 0x20)))))
		}
	}

	/// @dev Packs a single string with its length into a single word.
	/// Returns `bytes32(0)` if the length is zero or greater than 31.
	function packOne(string memory a) internal pure returns (bytes32 result) {
		/// @solidity memory-safe-assembly
		assembly {
			// We don't need to zero right pad the string,
			// since this is our own custom non-standard packing scheme.
			result :=
				mul(
					// Load the length and the bytes.
					mload(add(a, 0x1f)),
					// `length != 0 && length < 32`. Abuses underflow.
					// Assumes that the length is valid and within the block gas limit.
					lt(sub(mload(a), 1), 0x1f)
				)
		}
	}

	/// @dev Unpacks a string packed using {packOne}.
	/// Returns the empty string if `packed` is `bytes32(0)`.
	/// If `packed` is not an output of {packOne}, the output behavior is undefined.
	function unpackOne(bytes32 packed) internal pure returns (string memory result) {
		/// @solidity memory-safe-assembly
		assembly {
			// Grab the free memory pointer.
			result := mload(0x40)
			// Allocate 2 words (1 for the length, 1 for the bytes).
			mstore(0x40, add(result, 0x40))
			// Zeroize the length slot.
			mstore(result, 0)
			// Store the length and bytes.
			mstore(add(result, 0x1f), packed)
			// Right pad with zeroes.
			mstore(add(add(result, 0x20), mload(result)), 0)
		}
	}

	/// @dev Packs two strings with their lengths into a single word.
	/// Returns `bytes32(0)` if combined length is zero or greater than 30.
	function packTwo(string memory a, string memory b) internal pure returns (bytes32 result) {
		/// @solidity memory-safe-assembly
		assembly {
			let aLength := mload(a)
			// We don't need to zero right pad the strings,
			// since this is our own custom non-standard packing scheme.
			result :=
				mul(
					// Load the length and the bytes of `a` and `b`.
					or(
						shl(shl(3, sub(0x1f, aLength)), mload(add(a, aLength))),
						mload(sub(add(b, 0x1e), aLength))
					),
					// `totalLength != 0 && totalLength < 31`. Abuses underflow.
					// Assumes that the lengths are valid and within the block gas limit.
					lt(sub(add(aLength, mload(b)), 1), 0x1e)
				)
		}
	}

	/// @dev Unpacks strings packed using {packTwo}.
	/// Returns the empty strings if `packed` is `bytes32(0)`.
	/// If `packed` is not an output of {packTwo}, the output behavior is undefined.
	function unpackTwo(bytes32 packed)
		internal
		pure
		returns (string memory resultA, string memory resultB)
	{
		/// @solidity memory-safe-assembly
		assembly {
			// Grab the free memory pointer.
			resultA := mload(0x40)
			resultB := add(resultA, 0x40)
			// Allocate 2 words for each string (1 for the length, 1 for the byte). Total 4 words.
			mstore(0x40, add(resultB, 0x40))
			// Zeroize the length slots.
			mstore(resultA, 0)
			mstore(resultB, 0)
			// Store the lengths and bytes.
			mstore(add(resultA, 0x1f), packed)
			mstore(add(resultB, 0x1f), mload(add(add(resultA, 0x20), mload(resultA))))
			// Right pad with zeroes.
			mstore(add(add(resultA, 0x20), mload(resultA)), 0)
			mstore(add(add(resultB, 0x20), mload(resultB)), 0)
		}
	}

	/// @dev Directly returns `a` without copying.
	function directReturn(string memory a) internal pure {
		assembly {
			// Assumes that the string does not start from the scratch space.
			let retStart := sub(a, 0x20)
			let retSize := add(mload(a), 0x40)
			// Right pad with zeroes. Just in case the string is produced
			// by a method that doesn't zero right pad.
			mstore(add(retStart, retSize), 0)
			// Store the return offset.
			mstore(retStart, 0x20)
			// End the transaction, returning the string.
			return(retStart, retSize)
		}
	}
}

// File: https://github.com/Vectorized/solady/blob/main/src/auth/Ownable.sol


pragma solidity ^0.8.4;

/// @notice Simple single owner authorization mixin.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/auth/Ownable.sol)
///
/// @dev Note:
/// This implementation does NOT auto-initialize the owner to `msg.sender`.
/// You MUST call the `_initializeOwner` in the constructor / initializer.
///
/// While the ownable portion follows
/// [EIP-173](https://eips.ethereum.org/EIPS/eip-173) for compatibility,
/// the nomenclature for the 2-step ownership handover may be unique to this codebase.
abstract contract Ownable {
	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                       CUSTOM ERRORS                        */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev The caller is not authorized to call the function.
	error Unauthorized();

	/// @dev The `newOwner` cannot be the zero address.
	error NewOwnerIsZeroAddress();

	/// @dev The `pendingOwner` does not have a valid handover request.
	error NoHandoverRequest();

	/// @dev Cannot double-initialize.
	error AlreadyInitialized();

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                           EVENTS                           */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev The ownership is transferred from `oldOwner` to `newOwner`.
	/// This event is intentionally kept the same as OpenZeppelin's Ownable to be
	/// compatible with indexers and [EIP-173](https://eips.ethereum.org/EIPS/eip-173),
	/// despite it not being as lightweight as a single argument event.
	event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);

	/// @dev An ownership handover to `pendingOwner` has been requested.
	event OwnershipHandoverRequested(address indexed pendingOwner);

	/// @dev The ownership handover to `pendingOwner` has been canceled.
	event OwnershipHandoverCanceled(address indexed pendingOwner);

	/// @dev `keccak256(bytes("OwnershipTransferred(address,address)"))`.
	uint256 private constant _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE =
		0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0;

	/// @dev `keccak256(bytes("OwnershipHandoverRequested(address)"))`.
	uint256 private constant _OWNERSHIP_HANDOVER_REQUESTED_EVENT_SIGNATURE =
		0xdbf36a107da19e49527a7176a1babf963b4b0ff8cde35ee35d6cd8f1f9ac7e1d;

	/// @dev `keccak256(bytes("OwnershipHandoverCanceled(address)"))`.
	uint256 private constant _OWNERSHIP_HANDOVER_CANCELED_EVENT_SIGNATURE =
		0xfa7b8eab7da67f412cc9575ed43464468f9bfbae89d1675917346ca6d8fe3c92;

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                          STORAGE                           */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev The owner slot is given by:
	/// `bytes32(~uint256(uint32(bytes4(keccak256("_OWNER_SLOT_NOT")))))`.
	/// It is intentionally chosen to be a high value
	/// to avoid collision with lower slots.
	/// The choice of manual storage layout is to enable compatibility
	/// with both regular and upgradeable contracts.
	bytes32 internal constant _OWNER_SLOT =
		0xffffffffffffffffffffffffffffffffffffffffffffffffffffffff74873927;

	/// The ownership handover slot of `newOwner` is given by:
	/// ```
	///     mstore(0x00, or(shl(96, user), _HANDOVER_SLOT_SEED))
	///     let handoverSlot := keccak256(0x00, 0x20)
	/// ```
	/// It stores the expiry timestamp of the two-step ownership handover.
	uint256 private constant _HANDOVER_SLOT_SEED = 0x389a75e1;

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                     INTERNAL FUNCTIONS                     */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Override to return true to make `_initializeOwner` prevent double-initialization.
	function _guardInitializeOwner() internal pure virtual returns (bool guard) {}

	/// @dev Initializes the owner directly without authorization guard.
	/// This function must be called upon initialization,
	/// regardless of whether the contract is upgradeable or not.
	/// This is to enable generalization to both regular and upgradeable contracts,
	/// and to save gas in case the initial owner is not the caller.
	/// For performance reasons, this function will not check if there
	/// is an existing owner.
	function _initializeOwner(address newOwner) internal virtual {
		if (_guardInitializeOwner()) {
			/// @solidity memory-safe-assembly
			assembly {
				let ownerSlot := _OWNER_SLOT
				if sload(ownerSlot) {
					mstore(0x00, 0x0dc149f0) // `AlreadyInitialized()`.
					revert(0x1c, 0x04)
				}
				// Clean the upper 96 bits.
				newOwner := shr(96, shl(96, newOwner))
				// Store the new value.
				sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
				// Emit the {OwnershipTransferred} event.
				log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
			}
		} else {
			/// @solidity memory-safe-assembly
			assembly {
				// Clean the upper 96 bits.
				newOwner := shr(96, shl(96, newOwner))
				// Store the new value.
				sstore(_OWNER_SLOT, newOwner)
				// Emit the {OwnershipTransferred} event.
				log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
			}
		}
	}

	/// @dev Sets the owner directly without authorization guard.
	function _setOwner(address newOwner) internal virtual {
		if (_guardInitializeOwner()) {
			/// @solidity memory-safe-assembly
			assembly {
				let ownerSlot := _OWNER_SLOT
				// Clean the upper 96 bits.
				newOwner := shr(96, shl(96, newOwner))
				// Emit the {OwnershipTransferred} event.
				log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
				// Store the new value.
				sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
			}
		} else {
			/// @solidity memory-safe-assembly
			assembly {
				let ownerSlot := _OWNER_SLOT
				// Clean the upper 96 bits.
				newOwner := shr(96, shl(96, newOwner))
				// Emit the {OwnershipTransferred} event.
				log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
				// Store the new value.
				sstore(ownerSlot, newOwner)
			}
		}
	}

	/// @dev Throws if the sender is not the owner.
	function _checkOwner() internal view virtual {
		/// @solidity memory-safe-assembly
		assembly {
			// If the caller is not the stored owner, revert.
			if iszero(eq(caller(), sload(_OWNER_SLOT))) {
				mstore(0x00, 0x82b42900) // `Unauthorized()`.
				revert(0x1c, 0x04)
			}
		}
	}

	/// @dev Returns how long a two-step ownership handover is valid for in seconds.
	/// Override to return a different value if needed.
	/// Made internal to conserve bytecode. Wrap it in a public function if needed.
	function _ownershipHandoverValidFor() internal view virtual returns (uint64) {
		return 48 * 3600;
	}

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                  PUBLIC UPDATE FUNCTIONS                   */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Allows the owner to transfer the ownership to `newOwner`.
	function transferOwnership(address newOwner) public payable virtual onlyOwner {
		/// @solidity memory-safe-assembly
		assembly {
			if iszero(shl(96, newOwner)) {
				mstore(0x00, 0x7448fbae) // `NewOwnerIsZeroAddress()`.
				revert(0x1c, 0x04)
			}
		}
		_setOwner(newOwner);
	}

	/// @dev Allows the owner to renounce their ownership.
	function renounceOwnership() public payable virtual onlyOwner {
		_setOwner(address(0));
	}

	/// @dev Request a two-step ownership handover to the caller.
	/// The request will automatically expire in 48 hours (172800 seconds) by default.
	function requestOwnershipHandover() public payable virtual {
		unchecked {
			uint256 expires = block.timestamp + _ownershipHandoverValidFor();
			/// @solidity memory-safe-assembly
			assembly {
				// Compute and set the handover slot to `expires`.
				mstore(0x0c, _HANDOVER_SLOT_SEED)
				mstore(0x00, caller())
				sstore(keccak256(0x0c, 0x20), expires)
				// Emit the {OwnershipHandoverRequested} event.
				log2(0, 0, _OWNERSHIP_HANDOVER_REQUESTED_EVENT_SIGNATURE, caller())
			}
		}
	}

	/// @dev Cancels the two-step ownership handover to the caller, if any.
	function cancelOwnershipHandover() public payable virtual {
		/// @solidity memory-safe-assembly
		assembly {
			// Compute and set the handover slot to 0.
			mstore(0x0c, _HANDOVER_SLOT_SEED)
			mstore(0x00, caller())
			sstore(keccak256(0x0c, 0x20), 0)
			// Emit the {OwnershipHandoverCanceled} event.
			log2(0, 0, _OWNERSHIP_HANDOVER_CANCELED_EVENT_SIGNATURE, caller())
		}
	}

	/// @dev Allows the owner to complete the two-step ownership handover to `pendingOwner`.
	/// Reverts if there is no existing ownership handover requested by `pendingOwner`.
	function completeOwnershipHandover(address pendingOwner) public payable virtual onlyOwner {
		/// @solidity memory-safe-assembly
		assembly {
			// Compute and set the handover slot to 0.
			mstore(0x0c, _HANDOVER_SLOT_SEED)
			mstore(0x00, pendingOwner)
			let handoverSlot := keccak256(0x0c, 0x20)
			// If the handover does not exist, or has expired.
			if gt(timestamp(), sload(handoverSlot)) {
				mstore(0x00, 0x6f5e8818) // `NoHandoverRequest()`.
				revert(0x1c, 0x04)
			}
			// Set the handover slot to 0.
			sstore(handoverSlot, 0)
		}
		_setOwner(pendingOwner);
	}

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                   PUBLIC READ FUNCTIONS                    */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Returns the owner of the contract.
	function owner() public view virtual returns (address result) {
		/// @solidity memory-safe-assembly
		assembly {
			result := sload(_OWNER_SLOT)
		}
	}

	/// @dev Returns the expiry timestamp for the two-step ownership handover to `pendingOwner`.
	function ownershipHandoverExpiresAt(address pendingOwner)
		public
		view
		virtual
		returns (uint256 result)
	{
		/// @solidity memory-safe-assembly
		assembly {
			// Compute the handover slot.
			mstore(0x0c, _HANDOVER_SLOT_SEED)
			mstore(0x00, pendingOwner)
			// Load the handover slot.
			result := sload(keccak256(0x0c, 0x20))
		}
	}

	/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
	/*                         MODIFIERS                          */
	/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

	/// @dev Marks a function as only callable by the owner.
	modifier onlyOwner() virtual {
		_checkOwner();
		_;
	}
}

// File: https://github.com/Vectorized/dn404/blob/main/src/DN404Mirror.sol


pragma solidity ^0.8.4;

/// @title DN404Mirror
/// @notice DN404Mirror provides an interface for interacting with the
/// NFT tokens in a DN404 implementation.
///
/// @author vectorized.eth (@optimizoor)
/// @author Quit (@0xQuit)
/// @author Michael Amadi (@AmadiMichaels)
/// @author cygaar (@0xCygaar)
/// @author Thomas (@0xjustadev)
/// @author Harrison (@PopPunkOnChain)
///
/// @dev Note:
/// - The ERC721 data is stored in the base DN404 contract.
contract DN404Mirror is Ownable {
	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                           EVENTS                           */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Emitted when token `id` is transferred from `from` to `to`.
	event Transfer(address indexed from, address indexed to, uint256 indexed id);

	/// @dev Emitted when `owner` enables `account` to manage the `id` token.
	event Approval(address indexed owner, address indexed account, uint256 indexed id);

	/// @dev Emitted when `owner` enables or disables `operator` to manage all of their tokens.
	event ApprovalForAll(address indexed owner, address indexed operator, bool isApproved);

	/// @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;

	/// @dev `keccak256(bytes("ApprovalForAll(address,address,bool)"))`.
	uint256 private constant _APPROVAL_FOR_ALL_EVENT_SIGNATURE =
		0x17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31;

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                        CUSTOM ERRORS                       */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Thrown when a call for an NFT function did not originate
	/// from the base DN404 contract.
	error SenderNotBase();

	/// @dev Thrown when a call for an NFT function did not originate from the deployer.
	error SenderNotDeployer();

	/// @dev Thrown when transferring an NFT to a contract address that
	/// does not implement ERC721Receiver.
	error TransferToNonERC721ReceiverImplementer();

	/// @dev Thrown when linking to the DN404 base contract and the
	/// DN404 supportsInterface check fails or the call reverts.
	error CannotLink();

	/// @dev Thrown when a linkMirrorContract call is received and the
	/// NFT mirror contract has already been linked to a DN404 base contract.
	error AlreadyLinked();

	/// @dev Thrown when retrieving the base DN404 address when a link has not
	/// been established.
	error NotLinked();

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                          STORAGE                           */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Struct contain the NFT mirror contract storage.
	struct DN404NFTStorage {
		address baseERC20;
		address deployer;
	}

	/// @dev Returns a storage pointer for DN404NFTStorage.
	function _getDN404NFTStorage() internal pure virtual returns (DN404NFTStorage storage $) {
		/// @solidity memory-safe-assembly
		assembly {
			// `uint72(bytes9(keccak256("DN404_MIRROR_STORAGE")))`.
			$.slot := 0x3602298b8c10b01230 // Truncate to 9 bytes to reduce bytecode size.
		}
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                        CONSTRUCTOR                         */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	constructor(address deployer) {
		// For non-proxies, we will store the deployer so that only the deployer can
		// link the base contract.
		_getDN404NFTStorage().deployer = deployer;
		_initializeOwner(deployer);
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                     ERC721 OPERATIONS                      */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Returns the token collection name from the base DN404 contract.
	function name() public view virtual returns (string memory result) {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			result := mload(0x40)
			mstore(0x00, 0x06fdde03) // `name()`.
			if iszero(staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x00)) {
				returndatacopy(result, 0x00, returndatasize())
				revert(result, returndatasize())
			}
			returndatacopy(0x00, 0x00, 0x20)
			returndatacopy(result, mload(0x00), 0x20)
			returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result))
			mstore(0x40, add(add(result, 0x20), mload(result)))
		}
	}

	/// @dev Returns the token collection symbol from the base DN404 contract.
	function symbol() public view virtual returns (string memory result) {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			result := mload(0x40)
			mstore(0x00, 0x95d89b41) // `symbol()`.
			if iszero(staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x00)) {
				returndatacopy(result, 0x00, returndatasize())
				revert(result, returndatasize())
			}
			returndatacopy(0x00, 0x00, 0x20)
			returndatacopy(result, mload(0x00), 0x20)
			returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result))
			mstore(0x40, add(add(result, 0x20), mload(result)))
		}
	}

	/// @dev Returns the Uniform Resource Identifier (URI) for token `id` from
	/// the base DN404 contract.
	function tokenURI(uint256 id) public view virtual returns (string memory result) {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			result := mload(0x40)
			mstore(0x20, id)
			mstore(0x00, 0xc87b56dd) // `tokenURI()`.
			if iszero(staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x00)) {
				returndatacopy(result, 0x00, returndatasize())
				revert(result, returndatasize())
			}
			returndatacopy(0x00, 0x00, 0x20)
			returndatacopy(result, mload(0x00), 0x20)
			returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result))
			mstore(0x40, add(add(result, 0x20), mload(result)))
		}
	}

	/// @dev Returns the total NFT supply from the base DN404 contract.
	function totalSupply() public view virtual returns (uint256 result) {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x00, 0xe2c79281) // `totalNFTSupply()`.
			if iszero(
				and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x20))
			) {
				returndatacopy(mload(0x40), 0x00, returndatasize())
				revert(mload(0x40), returndatasize())
			}
			result := mload(0x00)
		}
	}

	/// @dev Returns the number of NFT tokens owned by `owner` from the base DN404 contract.
	///
	/// Requirements:
	/// - `owner` must not be the zero address.
	function balanceOf(address owner) public view virtual returns (uint256 result) {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x20, shr(96, shl(96, owner)))
			mstore(0x00, 0xf5b100ea) // `balanceOfNFT(address)`.
			if iszero(
				and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x20))
			) {
				returndatacopy(mload(0x40), 0x00, returndatasize())
				revert(mload(0x40), returndatasize())
			}
			result := mload(0x00)
		}
	}

	/// @dev Returns the owner of token `id` from the base DN404 contract.
	///
	/// Requirements:
	/// - Token `id` must exist.
	function ownerOf(uint256 id) public view virtual returns (address result) {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x00, 0x6352211e) // `ownerOf(uint256)`.
			mstore(0x20, id)
			if iszero(
				and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x20))
			) {
				returndatacopy(mload(0x40), 0x00, returndatasize())
				revert(mload(0x40), returndatasize())
			}
			result := shr(96, mload(0x0c))
		}
	}

	/// @dev Sets `spender` as the approved account to manage token `id` in
	/// the base DN404 contract.
	///
	/// Requirements:
	/// - Token `id` must exist.
	/// - The caller must be the owner of the token,
	///   or an approved operator for the token owner.
	///
	/// Emits an {Approval} event.
	function approve(address spender, uint256 id) public virtual {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			spender := shr(96, shl(96, spender))
			let m := mload(0x40)
			mstore(0x00, 0xd10b6e0c) // `approveNFT(address,uint256,address)`.
			mstore(0x20, spender)
			mstore(0x40, id)
			mstore(0x60, caller())
			if iszero(
				and(
					gt(returndatasize(), 0x1f),
					call(gas(), base, callvalue(), 0x1c, 0x64, 0x00, 0x20)
				)
			) {
				returndatacopy(m, 0x00, returndatasize())
				revert(m, returndatasize())
			}
			mstore(0x40, m) // Restore the free memory pointer.
			mstore(0x60, 0) // Restore the zero pointer.
			// Emit the {Approval} event.
			log4(codesize(), 0x00, _APPROVAL_EVENT_SIGNATURE, shr(96, mload(0x0c)), spender, id)
		}
	}

	/// @dev Returns the account approved to manage token `id` from
	/// the base DN404 contract.
	///
	/// Requirements:
	/// - Token `id` must exist.
	function getApproved(uint256 id) public view virtual returns (address result) {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x00, 0x081812fc) // `getApproved(uint256)`.
			mstore(0x20, id)
			if iszero(
				and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x20))
			) {
				returndatacopy(mload(0x40), 0x00, returndatasize())
				revert(mload(0x40), returndatasize())
			}
			result := shr(96, mload(0x0c))
		}
	}

	/// @dev Sets whether `operator` is approved to manage the tokens of the caller in
	/// the base DN404 contract.
	///
	/// Emits an {ApprovalForAll} event.
	function setApprovalForAll(address operator, bool approved) public virtual {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			operator := shr(96, shl(96, operator))
			let m := mload(0x40)
			mstore(0x00, 0x813500fc) // `setApprovalForAll(address,bool,address)`.
			mstore(0x20, operator)
			mstore(0x40, iszero(iszero(approved)))
			mstore(0x60, caller())
			if iszero(
				and(eq(mload(0x00), 1), call(gas(), base, callvalue(), 0x1c, 0x64, 0x00, 0x20))
			) {
				returndatacopy(m, 0x00, returndatasize())
				revert(m, returndatasize())
			}
			// Emit the {ApprovalForAll} event.
			log3(0x40, 0x20, _APPROVAL_FOR_ALL_EVENT_SIGNATURE, caller(), operator)
			mstore(0x40, m) // Restore the free memory pointer.
			mstore(0x60, 0) // Restore the zero pointer.
		}
	}

	/// @dev Returns whether `operator` is approved to manage the tokens of `owner` from
	/// the base DN404 contract.
	function isApprovedForAll(address owner, address operator)
		public
		view
		virtual
		returns (bool result)
	{
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			let m := mload(0x40)
			mstore(0x40, operator)
			mstore(0x2c, shl(96, owner))
			mstore(0x0c, 0xe985e9c5000000000000000000000000) // `isApprovedForAll(address,address)`.
			if iszero(
				and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x44, 0x00, 0x20))
			) {
				returndatacopy(m, 0x00, returndatasize())
				revert(m, returndatasize())
			}
			mstore(0x40, m) // Restore the free memory pointer.
			result := iszero(iszero(mload(0x00)))
		}
	}

	/// @dev Transfers token `id` from `from` to `to`.
	///
	/// Requirements:
	///
	/// - Token `id` must exist.
	/// - `from` must be the owner of the token.
	/// - `to` cannot be the zero address.
	/// - The caller must be the owner of the token, or be approved to manage the token.
	///
	/// Emits a {Transfer} event.
	function transferFrom(address from, address to, uint256 id) public virtual {
		address base = baseERC20();
		/// @solidity memory-safe-assembly
		assembly {
			from := shr(96, shl(96, from))
			to := shr(96, shl(96, to))
			let m := mload(0x40)
			mstore(m, 0xe5eb36c8) // `transferFromNFT(address,address,uint256,address)`.
			mstore(add(m, 0x20), from)
			mstore(add(m, 0x40), to)
			mstore(add(m, 0x60), id)
			mstore(add(m, 0x80), caller())
			if iszero(
				and(eq(mload(m), 1), call(gas(), base, callvalue(), add(m, 0x1c), 0x84, m, 0x20))
			) {
				returndatacopy(m, 0x00, returndatasize())
				revert(m, returndatasize())
			}
			// Emit the {Transfer} event.
			log4(codesize(), 0x00, _TRANSFER_EVENT_SIGNATURE, from, to, id)
		}
	}

	/// @dev Equivalent to `safeTransferFrom(from, to, id, "")`.
	function safeTransferFrom(address from, address to, uint256 id) public payable virtual {
		transferFrom(from, to, id);

		if (_hasCode(to)) _checkOnERC721Received(from, to, id, "");
	}

	/// @dev Transfers token `id` from `from` to `to`.
	///
	/// Requirements:
	///
	/// - Token `id` must exist.
	/// - `from` must be the owner of the token.
	/// - `to` cannot be the zero address.
	/// - The caller must be the owner of the token, or be approved to manage the token.
	/// - If `to` refers to a smart contract, it must implement
	///   {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
	///
	/// Emits a {Transfer} event.
	function safeTransferFrom(address from, address to, uint256 id, bytes calldata data)
		public
		virtual
	{
		transferFrom(from, to, id);

		if (_hasCode(to)) _checkOnERC721Received(from, to, id, data);
	}

	/// @dev Returns true if this contract implements the interface defined by `interfaceId`.
	/// See: https://eips.ethereum.org/EIPS/eip-165
	/// This function call must use less than 30000 gas.
	function supportsInterface(bytes4 interfaceId) public view virtual returns (bool result) {
		/// @solidity memory-safe-assembly
		assembly {
			let s := shr(224, interfaceId)
			// ERC165: 0x01ffc9a7, ERC721: 0x80ac58cd, ERC721Metadata: 0x5b5e139f.
			result := or(or(eq(s, 0x01ffc9a7), eq(s, 0x80ac58cd)), eq(s, 0x5b5e139f))
		}
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                     MIRROR OPERATIONS                      */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Returns the address of the base DN404 contract.
	function baseERC20() public view virtual returns (address base) {
		base = _getDN404NFTStorage().baseERC20;
		if (base == address(0)) revert NotLinked();
	}

	/// @dev Fallback modifier to execute calls from the base DN404 contract.
	modifier dn404NFTFallback() virtual {
		DN404NFTStorage storage $ = _getDN404NFTStorage();

		uint256 fnSelector = _calldataload(0x00) >> 224;

		// `logTransfer(uint256[])`.
		if (fnSelector == 0x263c69d6) {
			if (msg.sender != $.baseERC20) revert SenderNotBase();
			/// @solidity memory-safe-assembly
			assembly {
				// When returndatacopy copies 1 or more out-of-bounds bytes, it reverts.
				returndatacopy(0x00, returndatasize(), lt(calldatasize(), 0x20))
				let o := add(0x24, calldataload(0x04)) // Packed logs offset.
				returndatacopy(0x00, returndatasize(), lt(calldatasize(), o))
				let end := add(o, shl(5, calldataload(sub(o, 0x20))))
				returndatacopy(0x00, returndatasize(), lt(calldatasize(), end))

				for {} iszero(eq(o, end)) { o := add(0x20, o) } {
					let d := calldataload(o) // Entry in the packed logs.
					let a := shr(96, d) // The address.
					let b := and(1, d) // Whether it is a burn.
					log4(
						codesize(),
						0x00,
						_TRANSFER_EVENT_SIGNATURE,
						mul(a, b),
						mul(a, iszero(b)),
						shr(168, shl(160, d))
					)
				}
				mstore(0x00, 0x01)
				return(0x00, 0x20)
			}
		}
		// `linkMirrorContract(address)`.
		if (fnSelector == 0x0f4599e5) {
			if ($.deployer != address(0)) {
				if (address(uint160(_calldataload(0x04))) != $.deployer) {
					revert SenderNotDeployer();
				}
			}
			if ($.baseERC20 != address(0)) revert AlreadyLinked();
			$.baseERC20 = msg.sender;
			/// @solidity memory-safe-assembly
			assembly {
				mstore(0x00, 0x01)
				return(0x00, 0x20)
			}
		}
		_;
	}

	/// @dev Fallback function for calls from base DN404 contract.
	fallback() external payable virtual dn404NFTFallback {}

	receive() external payable virtual {}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                      PRIVATE HELPERS                       */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Returns the calldata value at `offset`.
	function _calldataload(uint256 offset) private pure returns (uint256 value) {
		/// @solidity memory-safe-assembly
		assembly {
			value := calldataload(offset)
		}
	}

	/// @dev Returns if `a` has bytecode of non-zero length.
	function _hasCode(address a) private view returns (bool result) {
		/// @solidity memory-safe-assembly
		assembly {
			result := extcodesize(a) // Can handle dirty upper bits.
		}
	}

	/// @dev Perform a call to invoke {IERC721Receiver-onERC721Received} on `to`.
	/// Reverts if the target does not support the function correctly.
	function _checkOnERC721Received(address from, address to, uint256 id, bytes memory data)
		private
	{
		/// @solidity memory-safe-assembly
		assembly {
			// Prepare the calldata.
			let m := mload(0x40)
			let onERC721ReceivedSelector := 0x150b7a02
			mstore(m, onERC721ReceivedSelector)
			mstore(add(m, 0x20), caller()) // The `operator`, which is always `msg.sender`.
			mstore(add(m, 0x40), shr(96, shl(96, from)))
			mstore(add(m, 0x60), id)
			mstore(add(m, 0x80), 0x80)
			let n := mload(data)
			mstore(add(m, 0xa0), n)
			if n { pop(staticcall(gas(), 4, add(data, 0x20), n, add(m, 0xc0), n)) }
			// Revert if the call reverts.
			if iszero(call(gas(), to, 0, add(m, 0x1c), add(n, 0xa4), m, 0x20)) {
				if returndatasize() {
					// Bubble up the revert if the call reverts.
					returndatacopy(m, 0x00, returndatasize())
					revert(m, returndatasize())
				}
			}
			// Load the returndata and compare it.
			if iszero(eq(mload(m), shl(224, onERC721ReceivedSelector))) {
				mstore(0x00, 0xd1a57ed6) // `TransferToNonERC721ReceiverImplementer()`.
				revert(0x1c, 0x04)
			}
		}
	}
}

// File: https://github.com/Vectorized/dn404/blob/main/src/DN404.sol


pragma solidity ^0.8.4;

/// @title DN404
/// @notice DN404 is a hybrid ERC20 and ERC721 implementation that mints
/// and burns NFTs based on an account's ERC20 token balance.
///
/// @author vectorized.eth (@optimizoor)
/// @author Quit (@0xQuit)
/// @author Michael Amadi (@AmadiMichaels)
/// @author cygaar (@0xCygaar)
/// @author Thomas (@0xjustadev)
/// @author Harrison (@PopPunkOnChain)
///
/// @dev Note:
/// - The ERC721 data is stored in this base DN404 contract, however a
///   DN404Mirror contract ***MUST*** be deployed and linked during
///   initialization.
abstract contract DN404 {
	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                           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 Emitted when `target` sets their skipNFT flag to `status`.
	event SkipNFTSet(address indexed target, bool status);

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                        CUSTOM ERRORS                       */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Thrown when attempting to double-initialize the contract.
	error DNAlreadyInitialized();

	/// @dev Thrown when attempting to transfer or burn more tokens than sender's balance.
	error InsufficientBalance();

	/// @dev Thrown when a spender attempts to transfer tokens with an insufficient allowance.
	error InsufficientAllowance();

	/// @dev Thrown when minting an amount of tokens that would overflow the max tokens.
	error TotalSupplyOverflow();

	/// @dev Thrown when the caller for a fallback NFT function is not the mirror contract.
	error SenderNotMirror();

	/// @dev Thrown when attempting to transfer tokens to the zero address.
	error TransferToZeroAddress();

	/// @dev Thrown when the mirror address provided for initialization is the zero address.
	error MirrorAddressIsZero();

	/// @dev Thrown when the link call to the mirror contract reverts.
	error LinkMirrorContractFailed();

	/// @dev Thrown when setting an NFT token approval
	/// and the caller is not the owner or an approved operator.
	error ApprovalCallerNotOwnerNorApproved();

	/// @dev Thrown when transferring an NFT
	/// and the caller is not the owner or an approved operator.
	error TransferCallerNotOwnerNorApproved();

	/// @dev Thrown when transferring an NFT and the from address is not the current owner.
	error TransferFromIncorrectOwner();

	/// @dev Thrown when checking the owner or approved address for an non-existent NFT.
	error TokenDoesNotExist();

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                         CONSTANTS                          */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Amount of token balance that is equal to one NFT.
	uint256 internal constant _WAD = 10 ** 18;

	/// @dev The maximum token ID allowed for an NFT.
	uint256 internal constant _MAX_TOKEN_ID = 0xffffffff;

	/// @dev The maximum possible token supply.
	uint256 internal constant _MAX_SUPPLY = 10 ** 18 * 0xffffffff - 1;

	/// @dev The flag to denote that the address data is initialized.
	uint8 internal constant _ADDRESS_DATA_INITIALIZED_FLAG = 1 << 0;

	/// @dev The flag to denote that the address should skip NFTs.
	uint8 internal constant _ADDRESS_DATA_SKIP_NFT_FLAG = 1 << 1;

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                          STORAGE                           */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Struct containing an address's token data and settings.
	struct AddressData {
		// Auxiliary data.
		uint88 aux;
		// Flags for `initialized` and `skipNFT`.
		uint8 flags;
		// The alias for the address. Zero means absence of an alias.
		uint32 addressAlias;
		// The number of NFT tokens.
		uint32 ownedLength;
		// The token balance in wei.
		uint96 balance;
	}

	/// @dev A uint32 map in storage.
	struct Uint32Map {
		mapping(uint256 => uint256) map;
	}

	/// @dev Struct containing the base token contract storage.
	struct DN404Storage {
		// Current number of address aliases assigned.
		uint32 numAliases;
		// Next token ID to assign for an NFT mint.
		uint32 nextTokenId;
		// Total supply of minted NFTs.
		uint32 totalNFTSupply;
		// Total supply of tokens.
		uint96 totalSupply;
		// Address of the NFT mirror contract.
		address mirrorERC721;
		// Mapping of a user alias number to their address.
		mapping(uint32 => address) aliasToAddress;
		// Mapping of user operator approvals for NFTs.
		mapping(address => mapping(address => bool)) operatorApprovals;
		// Mapping of NFT token approvals to approved operators.
		mapping(uint256 => address) tokenApprovals;
		// Mapping of user allowances for token spenders.
		mapping(address => mapping(address => uint256)) allowance;
		// Mapping of NFT token IDs owned by an address.
		mapping(address => Uint32Map) owned;
		// Even indices: owner aliases. Odd indices: owned indices.
		Uint32Map oo;
		// Mapping of user account AddressData
		mapping(address => AddressData) addressData;
	}

	/// @dev Returns a storage pointer for DN404Storage.
	function _getDN404Storage() internal pure virtual returns (DN404Storage storage $) {
		/// @solidity memory-safe-assembly
		assembly {
			// `uint72(bytes9(keccak256("DN404_STORAGE")))`.
			$.slot := 0xa20d6e21d0e5255308 // Truncate to 9 bytes to reduce bytecode size.
		}
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                         INITIALIZER                        */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Initializes the DN404 contract with an
	/// `initialTokenSupply`, `initialTokenOwner` and `mirror` NFT contract address.
	function _initializeDN404(
		uint256 initialTokenSupply,
		address initialSupplyOwner,
		address mirror
	) internal virtual {
		DN404Storage storage $ = _getDN404Storage();

		if ($.nextTokenId != 0) revert DNAlreadyInitialized();

		if (mirror == address(0)) revert MirrorAddressIsZero();
		_linkMirrorContract(mirror);

		$.nextTokenId = 1;
		$.mirrorERC721 = mirror;

		if (initialTokenSupply > 0) {
			if (initialSupplyOwner == address(0)) revert TransferToZeroAddress();
			if (initialTokenSupply > _MAX_SUPPLY) revert TotalSupplyOverflow();

			$.totalSupply = uint96(initialTokenSupply);
			AddressData storage initialOwnerAddressData = _addressData(initialSupplyOwner);
			initialOwnerAddressData.balance = uint96(initialTokenSupply);

			emit Transfer(address(0), initialSupplyOwner, initialTokenSupply);

			_setSkipNFT(initialSupplyOwner, true);
		}
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*               METADATA FUNCTIONS TO OVERRIDE               */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @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 Uniform Resource Identifier (URI) for token `id`.
	function tokenURI(uint256 id) public view virtual returns (string memory);

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                      ERC20 OPERATIONS                      */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Returns the decimals places of the token. Always 18.
	function decimals() public pure returns (uint8) {
		return 18;
	}

	/// @dev Returns the amount of tokens in existence.
	function totalSupply() public view virtual returns (uint256) {
		return uint256(_getDN404Storage().totalSupply);
	}

	/// @dev Returns the amount of tokens owned by `owner`.
	function balanceOf(address owner) public view virtual returns (uint256) {
		return _getDN404Storage().addressData[owner].balance;
	}

	/// @dev Returns the amount of tokens that `spender` can spend on behalf of `owner`.
	function allowance(address owner, address spender) public view returns (uint256) {
		return _getDN404Storage().allowance[owner][spender];
	}

	/// @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) {
		DN404Storage storage $ = _getDN404Storage();

		$.allowance[msg.sender][spender] = amount;

		emit Approval(msg.sender, spender, amount);

		return true;
	}

	/// @dev Transfer `amount` tokens from the caller to `to`.
	///
	/// Will burn sender NFTs if balance after transfer is less than
	/// the amount required to support the current NFT balance.
	///
	/// Will mint NFTs to `to` if the recipient's new balance supports
	/// additional NFTs ***AND*** the `to` address's skipNFT flag is
	/// set to false.
	///
	/// Requirements:
	/// - `from` must at least have `amount`.
	///
	/// Emits a {Transfer} event.
	function transfer(address to, uint256 amount) public virtual returns (bool) {
		_transfer(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.
	///
	/// Will burn sender NFTs if balance after transfer is less than
	/// the amount required to support the current NFT balance.
	///
	/// Will mint NFTs to `to` if the recipient's new balance supports
	/// additional NFTs ***AND*** the `to` address's skipNFT flag is
	/// set to false.
	///
	/// 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) {
		DN404Storage storage $ = _getDN404Storage();

		uint256 allowed = $.allowance[from][msg.sender];

		if (allowed != type(uint256).max) {
			if (amount > allowed) revert InsufficientAllowance();
			unchecked {
				$.allowance[from][msg.sender] = allowed - amount;
			}
		}

		_transfer(from, to, amount);

		return true;
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                  INTERNAL MINT FUNCTIONS                   */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Mints `amount` tokens to `to`, increasing the total supply.
	///
	/// Will mint NFTs to `to` if the recipient's new balance supports
	/// additional NFTs ***AND*** the `to` address's skipNFT flag is
	/// set to false.
	///
	/// Emits a {Transfer} event.
	function _mint(address to, uint256 amount) internal virtual {
		if (to == address(0)) revert TransferToZeroAddress();

		DN404Storage storage $ = _getDN404Storage();

		AddressData storage toAddressData = _addressData(to);

		unchecked {
			uint256 currentTokenSupply = uint256($.totalSupply) + amount;
			if (amount > _MAX_SUPPLY || currentTokenSupply > _MAX_SUPPLY) {
				revert TotalSupplyOverflow();
			}
			$.totalSupply = uint96(currentTokenSupply);

			uint256 toBalance = toAddressData.balance + amount;
			toAddressData.balance = uint96(toBalance);

			if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) {
				Uint32Map storage toOwned = $.owned[to];
				uint256 toIndex = toAddressData.ownedLength;
				uint256 toEnd = toBalance / _WAD;
				_PackedLogs memory packedLogs = _packedLogsMalloc(_zeroFloorSub(toEnd, toIndex));

				if (packedLogs.logs.length != 0) {
					uint256 maxNFTId = $.totalSupply / _WAD;
					uint32 toAlias = _registerAndResolveAlias(toAddressData, to);
					uint256 id = $.nextTokenId;
					$.totalNFTSupply += uint32(packedLogs.logs.length);
					toAddressData.ownedLength = uint32(toEnd);
					// Mint loop.
					do {
						while (_get($.oo, _ownershipIndex(id)) != 0) {
							if (++id > maxNFTId) id = 1;
						}
						_set(toOwned, toIndex, uint32(id));
						_setOwnerAliasAndOwnedIndex($.oo, id, toAlias, uint32(toIndex++));
						_packedLogsAppend(packedLogs, to, id, 0);
						if (++id > maxNFTId) id = 1;
					} while (toIndex != toEnd);
					$.nextTokenId = uint32(id);
					_packedLogsSend(packedLogs, $.mirrorERC721);
				}
			}
		}
		emit Transfer(address(0), to, amount);
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                  INTERNAL BURN FUNCTIONS                   */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Burns `amount` tokens from `from`, reducing the total supply.
	///
	/// Will burn sender NFTs if balance after transfer is less than
	/// the amount required to support the current NFT balance.
	///
	/// Emits a {Transfer} event.
	function _burn(address from, uint256 amount) internal virtual {
		DN404Storage storage $ = _getDN404Storage();

		AddressData storage fromAddressData = _addressData(from);

		uint256 fromBalance = fromAddressData.balance;
		if (amount > fromBalance) revert InsufficientBalance();

		uint256 currentTokenSupply = $.totalSupply;

		unchecked {
			fromBalance -= amount;
			fromAddressData.balance = uint96(fromBalance);
			currentTokenSupply -= amount;
			$.totalSupply = uint96(currentTokenSupply);

			Uint32Map storage fromOwned = $.owned[from];
			uint256 fromIndex = fromAddressData.ownedLength;
			uint256 nftAmountToBurn = _zeroFloorSub(fromIndex, fromBalance / _WAD);

			if (nftAmountToBurn != 0) {
				$.totalNFTSupply -= uint32(nftAmountToBurn);

				_PackedLogs memory packedLogs = _packedLogsMalloc(nftAmountToBurn);

				uint256 fromEnd = fromIndex - nftAmountToBurn;
				// Burn loop.
				do {
					uint256 id = _get(fromOwned, --fromIndex);
					_setOwnerAliasAndOwnedIndex($.oo, id, 0, 0);
					delete $.tokenApprovals[id];
					_packedLogsAppend(packedLogs, from, id, 1);
				} while (fromIndex != fromEnd);

				fromAddressData.ownedLength = uint32(fromIndex);
				_packedLogsSend(packedLogs, $.mirrorERC721);
			}
		}
		emit Transfer(from, address(0), amount);
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                INTERNAL TRANSFER FUNCTIONS                 */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Moves `amount` of tokens from `from` to `to`.
	///
	/// Will burn sender NFTs if balance after transfer is less than
	/// the amount required to support the current NFT balance.
	///
	/// Will mint NFTs to `to` if the recipient's new balance supports
	/// additional NFTs ***AND*** the `to` address's skipNFT flag is
	/// set to false.
	///
	/// Emits a {Transfer} event.
	function _transfer(address from, address to, uint256 amount) internal virtual {
		if (to == address(0)) revert TransferToZeroAddress();

		DN404Storage storage $ = _getDN404Storage();

		AddressData storage fromAddressData = _addressData(from);
		AddressData storage toAddressData = _addressData(to);

		_TransferTemps memory t;
		t.fromOwnedLength = fromAddressData.ownedLength;
		t.toOwnedLength = toAddressData.ownedLength;
		t.fromBalance = fromAddressData.balance;

		if (amount > t.fromBalance) revert InsufficientBalance();

		unchecked {
			t.fromBalance -= amount;
			fromAddressData.balance = uint96(t.fromBalance);
			toAddressData.balance = uint96(t.toBalance = toAddressData.balance + amount);

			t.nftAmountToBurn = _zeroFloorSub(t.fromOwnedLength, t.fromBalance / _WAD);

			if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) {
				if (from == to) t.toOwnedLength = t.fromOwnedLength - t.nftAmountToBurn;
				t.nftAmountToMint = _zeroFloorSub(t.toBalance / _WAD, t.toOwnedLength);
			}

			_PackedLogs memory packedLogs = _packedLogsMalloc(t.nftAmountToBurn + t.nftAmountToMint);

			if (t.nftAmountToBurn != 0) {
				Uint32Map storage fromOwned = $.owned[from];
				uint256 fromIndex = t.fromOwnedLength;
				uint256 fromEnd = fromIndex - t.nftAmountToBurn;
				$.totalNFTSupply -= uint32(t.nftAmountToBurn);
				fromAddressData.ownedLength = uint32(fromEnd);
				// Burn loop.
				do {
					uint256 id = _get(fromOwned, --fromIndex);
					_setOwnerAliasAndOwnedIndex($.oo, id, 0, 0);
					delete $.tokenApprovals[id];
					_packedLogsAppend(packedLogs, from, id, 1);
				} while (fromIndex != fromEnd);
			}

			if (t.nftAmountToMint != 0) {
				Uint32Map storage toOwned = $.owned[to];
				uint256 toIndex = t.toOwnedLength;
				uint256 toEnd = toIndex + t.nftAmountToMint;
				uint32 toAlias = _registerAndResolveAlias(toAddressData, to);
				uint256 maxNFTId = $.totalSupply / _WAD;
				uint256 id = $.nextTokenId;
				$.totalNFTSupply += uint32(t.nftAmountToMint);
				toAddressData.ownedLength = uint32(toEnd);
				// Mint loop.
				do {
					while (_get($.oo, _ownershipIndex(id)) != 0) {
						if (++id > maxNFTId) id = 1;
					}
					_set(toOwned, toIndex, uint32(id));
					_setOwnerAliasAndOwnedIndex($.oo, id, toAlias, uint32(toIndex++));
					_packedLogsAppend(packedLogs, to, id, 0);
					if (++id > maxNFTId) id = 1;
				} while (toIndex != toEnd);
				$.nextTokenId = uint32(id);
			}

			if (packedLogs.logs.length != 0) {
				_packedLogsSend(packedLogs, $.mirrorERC721);
			}
		}
		emit Transfer(from, to, amount);
	}

	/// @dev Transfers token `id` from `from` to `to`.
	///
	/// Requirements:
	///
	/// - Call must originate from the mirror contract.
	/// - Token `id` must exist.
	/// - `from` must be the owner of the token.
	/// - `to` cannot be the zero address.
	///   `msgSender` must be the owner of the token, or be approved to manage the token.
	///
	/// Emits a {Transfer} event.
	function _transferFromNFT(address from, address to, uint256 id, address msgSender)
		internal
		virtual
	{
		DN404Storage storage $ = _getDN404Storage();

		if (to == address(0)) revert TransferToZeroAddress();

		address owner = $.aliasToAddress[_get($.oo, _ownershipIndex(id))];

		if (from != owner) revert TransferFromIncorrectOwner();

		if (msgSender != from) {
			if (!$.operatorApprovals[from][msgSender]) {
				if (msgSender != $.tokenApprovals[id]) {
					revert TransferCallerNotOwnerNorApproved();
				}
			}
		}

		AddressData storage fromAddressData = _addressData(from);
		AddressData storage toAddressData = _addressData(to);

		fromAddressData.balance -= uint96(_WAD);

		unchecked {
			toAddressData.balance += uint96(_WAD);

			_set($.oo, _ownershipIndex(id), _registerAndResolveAlias(toAddressData, to));
			delete $.tokenApprovals[id];

			uint256 updatedId = _get($.owned[from], --fromAddressData.ownedLength);
			_set($.owned[from], _get($.oo, _ownedIndex(id)), uint32(updatedId));

			uint256 n = toAddressData.ownedLength++;
			_set($.oo, _ownedIndex(updatedId), _get($.oo, _ownedIndex(id)));
			_set($.owned[to], n, uint32(id));
			_set($.oo, _ownedIndex(id), uint32(n));
		}

		emit Transfer(from, to, _WAD);
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                 DATA HITCHHIKING FUNCTIONS                 */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Returns the auxiliary data for `owner`.
	/// Minting, transferring, burning the tokens of `owner` will not change the auxiliary data.
	/// Auxiliary data can be set for any address, even if it does not have any tokens.
	function _getAux(address owner) internal view virtual returns (uint88) {
		return _getDN404Storage().addressData[owner].aux;
	}

	/// @dev Set the auxiliary data for `owner` to `value`.
	/// Minting, transferring, burning the tokens of `owner` will not change the auxiliary data.
	/// Auxiliary data can be set for any address, even if it does not have any tokens.
	function _setAux(address owner, uint88 value) internal virtual {
		_getDN404Storage().addressData[owner].aux = value;
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                     SKIP NFT FUNCTIONS                     */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Returns true if account `a` will skip NFT minting on token mints and transfers.
	/// Returns false if account `a` will mint NFTs on token mints and transfers.
	function getSkipNFT(address a) public view virtual returns (bool) {
		AddressData storage d = _getDN404Storage().addressData[a];
		if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) return _hasCode(a);
		return d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0;
	}

	/// @dev Sets the caller's skipNFT flag to `skipNFT`
	///
	/// Emits a {SkipNFTSet} event.
	function setSkipNFT(bool skipNFT) public virtual {
		_setSkipNFT(msg.sender, skipNFT);
	}

	/// @dev Internal function to set account `a` skipNFT flag to `state`
	///
	/// Initializes account `a` AddressData if it is not currently initialized.
	///
	/// Emits a {SkipNFTSet} event.
	function _setSkipNFT(address a, bool state) internal virtual {
		AddressData storage d = _addressData(a);
		if ((d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0) != state) {
			d.flags ^= _ADDRESS_DATA_SKIP_NFT_FLAG;
		}
		emit SkipNFTSet(a, state);
	}

	/// @dev Returns a storage data pointer for account `a` AddressData
	///
	/// Initializes account `a` AddressData if it is not currently initialized.
	function _addressData(address a) internal virtual returns (AddressData storage d) {
		DN404Storage storage $ = _getDN404Storage();
		d = $.addressData[a];

		if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) {
			uint8 flags = _ADDRESS_DATA_INITIALIZED_FLAG;
			if (_hasCode(a)) flags |= _ADDRESS_DATA_SKIP_NFT_FLAG;
			d.flags = flags;
		}
	}

	/// @dev Returns the `addressAlias` of account `to`.
	///
	/// Assigns and registers the next alias if `to` alias was not previously registered.
	function _registerAndResolveAlias(AddressData storage toAddressData, address to)
		internal
		virtual
		returns (uint32 addressAlias)
	{
		DN404Storage storage $ = _getDN404Storage();
		addressAlias = toAddressData.addressAlias;
		if (addressAlias == 0) {
			addressAlias = ++$.numAliases;
			toAddressData.addressAlias = addressAlias;
			$.aliasToAddress[addressAlias] = to;
		}
	}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                     MIRROR OPERATIONS                      */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Returns the address of the mirror NFT contract.
	function mirrorERC721() public view virtual returns (address) {
		return _getDN404Storage().mirrorERC721;
	}

	/// @dev Returns the total NFT supply.
	function _totalNFTSupply() internal view virtual returns (uint256) {
		return _getDN404Storage().totalNFTSupply;
	}

	/// @dev Returns `owner` NFT balance.
	function _balanceOfNFT(address owner) internal view virtual returns (uint256) {
		return _getDN404Storage().addressData[owner].ownedLength;
	}

	/// @dev Returns the owner of token `id`.
	/// Returns the zero address instead of reverting if the token does not exist.
	function _ownerAt(uint256 id) internal view virtual returns (address) {
		DN404Storage storage $ = _getDN404Storage();
		return $.aliasToAddress[_get($.oo, _ownershipIndex(id))];
	}

	/// @dev Returns the owner of token `id`.
	///
	/// Requirements:
	/// - Token `id` must exist.
	function _ownerOf(uint256 id) internal view virtual returns (address) {
		if (!_exists(id)) revert TokenDoesNotExist();
		return _ownerAt(id);
	}

	/// @dev Returns if token `id` exists.
	function _exists(uint256 id) internal view virtual returns (bool) {
		return _ownerAt(id) != address(0);
	}

	/// @dev Returns the account approved to manage token `id`.
	///
	/// Requirements:
	/// - Token `id` must exist.
	function _getApproved(uint256 id) internal view virtual returns (address) {
		if (!_exists(id)) revert TokenDoesNotExist();
		return _getDN404Storage().tokenApprovals[id];
	}

	/// @dev Sets `spender` as the approved account to manage token `id`, using `msgSender`.
	///
	/// Requirements:
	/// - `msgSender` must be the owner or an approved operator for the token owner.
	function _approveNFT(address spender, uint256 id, address msgSender)
		internal
		virtual
		returns (address)
	{
		DN404Storage storage $ = _getDN404Storage();

		address owner = $.aliasToAddress[_get($.oo, _ownershipIndex(id))];

		if (msgSender != owner) {
			if (!$.operatorApprovals[owner][msgSender]) {
				revert ApprovalCallerNotOwnerNorApproved();
			}
		}

		$.tokenApprovals[id] = spender;

		return owner;
	}

	/// @dev Approve or remove the `operator` as an operator for `msgSender`,
	/// without authorization checks.
	function _setApprovalForAll(address operator, bool approved, address msgSender)
		internal
		virtual
	{
		_getDN404Storage().operatorApprovals[msgSender][operator] = approved;
	}

	/// @dev Calls the mirror contract to link it to this contract.
	///
	/// Reverts if the call to the mirror contract reverts.
	function _linkMirrorContract(address mirror) internal virtual {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x00, 0x0f4599e5) // `linkMirrorContract(address)`.
			mstore(0x20, caller())
			if iszero(and(eq(mload(0x00), 1), call(gas(), mirror, 0, 0x1c, 0x24, 0x00, 0x20))) {
				mstore(0x00, 0xd125259c) // `LinkMirrorContractFailed()`.
				revert(0x1c, 0x04)
			}
		}
	}

	/// @dev Fallback modifier to dispatch calls from the mirror NFT contract
	/// to internal functions in this contract.
	modifier dn404Fallback() virtual {
		DN404Storage storage $ = _getDN404Storage();

		uint256 fnSelector = _calldataload(0x00) >> 224;

		// `isApprovedForAll(address,address)`.
		if (fnSelector == 0xe985e9c5) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x44) revert();

			address owner = address(uint160(_calldataload(0x04)));
			address operator = address(uint160(_calldataload(0x24)));

			_return($.operatorApprovals[owner][operator] ? 1 : 0);
		}
		// `ownerOf(uint256)`.
		if (fnSelector == 0x6352211e) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x24) revert();

			uint256 id = _calldataload(0x04);

			_return(uint160(_ownerOf(id)));
		}
		// `transferFromNFT(address,address,uint256,address)`.
		if (fnSelector == 0xe5eb36c8) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x84) revert();

			address from = address(uint160(_calldataload(0x04)));
			address to = address(uint160(_calldataload(0x24)));
			uint256 id = _calldataload(0x44);
			address msgSender = address(uint160(_calldataload(0x64)));

			_transferFromNFT(from, to, id, msgSender);
			_return(1);
		}
		// `setApprovalForAll(address,bool,address)`.
		if (fnSelector == 0x813500fc) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x64) revert();

			address spender = address(uint160(_calldataload(0x04)));
			bool status = _calldataload(0x24) != 0;
			address msgSender = address(uint160(_calldataload(0x44)));

			_setApprovalForAll(spender, status, msgSender);
			_return(1);
		}
		// `approveNFT(address,uint256,address)`.
		if (fnSelector == 0xd10b6e0c) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x64) revert();

			address spender = address(uint160(_calldataload(0x04)));
			uint256 id = _calldataload(0x24);
			address msgSender = address(uint160(_calldataload(0x44)));

			_return(uint160(_approveNFT(spender, id, msgSender)));
		}
		// `getApproved(uint256)`.
		if (fnSelector == 0x081812fc) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x24) revert();

			uint256 id = _calldataload(0x04);

			_return(uint160(_getApproved(id)));
		}
		// `balanceOfNFT(address)`.
		if (fnSelector == 0xf5b100ea) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x24) revert();

			address owner = address(uint160(_calldataload(0x04)));

			_return(_balanceOfNFT(owner));
		}
		// `totalNFTSupply()`.
		if (fnSelector == 0xe2c79281) {
			if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
			if (msg.data.length < 0x04) revert();

			_return(_totalNFTSupply());
		}
		// `implementsDN404()`.
		if (fnSelector == 0xb7a94eb8) {
			_return(1);
		}
		_;
	}

	/// @dev Fallback function for calls from mirror NFT contract.
	fallback() external payable virtual dn404Fallback {}

	receive() external payable virtual {}

	/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
	/*                      PRIVATE HELPERS                       */
	/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/

	/// @dev Struct containing packed log data for `Transfer` events to be
	/// emitted by the mirror NFT contract.
	struct _PackedLogs {
		uint256[] logs;
		uint256 offset;
	}

	/// @dev Initiates memory allocation for packed logs with `n` log items.
	function _packedLogsMalloc(uint256 n) private pure returns (_PackedLogs memory p) {
		/// @solidity memory-safe-assembly
		assembly {
			let logs := add(mload(0x40), 0x40) // Offset by 2 words for `_packedLogsSend`.
			mstore(logs, n)
			let offset := add(0x20, logs)
			mstore(0x40, add(offset, shl(5, n)))
			mstore(p, logs)
			mstore(add(0x20, p), offset)
		}
	}

	/// @dev Adds a packed log item to `p` with address `a`, token `id` and burn flag `burnBit`.
	function _packedLogsAppend(_PackedLogs memory p, address a, uint256 id, uint256 burnBit)
		private
		pure
	{
		/// @solidity memory-safe-assembly
		assembly {
			let offset := mload(add(0x20, p))
			mstore(offset, or(or(shl(96, a), shl(8, id)), burnBit))
			mstore(add(0x20, p), add(offset, 0x20))
		}
	}

	/// @dev Calls the `mirror` NFT contract to emit Transfer events for packed logs `p`.
	function _packedLogsSend(_PackedLogs memory p, address mirror) private {
		/// @solidity memory-safe-assembly
		assembly {
			let logs := mload(p)
			let o := sub(logs, 0x40) // Start of calldata to send.
			mstore(o, 0x263c69d6) // `logTransfer(uint256[])`.
			mstore(add(o, 0x20), 0x20) // Offset of `logs` in the calldata to send.
			let n := add(0x44, shl(5, mload(logs))) // Length of calldata to send.
			if iszero(and(eq(mload(o), 1), call(gas(), mirror, 0, add(o, 0x1c), n, o, 0x20))) {
				revert(o, 0x00)
			}
		}
	}

	/// @dev Struct of temporary variables for transfers.
	struct _TransferTemps {
		uint256 nftAmountToBurn;
		uint256 nftAmountToMint;
		uint256 fromBalance;
		uint256 toBalance;
		uint256 fromOwnedLength;
		uint256 toOwnedLength;
	}

	/// @dev Returns if `a` has bytecode of non-zero length.
	function _hasCode(address a) private view returns (bool result) {
		/// @solidity memory-safe-assembly
		assembly {
			result := extcodesize(a) // Can handle dirty upper bits.
		}
	}

	/// @dev Returns the calldata value at `offset`.
	function _calldataload(uint256 offset) private pure returns (uint256 value) {
		/// @solidity memory-safe-assembly
		assembly {
			value := calldataload(offset)
		}
	}

	/// @dev Executes a return opcode to return `x` and end the current call frame.
	function _return(uint256 x) private pure {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x00, x)
			return(0x00, 0x20)
		}
	}

	/// @dev Returns `max(0, x - y)`.
	function _zeroFloorSub(uint256 x, uint256 y) private pure returns (uint256 z) {
		/// @solidity memory-safe-assembly
		assembly {
			z := mul(gt(x, y), sub(x, y))
		}
	}

	/// @dev Returns `i << 1`.
	function _ownershipIndex(uint256 i) private pure returns (uint256) {
		return i << 1;
	}

	/// @dev Returns `(i << 1) + 1`.
	function _ownedIndex(uint256 i) private pure returns (uint256) {
		unchecked {
			return (i << 1) + 1;
		}
	}

	/// @dev Returns the uint32 value at `index` in `map`.
	function _get(Uint32Map storage map, uint256 index) private view returns (uint32 result) {
		result = uint32(map.map[index >> 3] >> ((index & 7) << 5));
	}

	/// @dev Updates the uint32 value at `index` in `map`.
	function _set(Uint32Map storage map, uint256 index, uint32 value) private {
		/// @solidity memory-safe-assembly
		assembly {
			mstore(0x20, map.slot)
			mstore(0x00, shr(3, index))
			let s := keccak256(0x00, 0x40) // Storage slot.
			let o := shl(5, and(index, 7)) // Storage slot offset (bits).
			let v := sload(s) // Storage slot value.
			let m := 0xffffffff // Value mask.
			sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), value)))))
		}
	}

	/// @dev Sets the owner alias and the owned index together.
	function _setOwnerAliasAndOwnedIndex(
		Uint32Map storage map,
		uint256 id,
		uint32 ownership,
		uint32 ownedIndex
	) private {
		/// @solidity memory-safe-assembly
		assembly {
			let value := or(shl(32, ownedIndex), and(0xffffffff, ownership))
			mstore(0x20, map.slot)
			mstore(0x00, shr(2, id))
			let s := keccak256(0x00, 0x40) // Storage slot.
			let o := shl(6, and(id, 3)) // Storage slot offset (bits).
			let v := sload(s) // Storage slot value.
			let m := 0xffffffffffffffff // Value mask.
			sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), value)))))
		}
	}
}

// File: contracts/dndblocks.sol


pragma solidity ^0.8.4;






contract DOG404 is DN404, Ownable {
	string private _name;
	string private _symbol;
	string private _baseURI = 'https://ipfs.gateway.fatsale.finance/ipfs/QmdybwW8HJgGhnC46nJKZh2hD6jW46fAdTLQrzyRq7MxoP';

	constructor(
		string memory name_,
		string memory symbol_,
		uint96 initialTokenSupply,
		address initialSupplyOwner
	) {
		_initializeOwner(msg.sender);

		_name = name_;
		_symbol = symbol_;

		address mirror = address(new DN404Mirror(msg.sender));
		_initializeDN404(initialTokenSupply, initialSupplyOwner, mirror);
	}

	function name() public view override returns (string memory) {
		return _name;
	}

	function symbol() public view override returns (string memory) {
		return _symbol;
	}

	function tokenURI(uint256 tokenId) public view override returns (string memory result) {
        tokenId = tokenId;
        return _baseURI;
		// if (bytes(_baseURI).length != 0) {
		// 	uint256 seed = uint256(keccak256(abi.encodePacked(tokenId, address(this))));
		// 	result = string(abi.encodePacked(_baseURI, LibString.toString(seed),".json"));
		// }
	}

	// This allows the owner of the contract to mint more tokens.
	// function mint(address to, uint256 amount) public onlyOwner {
	// 	_mint(to, amount);
	// }

	function setBaseURI(string calldata baseURI_) public onlyOwner {
		_baseURI = baseURI_;
	}

	function withdraw() public onlyOwner {
		SafeTransferLib.safeTransferAllETH(msg.sender);
	}
}

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Contract ABI

[{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"uint96","name":"initialTokenSupply","type":"uint96"},{"internalType":"address","name":"initialSupplyOwner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AlreadyInitialized","type":"error"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"DNAlreadyInitialized","type":"error"},{"inputs":[],"name":"InsufficientAllowance","type":"error"},{"inputs":[],"name":"InsufficientBalance","type":"error"},{"inputs":[],"name":"LinkMirrorContractFailed","type":"error"},{"inputs":[],"name":"MirrorAddressIsZero","type":"error"},{"inputs":[],"name":"NewOwnerIsZeroAddress","type":"error"},{"inputs":[],"name":"NoHandoverRequest","type":"error"},{"inputs":[],"name":"SenderNotMirror","type":"error"},{"inputs":[],"name":"TokenDoesNotExist","type":"error"},{"inputs":[],"name":"TotalSupplyOverflow","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"Unauthorized","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":"pendingOwner","type":"address"}],"name":"OwnershipHandoverCanceled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"pendingOwner","type":"address"}],"name":"OwnershipHandoverRequested","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"target","type":"address"},{"indexed":false,"internalType":"bool","name":"status","type":"bool"}],"name":"SkipNFTSet","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"},{"stateMutability":"payable","type":"fallback"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","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":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"cancelOwnershipHandover","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"pendingOwner","type":"address"}],"name":"completeOwnershipHandover","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"a","type":"address"}],"name":"getSkipNFT","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"mirrorERC721","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"result","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pendingOwner","type":"address"}],"name":"ownershipHandoverExpiresAt","outputs":[{"internalType":"uint256","name":"result","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"requestOwnershipHandover","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"baseURI_","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"skipNFT","type":"bool"}],"name":"setSkipNFT","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"result","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","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"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

Contract Creation Code

Decompile Bytecode Switch to Opcodes View

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

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

-----Decoded View---------------
Arg [0] : name_ (string): 404DOG
Arg [1] : symbol_ (string): 404DOG
Arg [2] : initialTokenSupply (uint96): 1000000000000000000000
Arg [3] : initialSupplyOwner (address): 0x1730519d7A006682E1CD3757D1ba62Ac00f9eFaa

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 00000000000000000000000000000000000000000000003635c9adc5dea00000
Arg [3] : 0000000000000000000000001730519d7a006682e1cd3757d1ba62ac00f9efaa
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [5] : 343034444f470000000000000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [7] : 343034444f470000000000000000000000000000000000000000000000000000

Deployed Bytecode Sourcemap

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ipfs://14132e2dba0057e1e9509430b17f78c07e06c5e3699bd2b2f59ca5ce52d1254f

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