文件 1 的 5:B2OERC1155Buyer.sol
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract B2OERC1155Buyer is Ownable {
IERC1155 private _erc1155Contract;
mapping(uint256 => uint256) private _prices;
uint256 private _pendingWithdrawals;
constructor(address erc1155Addr) {
_erc1155Contract = IERC1155(erc1155Addr);
}
function setPrice(uint256 tokenId, uint256 price) public onlyOwner {
require(price > 0, 'B2OERC1155Buyer: price must be > 0');
_prices[tokenId] = price;
}
function setPriceBatch(uint256[] memory tokenIds, uint256[] memory prices) public onlyOwner {
require(tokenIds.length == prices.length, 'B2OERC1155Buyer: tokensIds and prices length do not match');
for (uint256 i = 0; i < tokenIds.length; i++) {
require(prices[i] > 0, 'B2OERC1155Buyer: price must be > 0');
_prices[tokenIds[i]] = prices[i];
}
}
function getPrice(uint256 tokenId) public view returns(uint256) {
return _prices[tokenId];
}
function buyToken(address to, uint256 tokenId, uint256 amount, bytes memory data) public payable {
require(_prices[tokenId] > 0, 'B2OERC1155Buyer: wrong token id');
require(amount <= 5, "B2OERC1155Buyer: can't buy more than 5 tokens");
require(msg.value >= _prices[tokenId] * amount, "B2OERC1155Buyer: not enough ETH sent");
_erc1155Contract.safeTransferFrom(
owner(),
to,
tokenId,
amount,
data
);
_pendingWithdrawals += msg.value;
}
function buyTokenBatch(address to, uint256[] memory tokenIds, uint256[] memory amounts, bytes memory data) public payable {
require(tokenIds.length == amounts.length, 'B2OERC1155Buyer: tokensIds and amounts length do not match');
uint256 totalAmount = 0;
for (uint256 i = 0; i < tokenIds.length; i++) {
require(_prices[tokenIds[i]] > 0, 'B2OERC1155Buyer: wrong token id');
require(amounts[i] <= 5, "B2OERC1155Buyer: can't buy more than 5 tokens");
totalAmount += _prices[tokenIds[i]] * amounts[i];
}
require(msg.value >= totalAmount, "B2OERC1155Buyer: not enough ETH sent");
_erc1155Contract.safeBatchTransferFrom(
owner(),
to,
tokenIds,
amounts,
data
);
_pendingWithdrawals += msg.value;
}
function withdraw() public onlyOwner {
address payable receiver = payable(msg.sender);
uint amount = _pendingWithdrawals;
_pendingWithdrawals = 0;
receiver.transfer(amount);
}
function availableToWithdraw() public view onlyOwner returns (uint256) {
return _pendingWithdrawals;
}
}
文件 2 的 5:Context.sol
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
文件 3 的 5:IERC1155.sol
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
interface IERC1155 is IERC165 {
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
event URI(string value, uint256 indexed id);
function balanceOf(address account, uint256 id) external view returns (uint256);
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
function setApprovalForAll(address operator, bool approved) external;
function isApprovedForAll(address account, address operator) external view returns (bool);
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
文件 4 的 5:IERC165.sol
pragma solidity ^0.8.0;
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
文件 5 的 5:Ownable.sol
pragma solidity ^0.8.0;
import "../utils/Context.sol";
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_setOwner(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
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);
}
}
{
"compilationTarget": {
"contracts/B2OERC1155Buyer.sol": "B2OERC1155Buyer"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 1000
},
"remappings": []
}
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