Contract Name:
AuctionHouse
Contract Source Code:
File 1 of 1 : AuctionHouse
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;
pragma experimental ABIEncoderV2;
library SafeMath {
/**
* @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) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @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 sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @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) {
// 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 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts 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) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts 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 mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
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);
}
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;
}
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
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;
// solhint-disable-next-line no-inline-assembly
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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(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");
// solhint-disable-next-line avoid-low-level-calls
(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");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
library Counters {
using SafeMath for uint256;
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
// The {SafeMath} overflow check can be skipped here, see the comment at the top
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
library Math {
using SafeMath for uint256;
// ============ Library Functions ============
/*
* Return target * (numerator / denominator).
*/
function getPartial(
uint256 target,
uint256 numerator,
uint256 denominator
) internal pure returns (uint256) {
return target.mul(numerator).div(denominator);
}
/*
* Return target * (numerator / denominator), but rounded up.
*/
function getPartialRoundUp(
uint256 target,
uint256 numerator,
uint256 denominator
) internal pure returns (uint256) {
if (target == 0 || numerator == 0) {
// SafeMath will check for zero denominator
return SafeMath.div(0, denominator);
}
return target.mul(numerator).sub(1).div(denominator).add(1);
}
function to128(uint256 number) internal pure returns (uint128) {
uint128 result = uint128(number);
require(result == number, "Math: Unsafe cast to uint128");
return result;
}
function to96(uint256 number) internal pure returns (uint96) {
uint96 result = uint96(number);
require(result == number, "Math: Unsafe cast to uint96");
return result;
}
function to32(uint256 number) internal pure returns (uint32) {
uint32 result = uint32(number);
require(result == number, "Math: Unsafe cast to uint32");
return result;
}
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
}
library Decimal {
using SafeMath for uint256;
// ============ Constants ============
uint256 constant BASE_POW = 18;
uint256 constant BASE = 10**BASE_POW;
// ============ Structs ============
struct D256 {
uint256 value;
}
// ============ Functions ============
function one() internal pure returns (D256 memory) {
return D256({value: BASE});
}
function onePlus(D256 memory d) internal pure returns (D256 memory) {
return D256({value: d.value.add(BASE)});
}
function mul(uint256 target, D256 memory d)
internal
pure
returns (uint256)
{
return Math.getPartial(target, d.value, BASE);
}
function div(uint256 target, D256 memory d)
internal
pure
returns (uint256)
{
return Math.getPartial(target, BASE, d.value);
}
}
interface IMarket {
struct Bid {
// Amount of the currency being bid
uint256 amount;
// Address to the ERC20 token being used to bid
address currency;
// Address of the bidder
address bidder;
// Address of the recipient
address recipient;
// % of the next sale to award the current owner
Decimal.D256 sellOnShare;
}
struct Ask {
// Amount of the currency being asked
uint256 amount;
// Address to the ERC20 token being asked
address currency;
}
struct BidShares {
// % of sale value that goes to the _previous_ owner of the nft
Decimal.D256 prevOwner;
// % of sale value that goes to the original creator of the nft
Decimal.D256 creator;
// % of sale value that goes to the seller (current owner) of the nft
Decimal.D256 owner;
}
event BidCreated(uint256 indexed tokenId, Bid bid);
event BidRemoved(uint256 indexed tokenId, Bid bid);
event BidFinalized(uint256 indexed tokenId, Bid bid);
event AskCreated(uint256 indexed tokenId, Ask ask);
event AskRemoved(uint256 indexed tokenId, Ask ask);
event BidShareUpdated(uint256 indexed tokenId, BidShares bidShares);
function bidForTokenBidder(uint256 tokenId, address bidder)
external
view
returns (Bid memory);
function currentAskForToken(uint256 tokenId)
external
view
returns (Ask memory);
function bidSharesForToken(uint256 tokenId)
external
view
returns (BidShares memory);
function isValidBid(uint256 tokenId, uint256 bidAmount)
external
view
returns (bool);
function isValidBidShares(BidShares calldata bidShares)
external
pure
returns (bool);
function splitShare(Decimal.D256 calldata sharePercentage, uint256 amount)
external
pure
returns (uint256);
function configure(address mediaContractAddress) external;
function setBidShares(uint256 tokenId, BidShares calldata bidShares)
external;
function setAsk(uint256 tokenId, Ask calldata ask) external;
function removeAsk(uint256 tokenId) external;
function setBid(
uint256 tokenId,
Bid calldata bid,
address spender
) external;
function removeBid(uint256 tokenId, address bidder) external;
function acceptBid(uint256 tokenId, Bid calldata expectedBid) external;
}
interface IMedia {
struct EIP712Signature {
uint256 deadline;
uint8 v;
bytes32 r;
bytes32 s;
}
struct MediaData {
// A valid URI of the content represented by this token
string tokenURI;
// A valid URI of the metadata associated with this token
string metadataURI;
// A SHA256 hash of the content pointed to by tokenURI
bytes32 contentHash;
// A SHA256 hash of the content pointed to by metadataURI
bytes32 metadataHash;
}
event TokenURIUpdated(uint256 indexed _tokenId, address owner, string _uri);
event TokenMetadataURIUpdated(
uint256 indexed _tokenId,
address owner,
string _uri
);
/**
* @notice Return the metadata URI for a piece of media given the token URI
*/
function tokenMetadataURI(uint256 tokenId)
external
view
returns (string memory);
/**
* @notice Mint new media for msg.sender.
*/
function mint(MediaData calldata data, IMarket.BidShares calldata bidShares)
external;
/**
* @notice EIP-712 mintWithSig method. Mints new media for a creator given a valid signature.
*/
function mintWithSig(
address creator,
MediaData calldata data,
IMarket.BidShares calldata bidShares,
EIP712Signature calldata sig
) external;
/**
* @notice Transfer the token with the given ID to a given address.
* Save the previous owner before the transfer, in case there is a sell-on fee.
* @dev This can only be called by the auction contract specified at deployment
*/
function auctionTransfer(uint256 tokenId, address recipient) external;
/**
* @notice Set the ask on a piece of media
*/
function setAsk(uint256 tokenId, IMarket.Ask calldata ask) external;
/**
* @notice Remove the ask on a piece of media
*/
function removeAsk(uint256 tokenId) external;
/**
* @notice Set the bid on a piece of media
*/
function setBid(uint256 tokenId, IMarket.Bid calldata bid) external;
/**
* @notice Remove the bid on a piece of media
*/
function removeBid(uint256 tokenId) external;
function getTreasurerAddress() external view returns(address);
function owner() external view returns(address);
function authorize(address _address) external view returns(bool);
function acceptBid(uint256 tokenId, IMarket.Bid calldata bid) external;
/**
* @notice Revoke approval for a piece of media
*/
function revokeApproval(uint256 tokenId) external;
/**
* @notice Update the token URI
*/
function updateTokenURI(uint256 tokenId, string calldata tokenURI) external;
/**
* @notice Update the token metadata uri
*/
function updateTokenMetadataURI(
uint256 tokenId,
string calldata metadataURI
) external;
/**
* @notice EIP-712 permit method. Sets an approved spender given a valid signature.
*/
function permit(
address spender,
uint256 tokenId,
EIP712Signature calldata sig
) external;
}
interface IWETH {
function deposit() external payable;
function withdraw(uint wad) external;
function transfer(address to, uint256 value) external returns (bool);
}
interface IMediaExtended is IMedia {
function marketContract() external returns(address);
}
interface IAuctionHouse {
struct Auction {
// ID for the ERC721 token
uint256 tokenId;
// Address for the ERC721 contract
address tokenContract;
// Whether or not the auction curator has approved the auction to start
bool approved;
// The current highest bid amount
uint256 amount;
// The length of time to run the auction for, after the first bid was made
uint256 duration;
// The time of the first bid
uint256 firstBidTime;
// The minimum price of the first bid
uint256 reservePrice;
// The sale percentage to send to the curator
uint8 curatorFeePercentage;
// The address that should receive the funds once the NFT is sold.
address tokenOwner;
// The address of the current highest bid
address payable bidder;
// The address of the auction's curator.
// The curator can reject or approve an auction
address payable curator;
// The address of the ERC-20 currency to run the auction with.
// If set to 0x0, the auction will be run in ETH
address auctionCurrency;
uint256 startTime;
}
event AuctionCreated(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
uint256 duration,
uint256 reservePrice,
address tokenOwner,
address curator,
uint8 curatorFeePercentage,
address auctionCurrency,
uint256 startTime
);
event AuctionApprovalUpdated(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
bool approved
);
event AuctionReservePriceUpdated(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
uint256 reservePrice
);
event RescheduleAuctionTime(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
uint256 newStartTime
);
event AuctionBid(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
address sender,
uint256 value,
bool firstBid,
bool extended
);
event AuctionDurationExtended(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
uint256 duration
);
event AuctionEnded(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
address tokenOwner,
address curator,
address winner,
uint256 amount,
uint256 curatorFee,
address auctionCurrency
);
event AuctionCanceled(
uint256 indexed auctionId,
uint256 indexed tokenId,
address indexed tokenContract,
address tokenOwner
);
function createAuction(
uint256 tokenId,
address tokenContract,
uint256 duration,
uint256 reservePrice,
address payable curator,
uint8 curatorFeePercentages,
address auctionCurrency,
uint256 startTime
) external returns (uint256);
function setAuctionApproval(uint256 auctionId, bool approved) external;
function setAuctionReservePrice(uint256 auctionId, uint256 reservePrice) external;
function rescheduleAuctionTime(uint256 auctionId, uint256 newStartTime) external;
function createBid(uint256 auctionId, uint256 amount) external payable;
function endAuction(uint256 auctionId) external;
function cancelAuction(uint256 auctionId) external;
}
contract AuctionHouse is IAuctionHouse, ReentrancyGuard {
using SafeMath for uint256;
using SafeERC20 for IERC20;
using Counters for Counters.Counter;
// The minimum amount of time left in an auction after a new bid is created
uint256 public timeBuffer;
// The minimum wei difference between the last bid amount and the current bid.
uint256 public minBidIncrementWei;
// The address of the media protocol to use via this contract
address public media;
// / The address of the WETH contract, so that any ETH transferred can be handled as an ERC-20
address public wethAddress;
// A mapping of all of the auctions currently running.
mapping(uint256 => IAuctionHouse.Auction) public auctions;
bytes4 constant interfaceId = 0x80ac58cd; // 721 interface id
Counters.Counter private _auctionIdTracker;
/**
* @notice Require that the specified auction exists
*/
modifier auctionExists(uint256 auctionId) {
require(_exists(auctionId), "Auction doesn't exist");
_;
}
/*
* Constructor
*/
constructor(address _media, address _weth) public {
require(
IERC165(_media).supportsInterface(interfaceId),
"Doesn't support NFT interface"
);
media = _media;
wethAddress = _weth;
timeBuffer = 600; // extend 10 minutes after every bid made in last 10 minutes
minBidIncrementWei = 10000000000000000; // 0.01 eth
}
function setBufferTime(uint256 _timebuffer) public {
require (msg.sender == IMedia(media).owner(),"You are not a Superadmin" );
require (_timebuffer > 0,"must be greater than Zero");
timeBuffer = _timebuffer;
}
/**
* @notice Create an auction.
* @dev Store the auction details in the auctions mapping and emit an AuctionCreated event.
* If there is no curator, or if the curator is the auction creator, automatically approve the auction.
*/
function createAuction(
uint256 tokenId,
address tokenContract,
uint256 duration,
uint256 reservePrice,
address payable curator,
uint8 curatorFeePercentage,
address auctionCurrency,
uint256 _startTime
) public override nonReentrant returns (uint256) {
require(
IERC165(tokenContract).supportsInterface(interfaceId),
"tokenContract does not support ERC721 interface"
);
require(curatorFeePercentage < 100, "curatorFeePercentage must be less than 100");
require(tokenContract == media, "only Atro token place");
require(reservePrice >= minBidIncrementWei,"first bid must be greater than 0.01 eth");
require (_startTime == 0 || _startTime >= block.timestamp,"Start time must be greater than equal to current time ");
if(_startTime == 0){
_startTime = block.timestamp;
}
address tokenOwner = IERC721(tokenContract).ownerOf(tokenId);
require(msg.sender == IERC721(tokenContract).getApproved(tokenId) || msg.sender == tokenOwner, "Caller must be approved or owner for token id");
uint256 auctionId = _auctionIdTracker.current();
auctions[auctionId] = Auction({
tokenId: tokenId,
tokenContract: tokenContract,
approved: false,
amount: 0,
duration: duration,
firstBidTime: 0,
reservePrice: reservePrice,
curatorFeePercentage: curatorFeePercentage,
tokenOwner: tokenOwner,
bidder: address(0),
curator: curator,
auctionCurrency: auctionCurrency,
startTime: _startTime
});
IERC721(tokenContract).transferFrom(tokenOwner, address(this), tokenId);
_auctionIdTracker.increment();
emit AuctionCreated(auctionId, tokenId, tokenContract, duration, reservePrice, tokenOwner, curator, curatorFeePercentage, auctionCurrency,_startTime);
if(auctions[auctionId].curator == address(0) || curator == tokenOwner) {
_approveAuction(auctionId,true);
}
return auctionId;
}
/**
* @notice Approve an auction, opening up the auction for bids.
* @dev Only callable by the curator. Cannot be called if the auction has already started.
*/
function setAuctionApproval(uint256 auctionId, bool approved) external override auctionExists(auctionId) {
require(msg.sender == auctions[auctionId].curator, "Must be auction curator");
require(auctions[auctionId].firstBidTime == 0, "Auction has already started");
_approveAuction(auctionId, approved);
}
function setAuctionReservePrice(uint256 auctionId, uint256 reservePrice) external override auctionExists(auctionId) {
require(msg.sender == auctions[auctionId].curator || msg.sender == auctions[auctionId].tokenOwner, "Must be auction curator or token owner");
require(auctions[auctionId].firstBidTime == 0, "Auction has already started");
auctions[auctionId].reservePrice = reservePrice;
emit AuctionReservePriceUpdated(auctionId, auctions[auctionId].tokenId, auctions[auctionId].tokenContract, reservePrice);
}
function rescheduleAuctionTime(uint256 auctionId, uint256 newStartTime) external override auctionExists(auctionId) {
require(msg.sender == auctions[auctionId].curator || msg.sender == auctions[auctionId].tokenOwner, "Must be auction curator or token owner");
require(auctions[auctionId].firstBidTime == 0, "Auction has already started");
require(auctions[auctionId].startTime > block.timestamp,"Enable to Reschedule Auction Time" );
require (newStartTime >= block.timestamp,"Start time must be greater than equal to current time ");
auctions[auctionId].startTime = newStartTime;
emit RescheduleAuctionTime(auctionId, auctions[auctionId].tokenId, auctions[auctionId].tokenContract, newStartTime);
}
/**
* @notice Create a bid on a token, with a given amount.
* @dev If provided a valid bid, transfers the provided amount to this contract.
* If the auction is run in native ETH, the ETH is wrapped so it can be identically to other
* auction currencies in this contract.
*/
function createBid(uint256 auctionId, uint256 amount)
external
override
payable
auctionExists(auctionId)
nonReentrant
{
address payable lastBidder = auctions[auctionId].bidder;
require(auctions[auctionId].approved, "Auction must be approved by curator");
require (auctions[auctionId].startTime <= block.timestamp,"Auction is not begun");
require(
block.timestamp <
auctions[auctionId].startTime.add(auctions[auctionId].duration),
"Auction expired"
);
require(
amount >= auctions[auctionId].reservePrice,
"Must send at least reservePrice"
);
require(
amount >= auctions[auctionId].amount.add(minBidIncrementWei),
"Must send more than last bid by minBidIncrementWei amount"
);
// For Zora Protocol, ensure that the bid is valid for the current bidShare configuration
if(auctions[auctionId].tokenContract == media) {
require(
IMarket(IMediaExtended(media).marketContract()).isValidBid(
auctions[auctionId].tokenId,
amount
),
"Bid invalid for share splitting"
);
}
// If this is the first valid bid, we should set the starting time now.
// If it's not, then we should refund the last bidder
if(auctions[auctionId].firstBidTime == 0) {
auctions[auctionId].firstBidTime = block.timestamp;
} else if(lastBidder != address(0)) {
_handleOutgoingBid(lastBidder, auctions[auctionId].amount, auctions[auctionId].auctionCurrency);
}
_handleIncomingBid(amount, auctions[auctionId].auctionCurrency);
auctions[auctionId].amount = amount;
auctions[auctionId].bidder = msg.sender;
bool extended = false;
// at this point we know that the timestamp is less than start + duration (since the auction would be over, otherwise)
// we want to know by how much the timestamp is less than start + duration
// if the difference is less than the timeBuffer, increase the duration by the timeBuffer
if (
auctions[auctionId].startTime.add(auctions[auctionId].duration).sub(
block.timestamp
) < timeBuffer
) {
// Playing code golf for gas optimization:
// uint256 expectedEnd = auctions[auctionId].startTime.add(auctions[auctionId].duration);
// uint256 timeRemaining = expectedEnd.sub(block.timestamp);
// uint256 timeToAdd = timeBuffer.sub(timeRemaining);
// uint256 newDuration = auctions[auctionId].duration.add(timeToAdd);
uint256 oldDuration = auctions[auctionId].duration;
auctions[auctionId].duration =
oldDuration.add(timeBuffer.sub(auctions[auctionId].startTime.add(oldDuration).sub(block.timestamp)));
extended = true;
}
emit AuctionBid(
auctionId,
auctions[auctionId].tokenId,
auctions[auctionId].tokenContract,
msg.sender,
amount,
lastBidder == address(0), // firstBid boolean
extended
);
if (extended) {
emit AuctionDurationExtended(
auctionId,
auctions[auctionId].tokenId,
auctions[auctionId].tokenContract,
auctions[auctionId].duration
);
}
}
/**
* @notice End an auction, finalizing the bid on Zora if applicable and paying out the respective parties.
* @dev If for some reason the auction cannot be finalized (invalid token recipient, for example),
* The auction is reset and the NFT is transferred back to the auction creator.
*/
function endAuction(uint256 auctionId) external override auctionExists(auctionId) nonReentrant {
require(
uint256(auctions[auctionId].firstBidTime) != 0,
"Auction hasn't begun"
);
require(
block.timestamp >=
auctions[auctionId].startTime.add(auctions[auctionId].duration),
"Auction hasn't completed"
);
address currency = auctions[auctionId].auctionCurrency == address(0) ? wethAddress : auctions[auctionId].auctionCurrency;
uint256 curatorFee = 0;
uint256 tokenOwnerProfit = auctions[auctionId].amount;
if(auctions[auctionId].tokenContract == media) {
// If the auction is running on media, settle it on the protocol
(bool success, uint256 remainingProfit) = _handleZoraAuctionSettlement(auctionId);
tokenOwnerProfit = remainingProfit;
if(success != true) {
_handleOutgoingBid(auctions[auctionId].bidder, auctions[auctionId].amount, auctions[auctionId].auctionCurrency);
_cancelAuction(auctionId);
return;
}
} else {
// Otherwise, transfer the token to the winner and pay out the participants below
try IERC721(auctions[auctionId].tokenContract).safeTransferFrom(address(this), auctions[auctionId].bidder, auctions[auctionId].tokenId) {} catch {
_handleOutgoingBid(auctions[auctionId].bidder, auctions[auctionId].amount, auctions[auctionId].auctionCurrency);
_cancelAuction(auctionId);
return;
}
}
if(auctions[auctionId].curator != address(0)) {
curatorFee = tokenOwnerProfit.mul(auctions[auctionId].curatorFeePercentage).div(100);
tokenOwnerProfit = tokenOwnerProfit.sub(curatorFee);
_handleOutgoingBid(auctions[auctionId].curator, curatorFee, auctions[auctionId].auctionCurrency);
}
if(IMedia(media).owner() == auctions[auctionId].tokenOwner || IMedia(media).authorize(auctions[auctionId].tokenOwner)){
_handleOutgoingBid(IMedia(media).getTreasurerAddress(), tokenOwnerProfit, auctions[auctionId].auctionCurrency);
}
else{
_handleOutgoingBid(auctions[auctionId].tokenOwner, tokenOwnerProfit, auctions[auctionId].auctionCurrency);
}
emit AuctionEnded(
auctionId,
auctions[auctionId].tokenId,
auctions[auctionId].tokenContract,
auctions[auctionId].tokenOwner,
auctions[auctionId].curator,
auctions[auctionId].bidder,
tokenOwnerProfit,
curatorFee,
currency
);
delete auctions[auctionId];
}
/**
* @notice Cancel an auction.
* @dev Transfers the NFT back to the auction creator and emits an AuctionCanceled event
*/
function cancelAuction(uint256 auctionId) external override nonReentrant auctionExists(auctionId) {
require(
auctions[auctionId].tokenOwner == msg.sender || auctions[auctionId].curator == msg.sender,
"Can only be called by auction creator or curator"
);
require(
uint256(auctions[auctionId].firstBidTime) == 0,
"Can't cancel an auction once it's begun"
);
_cancelAuction(auctionId);
}
/**
* @dev Given an amount and a currency, transfer the currency to this contract.
* If the currency is ETH (0x0), attempt to wrap the amount as WETH
*/
function _handleIncomingBid(uint256 amount, address currency) internal {
// If this is an ETH bid, ensure they sent enough and convert it to WETH under the hood
if(currency == address(0)) {
require(msg.value == amount, "Sent ETH Value does not match specified bid amount");
IWETH(wethAddress).deposit{value: amount}();
} else {
// We must check the balance that was actually transferred to the auction,
// as some tokens impose a transfer fee and would not actually transfer the
// full amount to the market, resulting in potentally locked funds
IERC20 token = IERC20(currency);
uint256 beforeBalance = token.balanceOf(address(this));
token.safeTransferFrom(msg.sender, address(this), amount);
uint256 afterBalance = token.balanceOf(address(this));
require(beforeBalance.add(amount) == afterBalance, "Token transfer call did not transfer expected amount");
}
}
function _handleOutgoingBid(address to, uint256 amount, address currency) internal {
// If the auction is in ETH, unwrap it from its underlying WETH and try to send it to the recipient.
if(currency == address(0)) {
IWETH(wethAddress).withdraw(amount);
// If the ETH transfer fails (sigh), rewrap the ETH and try send it as WETH.
if(!_safeTransferETH(to, amount)) {
IWETH(wethAddress).deposit{value: amount}();
IERC20(wethAddress).safeTransfer(to, amount);
}
} else {
IERC20(currency).safeTransfer(to, amount);
}
}
function _safeTransferETH(address to, uint256 value) internal returns (bool) {
(bool success, ) = to.call{value: value}(new bytes(0));
return success;
}
function _cancelAuction(uint256 auctionId) internal {
address tokenOwner = auctions[auctionId].tokenOwner;
IERC721(auctions[auctionId].tokenContract).safeTransferFrom(address(this), tokenOwner, auctions[auctionId].tokenId);
emit AuctionCanceled(auctionId, auctions[auctionId].tokenId, auctions[auctionId].tokenContract, tokenOwner);
delete auctions[auctionId];
}
function _approveAuction(uint256 auctionId, bool approved) internal {
auctions[auctionId].approved = approved;
emit AuctionApprovalUpdated(auctionId, auctions[auctionId].tokenId, auctions[auctionId].tokenContract, approved);
}
function _exists(uint256 auctionId) internal view returns(bool) {
return auctions[auctionId].tokenOwner != address(0);
}
function _handleZoraAuctionSettlement(uint256 auctionId) internal returns (bool, uint256) {
address currency = auctions[auctionId].auctionCurrency == address(0) ? wethAddress : auctions[auctionId].auctionCurrency;
IMarket.Bid memory bid = IMarket.Bid({
amount: auctions[auctionId].amount,
currency: currency,
bidder: address(this),
recipient: auctions[auctionId].bidder,
sellOnShare: Decimal.D256(0)
});
IERC20(currency).approve(IMediaExtended(media).marketContract(), bid.amount);
IMedia(media).setBid(auctions[auctionId].tokenId, bid);
uint256 beforeBalance = IERC20(currency).balanceOf(address(this));
try IMedia(media).acceptBid(auctions[auctionId].tokenId, bid) {} catch {
// If the underlying NFT transfer here fails, we should cancel the auction and refund the winner
IMediaExtended(media).removeBid(auctions[auctionId].tokenId);
return (false, 0);
}
uint256 afterBalance = IERC20(currency).balanceOf(address(this));
// We have to calculate the amount to send to the token owner here in case there was a
// sell-on share on the token
return (true, afterBalance.sub(beforeBalance));
}
// TODO: consider reverting if the message sender is not WETH
receive() external payable {}
fallback() external payable {}
}