//./packages/traceability/issuer/contracts$ truffle-flattener RegistryExtended.sol
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
//
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC1155/IERC1155.sol
//
// OpenZeppelin Contracts v4.4.1 (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
//
// OpenZeppelin Contracts v4.4.1 (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
//
// OpenZeppelin Contracts v4.4.1 (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
//
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/utils/Context.sol
//
// OpenZeppelin Contracts v4.4.1 (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/utils/introspection/ERC165.sol
//
// OpenZeppelin Contracts v4.4.1 (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
//
// OpenZeppelin Contracts v4.4.1 (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 {
_setApprovalForAll(_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 `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][to] += amount;
emit TransferSingle(operator, address(0), to, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), to, 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 `from`
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `from` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
emit TransferSingle(operator, from, 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 from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), ids, amounts, "");
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: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
}
emit TransferBatch(operator, from, address(0), ids, amounts);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC1155: setting approval status for self");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @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.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.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: contracts/ERC1888/IERC1888.sol
//
pragma solidity 0.8.4;
interface ERC1888 is IERC1155 {
struct Certificate {
uint256 topic;
address issuer;
bytes validityData;
bytes data;
}
event IssuanceSingle(address indexed _issuer, uint256 indexed _topic, uint256 _id, uint256 _value);
event IssuanceBatch(address indexed _issuer, uint256[] indexed _topics, uint256[] _ids, uint256[] _values);
event ClaimSingle(address indexed _claimIssuer, address indexed _claimSubject, uint256 indexed _topic, uint256 _id, uint256 _value, bytes _claimData);
event ClaimBatch(address indexed _claimIssuer, address indexed _claimSubject, uint256[] indexed _topics, uint256[] _ids, uint256[] _values, bytes[] _claimData);
function issue(address _to, bytes calldata _validityData, uint256 _topic, uint256 _value, bytes calldata _data) external returns (uint256 id);
function batchIssue(address _to, bytes[] calldata _validityData, uint256[] calldata _topics, uint256[] calldata _values, bytes[] calldata _data) external returns (uint256[] memory ids);
function safeTransferAndClaimFrom(address _from, address _to, uint256 _id, uint256 _value, bytes calldata _data, bytes calldata _claimData) external;
function safeBatchTransferAndClaimFrom(address _from, address _to, uint256[] calldata _ids, uint256[] calldata _values, bytes calldata _data, bytes[] calldata _claimData) external;
function claimedBalanceOf(address _owner, uint256 _id) external view returns (uint256);
function claimedBalanceOfBatch(address[] calldata _owners, uint256[] calldata _ids) external view returns (uint256[] memory);
function getCertificate(uint256 _id) external view returns (address issuer, uint256 topic, bytes memory validityCall, bytes memory data);
}
// File: contracts/Registry.sol
//
pragma solidity 0.8.4;
/// @title Implementation of the Transferable Certificate standard ERC-1888.
/// @dev Also complies to ERC-1155: https://eips.ethereum.org/EIPS/eip-1155.
/// @dev ** Data set to 0 because there is no meaningful check yet to be done on the data
contract Registry is ERC1155, ERC1888 {
// Storage for the Certificate structs
mapping(uint256 => Certificate) public certificateStorage;
// Mapping from token ID to account balances
mapping(uint256 => mapping(address => uint256)) public claimedBalances;
// Incrementing nonce, used for generating certificate IDs
uint256 internal _latestCertificateId;
constructor(string memory _uri) ERC1155(_uri) {
// Trigger ERC1155 constructor
}
/// @notice See {IERC1888-issue}.
/// @dev `_to` cannot be the zero address.
function issue(address _to, bytes calldata _validityData, uint256 _topic, uint256 _value, bytes calldata _data) external override returns (uint256 id) {
require(_to != address(0x0), "_to must be non-zero.");
_validate(_msgSender(), _validityData);
id = ++_latestCertificateId;
ERC1155._mint(_to, id, _value, new bytes(0)); // Check **
certificateStorage[id] = Certificate({
topic: _topic,
issuer: _msgSender(),
validityData: _validityData,
data: _data
});
emit IssuanceSingle(_msgSender(), _topic, id, _value);
}
/// @notice See {IERC1888-batchIssue}.
/// @dev `_to` cannot be the zero address.
/// @dev `_data`, `_values` and `_validityData` must have the same length.
function batchIssue(address _to, bytes[] calldata _validityData, uint256[] calldata _topics, uint256[] calldata _values, bytes[] calldata _data) external override returns (uint256[] memory ids) {
require(_to != address(0x0), "_to must be non-zero.");
require(_data.length == _values.length, "Arrays not same length");
require(_values.length == _validityData.length, "Arrays not same length");
ids = new uint256[](_values.length);
address operator = _msgSender();
for (uint256 i = 0; i <= _values.length; i++) {
ids[i] = i + _latestCertificateId + 1;
_validate(operator, _validityData[i]);
}
ERC1155._mintBatch(_to, ids, _values, new bytes(0)); // Check **
for (uint256 i = 0; i < ids.length; i++) {
certificateStorage[ids[i]] = Certificate({
topic: _topics[i],
issuer: operator,
validityData: _validityData[i],
data: _data[i]
});
}
emit IssuanceBatch(operator, _topics, ids, _values);
}
/// @notice Allows the issuer to mint more fungible tokens for existing ERC-188 certificates.
/// @dev Allows batch issuing to an array of _to addresses.
/// @dev `_to` cannot be the zero address.
function mint(uint256 _id, address _to, uint256 _quantity) external {
require(_to != address(0x0), "_to must be non-zero.");
require(_quantity > 0, "_quantity must be above 0.");
Certificate memory cert = certificateStorage[_id];
require(_msgSender() == cert.issuer, "Not original issuer");
ERC1155._mint(_to, _id, _quantity, new bytes(0)); // Check **
}
/// @notice See {IERC1888-safeTransferAndClaimFrom}.
/// @dev `_to` cannot be the zero address.
/// @dev `_from` has to have a balance above or equal `_value`.
function safeTransferAndClaimFrom(
address _from,
address _to,
uint256 _id,
uint256 _value,
bytes calldata _data,
bytes calldata _claimData
) external override {
Certificate memory cert = certificateStorage[_id];
_validate(cert.issuer, cert.validityData);
require(_to != address(0x0), "_to must be non-zero.");
require(_from != address(0x0), "_from address must be non-zero.");
require(_from == _msgSender() || ERC1155.isApprovedForAll(_from, _msgSender()), "No operator approval");
require(ERC1155.balanceOf(_from, _id) >= _value, "_from balance less than _value");
if (_from != _to) {
safeTransferFrom(_from, _to, _id, _value, _data);
}
_burn(_to, _id, _value);
emit ClaimSingle(_from, _to, cert.topic, _id, _value, _claimData); //_claimSubject address ??
}
/// @notice See {IERC1888-safeBatchTransferAndClaimFrom}.
/// @dev `_to` and `_from` cannot be the zero addresses.
/// @dev `_from` has to have a balance above 0.
function safeBatchTransferAndClaimFrom(
address _from,
address _to,
uint256[] calldata _ids,
uint256[] calldata _values,
bytes calldata _data,
bytes[] calldata _claimData
) external override {
require(_to != address(0x0), "_to address must be non-zero");
require(_from != address(0x0), "_from address must be non-zero");
require(_ids.length == _values.length, "Arrays not same length");
require(_values.length == _claimData.length, "Arrays not same length.");
require(_from == _msgSender() || ERC1155.isApprovedForAll(_from, _msgSender()), "No operator approval");
require(_ids.length > 0, "no certificates specified");
uint256 numberOfClaims = _ids.length;
uint256[] memory topics = new uint256[](numberOfClaims);
for (uint256 i = 0; i < numberOfClaims; i++) {
Certificate memory cert = certificateStorage[_ids[i]];
_validate(cert.issuer, cert.validityData);
topics[i] = cert.topic;
}
if (_from != _to) {
safeBatchTransferFrom(_from, _to, _ids, _values, _data);
}
for (uint256 i = 0; i < numberOfClaims; i++) {
_burn(_to, _ids[i], _values[i]);
}
emit ClaimBatch(_from, _to, topics, _ids, _values, _claimData);
}
/// @notice See {IERC1888-claimedBalanceOf}.
function claimedBalanceOf(address _owner, uint256 _id) external override view returns (uint256) {
return claimedBalances[_id][_owner];
}
/// @notice See {IERC1888-claimedBalanceOfBatch}.
function claimedBalanceOfBatch(address[] calldata _owners, uint256[] calldata _ids) external override view returns (uint256[] memory) {
require(_owners.length == _ids.length, "owners and ids length mismatch");
uint256[] memory batchClaimBalances = new uint256[](_owners.length);
for (uint256 i = 0; i < _owners.length; i++) {
batchClaimBalances[i] = this.claimedBalanceOf(_owners[i], _ids[i]);
}
return batchClaimBalances;
}
/// @notice See {IERC1888-getCertificate}.
function getCertificate(uint256 _id) public view override returns (address issuer, uint256 topic, bytes memory validityCall, bytes memory data) {
require(_id <= _latestCertificateId, "_id out of bounds");
Certificate memory certificate = certificateStorage[_id];
return (certificate.issuer, certificate.topic, certificate.validityData, certificate.data);
}
/// @notice Burn certificates after they've been claimed, and increase the claimed balance.
function _burn(address _from, uint256 _id, uint256 _value) internal override {
ERC1155._burn(_from, _id, _value);
claimedBalances[_id][_from] = claimedBalances[_id][_from] + _value;
}
/// @notice Validate if the certificate is valid against an external `_verifier` contract.
function _validate(address _verifier, bytes memory _validityData) internal view {
(bool success, bytes memory result) = _verifier.staticcall(_validityData);
require(success && abi.decode(result, (bool)), "Request/certificate invalid");
}
}
// File: contracts/RegistryExtended.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
/// @title Extension of the Transferable Certificate standard ERC-1888.
contract RegistryExtended is Registry {
event TransferBatchMultiple(address indexed operator, address[] from, address[] to, uint256[] ids, uint256[] values);
event ClaimBatchMultiple(address[] _claimIssuer, address[] _claimSubject, uint256[] indexed _topics, uint256[] _ids, uint256[] _values, bytes[] _claimData);
constructor(string memory _uri) Registry(_uri) {
// Trigger Registry constructor
}
/// @notice Similar to {IERC1888-batchIssue}, but not a part of the ERC-1888 standard.
/// @dev Allows batch issuing to an array of _to addresses.
/// @dev `_to` cannot be the zero addresses.
/// @dev `_to`, `_data`, `_values`, `_topics` and `_validityData` must have the same length.
function batchIssueMultiple(address[] calldata _to, bytes[] calldata _validityData, uint256[] calldata _topics, uint256[] calldata _values, bytes[] calldata _data) external returns (uint256[] memory ids) {
require(_values.length > 0, "no values specified");
require(_to.length == _data.length, "Arrays not same length");
require(_data.length == _values.length, "Arrays not same length");
require(_values.length == _validityData.length, "Arrays not same length");
require(_validityData.length == _topics.length, "Arrays not same length");
ids = new uint256[](_values.length);
address operator = _msgSender();
for (uint256 i = 0; i < _values.length; i++) {
require(_to[i] != address(0x0), "_to must be non-zero.");
ids[i] = i + _latestCertificateId + 1;
_validate(operator, _validityData[i]);
}
for (uint256 i = 0; i < ids.length; i++) {
ERC1155._mint(_to[i], ids[i], _values[i], _data[i]); // Check **
certificateStorage[ids[i]] = Certificate({
topic: _topics[i],
issuer: operator,
validityData: _validityData[i],
data: _data[i]
});
}
_latestCertificateId = ids[ids.length - 1];
emit IssuanceBatch(operator, _topics, ids, _values);
}
/// @notice Similar to {ERC1155-safeBatchTransferFrom}, but not a part of the ERC-1155 standard.
/// @dev Allows batch transferring to/from an array of addresses.
function safeBatchTransferFromMultiple(
address[] calldata _from,
address[] calldata _to,
uint256[] calldata _ids,
uint256[] calldata _values,
bytes[] calldata _data
) external {
require(_from.length == _to.length, "Arrays not same length");
require(_to.length == _ids.length, "Arrays not same length");
require(_ids.length == _values.length, "Arrays not same length");
require(_values.length == _data.length, "Arrays not same length.");
for (uint256 i = 0; i < _ids.length; i++) {
require(_from[i] != address(0x0), "_from must be non-zero.");
require(_to[i] != address(0x0), "_to must be non-zero.");
require(_from[i] == _msgSender() || ERC1155.isApprovedForAll(_from[i], _msgSender()), "No operator approval");
require(ERC1155.balanceOf(_from[i], _ids[i]) >= _values[i], "Not enough balance to transfer");
Certificate memory cert = certificateStorage[_ids[i]];
_validate(cert.issuer, cert.validityData);
}
address operator = _msgSender();
for (uint256 i = 0; i < _ids.length; ++i) {
_safeTransferFrom(_from[i], _to[i], _ids[i], _values[i], _data[i]);
}
emit TransferBatchMultiple(operator, _from, _to, _ids, _values);
}
/// @notice Similar to {IERC1888-safeBatchTransferAndClaimFrom}, but not a part of the ERC-1888 standard.
/// @dev Allows batch claiming to/from an array of addresses.
function safeBatchTransferAndClaimFromMultiple(
address[] calldata _from,
address[] calldata _to,
uint256[] calldata _ids,
uint256[] calldata _values,
bytes[] calldata _data,
bytes[] calldata _claimData
) external {
require(_ids.length > 0, "no certificates specified");
require(_from.length == _to.length, "Arrays not same length");
require(_to.length == _ids.length, "Arrays not same length");
require(_ids.length == _values.length, "Arrays not same length");
require(_values.length == _data.length, "Arrays not same length.");
require(_data.length == _claimData.length, "Arrays not same length.");
uint256[] memory topics = new uint256[](_ids.length);
for (uint256 i = 0; i < _ids.length; i++) {
require(_from[i] != address(0x0), "_from must be non-zero.");
require(_to[i] != address(0x0), "_to must be non-zero.");
require(_from[i] == _msgSender() || ERC1155.isApprovedForAll(_from[i], _msgSender()), "No operator approval");
require(ERC1155.balanceOf(_from[i], _ids[i]) >= _values[i], "Not enough balance to claim");
Certificate memory cert = certificateStorage[_ids[i]];
_validate(cert.issuer, cert.validityData);
}
for (uint256 i = 0; i < _ids.length; i++) {
Certificate memory cert = certificateStorage[_ids[i]];
topics[i] = cert.topic;
if (_from[i] != _to[i]) {
_safeTransferFrom(_from[i], _to[i], _ids[i], _values[i], _data[i]);
}
_burn(_to[i], _ids[i], _values[i]);
}
emit ClaimBatchMultiple(_from, _to, topics, _ids, _values, _claimData);
}
}
