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ERC-20
Add Token to MetaMask (Web3)Overview
Max Total Supply
10,000 YardBoyz
Holders
313
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
2.417039572602087392 YardBoyzValue
$0.00Loading...
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| # | Exchange | Pair | Price | 24H Volume | % Volume |
|---|
Contract Source Code Verified (Exact Match)
Contract Name:
YBOYZ
Compiler Version
v0.8.24+commit.e11b9ed9
Contract Source Code (Solidity)
/**
*Submitted for verification at Etherscan.io on 2024-02-16
*/
/**
Twitter: https://twitter.com/YardBoyzERCYB
Telegram: https://t.me/YardBoyzPortal
Website: https://yardboyz.xyz
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
/// @notice Library for storage of packed unsigned integers.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibMap.sol)
library LibMap {
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* STRUCTS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev A uint8 map in storage.
struct Uint8Map {
mapping(uint256 => uint256) map;
}
/// @dev A uint16 map in storage.
struct Uint16Map {
mapping(uint256 => uint256) map;
}
/// @dev A uint32 map in storage.
struct Uint32Map {
mapping(uint256 => uint256) map;
}
/// @dev A uint40 map in storage. Useful for storing timestamps up to 34841 A.D.
struct Uint40Map {
mapping(uint256 => uint256) map;
}
/// @dev A uint64 map in storage.
struct Uint64Map {
mapping(uint256 => uint256) map;
}
/// @dev A uint128 map in storage.
struct Uint128Map {
mapping(uint256 => uint256) map;
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* GETTERS / SETTERS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev Returns the uint8 value at `index` in `map`.
function get(Uint8Map storage map, uint256 index) internal view returns (uint8 result) {
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, map.slot)
mstore(0x00, shr(5, index))
result := byte(and(31, not(index)), sload(keccak256(0x00, 0x40)))
}
}
/// @dev Updates the uint8 value at `index` in `map`.
function set(Uint8Map storage map, uint256 index, uint8 value) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, map.slot)
mstore(0x00, shr(5, index))
let s := keccak256(0x00, 0x40) // Storage slot.
mstore(0x00, sload(s))
mstore8(and(31, not(index)), value)
sstore(s, mload(0x00))
}
}
/// @dev Returns the uint16 value at `index` in `map`.
function get(Uint16Map storage map, uint256 index) internal view returns (uint16 result) {
result = uint16(map.map[index >> 4] >> ((index & 15) << 4));
}
/// @dev Updates the uint16 value at `index` in `map`.
function set(Uint16Map storage map, uint256 index, uint16 value) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, map.slot)
mstore(0x00, shr(4, index))
let s := keccak256(0x00, 0x40) // Storage slot.
let o := shl(4, and(index, 15)) // Storage slot offset (bits).
let v := sload(s) // Storage slot value.
let m := 0xffff // Value mask.
sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), value)))))
}
}
/// @dev Returns the uint32 value at `index` in `map`.
function get(Uint32Map storage map, uint256 index) internal 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) internal {
/// @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 Returns the uint40 value at `index` in `map`.
function get(Uint40Map storage map, uint256 index) internal view returns (uint40 result) {
unchecked {
result = uint40(map.map[index / 6] >> ((index % 6) * 40));
}
}
/// @dev Updates the uint40 value at `index` in `map`.
function set(Uint40Map storage map, uint256 index, uint40 value) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, map.slot)
mstore(0x00, div(index, 6))
let s := keccak256(0x00, 0x40) // Storage slot.
let o := mul(40, mod(index, 6)) // Storage slot offset (bits).
let v := sload(s) // Storage slot value.
let m := 0xffffffffff // Value mask.
sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), value)))))
}
}
/// @dev Returns the uint64 value at `index` in `map`.
function get(Uint64Map storage map, uint256 index) internal view returns (uint64 result) {
result = uint64(map.map[index >> 2] >> ((index & 3) << 6));
}
/// @dev Updates the uint64 value at `index` in `map`.
function set(Uint64Map storage map, uint256 index, uint64 value) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, map.slot)
mstore(0x00, shr(2, index))
let s := keccak256(0x00, 0x40) // Storage slot.
let o := shl(6, and(index, 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)))))
}
}
/// @dev Returns the uint128 value at `index` in `map`.
function get(Uint128Map storage map, uint256 index) internal view returns (uint128 result) {
result = uint128(map.map[index >> 1] >> ((index & 1) << 7));
}
/// @dev Updates the uint128 value at `index` in `map`.
function set(Uint128Map storage map, uint256 index, uint128 value) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, map.slot)
mstore(0x00, shr(1, index))
let s := keccak256(0x00, 0x40) // Storage slot.
let o := shl(7, and(index, 1)) // Storage slot offset (bits).
let v := sload(s) // Storage slot value.
let m := 0xffffffffffffffffffffffffffffffff // Value mask.
sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), value)))))
}
}
/// @dev Returns the value at `index` in `map`.
function get(mapping(uint256 => uint256) storage map, uint256 index, uint256 bitWidth)
internal
view
returns (uint256 result)
{
unchecked {
uint256 d = _rawDiv(256, bitWidth); // Bucket size.
uint256 m = (1 << bitWidth) - 1; // Value mask.
result = (map[_rawDiv(index, d)] >> (_rawMod(index, d) * bitWidth)) & m;
}
}
/// @dev Updates the value at `index` in `map`.
function set(
mapping(uint256 => uint256) storage map,
uint256 index,
uint256 value,
uint256 bitWidth
) internal {
unchecked {
uint256 d = _rawDiv(256, bitWidth); // Bucket size.
uint256 m = (1 << bitWidth) - 1; // Value mask.
uint256 o = _rawMod(index, d) * bitWidth; // Storage slot offset (bits).
map[_rawDiv(index, d)] ^= (((map[_rawDiv(index, d)] >> o) ^ value) & m) << o;
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* BINARY SEARCH */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
// The following functions search in the range of [`start`, `end`)
// (i.e. `start <= index < end`).
// The range must be sorted in ascending order.
// `index` precedence: equal to > nearest before > nearest after.
// An invalid search range will simply return `(found = false, index = start)`.
/// @dev Returns whether `map` contains `needle`, and the index of `needle`.
function searchSorted(Uint8Map storage map, uint8 needle, uint256 start, uint256 end)
internal
view
returns (bool found, uint256 index)
{
return searchSorted(map.map, needle, start, end, 8);
}
/// @dev Returns whether `map` contains `needle`, and the index of `needle`.
function searchSorted(Uint16Map storage map, uint16 needle, uint256 start, uint256 end)
internal
view
returns (bool found, uint256 index)
{
return searchSorted(map.map, needle, start, end, 16);
}
/// @dev Returns whether `map` contains `needle`, and the index of `needle`.
function searchSorted(Uint32Map storage map, uint32 needle, uint256 start, uint256 end)
internal
view
returns (bool found, uint256 index)
{
return searchSorted(map.map, needle, start, end, 32);
}
/// @dev Returns whether `map` contains `needle`, and the index of `needle`.
function searchSorted(Uint40Map storage map, uint40 needle, uint256 start, uint256 end)
internal
view
returns (bool found, uint256 index)
{
return searchSorted(map.map, needle, start, end, 40);
}
/// @dev Returns whether `map` contains `needle`, and the index of `needle`.
function searchSorted(Uint64Map storage map, uint64 needle, uint256 start, uint256 end)
internal
view
returns (bool found, uint256 index)
{
return searchSorted(map.map, needle, start, end, 64);
}
/// @dev Returns whether `map` contains `needle`, and the index of `needle`.
function searchSorted(Uint128Map storage map, uint128 needle, uint256 start, uint256 end)
internal
view
returns (bool found, uint256 index)
{
return searchSorted(map.map, needle, start, end, 128);
}
/// @dev Returns whether `map` contains `needle`, and the index of `needle`.
function searchSorted(
mapping(uint256 => uint256) storage map,
uint256 needle,
uint256 start,
uint256 end,
uint256 bitWidth
) internal view returns (bool found, uint256 index) {
unchecked {
if (start >= end) end = start;
uint256 t;
uint256 o = start - 1; // Offset to derive the actual index.
uint256 l = 1; // Low.
uint256 d = _rawDiv(256, bitWidth); // Bucket size.
uint256 m = (1 << bitWidth) - 1; // Value mask.
uint256 h = end - start; // High.
while (true) {
index = (l & h) + ((l ^ h) >> 1);
if (l > h) break;
t = (map[_rawDiv(index + o, d)] >> (_rawMod(index + o, d) * bitWidth)) & m;
if (t == needle) break;
if (needle <= t) h = index - 1;
else l = index + 1;
}
/// @solidity memory-safe-assembly
assembly {
m := or(iszero(index), iszero(bitWidth))
found := iszero(or(xor(t, needle), m))
index := add(o, xor(index, mul(xor(index, 1), m)))
}
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* PRIVATE HELPERS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev Returns `x / y`, returning 0 if `y` is zero.
function _rawDiv(uint256 x, uint256 y) private pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
z := div(x, y)
}
}
/// @dev Returns `x % y`, returning 0 if `y` is zero.
function _rawMod(uint256 x, uint256 y) private pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
z := mod(x, y)
}
}
}
/// @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 ""&'<>" 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)
}
}
}
/// @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();
_;
}
}
/// @title ERC_YB_NFT
/// @notice ERC_YB_NFT 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 ERC_YB_NFT {
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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 The ownership is transferred from `oldOwner` to `newOwner`.
/// This is for marketplace signaling purposes. This contract has a `pullOwner()`
/// function that will sync the owner from the base contract.
event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);
/// @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;
address owner;
}
/// @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;
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* ERC721 OPERATIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the token collection name from the base DN404 contract.
function name() public view virtual returns (string memory result) {
return _readString(0x06fdde03, 0); // `symbol()`.
}
/// @dev Returns the token collection symbol from the base DN404 contract.
function symbol() public view virtual returns (string memory result) {
return _readString(0x95d89b41, 0); // `symbol()`.
}
/// @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) {
return _readString(0xc87b56dd, id); // `tokenURI()`.
}
/// @dev Returns the total NFT supply from the base DN404 contract.
function totalSupply() public view virtual returns (uint256 result) {
return _readWord(0xe2c79281, 0, 0); // `totalNFTSupply()`.
}
/// @dev Returns the number of NFT tokens owned by `nftOwner` from the base DN404 contract.
///
/// Requirements:
/// - `nftOwner` must not be the zero address.
function balanceOf(address nftOwner) public view virtual returns (uint256 result) {
return _readWord(0xf5b100ea, uint160(nftOwner), 0); // `balanceOfNFT(address)`.
}
/// @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) {
return address(uint160(_readWord(0x6352211e, id, 0))); // `ownerOf(uint256)`.
}
/// @dev Returns the owner of token `id` from the base DN404 contract.
/// Returns `address(0)` instead of reverting if the token does not exist.
function ownerAt(uint256 id) public view virtual returns (address result) {
return address(uint160(_readWord(0x24359879, id, 0))); // `ownerAt(uint256)`.
}
/// @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) {
return address(uint160(_readWord(0x081812fc, id, 0))); // `getApproved(uint256)`.
}
/// @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.
// The `approved` value is already at 0x40.
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 `nftOwner` from
/// the base DN404 contract.
function isApprovedForAll(address nftOwner, address operator)
public
view
virtual
returns (bool result)
{
// `isApprovedForAll(address,address)`.
return _readWord(0xe985e9c5, uint160(nftOwner), uint160(operator)) != 0;
}
/// @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))
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* OWNER SYNCING OPERATIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the `owner` of the contract, for marketplace signaling purposes.
function owner() public view virtual returns (address) {
return _getDN404NFTStorage().owner;
}
/// @dev Permissionless function to pull the owner from the base DN404 contract
/// if it implements ownable, for marketplace signaling purposes.
function pullOwner() public virtual {
address newOwner;
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, 0x8da5cb5b) // `owner()`.
if and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x20)) {
newOwner := shr(96, mload(0x0c))
}
}
DN404NFTStorage storage $ = _getDN404NFTStorage();
address oldOwner = $.owner;
if (oldOwner != newOwner) {
$.owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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 != $.baseERC20) revert SenderNotBase();
/// @solidity memory-safe-assembly
assembly {
// When returndatacopy copies 1 or more out-of-bounds bytes, it reverts.
returndatacopy(0x00, returndatasize(), lt(calldatasize(), 0x20))
let o := add(0x24, calldataload(0x04)) // Packed logs offset.
returndatacopy(0x00, returndatasize(), lt(calldatasize(), o))
let end := add(o, shl(5, calldataload(sub(o, 0x20))))
returndatacopy(0x00, returndatasize(), lt(calldatasize(), end))
for {} iszero(eq(o, end)) { o := add(0x20, o) } {
let d := calldataload(o) // Entry in the packed logs.
let a := shr(96, d) // The address.
let b := and(1, d) // Whether it is a burn.
log4(
codesize(),
0x00,
_TRANSFER_EVENT_SIGNATURE,
mul(a, b), // `from`.
mul(a, iszero(b)), // `to`.
shr(168, shl(160, d)) // `id`.
)
}
mstore(0x00, 0x01)
return(0x00, 0x20)
}
}
// `linkMirrorContract(address)`.
if (fnSelector == 0x0f4599e5) {
if ($.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 Helper to read a string from the base DN404 contract.
function _readString(uint256 fnSelector, uint256 arg0)
private
view
returns (string memory result)
{
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
result := mload(0x40)
mstore(0x00, fnSelector)
mstore(0x20, arg0)
if iszero(staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x00)) {
returndatacopy(result, 0x00, returndatasize())
revert(result, returndatasize())
}
returndatacopy(0x00, 0x00, 0x20) // Copy the offset of the string in returndata.
returndatacopy(result, mload(0x00), 0x20) // Copy the length of the string.
returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result)) // Copy the string.
mstore(0x40, add(add(result, 0x20), mload(result))) // Allocate memory.
}
}
/// @dev Helper to read a word from the base DN404 contract.
function _readWord(uint256 fnSelector, uint256 arg0, uint256 arg1)
private
view
returns (uint256 result)
{
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
let m := mload(0x40)
mstore(0x00, fnSelector)
mstore(0x20, arg0)
mstore(0x40, arg1)
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 := mload(0x00)
}
}
/// @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)
}
}
}
}
/// @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
/// ERC_YB_NFT contract ***MUST*** be deployed and linked during
/// initialization.
abstract contract ERC_YB {
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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);
/// @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("SkipNFTSet(address,bool)"))`.
uint256 private constant _SKIP_NFT_SET_EVENT_SIGNATURE =
0xb5a1de456fff688115a4f75380060c23c8532d14ff85f687cc871456d6420393;
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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 The unit cannot be zero.
error UnitIsZero();
/// @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 a non-existent NFT.
error TokenDoesNotExist();
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* CONSTANTS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @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;
/// @dev The flag to denote that the address has overridden the default Permit2 allowance.
uint8 internal constant _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG = 1 << 2;
/// @dev The canonical Permit2 address.
/// For signature-based allowance granting for single transaction ERC20 `transferFrom`.
/// To enable, override `_givePermit2DefaultInfiniteAllowance()`.
/// [Github](https://github.com/Uniswap/permit2)
/// [Etherscan](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3)
address internal constant _PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3;
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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 {
uint256 spacer;
}
/// @dev A bitmap in storage.
struct Bitmap {
uint256 spacer;
}
/// @dev A struct to wrap a uint256 in storage.
struct Uint256Ref {
uint256 value;
}
/// @dev A mapping of an address pair to a Uint256Ref.
struct AddressPairToUint256RefMap {
uint256 spacer;
}
/// @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 number of IDs in the burned pool.
uint32 burnedPoolSize;
// 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.
AddressPairToUint256RefMap operatorApprovals;
// Mapping of NFT token approvals to approved operators.
mapping(uint256 => address) nftApprovals;
// Bitmap of whether an non-zero NFT approval may exist.
Bitmap mayHaveNFTApproval;
// Mapping of user allowances for token spenders.
AddressPairToUint256RefMap allowance;
// Mapping of NFT IDs owned by an address.
mapping(address => Uint32Map) owned;
// The pool of burned NFT IDs.
Uint32Map burnedPool;
// 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();
/// @solidity memory-safe-assembly
assembly {
// Make the call to link the mirror contract.
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)
}
}
$.nextTokenId = 1;
$.mirrorERC721 = mirror;
if (_unit() == 0) revert UnitIsZero();
if (initialTokenSupply != 0) {
if (initialSupplyOwner == address(0)) revert TransferToZeroAddress();
if (_totalSupplyOverflows(initialTokenSupply)) revert TotalSupplyOverflow();
$.totalSupply = uint96(initialTokenSupply);
AddressData storage initialOwnerAddressData = _addressData(initialSupplyOwner);
initialOwnerAddressData.balance = uint96(initialTokenSupply);
/// @solidity memory-safe-assembly
assembly {
// Emit the {Transfer} event.
mstore(0x00, initialTokenSupply)
log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, 0, shr(96, shl(96, initialSupplyOwner)))
}
_setSkipNFT(initialSupplyOwner, true);
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* BASE UNIT FUNCTION TO OVERRIDE */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Amount of token balance that is equal to one NFT.
function _unit() internal view virtual returns (uint256) {
return 10 ** 18;
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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) {
if (_givePermit2DefaultInfiniteAllowance() && spender == _PERMIT2) {
uint8 flags = _getDN404Storage().addressData[owner].flags;
if (flags & _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG == 0) return type(uint256).max;
}
return _ref(_getDN404Storage().allowance, owner, spender).value;
}
/// @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) {
_approve(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) {
Uint256Ref storage a = _ref(_getDN404Storage().allowance, from, msg.sender);
uint256 allowed = _givePermit2DefaultInfiniteAllowance() && msg.sender == _PERMIT2
&& (_getDN404Storage().addressData[from].flags & _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG) == 0
? type(uint256).max
: a.value;
if (allowed != type(uint256).max) {
if (amount > allowed) revert InsufficientAllowance();
unchecked {
a.value = allowed - amount;
}
}
_transfer(from, to, amount);
return true;
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* PERMIT2 */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Whether Permit2 has infinite allowances by default for all owners.
/// For signature-based allowance granting for single transaction ERC20 `transferFrom`.
/// To enable, override this function to return true.
function _givePermit2DefaultInfiniteAllowance() internal view virtual returns (bool) {
return false;
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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 maxNFTId;
{
uint256 totalSupply_ = uint256($.totalSupply) + amount;
$.totalSupply = uint96(totalSupply_);
uint256 overflows = _toUint(_totalSupplyOverflows(totalSupply_));
if (overflows | _toUint(totalSupply_ < amount) != 0) revert TotalSupplyOverflow();
maxNFTId = totalSupply_ / _unit();
}
uint256 toEnd;
{
uint256 toBalance = uint256(toAddressData.balance) + amount;
toAddressData.balance = uint96(toBalance);
toEnd = toBalance / _unit();
}
if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) {
Uint32Map storage toOwned = $.owned[to];
Uint32Map storage oo = $.oo;
uint256 toIndex = toAddressData.ownedLength;
_PackedLogs memory packedLogs = _packedLogsMalloc(_zeroFloorSub(toEnd, toIndex));
if (packedLogs.logs.length != 0) {
_packedLogsSet(packedLogs, to, 0);
uint256 burnedPoolSize = $.burnedPoolSize;
uint256 nextTokenId = $.nextTokenId;
uint32 toAlias = _registerAndResolveAlias(toAddressData, to);
$.totalNFTSupply += uint32(packedLogs.logs.length);
toAddressData.ownedLength = uint32(toEnd);
// Mint loop.
do {
uint256 id;
if (burnedPoolSize != 0) {
id = _get($.burnedPool, --burnedPoolSize);
} else {
id = nextTokenId;
while (_get(oo, _ownershipIndex(id)) != 0) {
id = _wrapNFTId(id + 1, maxNFTId);
}
nextTokenId = _wrapNFTId(id + 1, maxNFTId);
}
_set(toOwned, toIndex, uint32(id));
_setOwnerAliasAndOwnedIndex(oo, id, toAlias, uint32(toIndex++));
_packedLogsAppend(packedLogs, id);
} while (toIndex != toEnd);
// Leave some spacing between minted batches for better open addressing.
$.nextTokenId = uint32(_wrapNFTId(nextTokenId + 7, maxNFTId));
$.burnedPoolSize = uint32(burnedPoolSize);
_packedLogsSend(packedLogs, $.mirrorERC721);
}
}
}
/// @solidity memory-safe-assembly
assembly {
// Emit the {Transfer} event.
mstore(0x00, amount)
log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, 0, shr(96, shl(96, to)))
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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();
unchecked {
fromAddressData.balance = uint96(fromBalance -= amount);
uint256 totalSupply_ = uint256($.totalSupply) - amount;
$.totalSupply = uint96(totalSupply_);
Uint32Map storage fromOwned = $.owned[from];
uint256 fromIndex = fromAddressData.ownedLength;
uint256 numNFTBurns = _zeroFloorSub(fromIndex, fromBalance / _unit());
if (numNFTBurns != 0) {
_PackedLogs memory packedLogs = _packedLogsMalloc(numNFTBurns);
_packedLogsSet(packedLogs, from, 1);
uint256 totalNFTSupply = uint256($.totalNFTSupply) - numNFTBurns;
$.totalNFTSupply = uint32(totalNFTSupply);
bool addToBurnedPool = _addToBurnedPool(totalNFTSupply, totalSupply_);
Uint32Map storage oo = $.oo;
uint256 fromEnd = fromIndex - numNFTBurns;
fromAddressData.ownedLength = uint32(fromEnd);
uint256 burnedPoolSize = $.burnedPoolSize;
// Burn loop.
do {
uint256 id = _get(fromOwned, --fromIndex);
_setOwnerAliasAndOwnedIndex(oo, id, 0, 0);
_packedLogsAppend(packedLogs, id);
if (addToBurnedPool) {
_set($.burnedPool, burnedPoolSize++, uint32(id));
}
if (_get($.mayHaveNFTApproval, id)) {
_set($.mayHaveNFTApproval, id, false);
delete $.nftApprovals[id];
}
} while (fromIndex != fromEnd);
$.burnedPoolSize = uint32(burnedPoolSize);
_packedLogsSend(packedLogs, $.mirrorERC721);
}
}
/// @solidity memory-safe-assembly
assembly {
// Emit the {Transfer} event.
mstore(0x00, amount)
log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), 0)
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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.totalSupply = $.totalSupply;
if (amount > (t.fromBalance = fromAddressData.balance)) revert InsufficientBalance();
unchecked {
fromAddressData.balance = uint96(t.fromBalance -= amount);
toAddressData.balance = uint96(t.toBalance = uint256(toAddressData.balance) + amount);
t.numNFTBurns = _zeroFloorSub(t.fromOwnedLength, t.fromBalance / _unit());
if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) {
if (from == to) t.toOwnedLength = t.fromOwnedLength - t.numNFTBurns;
t.numNFTMints = _zeroFloorSub(t.toBalance / _unit(), t.toOwnedLength);
}
t.totalNFTSupply = uint256($.totalNFTSupply) + t.numNFTMints - t.numNFTBurns;
$.totalNFTSupply = uint32(t.totalNFTSupply);
_PackedLogs memory packedLogs = _packedLogsMalloc(t.numNFTBurns + t.numNFTMints);
Uint32Map storage oo = $.oo;
uint256 burnedPoolSize = $.burnedPoolSize;
if (t.numNFTBurns != 0) {
_packedLogsSet(packedLogs, from, 1);
bool addToBurnedPool = _addToBurnedPool(t.totalNFTSupply, t.totalSupply);
Uint32Map storage fromOwned = $.owned[from];
uint256 fromIndex = t.fromOwnedLength;
uint256 fromEnd = fromIndex - t.numNFTBurns;
fromAddressData.ownedLength = uint32(fromEnd);
// Burn loop.
do {
uint256 id = _get(fromOwned, --fromIndex);
_setOwnerAliasAndOwnedIndex(oo, id, 0, 0);
_packedLogsAppend(packedLogs, id);
if (addToBurnedPool) {
_set($.burnedPool, burnedPoolSize++, uint32(id));
}
if (_get($.mayHaveNFTApproval, id)) {
_set($.mayHaveNFTApproval, id, false);
delete $.nftApprovals[id];
}
} while (fromIndex != fromEnd);
}
if (t.numNFTMints != 0) {
_packedLogsSet(packedLogs, to, 0);
uint256 nextTokenId = $.nextTokenId;
Uint32Map storage toOwned = $.owned[to];
uint256 toIndex = t.toOwnedLength;
uint256 toEnd = toIndex + t.numNFTMints;
uint32 toAlias = _registerAndResolveAlias(toAddressData, to);
uint256 maxNFTId = t.totalSupply / _unit();
toAddressData.ownedLength = uint32(toEnd);
// Mint loop.
do {
uint256 id;
if (burnedPoolSize != 0) {
id = _get($.burnedPool, --burnedPoolSize);
} else {
id = nextTokenId;
while (_get(oo, _ownershipIndex(id)) != 0) {
id = _wrapNFTId(id + 1, maxNFTId);
}
nextTokenId = _wrapNFTId(id + 1, maxNFTId);
}
_set(toOwned, toIndex, uint32(id));
_setOwnerAliasAndOwnedIndex(oo, id, toAlias, uint32(toIndex++));
_packedLogsAppend(packedLogs, id);
} while (toIndex != toEnd);
// Leave some spacing between minted batches for better open addressing.
$.nextTokenId = uint32(_wrapNFTId(nextTokenId + 7, maxNFTId));
}
if (packedLogs.logs.length != 0) {
$.burnedPoolSize = uint32(burnedPoolSize);
_packedLogsSend(packedLogs, $.mirrorERC721);
}
}
/// @solidity memory-safe-assembly
assembly {
// Emit the {Transfer} event.
mstore(0x00, amount)
// forgefmt: disable-next-item
log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), shr(96, shl(96, to)))
}
}
/// @dev Returns if burns should be added to the burn pool.
function _addToBurnedPool(uint256 totalNFTSupplyAfterBurn, uint256 totalSupplyAfterBurn)
internal
view
virtual
returns (bool)
{
// Add to burned pool if the load factor > 50%, and collection is not small.
uint256 thres = (totalSupplyAfterBurn / _unit()) >> 1;
return _toUint(totalNFTSupplyAfterBurn > thres) & _toUint(thres > 128) != 0;
}
/// @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();
Uint32Map storage oo = $.oo;
if (from != $.aliasToAddress[_get(oo, _ownershipIndex(id))]) {
revert TransferFromIncorrectOwner();
}
if (msgSender != from) {
if (_ref($.operatorApprovals, from, msgSender).value == 0) {
if (msgSender != $.nftApprovals[id]) {
revert TransferCallerNotOwnerNorApproved();
}
}
}
AddressData storage fromAddressData = _addressData(from);
AddressData storage toAddressData = _addressData(to);
uint256 unit = _unit();
unchecked {
{
uint256 fromBalance = fromAddressData.balance;
if (unit > fromBalance) revert InsufficientBalance();
fromAddressData.balance = uint96(fromBalance - unit);
toAddressData.balance += uint96(unit);
}
mapping(address => Uint32Map) storage owned = $.owned;
Uint32Map storage fromOwned = owned[from];
if (_get($.mayHaveNFTApproval, id)) {
_set($.mayHaveNFTApproval, id, false);
delete $.nftApprovals[id];
}
{
uint32 updatedId = _get(fromOwned, --fromAddressData.ownedLength);
uint32 i = _get(oo, _ownedIndex(id));
_set(fromOwned, i, updatedId);
_set(oo, _ownedIndex(updatedId), i);
}
uint32 n = toAddressData.ownedLength++;
_set(owned[to], n, uint32(id));
_setOwnerAliasAndOwnedIndex(oo, id, _registerAndResolveAlias(toAddressData, to), n);
}
/// @solidity memory-safe-assembly
assembly {
// Emit the {Transfer} event.
mstore(0x00, unit)
// forgefmt: disable-next-item
log3(0x00, 0x20, _TRANSFER_EVENT_SIGNATURE, shr(96, shl(96, from)), shr(96, shl(96, to)))
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* INTERNAL APPROVE FUNCTIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Sets `amount` as the allowance of `spender` over the tokens of `owner`.
///
/// Emits a {Approval} event.
function _approve(address owner, address spender, uint256 amount) internal virtual {
if (_givePermit2DefaultInfiniteAllowance() && spender == _PERMIT2) {
_getDN404Storage().addressData[owner].flags |= _ADDRESS_DATA_OVERRIDE_PERMIT2_FLAG;
}
_ref(_getDN404Storage().allowance, owner, spender).value = amount;
/// @solidity memory-safe-assembly
assembly {
// Emit the {Approval} event.
mstore(0x00, amount)
// forgefmt: disable-next-item
log3(0x00, 0x20, _APPROVAL_EVENT_SIGNATURE, shr(96, shl(96, owner)), shr(96, shl(96, spender)))
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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 minting and transferring ERC20s to `owner` will skip minting NFTs.
/// Returns false otherwise.
function getSkipNFT(address owner) public view virtual returns (bool) {
AddressData storage d = _getDN404Storage().addressData[owner];
if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) return _hasCode(owner);
return d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0;
}
/// @dev Sets the caller's skipNFT flag to `skipNFT`. Returns true.
///
/// Emits a {SkipNFTSet} event.
function setSkipNFT(bool skipNFT) public virtual returns (bool) {
_setSkipNFT(msg.sender, skipNFT);
return true;
}
/// @dev Internal function to set account `owner` skipNFT flag to `state`
///
/// Initializes account `owner` AddressData if it is not currently initialized.
///
/// Emits a {SkipNFTSet} event.
function _setSkipNFT(address owner, bool state) internal virtual {
AddressData storage d = _addressData(owner);
if ((d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0) != state) {
d.flags ^= _ADDRESS_DATA_SKIP_NFT_FLAG;
}
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, iszero(iszero(state)))
log2(0x00, 0x20, _SKIP_NFT_SET_EVENT_SIGNATURE, shr(96, shl(96, owner)))
}
}
/// @dev Returns a storage data pointer for account `owner` AddressData
///
/// Initializes account `owner` AddressData if it is not currently initialized.
function _addressData(address owner) internal virtual returns (AddressData storage d) {
d = _getDN404Storage().addressData[owner];
unchecked {
if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) {
uint256 skipNFT = (_toUint(_hasCode(owner)) * _ADDRESS_DATA_SKIP_NFT_FLAG);
d.flags = uint8(skipNFT | _ADDRESS_DATA_INITIALIZED_FLAG);
}
}
}
/// @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) {
unchecked {
addressAlias = ++$.numAliases;
}
toAddressData.addressAlias = addressAlias;
$.aliasToAddress[addressAlias] = to;
if (addressAlias == 0) revert(); // Overflow.
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* 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().nftApprovals[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 owner)
{
DN404Storage storage $ = _getDN404Storage();
owner = $.aliasToAddress[_get($.oo, _ownershipIndex(id))];
if (msgSender != owner) {
if (_ref($.operatorApprovals, owner, msgSender).value == 0) {
revert ApprovalCallerNotOwnerNorApproved();
}
}
$.nftApprovals[id] = spender;
_set($.mayHaveNFTApproval, id, spender != address(0));
}
/// @dev Approve or remove the `operator` as an operator for `msgSender`,
/// without authorization checks.
function _setApprovalForAll(address operator, bool approved, address msgSender)
internal
virtual
{
_ref(_getDN404Storage().operatorApprovals, msgSender, operator).value = _toUint(approved);
}
/// @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;
// `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);
}
// `isApprovedForAll(address,address)`.
if (fnSelector == 0xe985e9c5) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x44) revert();
address owner = address(uint160(_calldataload(0x04)));
address operator = address(uint160(_calldataload(0x24)));
_return(_ref($.operatorApprovals, owner, operator).value);
}
// `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)));
}
// `ownerAt(uint256)`.
if (fnSelector == 0x24359879) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x24) revert();
uint256 id = _calldataload(0x04);
_return(uint160(_ownerAt(id)));
}
// `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 {}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* INTERNAL / PRIVATE HELPERS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns `(i - 1) << 1`.
function _ownershipIndex(uint256 i) internal pure returns (uint256) {
unchecked {
return (i - 1) << 1; // Minus 1 as token IDs start from 1.
}
}
/// @dev Returns `((i - 1) << 1) + 1`.
function _ownedIndex(uint256 i) internal pure returns (uint256) {
unchecked {
return ((i - 1) << 1) + 1; // Minus 1 as token IDs start from 1.
}
}
/// @dev Returns the uint32 value at `index` in `map`.
function _get(Uint32Map storage map, uint256 index) internal view returns (uint32 result) {
/// @solidity memory-safe-assembly
assembly {
let s := add(shl(96, map.slot), shr(3, index)) // Storage slot.
result := and(0xffffffff, shr(shl(5, and(index, 7)), sload(s)))
}
}
/// @dev Updates the uint32 value at `index` in `map`.
function _set(Uint32Map storage map, uint256 index, uint32 value) internal {
/// @solidity memory-safe-assembly
assembly {
let s := add(shl(96, map.slot), shr(3, index)) // 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
) internal {
/// @solidity memory-safe-assembly
assembly {
let i := sub(id, 1) // Index of the uint64 combined value.
let s := add(shl(96, map.slot), shr(2, i)) // Storage slot.
let o := shl(6, and(i, 3)) // Storage slot offset (bits).
let v := sload(s) // Storage slot value.
let m := 0xffffffffffffffff // Value mask.
let combined := or(shl(32, ownedIndex), and(0xffffffff, ownership))
sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), combined)))))
}
}
/// @dev Returns the boolean value of the bit at `index` in `bitmap`.
function _get(Bitmap storage bitmap, uint256 index) internal view returns (bool result) {
/// @solidity memory-safe-assembly
assembly {
let s := add(shl(96, bitmap.slot), shr(8, index)) // Storage slot.
result := and(1, shr(and(0xff, index), sload(s)))
}
}
/// @dev Updates the bit at `index` in `bitmap` to `value`.
function _set(Bitmap storage bitmap, uint256 index, bool value) internal {
/// @solidity memory-safe-assembly
assembly {
let s := add(shl(96, bitmap.slot), shr(8, index)) // Storage slot.
let o := and(0xff, index) // Storage slot offset (bits).
sstore(s, or(and(sload(s), not(shl(o, 1))), shl(o, iszero(iszero(value)))))
}
}
/// @dev Returns a storage reference to the value at (`a0`, `a1`) in `map`.
function _ref(AddressPairToUint256RefMap storage map, address a0, address a1)
internal
pure
returns (Uint256Ref storage ref)
{
/// @solidity memory-safe-assembly
assembly {
mstore(0x28, a1)
mstore(0x14, a0)
mstore(0x00, map.slot)
ref.slot := keccak256(0x00, 0x48)
// Clear the part of the free memory pointer that was overwritten.
mstore(0x28, 0x00)
}
}
/// @dev Wraps the NFT ID.
function _wrapNFTId(uint256 id, uint256 maxNFTId) internal pure returns (uint256 result) {
/// @solidity memory-safe-assembly
assembly {
result := or(mul(iszero(gt(id, maxNFTId)), id), gt(id, maxNFTId))
}
}
/// @dev Returns whether `amount` is a valid `totalSupply`.
function _totalSupplyOverflows(uint256 amount) internal view returns (bool) {
unchecked {
return _toUint(amount > type(uint96).max)
| _toUint(amount / _unit() > type(uint32).max - 1) != 0;
}
}
/// @dev Returns `max(0, x - y)`.
function _zeroFloorSub(uint256 x, uint256 y) internal pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
z := mul(gt(x, y), sub(x, y))
}
}
/// @dev Returns `b ? 1 : 0`.
function _toUint(bool b) internal pure returns (uint256 result) {
/// @solidity memory-safe-assembly
assembly {
result := iszero(iszero(b))
}
}
/// @dev Struct containing packed log data for {Transfer} events to be
/// emitted by the mirror NFT contract.
struct _PackedLogs {
uint256 offset;
uint256 addressAndBit;
uint256[] logs;
}
/// @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 {
// Note that `p` implicitly allocates and advances the free memory pointer by
// 3 words, which we can safely mutate in `_packedLogsSend`.
let logs := mload(0x40)
mstore(logs, n) // Store the length.
let offset := add(0x20, logs) // Skip the word for `p.logs.length`.
mstore(0x40, add(offset, shl(5, n))) // Allocate memory.
mstore(add(0x40, p), logs) // Set `p.logs`.
mstore(p, offset) // Set `p.offset`.
}
}
/// @dev Set the current address and the burn bit.
function _packedLogsSet(_PackedLogs memory p, address a, uint256 burnBit) private pure {
/// @solidity memory-safe-assembly
assembly {
mstore(add(p, 0x20), or(shl(96, a), burnBit)) // Set `p.addressAndBit`.
}
}
/// @dev Adds a packed log item to `p` with token `id`.
function _packedLogsAppend(_PackedLogs memory p, uint256 id) private pure {
/// @solidity memory-safe-assembly
assembly {
let offset := mload(p)
mstore(offset, or(mload(add(p, 0x20)), shl(8, id))) // `p.addressAndBit | (id << 8)`.
mstore(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(add(p, 0x40))
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 numNFTBurns;
uint256 numNFTMints;
uint256 fromBalance;
uint256 toBalance;
uint256 fromOwnedLength;
uint256 toOwnedLength;
uint256 totalSupply;
uint256 totalNFTSupply;
}
/// @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)
}
}
}
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
}
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
contract YBOYZ is ERC_YB, Ownable {
ERC_YB_NFT private _mirror;
using Strings for uint256;
error TransferFailed();
string public baseTokenURI = "https://jvwgtygk3tt6jgfavflntvhahksrk6pqzznp4ehau5yebjg3azja.arweave.net/TWxp4Mrc5-SYoKlW2dTgOqUVefDOWv4Q4KdwQKTbBlI/";
IUniswapV2Router02 public immutable _uniswapV2Router;
address public immutable uniswapV2Pair;
address private deployerWallet;
address private marketingWallet;
address private constant deadAddress = address(0xdead);
bool private swapping;
uint256 public initialNftSupply = 10000;
uint256 public initialTotalSupply = initialNftSupply * 1e18;
// swap fee for ETH at 0.1% supply
uint256 public swapTokensAtAmount = (initialTotalSupply * 5)/1000;
// a single wallet can hold up to 2.5% of the total supply
uint256 public maxWallet = (initialTotalSupply * 25)/1000;
uint256 public maxTransactionAmount = maxWallet;
bool public tradingOpen = false;
bool public swapEnabled = false;
uint256 public buyFee = 0;
uint256 public sellFee = 0;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) private _isExcludedMaxTransactionAmount;
mapping(address => bool) private automatedMarketMakerPairs;
mapping(address => uint256) private _holderLastTransferTimestamp;
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
uint8 private constant _decimals = 18;
// uint256 private constant _totalTokens = 10_000;
uint256 private constant _tokensPerNFT = 1;
string private constant _name = "YBOYZ";
string private constant _symbol = "YardBoyz";
constructor() {
_initializeOwner(msg.sender);
_mirror = new ERC_YB_NFT(owner());
_initializeDN404(initialTotalSupply, msg.sender, address(_mirror));
_setSkipNFT(msg.sender, true);
_setSkipNFT(address (this), true);
// balanceOf(msg.sender) = initialTotalSupply;
// _mintERC20(msg.sender, initialTotalSupply, false);
// sepolia net 0x86dcd3293C53Cf8EFd7303B57beb2a3F671dDE98
_uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
marketingWallet = payable(msg.sender);
deployerWallet = payable(msg.sender);
// exclude router, contract, and dead address from maxTransactionAmount
excludeFromMaxTransaction(address(_uniswapV2Router), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
// exclude deployer and marketing wallet from maxTransactionAmount
excludeFromMaxTransaction(address(msg.sender), true);
excludeFromMaxTransaction(msg.sender, true);
excludeFromMaxTransaction(marketingWallet, true);
// exclude contract and dead address from fees
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
// exclude deployer and marketingWallet from fees
excludeFromFees(address(msg.sender), true);
excludeFromFees(msg.sender, true);
excludeFromFees(marketingWallet, true);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(
address(this),
_uniswapV2Router.WETH()
);
_setSkipNFT(uniswapV2Pair, true);
}
function name() public view override returns (string memory) {
return _name;
}
function symbol() public view override returns (string memory) {
return _symbol;
}
function setTokenURI(string memory _tokenURI) public onlyOwner {
baseTokenURI = _tokenURI;
}
function tokenURI(uint256 id) public view override returns (string memory) {
return string(abi.encodePacked(baseTokenURI, (id % initialNftSupply).toString(), ".json"));
}
// function setWhitelist(address account_, bool value_) external onlyOwner {
// super.setWhitelist(account_, value_);
// }
// receive() external payable {}
function openTrading() external onlyOwner() {
require(!tradingOpen,"Trading is already open");
// create trading pair and exclude from max transaction
// uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
_approve(address(this), address(_uniswapV2Router), type(uint).max);
// _approve(address(this), uniswapV2Pair, type(uint).max);
IERC20(uniswapV2Pair).approve(address(_uniswapV2Router), type(uint).max);
_uniswapV2Router.addLiquidityETH{value: address(this).balance}(
address(this),
balanceOf(address(this)),
0,
0,
owner(),
block.timestamp
);
swapEnabled = true;
tradingOpen = true;
}
function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner {
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
function _transfer(address from, address to, uint256 amount) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
return super._transfer(from, to, 0);
}
if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping) {
// when trading is closed, only allow sending to and from addresses excluded from fees
if (!tradingOpen) {
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active.");
}
// BUYING - apply max transaction limit
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
// SELLING - LP pair is excluded from maxWallet otherwise the liquidity would be extremely limited
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
// excluded from max transaction limit
else if (!_isExcludedMaxTransactionAmount[to]) {
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
// maybe swap contract tokens for eth
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance > swapTokensAtAmount;
if (canSwap && swapEnabled && !swapping && !automatedMarketMakerPairs[from] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
swapping = true;
swapBack();
swapping = false;
}
// don't take fee if we are swapping, or if sender or receiver is excluded from fees
bool takeFee = !swapping && !_isExcludedFromFees[from] && !_isExcludedFromFees[to];
uint256 fees = 0;
if (takeFee) {
// sell (transfer tokens to LP)
if (automatedMarketMakerPairs[to]) {
fees = amount * sellFee / 100;
}
// buy (transfer tokens from LP)
else if(automatedMarketMakerPairs[from]) {
fees = amount * buyFee / 100;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswapV2Router.WETH();
_approve(address(this), address(_uniswapV2Router), tokenAmount);
_uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
marketingWallet,
block.timestamp
);
}
function setLimits(uint256 _maxTransactionAmount, uint256 _maxWallet) external onlyOwner {
maxTransactionAmount = _maxTransactionAmount * (10 ** 18);
maxWallet = _maxWallet * (10 ** 18);
}
function retrieveStuckEth() external {
require(address(this).balance > 0, "Token: no ETH to clear");
require(msg.sender == marketingWallet);
payable(msg.sender).transfer(address(this).balance);
}
function removeStuckToken(address _address) public {
require(msg.sender == marketingWallet);
require(IERC20(_address).balanceOf(address(this)) > 0, "Can't withdraw 0");
IERC20(_address).transfer(msg.sender, IERC20(_address).balanceOf(address(this)));
}
function setSwapTokensAtAmount(uint256 _amount) external {
require(msg.sender == marketingWallet);
swapTokensAtAmount = _amount;
}
function manualSwap(uint256 percent) external {
require(msg.sender == marketingWallet);
uint256 contractBalance = balanceOf(address(this));
uint256 swapAmount = contractBalance * percent / 100;
swapTokensForEth(swapAmount);
}
function setMarketingWallet(address _marketingWallet) external {
require(msg.sender == marketingWallet);
marketingWallet = _marketingWallet;
}
function setFee(uint256 _buyFee, uint256 _sellFee) external onlyOwner {
buyFee = _buyFee;
sellFee = _sellFee;
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
if (contractBalance == 0) {
// nothing to swap
return;
}
uint256 tokensToSwap = contractBalance;
if (tokensToSwap > swapTokensAtAmount) {
tokensToSwap = swapTokensAtAmount;
}
swapTokensForEth(tokensToSwap);
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"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":"TransferFailed","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"Unauthorized","type":"error"},{"inputs":[],"name":"UnitIsZero","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":"account","type":"address"},{"indexed":false,"internalType":"bool","name":"isExcluded","type":"bool"}],"name":"ExcludeFromFees","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":"pair","type":"address"},{"indexed":true,"internalType":"bool","name":"value","type":"bool"}],"name":"SetAutomatedMarketMakerPair","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":[],"name":"_uniswapV2Router","outputs":[{"internalType":"contract IUniswapV2Router02","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"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":"baseTokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"buyFee","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":"account","type":"address"},{"internalType":"bool","name":"excluded","type":"bool"}],"name":"excludeFromFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"updAds","type":"address"},{"internalType":"bool","name":"isEx","type":"bool"}],"name":"excludeFromMaxTransaction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"getSkipNFT","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"initialNftSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"initialTotalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isExcludedFromFees","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"percent","type":"uint256"}],"name":"manualSwap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxTransactionAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxWallet","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"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":"openTrading","outputs":[],"stateMutability":"nonpayable","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":[{"internalType":"address","name":"_address","type":"address"}],"name":"removeStuckToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"requestOwnershipHandover","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"retrieveStuckEth","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sellFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_buyFee","type":"uint256"},{"internalType":"uint256","name":"_sellFee","type":"uint256"}],"name":"setFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxTransactionAmount","type":"uint256"},{"internalType":"uint256","name":"_maxWallet","type":"uint256"}],"name":"setLimits","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_marketingWallet","type":"address"}],"name":"setMarketingWallet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"skipNFT","type":"bool"}],"name":"setSkipNFT","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"setSwapTokensAtAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_tokenURI","type":"string"}],"name":"setTokenURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"swapEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"swapTokensAtAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tradingOpen","outputs":[{"internalType":"bool","name":"","type":"bool"}],"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":"uniswapV2Pair","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]Contract Creation Code
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Swarm Source
ipfs://3dddf96112529cdfe05c6f175c689882e66380e34b6df96ef55f110412660d2e
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