Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "./libraries/Utils.sol";
import "./interfaces/IPeopleLand.sol";
import "./interfaces/ITokenSVG.sol";
contract PeopleLand is IPeopleLand, ERC721Enumerable, Ownable {
Land[] private _lands;
// packedXY => tokenId
mapping(uint256 => uint256) private _packedXYToTokenId;
// packedXY => bool
mapping(uint256 => bool) private _packedXYToIsMinted;
// givedAddress => tokenId
mapping(address => uint256) private _gived;
// mintedAddress => mint land tokenids
mapping(address => uint256[]) private _mintLandTokenIds;
// mintedAddress => mint count
mapping(address => uint8) public override mintLandCount;
mapping(address => bool) public override isPeople;
mapping(address => bool) public override isBuilder;
address public override tokenSVGAddress;
uint256 public constant PRICE = 0.66 ether;
address public constant SIGN_MESSAGE_ADDRESS =
0x9d74d0D4bf55bA7E50a0600b7630c36Cab8A2a69;
bool public mintSelfSwitch;
modifier hasGived() {
require(
_lands[_gived[_msgSender()]].isGived &&
_lands[_gived[_msgSender()]].givedAddress == _msgSender(),
"caller is no gived"
);
_;
}
modifier notPeopleReserved(int128 x, int128 y) {
require(
!((-31 < x && x < 31) && (-31 < y && y < 31)),
"land is people reserved"
);
_;
}
modifier notReserved(int128 x, int128 y) {
require(!((-3 < x && x < 3) && (-3 < y && y < 3)), "land is reserved");
_;
}
modifier isReserved(int128 x, int128 y) {
require((-3 < x && x < 3) && (-3 < y && y < 3), "land is not reserved");
_;
}
constructor(
address _owner,
address _startUp,
address _tokenSVG
) ERC721("People's Land", "PEOPLELAND") Ownable() {
transferOwnership(_owner);
tokenSVGAddress = _tokenSVG;
_lands.push(Land(0, 0, "", address(0), _startUp, true, true));
_gived[_startUp] = 0;
_packedXYToIsMinted[0] = true;
_packedXYToTokenId[0] = 0;
_safeMint(_startUp, 0);
isBuilder[_startUp] = true;
emit Mint(0, 0, address(0));
emit GiveTo(0, 0, _startUp);
}
function mintToSelf(
int128 x,
int128 y,
bytes32 messageHash,
uint8 v,
bytes32 r,
bytes32 s
) external override notReserved(x, y) {
require(mintSelfSwitch, "close");
require(_verifyWhitelist(messageHash, v, r, s), "not in whitelist");
require(
_lands[_gived[_msgSender()]].givedAddress != _msgSender(),
"caller is minted or have gived"
);
uint256 _packedXY = packedXY(x, y);
require(!_packedXYToIsMinted[_packedXY], "land is minted");
isPeople[_msgSender()] = true;
_lands.push(Land(x, y, "", address(0), _msgSender(), true, true));
uint256 newTokenId = _lands.length - 1;
_packedXYToIsMinted[_packedXY] = true;
_packedXYToTokenId[_packedXY] = newTokenId;
_gived[_msgSender()] = newTokenId;
_safeMint(_msgSender(), newTokenId);
emit Mint(x, y, address(0));
emit GiveTo(x, y, _msgSender());
}
function mintToBuilderByOwner(
int128 x,
int128 y,
address givedAddress
) external override onlyOwner isReserved(x, y) {
_mintToBuilderByOwner(x, y, givedAddress, "");
}
function mintToBuilderByOwnerWithSlogan(
int128 x,
int128 y,
address givedAddress,
string memory slogan
) external override onlyOwner isReserved(x, y) {
_mintToBuilderByOwner(x, y, givedAddress, slogan);
}
function mint(int128 x, int128 y) external payable override hasGived {
_mint(x, y);
}
function mint2(
int128 x1,
int128 y1,
int128 x2,
int128 y2
) external payable override hasGived {
_mint2(x1, y1, x2, y2);
}
function giveTo(
int128 x,
int128 y,
address givedAddress
) external override hasGived {
_giveTo(x, y, givedAddress, "");
}
function mintAndGiveTo(
int128 x,
int128 y,
address givedAddress
) external payable override hasGived {
_mint(x, y);
_giveTo(x, y, givedAddress, "");
}
function mintAndGiveToWithSlogan(
int128 x,
int128 y,
address givedAddress,
string memory slogan
) external payable override hasGived {
_mint(x, y);
_giveTo(x, y, givedAddress, slogan);
}
function mint2AndGiveTo(
int128 x1,
int128 y1,
address givedAddress1,
int128 x2,
int128 y2,
address givedAddress2
) external payable override hasGived {
_mint2(x1, y1, x2, y2);
_giveTo(x1, y1, givedAddress1, "");
_giveTo(x2, y2, givedAddress2, "");
}
function setSlogan(
int128 x,
int128 y,
string memory slogan
) external override {
uint256 tokenId = getTokenId(x, y);
require(ownerOf(tokenId) == _msgSender(), "land is not belong to caller");
require(bytes(slogan).length < 256, "slogan is too long");
_lands[tokenId].slogan = slogan;
emit SetSlogan(x, y, slogan);
}
function getAllEth() external override onlyOwner {
payable(_msgSender()).transfer(address(this).balance);
}
function getEth(uint256 value) external override onlyOwner {
if (value <= address(this).balance) {
payable(_msgSender()).transfer(value);
}
}
function setTokenSVGAddress(address _attr) external override onlyOwner {
tokenSVGAddress = _attr;
}
function openMintSelfSwitch() external override onlyOwner {
mintSelfSwitch = true;
}
function land(int128 _x, int128 _y)
external
view
override
returns (Land memory _land)
{
uint256 _packedXY = packedXY(_x, _y);
if (_packedXYToIsMinted[_packedXY]) {
uint256 tokenId = _packedXYToTokenId[_packedXY];
Land memory queryLand = _lands[tokenId];
_land = queryLand;
} else {
_land = Land(_x, _y, "", address(0), address(0), false, false);
}
}
function givedLand(address _givedAddress)
external
view
override
returns (bool isGived, Land memory _land)
{
uint256 tokenId = _gived[_givedAddress];
Land memory queryLand = _lands[tokenId];
if (queryLand.givedAddress == _givedAddress) {
isGived = true;
_land = queryLand;
} else {
isGived = false;
_land = Land(0, 0, "", address(0), address(0), false, false);
}
}
function getMintLands(address _mintedAddress)
external
view
override
returns (Land[] memory _mintLands)
{
uint256[] memory tokenIds = _mintLandTokenIds[_mintedAddress];
_mintLands = new Land[](tokenIds.length);
for (uint8 index = 0; index < tokenIds.length; index++) {
_mintLands[index] = _lands[tokenIds[index]];
}
}
function tokenURI(uint256 tokenId)
public
view
override
returns (string memory result)
{
(int128 x, int128 y) = getCoordinates(tokenId);
(bool _ip, bool _ib, ITokenSVG.TokenInfo memory _invite) = getInviteParams(
tokenId
);
ITokenSVG.Meta memory meta = ITokenSVG.Meta(
x,
y,
tokenId,
_lands[tokenId].slogan,
_ip,
_ib,
_invite,
getMintedAndInvitedList(tokenId),
getNeighborsParams(x, y)
);
result = ITokenSVG(tokenSVGAddress).tokenMeta(meta);
}
function getTokenId(int128 x, int128 y)
public
view
override
returns (uint256 tokenId)
{
uint256 _packedXY = packedXY(x, y);
require(_packedXYToIsMinted[_packedXY], "land not minted");
tokenId = _packedXYToTokenId[_packedXY];
}
function packedXY(int128 x, int128 y)
public
pure
override
returns (uint256 _packedXY)
{
bytes32 xx = bytes16(uint128(x));
bytes32 yy = bytes16(uint128(y));
_packedXY = uint256(xx | (yy >> 128));
}
function getCoordinates(uint256 tokenId)
public
view
override
returns (int128 x, int128 y)
{
require(tokenId < _lands.length, "not exists");
x = _lands[tokenId].x;
y = _lands[tokenId].y;
}
function getCoordinatesStrings(int128 x, int128 y)
public
view
override
returns (string memory sx, string memory sy)
{
(sx, sy) = ITokenSVG(tokenSVGAddress).getCoordinatesStrings(x, y);
}
function _mintToBuilderByOwner(
int128 x,
int128 y,
address givedAddress,
string memory slogan
) private {
require(
_lands[_gived[givedAddress]].givedAddress != givedAddress,
"givedAddress is minted or have gived"
);
uint256 _packedXY = packedXY(x, y);
require(!_packedXYToIsMinted[_packedXY], "land is minted");
_lands.push(Land(x, y, "", address(0), givedAddress, true, true));
uint256 newTokenId = _lands.length - 1;
_packedXYToIsMinted[_packedXY] = true;
_packedXYToTokenId[_packedXY] = newTokenId;
_gived[givedAddress] = newTokenId;
_safeMint(givedAddress, newTokenId);
isBuilder[givedAddress] = true;
if (bytes(slogan).length > 0) {
_lands[newTokenId].slogan = slogan;
}
emit Mint(x, y, address(0));
emit GiveTo(x, y, givedAddress);
}
function _giveTo(
int128 x,
int128 y,
address givedAddress,
string memory slogan
) private {
uint256 tokenId = getTokenId(x, y);
require(
_lands[tokenId].mintedAddress == _msgSender(),
"caller didn't minted this land"
);
require(!_lands[tokenId].isGived, "land is gived");
require(
_lands[_gived[givedAddress]].givedAddress != givedAddress,
"givedAddress have gived land"
);
_lands[tokenId].givedAddress = givedAddress;
_lands[tokenId].isGived = true;
_gived[givedAddress] = tokenId;
_safeMint(givedAddress, tokenId);
if (bytes(slogan).length > 0) {
_lands[tokenId].slogan = slogan;
}
emit GiveTo(x, y, givedAddress);
}
function _mint2(
int128 x1,
int128 y1,
int128 x2,
int128 y2
) private {
require(msg.value >= PRICE * 2, "eth too less");
_mintWithoutEth(x1, y1);
_mintWithoutEth(x2, y2);
if (msg.value > PRICE * 2) {
payable(_msgSender()).transfer(msg.value - PRICE * 2);
}
}
function _mint(int128 x, int128 y) private {
require(msg.value >= PRICE, "eth too less");
_mintWithoutEth(x, y);
if (msg.value > PRICE) {
payable(_msgSender()).transfer(msg.value - PRICE);
}
}
function _mintWithoutEth(int128 x, int128 y) private notPeopleReserved(x, y) {
require(mintLandCount[_msgSender()] < 2, "caller is already minted");
uint256 _packedXY = packedXY(x, y);
require(!_packedXYToIsMinted[_packedXY], "land is minted");
_lands.push(Land(x, y, "", _msgSender(), address(0), true, false));
uint256 newTokenId = _lands.length - 1;
_mintLandTokenIds[_msgSender()].push(newTokenId);
mintLandCount[_msgSender()] += 1;
_packedXYToTokenId[_packedXY] = newTokenId;
_packedXYToIsMinted[_packedXY] = true;
emit Mint(x, y, _msgSender());
}
function getNeighborsParams(int128 x, int128 y)
public
view
returns (string[] memory tokenIds)
{
tokenIds = new string[](8);
bool xIsMax = type(int128).max == x;
bool yIsMax = type(int128).max == y;
bool xIsMin = type(int128).min == x;
bool yIsMin = type(int128).min == y;
string memory empty = "";
tokenIds[0] = (xIsMin || yIsMax) ? empty : _getTokenIdStr(x - 1, y + 1);
tokenIds[1] = yIsMax ? empty : _getTokenIdStr(x, y + 1);
tokenIds[2] = (xIsMax || yIsMax) ? empty : _getTokenIdStr(x + 1, y + 1);
tokenIds[3] = xIsMin ? empty : _getTokenIdStr(x - 1, y);
tokenIds[4] = xIsMax ? empty : _getTokenIdStr(x + 1, y);
tokenIds[5] = (xIsMin || yIsMin) ? empty : _getTokenIdStr(x - 1, y - 1);
tokenIds[6] = yIsMin ? empty : _getTokenIdStr(x, y - 1);
tokenIds[7] = xIsMax || yIsMin ? empty : _getTokenIdStr(x + 1, y - 1);
}
function getInviteParams(uint256 tokenId)
public
view
returns (
bool _ip,
bool _ib,
ITokenSVG.TokenInfo memory _invite
)
{
address mintedAddress = _lands[tokenId].mintedAddress;
address givedAddress = _lands[tokenId].givedAddress;
_invite = ITokenSVG.TokenInfo(
_lands[_gived[mintedAddress]].x,
_lands[_gived[mintedAddress]].y,
_gived[mintedAddress],
_lands[_gived[mintedAddress]].isGived
);
_ip = isPeople[givedAddress];
_ib = isBuilder[givedAddress];
}
function getMintedAndInvitedList(uint256 tokenId)
public
view
returns (ITokenSVG.TokenInfo[] memory _list)
{
address _givedAddress = _lands[tokenId].givedAddress;
uint256[] memory tokenIds = _mintLandTokenIds[_givedAddress];
_list = new ITokenSVG.TokenInfo[](tokenIds.length);
if (tokenIds.length != 0) {
for (uint8 i = 0; i < tokenIds.length; i++) {
Land memory qLand = _lands[tokenIds[i]];
if (qLand.isGived) {
_list[i] = ITokenSVG.TokenInfo(
qLand.x,
qLand.y,
tokenIds[i],
qLand.isGived
);
} else {
_list[i] = ITokenSVG.TokenInfo(qLand.x, qLand.y, 0, false);
}
}
}
}
function _getTokenIdStr(int128 x, int128 y)
private
view
returns (string memory _str)
{
uint256 _packedXY = packedXY(x, y);
if (_packedXYToIsMinted[_packedXY]) {
_str = Strings.toString(_packedXYToTokenId[_packedXY]);
}
}
function _verifyWhitelist(
bytes32 messageHash,
uint8 v,
bytes32 r,
bytes32 s
) private view returns (bool pass) {
bytes32 reMessageHash = keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n42",
Utils.toString(_msgSender())
)
);
pass = (ecrecover(messageHash, v, r, s) == SIGN_MESSAGE_ADDRESS &&
reMessageHash == messageHash);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library Utils {
function toString(address account) internal pure returns (string memory) {
return toString(abi.encodePacked(account));
}
function toString(bytes memory data) internal pure returns (string memory) {
bytes memory alphabet = "0123456789abcdef";
bytes memory str = new bytes(2 + data.length * 2);
str[0] = "0";
str[1] = "x";
for (uint256 i = 0; i < data.length; i++) {
str[2 + i * 2] = alphabet[uint256(uint8(data[i] >> 4))];
str[3 + i * 2] = alphabet[uint256(uint8(data[i] & 0x0f))];
}
return string(str);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IPeopleLand {
struct Land {
int128 x;
int128 y;
string slogan;
address mintedAddress;
address givedAddress;
bool isMinted;
bool isGived;
}
event Mint(int128 x, int128 y, address mintedAddress);
event GiveTo(int128 x, int128 y, address givedAddress);
event SetSlogan(int128 x, int128 y, string slogan);
function mintLandCount(address mintedAddress)
external
view
returns (uint8 count);
function isPeople(address addr) external view returns (bool);
function isBuilder(address addr) external view returns (bool);
function tokenSVGAddress() external view returns (address);
function mintToSelf(
int128 x,
int128 y,
bytes32 messageHash,
uint8 v,
bytes32 r,
bytes32 s
) external;
function mintToBuilderByOwner(
int128 x,
int128 y,
address givedAddress
) external;
function mintToBuilderByOwnerWithSlogan(
int128 x,
int128 y,
address givedAddress,
string memory slogan
) external;
function mint(int128 x, int128 y) external payable;
function mint2(
int128 x1,
int128 y1,
int128 x2,
int128 y2
) external payable;
function giveTo(
int128 x,
int128 y,
address givedAddress
) external;
function mintAndGiveTo(
int128 x,
int128 y,
address givedAddress
) external payable;
function mintAndGiveToWithSlogan(
int128 x,
int128 y,
address givedAddress,
string memory slogan
) external payable;
function mint2AndGiveTo(
int128 x1,
int128 y1,
address givedAddress1,
int128 x2,
int128 y2,
address givedAddress2
) external payable;
function setSlogan(
int128 x,
int128 y,
string memory slogan
) external;
function getEth(uint256 value) external;
function getAllEth() external;
function setTokenSVGAddress(address _attr) external;
function openMintSelfSwitch() external;
function land(int128 _x, int128 _y) external view returns (Land memory token);
function givedLand(address _givedAddress)
external
view
returns (bool isGived, Land memory token);
function getMintLands(address _mintedAddress)
external
view
returns (Land[] memory _token);
function getTokenId(int128 x, int128 y)
external
view
returns (uint256 tokenId);
function getCoordinates(uint256 tokenId)
external
view
returns (int128 x, int128 y);
function getCoordinatesStrings(int128 x, int128 y)
external
view
returns (string memory sx, string memory sy);
function packedXY(int128 x, int128 y)
external
pure
returns (uint256 _packedXY);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface ITokenSVG {
struct TokenInfo {
int128 x;
int128 y;
uint256 tokenId;
bool hasTokenId;
}
struct Meta {
int128 x;
int128 y;
uint256 tokenId;
string slogan;
bool isPeople;
bool isBuidler;
TokenInfo invite;
TokenInfo[] mintedAndInvitedList;
string[] neighbors;
}
function getCoordinatesStrings(int128 x, int128 y)
external
pure
returns (string memory sx, string memory sy);
function tokenMeta(Meta memory meta)
external
pure
returns (string memory result);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}