Contract Name:
AssetContractShared
Contract Source Code:
File 1 of 1 : AssetContractShared
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
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() {
_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;
}
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/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);
}
// File: @openzeppelin/contracts/token/ERC1155/IERC1155.sol
pragma solidity ^0.8.0;
/**
* @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;
}
// File: @openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/token/ERC1155/extensions/IERC1155MetadataURI.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/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);
}
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @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;
}
}
// File: @openzeppelin/contracts/token/ERC1155/ERC1155.sol
pragma solidity ^0.8.0;
/**
* @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 ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
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;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution 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) public view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual 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
virtual
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) {
batchBalances[i] = balanceOf(accounts[i], ids[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 virtual 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(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override {
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `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 memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - 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[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
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];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += 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
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence 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;
}
/**
* @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 `account` 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
) internal virtual {
require(account != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][account] += amount;
emit TransferSingle(operator, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* 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 _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
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];
}
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), "");
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
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++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
}
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;
}
}
// File: @openzeppelin/contracts/security/Pausable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: contracts/common/meta-transactions/ContentMixin.sol
pragma solidity 0.8.4;
abstract contract ContextMixin {
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;
}
}
// File: contracts/common/meta-transactions/Initializable.sol
pragma solidity 0.8.4;
contract Initializable {
bool inited = false;
modifier initializer() {
require(!inited, "already inited");
_;
inited = true;
}
}
// File: contracts/common/meta-transactions/EIP712Base.sol
pragma solidity 0.8.4;
contract EIP712Base is Initializable {
struct EIP712Domain {
string name;
string version;
address verifyingContract;
bytes32 salt;
}
string public constant ERC712_VERSION = "1";
bytes32 internal constant EIP712_DOMAIN_TYPEHASH =
keccak256(
bytes(
"EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)"
)
);
bytes32 internal domainSeperator;
// supposed to be called once while initializing.
// one of the contracts that inherits this contract follows proxy pattern
// so it is not possible to do this in a constructor
function _initializeEIP712(string memory name) internal initializer {
_setDomainSeperator(name);
}
function _setDomainSeperator(string memory name) internal {
domainSeperator = keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(name)),
keccak256(bytes(ERC712_VERSION)),
address(this),
bytes32(getChainId())
)
);
}
function getDomainSeperator() public view returns (bytes32) {
return domainSeperator;
}
function getChainId() public view returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
/**
* 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)
);
}
}
// File: contracts/common/meta-transactions/NativeMetaTransaction.sol
pragma solidity 0.8.4;
contract NativeMetaTransaction is EIP712Base {
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;
}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) external 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"
);
// increase nonce for user (to avoid re-use)
nonces[userAddress] += 1;
emit MetaTransactionExecuted(
userAddress,
payable(msg.sender),
functionSignature
);
// 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 successful");
return returnData;
}
function hashMetaTransaction(MetaTransaction memory metaTx)
internal
pure
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) {
require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER");
return
signer ==
ecrecover(
toTypedMessageHash(hashMetaTransaction(metaTx)),
sigV,
sigR,
sigS
);
}
}
// File: contracts/ERC1155Tradable.sol
pragma solidity 0.8.4;
contract OwnableDelegateProxy {}
contract ProxyRegistry {
mapping(address => OwnableDelegateProxy) public proxies;
}
/**
* @title ERC1155Tradable
* ERC1155Tradable - ERC1155 contract that whitelists an operator address, has create and mint functionality, and supports useful standards from OpenZeppelin,
like exists(), name(), symbol(), and totalSupply()
*/
contract ERC1155Tradable is
ContextMixin,
ERC1155,
NativeMetaTransaction,
Ownable,
Pausable
{
using Address for address;
// Proxy registry address
address public proxyRegistryAddress;
// Contract name
string public name;
// Contract symbol
string public symbol;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) private balances;
mapping(uint256 => uint256) private _supply;
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress
) ERC1155("") {
name = _name;
symbol = _symbol;
proxyRegistryAddress = _proxyRegistryAddress;
_initializeEIP712(name);
}
/**
* @dev Throws if called by any account other than the owner or their proxy
*/
modifier onlyOwnerOrProxy() {
require(
_isOwnerOrProxy(_msgSender()),
"ERC1155Tradable#onlyOwner: CALLER_IS_NOT_OWNER"
);
_;
}
/**
* @dev Throws if called by any account other than _from or their proxy
*/
modifier onlyApproved(address _from) {
require(
_from == _msgSender() || isApprovedForAll(_from, _msgSender()),
"ERC1155Tradable#onlyApproved: CALLER_NOT_ALLOWED"
);
_;
}
function _isOwnerOrProxy(address _address) internal view returns (bool) {
return owner() == _address || _isProxyForUser(owner(), _address);
}
function pause() external onlyOwnerOrProxy {
_pause();
}
function unpause() external onlyOwnerOrProxy {
_unpause();
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id)
public
view
virtual
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
virtual
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) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev Returns the total quantity for a token ID
* @param _id uint256 ID of the token to query
* @return amount of token in existence
*/
function totalSupply(uint256 _id) public view returns (uint256) {
return _supply[_id];
}
/**
* Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-free listings.
*/
function isApprovedForAll(address _owner, address _operator)
public
view
override
returns (bool isOperator)
{
// Whitelist OpenSea proxy contracts for easy trading.
if (_isProxyForUser(_owner, _operator)) {
return true;
}
return super.isApprovedForAll(_owner, _operator);
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual override whenNotPaused onlyApproved(from) {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(
operator,
from,
to,
asSingletonArray(id),
asSingletonArray(amount),
data
);
uint256 fromBalance = balances[id][from];
require(
fromBalance >= amount,
"ERC1155: insufficient balance for transfer"
);
balances[id][from] = fromBalance - amount;
balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual override whenNotPaused onlyApproved(from) {
require(
ids.length == amounts.length,
"ERC1155: IDS_AMOUNTS_LENGTH_MISMATCH"
);
require(to != address(0), "ERC1155: transfer to the zero address");
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];
uint256 fromBalance = balances[id][from];
require(
fromBalance >= amount,
"ERC1155: insufficient balance for transfer"
);
balances[id][from] = fromBalance - amount;
balances[id][to] += amount;
}
emit TransferBatch(operator, from, to, ids, amounts);
doSafeBatchTransferAcceptanceCheck(
operator,
from,
to,
ids,
amounts,
data
);
}
/**
* @dev Hook to be called right before minting
* @param _id Token ID to mint
* @param _quantity Amount of tokens to mint
*/
function _beforeMint(uint256 _id, uint256 _quantity) internal virtual {}
/**
* @dev Mints some amount of tokens to an address
* @param _to Address of the future owner of the token
* @param _id Token ID to mint
* @param _quantity Amount of tokens to mint
* @param _data Data to pass if receiver is contract
*/
function mint(
address _to,
uint256 _id,
uint256 _quantity,
bytes memory _data
) public virtual onlyOwnerOrProxy {
_mint(_to, _id, _quantity, _data);
}
/**
* @dev Mint tokens for each id in _ids
* @param _to The address to mint tokens to
* @param _ids Array of ids to mint
* @param _quantities Array of amounts of tokens to mint per id
* @param _data Data to pass if receiver is contract
*/
function batchMint(
address _to,
uint256[] memory _ids,
uint256[] memory _quantities,
bytes memory _data
) public virtual onlyOwnerOrProxy {
_batchMint(_to, _ids, _quantities, _data);
}
/**
* @dev Burns amount of a given token id
* @param _from The address to burn tokens from
* @param _id Token ID to burn
* @param _quantity Amount to burn
*/
function burn(
address _from,
uint256 _id,
uint256 _quantity
) public virtual onlyApproved(_from) {
_burn(_from, _id, _quantity);
}
/**
* @dev Burns tokens for each id in _ids
* @param _from The address to burn tokens from
* @param _ids Array of token ids to burn
* @param _quantities Array of the amount to be burned
*/
function batchBurn(
address _from,
uint256[] memory _ids,
uint256[] memory _quantities
) public virtual onlyApproved(_from) {
_burnBatch(_from, _ids, _quantities);
}
/**
* @dev Returns whether the specified token is minted
* @param _id uint256 ID of the token to query the existence of
* @return bool whether the token exists
*/
function exists(uint256 _id) public view returns (bool) {
return _supply[_id] > 0;
}
// Overrides ERC1155 _mint to allow changing birth events to creator transfers,
// and to set _supply
function _mint(
address _to,
uint256 _id,
uint256 _amount,
bytes memory _data
) internal virtual override whenNotPaused {
address operator = _msgSender();
_beforeTokenTransfer(
operator,
address(0),
_to,
asSingletonArray(_id),
asSingletonArray(_amount),
_data
);
_beforeMint(_id, _amount);
// Add _amount
balances[_id][_to] += _amount;
_supply[_id] += _amount;
// Origin of token will be the _from parameter
address origin = _origin(_id);
// Emit event
emit TransferSingle(operator, origin, _to, _id, _amount);
// Calling onReceive method if recipient is contract
doSafeTransferAcceptanceCheck(
operator,
origin,
_to,
_id,
_amount,
_data
);
}
// Overrides ERC1155MintBurn to change the batch birth events to creator transfers, and to set _supply
function _batchMint(
address _to,
uint256[] memory _ids,
uint256[] memory _amounts,
bytes memory _data
) internal virtual whenNotPaused {
require(
_ids.length == _amounts.length,
"ERC1155Tradable#batchMint: INVALID_ARRAYS_LENGTH"
);
// Number of mints to execute
uint256 nMint = _ids.length;
// Origin of tokens will be the _from parameter
address origin = _origin(_ids[0]);
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), _to, _ids, _amounts, _data);
// Executing all minting
for (uint256 i = 0; i < nMint; i++) {
// Update storage balance
uint256 id = _ids[i];
uint256 amount = _amounts[i];
_beforeMint(id, amount);
require(
_origin(id) == origin,
"ERC1155Tradable#batchMint: MULTIPLE_ORIGINS_NOT_ALLOWED"
);
balances[id][_to] += amount;
_supply[id] += amount;
}
// Emit batch mint event
emit TransferBatch(operator, origin, _to, _ids, _amounts);
// Calling onReceive method if recipient is contract
doSafeBatchTransferAcceptanceCheck(
operator,
origin,
_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 override whenNotPaused {
require(account != address(0), "ERC1155#_burn: BURN_FROM_ZERO_ADDRESS");
require(amount > 0, "ERC1155#_burn: AMOUNT_LESS_THAN_ONE");
address operator = _msgSender();
_beforeTokenTransfer(
operator,
account,
address(0),
asSingletonArray(id),
asSingletonArray(amount),
""
);
uint256 accountBalance = balances[id][account];
require(
accountBalance >= amount,
"ERC1155#_burn: AMOUNT_EXCEEDS_BALANCE"
);
balances[id][account] = accountBalance - amount;
_supply[id] -= amount;
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 override whenNotPaused {
require(account != address(0), "ERC1155: BURN_FROM_ZERO_ADDRESS");
require(
ids.length == amounts.length,
"ERC1155: IDS_AMOUNTS_LENGTH_MISMATCH"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 accountBalance = balances[id][account];
require(
accountBalance >= amount,
"ERC1155#_burnBatch: AMOUNT_EXCEEDS_BALANCE"
);
balances[id][account] = accountBalance - amount;
_supply[id] -= amount;
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
// Override this to change birth events' _from address
function _origin(
uint256 /* _id */
) internal view virtual returns (address) {
return address(0);
}
// PROXY HELPER METHODS
function _isProxyForUser(address _user, address _address)
internal
view
virtual
returns (bool)
{
if (!proxyRegistryAddress.isContract()) {
return false;
}
ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
return address(proxyRegistry.proxies(_user)) == _address;
}
// Copied from OpenZeppelin
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/c3ae4790c71b7f53cc8fff743536dcb7031fed74/contracts/token/ERC1155/ERC1155.sol#L394
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");
}
}
}
// Copied from OpenZeppelin
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/c3ae4790c71b7f53cc8fff743536dcb7031fed74/contracts/token/ERC1155/ERC1155.sol#L417
function doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal {
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");
}
}
}
// Copied from OpenZeppelin
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/c3ae4790c71b7f53cc8fff743536dcb7031fed74/contracts/token/ERC1155/ERC1155.sol#L440
function asSingletonArray(uint256 element)
private
pure
returns (uint256[] memory)
{
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
/**
* This is used instead of msg.sender as transactions won't be sent by the original token owner, but by OpenSea.
*/
function _msgSender() internal view override returns (address sender) {
return ContextMixin.msgSender();
}
}
// File: contracts/AssetContract.sol
pragma solidity 0.8.4;
/**
* @title AssetContract
* AssetContract - A contract for easily creating non-fungible assets on OpenSea.
*/
contract AssetContract is ERC1155Tradable {
event PermanentURI(string _value, uint256 indexed _id);
uint256 constant TOKEN_SUPPLY_CAP = 1;
string public templateURI;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURI;
// Mapping for whether a token URI is set permanently
mapping(uint256 => bool) private _isPermanentURI;
modifier onlyTokenAmountOwned(
address _from,
uint256 _id,
uint256 _quantity
) {
require(
_ownsTokenAmount(_from, _id, _quantity),
"AssetContract#onlyTokenAmountOwned: ONLY_TOKEN_AMOUNT_OWNED_ALLOWED"
);
_;
}
/**
* @dev Require the URI to be impermanent
*/
modifier onlyImpermanentURI(uint256 id) {
require(
!isPermanentURI(id),
"AssetContract#onlyImpermanentURI: URI_CANNOT_BE_CHANGED"
);
_;
}
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress,
string memory _templateURI
) ERC1155Tradable(_name, _symbol, _proxyRegistryAddress) {
if (bytes(_templateURI).length > 0) {
setTemplateURI(_templateURI);
}
}
function openSeaVersion() public pure returns (string memory) {
return "2.1.0";
}
/**
* @dev Require _from to own a specified quantity of the token
*/
function _ownsTokenAmount(
address _from,
uint256 _id,
uint256 _quantity
) internal view returns (bool) {
return balanceOf(_from, _id) >= _quantity;
}
/**
* Compat for factory interfaces on OpenSea
* Indicates that this contract can return balances for
* tokens that haven't been minted yet
*/
function supportsFactoryInterface() public pure returns (bool) {
return true;
}
function setTemplateURI(string memory _uri) public onlyOwnerOrProxy {
templateURI = _uri;
}
function setURI(uint256 _id, string memory _uri)
public
virtual
onlyOwnerOrProxy
onlyImpermanentURI(_id)
{
_setURI(_id, _uri);
}
function setPermanentURI(uint256 _id, string memory _uri)
public
virtual
onlyOwnerOrProxy
onlyImpermanentURI(_id)
{
_setPermanentURI(_id, _uri);
}
function isPermanentURI(uint256 _id) public view returns (bool) {
return _isPermanentURI[_id];
}
function uri(uint256 _id) public view override returns (string memory) {
string memory tokenUri = _tokenURI[_id];
if (bytes(tokenUri).length != 0) {
return tokenUri;
}
return templateURI;
}
function balanceOf(address _owner, uint256 _id)
public
view
virtual
override
returns (uint256)
{
uint256 balance = super.balanceOf(_owner, _id);
return
_isCreatorOrProxy(_id, _owner)
? balance + _remainingSupply(_id)
: balance;
}
function safeTransferFrom(
address _from,
address _to,
uint256 _id,
uint256 _amount,
bytes memory _data
) public override {
uint256 mintedBalance = super.balanceOf(_from, _id);
if (mintedBalance < _amount) {
// Only mint what _from doesn't already have
mint(_to, _id, _amount - mintedBalance, _data);
if (mintedBalance > 0) {
super.safeTransferFrom(_from, _to, _id, mintedBalance, _data);
}
} else {
super.safeTransferFrom(_from, _to, _id, _amount, _data);
}
}
function safeBatchTransferFrom(
address _from,
address _to,
uint256[] memory _ids,
uint256[] memory _amounts,
bytes memory _data
) public override {
require(
_ids.length == _amounts.length,
"AssetContract#safeBatchTransferFrom: INVALID_ARRAYS_LENGTH"
);
for (uint256 i = 0; i < _ids.length; i++) {
safeTransferFrom(_from, _to, _ids[i], _amounts[i], _data);
}
}
function _beforeMint(uint256 _id, uint256 _quantity)
internal
view
override
{
require(
_quantity <= _remainingSupply(_id),
"AssetContract#_beforeMint: QUANTITY_EXCEEDS_TOKEN_SUPPLY_CAP"
);
}
// Overrides ERC1155Tradable burn to check for quantity owned
function burn(
address _from,
uint256 _id,
uint256 _quantity
) public override onlyTokenAmountOwned(_from, _id, _quantity) {
super.burn(_from, _id, _quantity);
}
// Overrides ERC1155Tradable batchBurn to check for quantity owned
function batchBurn(
address _from,
uint256[] memory _ids,
uint256[] memory _quantities
) public override {
for (uint256 i = 0; i < _ids.length; i++) {
require(
_ownsTokenAmount(_from, _ids[i], _quantities[i]),
"AssetContract#batchBurn: ONLY_TOKEN_AMOUNT_OWNED_ALLOWED"
);
}
super.batchBurn(_from, _ids, _quantities);
}
function _mint(
address _to,
uint256 _id,
uint256 _quantity,
bytes memory _data
) internal override {
super._mint(_to, _id, _quantity, _data);
if (_data.length > 1) {
_setURI(_id, string(_data));
}
}
function _isCreatorOrProxy(uint256, address _address)
internal
view
virtual
returns (bool)
{
return _isOwnerOrProxy(_address);
}
function _remainingSupply(uint256 _id)
internal
view
virtual
returns (uint256)
{
return TOKEN_SUPPLY_CAP - totalSupply(_id);
}
// Override ERC1155Tradable for birth events
function _origin(
uint256 /* _id */
) internal view virtual override returns (address) {
return owner();
}
function _batchMint(
address _to,
uint256[] memory _ids,
uint256[] memory _quantities,
bytes memory _data
) internal virtual override {
super._batchMint(_to, _ids, _quantities, _data);
if (_data.length > 1) {
for (uint256 i = 0; i < _ids.length; i++) {
_setURI(_ids[i], string(_data));
}
}
}
function _setURI(uint256 _id, string memory _uri) internal {
_tokenURI[_id] = _uri;
emit URI(_uri, _id);
}
function _setPermanentURI(uint256 _id, string memory _uri)
internal
virtual
{
require(
bytes(_uri).length > 0,
"AssetContract#setPermanentURI: ONLY_VALID_URI"
);
_isPermanentURI[_id] = true;
_setURI(_id, _uri);
emit PermanentURI(_uri, _id);
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: contracts/TokenIdentifiers.sol
pragma solidity 0.8.4;
/*
DESIGN NOTES:
Token ids are a concatenation of:
* creator: hex address of the creator of the token. 160 bits
* index: Index for this token (the regular ID), up to 2^56 - 1. 56 bits
* supply: Supply cap for this token, up to 2^40 - 1 (1 trillion). 40 bits
*/
/**
* @title TokenIdentifiers
* support for authentication and metadata for token ids
*/
library TokenIdentifiers {
uint8 constant ADDRESS_BITS = 160;
uint8 constant INDEX_BITS = 56;
uint8 constant SUPPLY_BITS = 40;
uint256 constant SUPPLY_MASK = (uint256(1) << SUPPLY_BITS) - 1;
uint256 constant INDEX_MASK =
((uint256(1) << INDEX_BITS) - 1) ^ SUPPLY_MASK;
function tokenMaxSupply(uint256 _id) internal pure returns (uint256) {
return _id & SUPPLY_MASK;
}
function tokenIndex(uint256 _id) internal pure returns (uint256) {
return _id & INDEX_MASK;
}
function tokenCreator(uint256 _id) internal pure returns (address) {
return address(uint160(_id >> (INDEX_BITS + SUPPLY_BITS)));
}
}
// File: contracts/AssetContractShared.sol
pragma solidity 0.8.4;
/**
* @title AssetContractShared
* OpenSea shared asset contract - A contract for easily creating custom assets on OpenSea
*/
contract AssetContractShared is AssetContract, ReentrancyGuard {
// Migration contract address
AssetContractShared public migrationTarget;
mapping(address => bool) public sharedProxyAddresses;
struct Ownership {
uint256 id;
address owner;
}
using TokenIdentifiers for uint256;
event CreatorChanged(uint256 indexed _id, address indexed _creator);
mapping(uint256 => address) internal _creatorOverride;
/**
* @dev Require msg.sender to be the creator of the token id
*/
modifier creatorOnly(uint256 _id) {
require(
_isCreatorOrProxy(_id, _msgSender()),
"AssetContractShared#creatorOnly: ONLY_CREATOR_ALLOWED"
);
_;
}
/**
* @dev Require the caller to own the full supply of the token
*/
modifier onlyFullTokenOwner(uint256 _id) {
require(
_ownsTokenAmount(_msgSender(), _id, _id.tokenMaxSupply()),
"AssetContractShared#onlyFullTokenOwner: ONLY_FULL_TOKEN_OWNER_ALLOWED"
);
_;
}
constructor(
string memory _name,
string memory _symbol,
address _proxyRegistryAddress,
string memory _templateURI,
address _migrationAddress
) AssetContract(_name, _symbol, _proxyRegistryAddress, _templateURI) {
migrationTarget = AssetContractShared(_migrationAddress);
}
/**
* @dev Allows owner to change the proxy registry
*/
function setProxyRegistryAddress(address _address) public onlyOwnerOrProxy {
proxyRegistryAddress = _address;
}
/**
* @dev Allows owner to add a shared proxy address
*/
function addSharedProxyAddress(address _address) public onlyOwnerOrProxy {
sharedProxyAddresses[_address] = true;
}
/**
* @dev Allows owner to remove a shared proxy address
*/
function removeSharedProxyAddress(address _address)
public
onlyOwnerOrProxy
{
delete sharedProxyAddresses[_address];
}
/**
* @dev Allows owner to disable the ability to migrate
*/
function disableMigrate() public onlyOwnerOrProxy {
migrationTarget = AssetContractShared(address(0));
}
/**
* @dev Migrate state from previous contract
*/
function migrate(Ownership[] memory _ownerships) public onlyOwnerOrProxy {
AssetContractShared _migrationTarget = migrationTarget;
require(
_migrationTarget != AssetContractShared(address(0)),
"AssetContractShared#migrate: MIGRATE_DISABLED"
);
string memory _migrationTargetTemplateURI =
_migrationTarget.templateURI();
for (uint256 i = 0; i < _ownerships.length; ++i) {
uint256 id = _ownerships[i].id;
address owner = _ownerships[i].owner;
require(
owner != address(0),
"AssetContractShared#migrate: ZERO_ADDRESS_NOT_ALLOWED"
);
uint256 previousAmount = _migrationTarget.balanceOf(owner, id);
if (previousAmount == 0) {
continue;
}
_mint(owner, id, previousAmount, "");
if (
keccak256(bytes(_migrationTarget.uri(id))) !=
keccak256(bytes(_migrationTargetTemplateURI))
) {
_setPermanentURI(id, _migrationTarget.uri(id));
}
}
}
function mint(
address _to,
uint256 _id,
uint256 _quantity,
bytes memory _data
) public override nonReentrant creatorOnly(_id) {
_mint(_to, _id, _quantity, _data);
}
function batchMint(
address _to,
uint256[] memory _ids,
uint256[] memory _quantities,
bytes memory _data
) public override nonReentrant {
for (uint256 i = 0; i < _ids.length; i++) {
require(
_isCreatorOrProxy(_ids[i], _msgSender()),
"AssetContractShared#_batchMint: ONLY_CREATOR_ALLOWED"
);
}
_batchMint(_to, _ids, _quantities, _data);
}
/////////////////////////////////
// CONVENIENCE CREATOR METHODS //
/////////////////////////////////
/**
* @dev Will update the URI for the token
* @param _id The token ID to update. msg.sender must be its creator, the uri must be impermanent,
* and the creator must own all of the token supply
* @param _uri New URI for the token.
*/
function setURI(uint256 _id, string memory _uri)
public
override
creatorOnly(_id)
onlyImpermanentURI(_id)
onlyFullTokenOwner(_id)
{
_setURI(_id, _uri);
}
/**
* @dev setURI, but permanent
*/
function setPermanentURI(uint256 _id, string memory _uri)
public
override
creatorOnly(_id)
onlyImpermanentURI(_id)
onlyFullTokenOwner(_id)
{
_setPermanentURI(_id, _uri);
}
/**
* @dev Change the creator address for given token
* @param _to Address of the new creator
* @param _id Token IDs to change creator of
*/
function setCreator(uint256 _id, address _to) public creatorOnly(_id) {
require(
_to != address(0),
"AssetContractShared#setCreator: INVALID_ADDRESS."
);
_creatorOverride[_id] = _to;
emit CreatorChanged(_id, _to);
}
/**
* @dev Get the creator for a token
* @param _id The token id to look up
*/
function creator(uint256 _id) public view returns (address) {
if (_creatorOverride[_id] != address(0)) {
return _creatorOverride[_id];
} else {
return _id.tokenCreator();
}
}
/**
* @dev Get the maximum supply for a token
* @param _id The token id to look up
*/
function maxSupply(uint256 _id) public pure returns (uint256) {
return _id.tokenMaxSupply();
}
// Override ERC1155Tradable for birth events
function _origin(uint256 _id) internal pure override returns (address) {
return _id.tokenCreator();
}
function _requireMintable(address _address, uint256 _id) internal view {
require(
_isCreatorOrProxy(_id, _address),
"AssetContractShared#_requireMintable: ONLY_CREATOR_ALLOWED"
);
}
function _remainingSupply(uint256 _id)
internal
view
override
returns (uint256)
{
return maxSupply(_id) - totalSupply(_id);
}
function _isCreatorOrProxy(uint256 _id, address _address)
internal
view
override
returns (bool)
{
address creator_ = creator(_id);
return creator_ == _address || _isProxyForUser(creator_, _address);
}
// Overrides ERC1155Tradable to allow a shared proxy address
function _isProxyForUser(address _user, address _address)
internal
view
override
returns (bool)
{
if (sharedProxyAddresses[_address]) {
return true;
}
return super._isProxyForUser(_user, _address);
}
}