- Contract name:
- Web3Place
- Optimization enabled
- false
- Compiler version
- v0.8.16+commit.07a7930e
- EVM Version
- default
- Verified at
- 2022-10-03T20:54:08.963719Z
Contract source code
// SPDX-License-Identifier: GPL-3.0
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.16;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.16;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: ewtplace.sol
pragma solidity ^0.8.16;
contract Web3Place is Ownable {
uint256 public pixelPrice = 2500000000000000;
struct Pixel {
address owner;
uint8 colour;
}
Pixel[100][100] public pixels;
event PixelColourChanged(uint x, uint y, uint8 color);
event PixelOwnerChanged(uint x, uint y, address owner);
function changePixelPrice(uint _newPixelPrice) public onlyOwner {
pixelPrice = _newPixelPrice;
}
function buyPixel(uint x, uint y) public payable{
Pixel storage pixel = pixels[x][y];
require(msg.value >= pixelPrice);
pixel.owner = msg.sender;
emit PixelOwnerChanged(x, y, pixel.owner);
}
function buyPixels(uint[] memory xcoords, uint[] memory ycoords) public payable{
require(msg.value >= (xcoords.length)*pixelPrice);
for (uint256 i = 0; i < xcoords.length; i++) {
uint xcoord = xcoords[i];
uint ycoord = ycoords[i];
Pixel storage pixel = pixels[xcoord][ycoord];
pixel.owner = msg.sender;
emit PixelOwnerChanged(xcoord, ycoord, pixel.owner);
}
}
function withdraw() public payable onlyOwner {
require(payable(msg.sender).send(address(this).balance));
}
}
Contract ABI
[{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"PixelColourChanged","inputs":[{"type":"uint256","name":"x","internalType":"uint256","indexed":false},{"type":"uint256","name":"y","internalType":"uint256","indexed":false},{"type":"uint8","name":"color","internalType":"uint8","indexed":false}],"anonymous":false},{"type":"event","name":"PixelOwnerChanged","inputs":[{"type":"uint256","name":"x","internalType":"uint256","indexed":false},{"type":"uint256","name":"y","internalType":"uint256","indexed":false},{"type":"address","name":"owner","internalType":"address","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"payable","outputs":[],"name":"buyPixel","inputs":[{"type":"uint256","name":"x","internalType":"uint256"},{"type":"uint256","name":"y","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"buyPixels","inputs":[{"type":"uint256[]","name":"xcoords","internalType":"uint256[]"},{"type":"uint256[]","name":"ycoords","internalType":"uint256[]"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"changePixelPrice","inputs":[{"type":"uint256","name":"_newPixelPrice","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"pixelPrice","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"owner","internalType":"address"},{"type":"uint8","name":"colour","internalType":"uint8"}],"name":"pixels","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"withdraw","inputs":[]}]
Deployed ByteCode
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