Contract Name:
AuctionableERC1155
Contract Source Code:
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "./CreatorsHub/Base.sol";
import "./CreatorsHub/Auctionable.sol";
contract AuctionableERC1155 is
CreatorsHubBase("https://creatorshub.license.rocks/api/public/metaFile/"),
Auctionable
{
constructor() {}
}
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/token/ERC1155/extensions/IERC1155MetadataURI.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../EIP712MetaTransaction.sol";
import "./Ownable.sol";
import "../Strings.sol";
/**
*
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract CreatorsHubBase is
ERC165Storage,
IERC1155,
IERC1155MetadataURI,
EIP712MetaTransaction("ERC1155", "1"),
Ownable
{
using SafeMath for uint256;
using Address for address;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Mapping from account to true / false mint approvals
mapping(address => bool) private _mintApprovals;
// Mapping from account to root operators approvals
mapping(address => bool) internal _rootOperators;
mapping(uint256 => string) private _metaFileUrl;
// Mapping from token ID to proof checksums
mapping(uint256 => string[]) private _proofChecksums;
// Mapping from token ID to secret field
mapping(uint256 => string) private _secretFields;
// Mapping from token ID to fees lock (true/false)
mapping(uint256 => bool) private _feesLock;
// Mapping from token ID to flag (paused = true, active = false)
mapping(uint256 => bool) internal _isPaused;
// Mapping from token ID to amount (reedmable if > 0)
mapping(uint256 => uint256) internal _redeemable;
// Mapping from token ID to array of addresses
mapping(uint256 => address[]) internal _redeemed_by;
struct Listing {
uint256 initialPrice;
uint256 price;
bool biddingEnabled;
uint256 activeTill;
address payable currentBidder;
bool operatorBid;
}
struct Fee {
string name;
address payable recipient;
uint256 value; // 185 basis points = 1.85%
bool percentage;
}
// Mapping from token ID to array of fees (initial sale)
mapping(uint256 => Fee[]) internal _creatorFees;
// Mapping from token ID to array of fees (reselling)
mapping(uint256 => Fee[]) internal _resellerFees;
// Mapping from token ID to account price
mapping(uint256 => mapping(address => Listing)) internal _tokenListings;
function addCreatorFees(uint256 tokenId, Fee[] memory fees) public {
require(_feesLock[tokenId] == false, "Fees locked");
require(
_owners[tokenId] == _msgSender() ||
_rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
for (uint256 i = 0; i < fees.length; i++) {
if (fees[i].percentage == true) {
require(
fees[i].value < 10000,
"Fee must be between 1-10000 basis points"
);
require(
fees[i].value > 0,
"Fee must be between 1-10000 basis points"
);
}
_creatorFees[tokenId].push(fees[i]);
}
}
function addResellerFees(uint256 tokenId, Fee[] memory fees) public {
require(_feesLock[tokenId] == false, "Fees locked");
require(
_owners[tokenId] == _msgSender() ||
_rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
for (uint256 i = 0; i < fees.length; i++) {
_resellerFees[tokenId].push(fees[i]);
}
}
modifier notPaused(uint256 _tokenId) {
require(_isPaused[_tokenId] != true, "Cannot trade paused token");
_;
}
function pauseToken(uint256 tokenId, bool isPausedFlag) public {
require(_rootOperators[_msgSender()] == true, "Must be operator");
_isPaused[tokenId] = isPausedFlag;
}
function lockFees(uint256 tokenId) public {
require(
_owners[tokenId] == _msgSender() ||
_rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
_feesLock[tokenId] = true;
}
function getListing(uint256 tokenId, address seller)
public
view
returns (Listing memory)
{
return _tokenListings[tokenId][seller];
}
function getCreatorFees(uint256 tokenId)
public
view
returns (Fee[] memory)
{
return _creatorFees[tokenId];
}
function getResellerFees(uint256 tokenId)
public
view
returns (Fee[] memory)
{
return _resellerFees[tokenId];
}
function setTokenPrice(
uint256 _tokenId,
uint256 price,
bool biddingEnabled,
uint256 numberOfDays
) public {
require(
_balances[_tokenId][_msgSender()] > 0,
"Caller must own given token"
);
if (_tokenListings[_tokenId][_msgSender()].biddingEnabled) {
require(
_tokenListings[_tokenId][_msgSender()].currentBidder ==
payable(0),
"Auction in progress"
);
}
if (numberOfDays > 0) {
_tokenListings[_tokenId][_msgSender()] = Listing(
price,
price,
biddingEnabled,
block.timestamp + (numberOfDays * 1 days), // active for x days from now
payable(0),
false
);
} else {
_tokenListings[_tokenId][_msgSender()] = Listing(
price,
price,
biddingEnabled,
0, // active for unlimited time
payable(0),
false
);
}
}
function setTokenPriceOperator(
address ownerAddr,
uint256 _tokenId,
uint256 price,
bool biddingEnabled,
uint256 numberOfDays
) public {
require(_rootOperators[_msgSender()] == true, "Must be operator");
require(
_balances[_tokenId][ownerAddr] > 0,
"Owner must own given token"
);
if (_tokenListings[_tokenId][ownerAddr].biddingEnabled) {
require(
_tokenListings[_tokenId][ownerAddr].currentBidder ==
payable(0),
"Auction in progress"
);
}
if (numberOfDays > 0) {
_tokenListings[_tokenId][ownerAddr] = Listing(
price,
price,
biddingEnabled,
block.timestamp + (numberOfDays * 1 days), // active for x days from now
payable(0),
false
);
} else {
_tokenListings[_tokenId][ownerAddr] = Listing(
price,
price,
biddingEnabled,
0, // active for unlimited time
payable(0),
false
);
}
}
function addMetaFileUrl(uint256 id, string memory url) public {
require(
_owners[id] == _msgSender() || _rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
require(bytes(_metaFileUrl[id]).length == 0, "File url already set");
_metaFileUrl[id] = url;
}
function setSecretField(uint256 id, string memory secret) public {
require(
_owners[id] == _msgSender() || _rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
require(bytes(_secretFields[id]).length == 0, "Secret already set");
_secretFields[id] = secret;
}
function getSecretField(uint256 id) public view returns (string memory) {
require(_balances[id][_msgSender()] > 0, "Caller must own given token");
return _secretFields[id];
}
function getMetaFileUrl(uint256 id) public view returns (string memory) {
return _metaFileUrl[id];
}
function addProofChecksums(uint256 id, string[] memory checksums) public {
require(
_owners[id] == _msgSender() || _rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
for (uint256 i = 0; i < checksums.length; i++) {
_proofChecksums[id].push(checksums[i]);
}
}
function getChecksums(uint256 id) public view returns (string[] memory) {
return _proofChecksums[id];
}
function allowRedeem(uint256 tokenId) public {
require(
_owners[tokenId] == _msgSender() || _rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
require(
_redeemable[tokenId] == 0,
"Redeem already allowed"
);
_redeemable[tokenId] = _balances[tokenId][_msgSender()];
}
function redeem(uint256 tokenId, address customerAddr) public {
require(
_owners[tokenId] == _msgSender() || _rootOperators[_msgSender()] == true,
"Must be owner or operator"
);
require(
_redeemed_by[tokenId].length < _redeemable[tokenId],
"Token cannot be redeemed"
);
_redeemed_by[tokenId].push(customerAddr);
}
function redeemedBy(uint256 tokenId) public view returns (address[] memory) {
require(
_redeemable[tokenId] > 0,
"Token cannot be redeemed"
);
return _redeemed_by[tokenId];
}
// Used as the URI for all token types by relying on ID substition, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/*
* bytes4(keccak256('balanceOf(address,uint256)')) == 0x00fdd58e
* bytes4(keccak256('balanceOfBatch(address[],uint256[])')) == 0x4e1273f4
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('safeTransferFrom(address,address,uint256,uint256,bytes)')) == 0xf242432a
* bytes4(keccak256('safeBatchTransferFrom(address,address,uint256[],uint256[],bytes)')) == 0x2eb2c2d6
*
* => 0x00fdd58e ^ 0x4e1273f4 ^ 0xa22cb465 ^
* 0xe985e9c5 ^ 0xf242432a ^ 0x2eb2c2d6 == 0xd9b67a26
*/
bytes4 private constant _INTERFACE_ID_ERC1155 = 0xd9b67a26;
/*
* bytes4(keccak256('uri(uint256)')) == 0x0e89341c
*/
bytes4 private constant _INTERFACE_ID_ERC1155_METADATA_URI = 0x0e89341c;
/**
* @dev See {_setURI}.
*/
event TokenUpgrade(uint256 oldId, uint256 newId);
constructor(string memory tokenUri) {
_setURI(tokenUri);
// register the supported interfaces to conform to ERC1155 via ERC165
_registerInterface(_INTERFACE_ID_ERC1155);
// register the supported interfaces to conform to ERC1155MetadataURI via ERC165
_registerInterface(_INTERFACE_ID_ERC1155_METADATA_URI);
_rootOperators[_msgSender()] = true;
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substituion mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256 tokenId)
external
view
override
returns (string memory)
{
if(bytes(_metaFileUrl[tokenId]).length == 0) {
return string(abi.encodePacked(_uri, Strings.uint2str(tokenId)));
} else {
return _metaFileUrl[tokenId];
}
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id)
public
view
override
returns (uint256)
{
require(
account != address(0),
"ERC1155: balance query for the zero address"
);
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
public
view
override
returns (uint256[] memory)
{
require(
accounts.length == ids.length,
"ERC1155: accounts and ids length mismatch"
);
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
require(
accounts[i] != address(0),
"ERC1155: batch balance query for the zero address"
);
batchBalances[i] = _balances[ids[i]][accounts[i]];
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved)
public
virtual
override
{
require(
_msgSender() != operator,
"ERC1155: setting approval status for self"
);
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator)
public
view
override
returns (bool)
{
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override {
require(to != address(0), "ERC1155: transfer to the zero address");
require(
_rootOperators[_msgSender()] == true,
"Caller is not root operator"
);
address operator = _msgSender();
_beforeTokenTransfer(
operator,
from,
to,
_asSingletonArray(id),
_asSingletonArray(amount),
data
);
_balances[id][from] = _balances[id][from].sub(
amount,
"ERC1155: insufficient balance for transfer"
);
_balances[id][to] = _balances[id][to].add(amount);
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
function transferFrom(
address from,
address to,
uint256 id,
uint256 amount
) internal {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(
operator,
from,
to,
_asSingletonArray(id),
_asSingletonArray(amount),
"0x0"
);
_balances[id][from] = _balances[id][from].sub(
amount,
"ERC1155: insufficient balance for transfer"
);
_balances[id][to] = _balances[id][to].add(amount);
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, "0x0");
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
ids.length == amounts.length,
"ERC1155: ids and amounts length mismatch"
);
require(to != address(0), "ERC1155: transfer to the zero address");
require(
_rootOperators[_msgSender()] == true,
"Caller is not root operator"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
_balances[id][from] = _balances[id][from].sub(
amount,
"ERC1155: insufficient balance for transfer"
);
_balances[id][to] = _balances[id][to].add(amount);
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(
operator,
from,
to,
ids,
amounts,
data
);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substituion mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
function setURI(string memory newuri) internal virtual {
require(_rootOperators[_msgSender()] == true, "Must be operator");
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function mint(
address account,
uint256 id,
uint256 amount,
bytes memory data
) public {
require(account != address(0), "ERC1155: mint to the zero address");
require(
_owners[id] == address(0),
"You are not allowed to mint given id"
);
address caller = _msgSender();
_beforeTokenTransfer(
caller,
address(0),
account,
_asSingletonArray(id),
_asSingletonArray(amount),
data
);
_balances[id][account] = _balances[id][account].add(amount);
_owners[id] = payable(caller);
emit TransferSingle(caller, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(
caller,
address(0),
account,
id,
amount,
data
);
}
function mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public {
require(
_rootOperators[_msgSender()] == true,
"Caller is not root operator"
);
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
_owners[ids[i]] = payable(to);
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `account`
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address account,
uint256 id,
uint256 amount
) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(
operator,
account,
address(0),
_asSingletonArray(id),
_asSingletonArray(amount),
""
);
_balances[id][account] = _balances[id][account].sub(
amount,
"ERC1155: burn amount exceeds balance"
);
emit TransferSingle(operator, account, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(
address account,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
require(
ids.length == amounts.length,
"ERC1155: ids and amounts length mismatch"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][account] = _balances[ids[i]][account].sub(
amounts[i],
"ERC1155: burn amount exceeds balance"
);
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) private {
if (to.isContract()) {
try
IERC1155Receiver(to).onERC1155Received(
operator,
from,
id,
amount,
data
)
returns (bytes4 response) {
if (
response != IERC1155Receiver(to).onERC1155Received.selector
) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) private {
if (to.isContract()) {
try
IERC1155Receiver(to).onERC1155BatchReceived(
operator,
from,
ids,
amounts,
data
)
returns (bytes4 response) {
if (
response !=
IERC1155Receiver(to).onERC1155BatchReceived.selector
) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element)
private
pure
returns (uint256[] memory)
{
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "./Ownable.sol";
import "./Base.sol";
abstract contract Auctionable is Ownable, CreatorsHubBase {
event Bid(
address indexed _bidder,
uint256 indexed _amount,
uint256 indexed _tokenId
);
event AcceptBid(
address indexed _bidder,
address indexed _seller,
uint256 _amount,
uint256 indexed _tokenId
);
event CancelBid(
address indexed _bidder,
uint256 indexed _amount,
uint256 indexed _tokenId
);
event Sold(
address indexed _buyer,
address indexed _seller,
uint256 _amount,
uint256 indexed _tokenId
);
function clearBid(uint256 _tokenId, address seller) private {
_tokenListings[_tokenId][seller].currentBidder = payable(0);
_tokenListings[_tokenId][seller].price = _tokenListings[_tokenId][
seller
]
.initialPrice;
_tokenListings[_tokenId][seller].operatorBid = false;
}
function returnCurrentBid(uint256 _tokenId, address seller) private {
uint256 currentBid = _tokenListings[_tokenId][seller].price;
address payable currentBidder =
_tokenListings[_tokenId][seller].currentBidder;
if (
currentBidder != address(0) &&
!_tokenListings[_tokenId][seller].operatorBid
) {
currentBidder.transfer(currentBid);
}
}
function isGreaterBid(uint256 _tokenId, address seller)
private
view
returns (bool)
{
return msg.value > _tokenListings[_tokenId][seller].price;
}
function bid(uint256 _tokenId, address seller)
public
payable
notPaused(_tokenId)
{
require(
_tokenListings[_tokenId][seller].biddingEnabled,
"Must be auction"
);
require(seller != _msgSender(), "Seller cannot bid");
require(isGreaterBid(_tokenId, seller), "Current bid is higher");
if (_tokenListings[_tokenId][seller].activeTill != 0) {
require(
_tokenListings[_tokenId][seller].activeTill > block.timestamp,
"Listing expired"
);
}
returnCurrentBid(_tokenId, seller);
_tokenListings[_tokenId][seller].currentBidder = payable(_msgSender());
_tokenListings[_tokenId][seller].price = msg.value;
_tokenListings[_tokenId][seller].operatorBid = false;
emit Bid(_msgSender(), msg.value, _tokenId);
}
function operatorBid(
uint256 _tokenId,
address seller,
uint256 price,
address bidder
) public payable notPaused(_tokenId) {
require(_rootOperators[_msgSender()] == true, "Must be operator");
require(
_tokenListings[_tokenId][seller].biddingEnabled,
"Must be auction"
);
require(
price > _tokenListings[_tokenId][seller].price,
"Current bid is higher"
);
if (_tokenListings[_tokenId][seller].activeTill != 0) {
require(
_tokenListings[_tokenId][seller].activeTill > block.timestamp,
"Listing expired"
);
}
returnCurrentBid(_tokenId, seller);
_tokenListings[_tokenId][seller].currentBidder = payable(bidder);
_tokenListings[_tokenId][seller].price = price;
_tokenListings[_tokenId][seller].operatorBid = true;
emit Bid(bidder, price, _tokenId);
}
function operatorCancelBid(uint256 _tokenId, address seller)
public
payable
{
require(_rootOperators[_msgSender()] == true, "Must be operator");
require(
_tokenListings[_tokenId][seller].biddingEnabled,
"Must be auction"
);
require(
_tokenListings[_tokenId][seller].currentBidder != address(0),
"No bid to cancel"
);
address payable bidder = _tokenListings[_tokenId][seller].currentBidder;
uint256 bidAmount = _tokenListings[_tokenId][seller].price;
returnCurrentBid(_tokenId, seller);
clearBid(_tokenId, seller);
emit CancelBid(bidder, bidAmount, _tokenId);
}
function acceptBid(uint256 _tokenId) public notPaused(_tokenId) {
require(
_tokenListings[_tokenId][_msgSender()].biddingEnabled,
"Must be auction"
);
require(
balanceOf(_msgSender(), _tokenId) > 0,
"Seller does not own token anymore"
);
uint256 currentBid = _tokenListings[_tokenId][_msgSender()].price;
address currentBidder =
_tokenListings[_tokenId][_msgSender()].currentBidder;
if (!_tokenListings[_tokenId][_msgSender()].operatorBid) {
payout(_tokenId, _msgSender());
}
transferFrom(_msgSender(), currentBidder, _tokenId, 1);
clearBid(_tokenId, _msgSender());
emit AcceptBid(currentBidder, _msgSender(), currentBid, _tokenId);
}
function payout(uint256 _tokenId, address _seller) private {
uint256 totalPrice = _tokenListings[_tokenId][_seller].price;
uint256 allFees = 0;
if (_seller == _owners[_tokenId]) {
Fee[] memory fees = getCreatorFees(_tokenId);
for (uint256 i = 0; i < fees.length; ++i) {
if (fees[i].percentage) {
uint256 fee = (fees[i].value * totalPrice) / 10000;
allFees += fee;
fees[i].recipient.transfer(fee);
} else {
allFees += fees[i].value;
fees[i].recipient.transfer(fees[i].value);
}
}
} else {
Fee[] memory fees = getResellerFees(_tokenId);
for (uint256 i = 0; i < fees.length; ++i) {
if (fees[i].percentage) {
uint256 fee = (fees[i].value * totalPrice) / 10000;
allFees += fee;
fees[i].recipient.transfer(fee);
} else {
allFees += fees[i].value;
fees[i].recipient.transfer(fees[i].value);
}
}
}
payable(_seller).transfer(totalPrice - allFees);
}
function cancelBid(uint256 _tokenId, address seller) public {
address payable bidder = _tokenListings[_tokenId][seller].currentBidder;
require(
_msgSender() == bidder || _msgSender() == seller,
"You must be last bidder or owner"
);
uint256 bidAmount = _tokenListings[_tokenId][seller].price;
returnCurrentBid(_tokenId, seller);
clearBid(_tokenId, seller);
emit CancelBid(bidder, bidAmount, _tokenId);
}
function buy(uint256 _tokenId, address seller)
public
payable
notOwnerOf(_tokenId)
notPaused(_tokenId)
{
uint256 salePrice = _tokenListings[_tokenId][seller].price;
uint256 sentPrice = msg.value;
address buyer = _msgSender();
require(
balanceOf(seller, _tokenId) > 0,
"Seller does not own token anymore"
);
require(salePrice > 0, "Cannot buy this token");
require(
_tokenListings[_tokenId][seller].biddingEnabled == false,
"Cannot buy, auction in progress"
);
require(sentPrice >= salePrice, "Insufficient value sent");
if (_tokenListings[_tokenId][seller].activeTill != 0) {
require(
_tokenListings[_tokenId][seller].activeTill > block.timestamp,
"Listing expired"
);
}
payout(_tokenId, seller);
clearBid(_tokenId, seller);
transferFrom(seller, buyer, _tokenId, 1);
emit Sold(buyer, seller, sentPrice, _tokenId);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)
pragma solidity ^0.8.0;
import "../IERC1155.sol";
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
) external returns (bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Storage.sol)
pragma solidity ^0.8.0;
import "./ERC165.sol";
/**
* @dev Storage based implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165Storage is ERC165 {
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
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);
}
}
}
}
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./EIP712Base.sol";
contract EIP712MetaTransaction is EIP712Base {
using SafeMath for uint256;
bytes32 private constant META_TRANSACTION_TYPEHASH =
keccak256(
bytes(
"MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
)
);
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) nonces;
/*
* Meta transaction structure.
* No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
* He should call the desired function directly in that case.
*/
struct MetaTransaction {
uint256 nonce;
address from;
bytes functionSignature;
}
constructor(string memory name, string memory version)
public
EIP712Base(name, version)
{}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable returns (bytes memory) {
MetaTransaction memory metaTx =
MetaTransaction({
nonce: nonces[userAddress],
from: userAddress,
functionSignature: functionSignature
});
require(
verify(userAddress, metaTx, sigR, sigS, sigV),
"Signer and signature do not match"
);
// Append userAddress and relayer address at the end to extract it from calling context
(bool success, bytes memory returnData) =
address(this).call(
abi.encodePacked(functionSignature, userAddress)
);
require(success, "Function call not successfull");
nonces[userAddress] = nonces[userAddress].add(1);
emit MetaTransactionExecuted(
userAddress,
payable(msg.sender),
functionSignature
);
return returnData;
}
function hashMetaTransaction(MetaTransaction memory metaTx)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encode(
META_TRANSACTION_TYPEHASH,
metaTx.nonce,
metaTx.from,
keccak256(metaTx.functionSignature)
)
);
}
function getNonce(address user) public view returns (uint256 nonce) {
nonce = nonces[user];
}
function verify(
address signer,
MetaTransaction memory metaTx,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) internal view returns (bool) {
return
signer ==
ecrecover(
toTypedMessageHash(hashMetaTransaction(metaTx)),
sigV,
sigR,
sigS
);
}
function _msgSender() internal view returns (address payable sender) {
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
// Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
} else {
sender = payable(msg.sender);
}
return sender;
}
// To recieve ether in contract
receive() external payable {}
}
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
abstract contract Ownable {
mapping(uint256 => address payable) internal _owners;
function msgSender() private view returns (address payable sender) {
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
// Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
} else {
sender = payable(msg.sender);
}
return sender;
}
modifier notOwnerOf(uint256 _tokenId) {
require(creatorOf(_tokenId) != msgSender());
_;
}
modifier onlyOwnerOf(uint256 _tokenId) {
require(creatorOf(_tokenId) == msgSender());
_;
}
function creatorOf(uint256 _tokenId) public view returns (address payable) {
address payable owner = _owners[_tokenId];
require(owner != address(0));
return owner;
}
}
pragma solidity ^0.8.0;
library Strings {
function uint2str(uint256 _i)
internal
pure
returns (string memory _uintAsString)
{
if (_i == 0) {
return "0";
}
uint256 j = _i;
uint256 len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len;
while (_i != 0) {
k = k - 1;
uint8 temp = (48 + uint8(_i - (_i / 10) * 10));
bytes1 b1 = bytes1(temp);
bstr[k] = b1;
_i /= 10;
}
return string(bstr);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
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;
}
}
pragma solidity ^0.8.0;
contract EIP712Base {
struct EIP712Domain {
string name;
string version;
uint256 chainId;
address verifyingContract;
}
bytes32 internal constant EIP712_DOMAIN_TYPEHASH =
keccak256(
bytes(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
)
);
bytes32 internal domainSeperator;
constructor(string memory name, string memory version) public {
domainSeperator = keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(name)),
keccak256(bytes(version)),
getChainID(),
address(this)
)
);
}
function getChainID() internal view returns (uint256 id) {
assembly {
id := chainid()
}
}
function getDomainSeperator() private view returns (bytes32) {
return domainSeperator;
}
/**
* Accept message hash and returns hash message in EIP712 compatible form
* So that it can be used to recover signer from signature signed using EIP712 formatted data
* https://eips.ethereum.org/EIPS/eip-712
* "\\x19" makes the encoding deterministic
* "\\x01" is the version byte to make it compatible to EIP-191
*/
function toTypedMessageHash(bytes32 messageHash)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
);
}
}