ERC-721
Overview
Max Total Supply
2,584 BSV
Holders
266
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Vouchers
Compiler Version
v0.7.6+commit.7338295f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: LGPL-3.0-or-later pragma solidity 0.7.6; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; import "@openzeppelin/contracts/utils/Pausable.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "./interfaces/IVoucherKernel.sol"; import "./interfaces/ICashier.sol"; import "./interfaces/IVouchers.sol"; /** * @title Vouchers implemented as ERC-721 */ contract Vouchers is IVouchers, ERC721, Ownable, Pausable { using Address for address; using Strings for uint256; //min security address private voucherKernelAddress; //address of the VoucherKernel contract address private cashierAddress; //address of the Cashier contract string private contractUri; event LogVoucherKernelSet(address _newVoucherKernel, address _triggeredBy); event LogCashierSet(address _newCashier, address _triggeredBy); event LogUriSet(string _newUri, address _triggeredBy); event LogContractUriSet(string _contractUri, address _triggeredBy); modifier onlyFromVoucherKernel() { require(msg.sender == voucherKernelAddress, "UNAUTHORIZED_VK"); _; } modifier notZeroAddress(address _address) { require(_address != address(0), "ZERO_ADDRESS"); _; } /** * @notice Construct and initialze the contract. * @param baseURI_ base metadata uri * @param name_ token name * @param symbol_ token symbol * @param _cashierAddress address of the associated Cashier contract * @param _voucherKernelAddress address of the associated Voucher Kernel contract */ constructor(string memory baseURI_, string memory name_, string memory symbol_, address _cashierAddress, address _voucherKernelAddress) ERC721(name_, symbol_) notZeroAddress(_cashierAddress) notZeroAddress(_voucherKernelAddress) { _setBaseURI(baseURI_); cashierAddress = _cashierAddress; voucherKernelAddress = _voucherKernelAddress; emit LogCashierSet(_cashierAddress, msg.sender); emit LogVoucherKernelSet(_voucherKernelAddress, msg.sender); } /** * @notice Pause the process of interaction with voucherID's (ERC-721), in case of emergency. * Only BR contract is in control of this function. */ function pause() external override onlyOwner { _pause(); } /** * @notice Unpause the process of interaction with voucherID's (ERC-721). * Only BR contract is in control of this function. */ function unpause() external override onlyOwner { _unpause(); } /** * @notice Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement `onERC721Received` * Requires the msg.sender to be the owner, approved, or operator * @dev ERC-721 * @param _from current owner of the token * @param _to address to receive the ownership of the given token ID * @param _tokenId uint256 ID of the token to be transferred * @param _data bytes data to send along with a safe transfer check */ function safeTransferFrom( address _from, address _to, uint256 _tokenId, bytes memory _data ) public override (ERC721, IERC721) { transferFrom(_from, _to, _tokenId); _doSafeTransferAcceptanceCheck( _from, _to, _tokenId, _data ); } /** * @notice Transfers the ownership of a given token ID to another address. * Usage of this method is discouraged, use `safeTransferFrom` whenever possible. * Requires the msg.sender to be the owner, approved, or operator. * @dev ERC-721 * @param _from current owner of the token * @param _to address to receive the ownership of the given token ID * @param _tokenId uint256 ID of the token to be transferred */ function transferFrom( address _from, address _to, uint256 _tokenId ) public override (ERC721, IERC721) { super.transferFrom(_from, _to, _tokenId); require(IVoucherKernel(voucherKernelAddress).isVoucherTransferable(_tokenId), "FUNDS_RELEASED"); ICashier(cashierAddress).onVoucherTransfer( _from, _to, _tokenId ); } /** * @notice Function to mint tokens. * @dev ERC-721 * @param _to The address that will receive the minted tokens. * @param _tokenId The token id to mint. * @return A boolean that indicates if the operation was successful. */ function mint(address _to, uint256 _tokenId) external override onlyFromVoucherKernel returns (bool) { super._mint(_to, _tokenId); _doSafeTransferAcceptanceCheck( address(0), _to, _tokenId, "" ); return true; } /* Burning ERC-721 is not allowed, as a voucher (being an ERC-721 token) has a final state and shouldn't be destroyed. */ // // // // // // // // // METADATA EXTENSIONS // // // // // // // // /** * @notice Setting the URL prefix for tokens metadata * @param _newUri New prefix to be used */ function setTokenURI(string memory _newUri) external onlyOwner { require(bytes(_newUri).length != 0, "INVALID_VALUE"); super._setBaseURI(_newUri); emit LogUriSet(_newUri, _msgSender()); } /** * @notice Setting a contractURI for OpenSea collections integration. * @param _contractUri The contract URI to be used */ function setContractUri(string memory _contractUri) external onlyOwner { require(bytes(_contractUri).length != 0, "INVALID_VALUE"); contractUri = _contractUri; emit LogContractUriSet(_contractUri, _msgSender()); } // // // // // // // // // UTILS // // // // // // // // /** * @notice Set the address of the VoucherKernel contract * @param _voucherKernelAddress The address of the Voucher Kernel contract */ function setVoucherKernelAddress(address _voucherKernelAddress) external override onlyOwner notZeroAddress(_voucherKernelAddress) whenPaused { voucherKernelAddress = _voucherKernelAddress; emit LogVoucherKernelSet(_voucherKernelAddress, msg.sender); } /** * @notice Set the address of the cashier contract * @param _cashierAddress The Cashier contract */ function setCashierAddress(address _cashierAddress) external override onlyOwner notZeroAddress(_cashierAddress) whenPaused { cashierAddress = _cashierAddress; emit LogCashierSet(_cashierAddress, msg.sender); } /** * @notice Get the address of Voucher Kernel contract * @return Address of Voucher Kernel contract */ function getVoucherKernelAddress() external view override returns (address) { return voucherKernelAddress; } /** * @notice Get the address of Cashier contract * @return Address of Cashier address */ function getCashierAddress() external view override returns (address) { return cashierAddress; } /** * @notice Check successful transfer if recipient is a contract * @dev ERC-721 * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v4.4.0-rc.0/contracts/token/ERC721/ERC721.sol * @param _from Address of sender * @param _to Address of recipient * @param _tokenId ID of the token * @param _data Optional data */ function _doSafeTransferAcceptanceCheck( address _from, address _to, uint256 _tokenId, bytes memory _data ) internal { if (_to.isContract()) { try IERC721Receiver(_to).onERC721Received(_msgSender(), _from, _tokenId, _data) returns (bytes4 response) { if (response != IERC721Receiver.onERC721Received.selector) { revert("ERC721: transfer to a bad receiver implementation"); } } catch Error(string memory reason) { revert(reason); } catch { revert("ERC721: transfer to non ERC721Receiver implementer"); } } } /** * @notice Get the contractURI for Opensea collections integration * @return Contract URI */ function contractURI() public view returns (string memory) { return contractUri; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @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; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @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"); // solhint-disable-next-line avoid-low-level-calls (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 // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; import "../utils/Context.sol"; /** * @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 () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), 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 { emit OwnershipTransferred(_owner, address(0)); _owner = 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"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; import "../../utils/Context.sol"; import "./IERC721.sol"; import "./IERC721Metadata.sol"; import "./IERC721Enumerable.sol"; import "./IERC721Receiver.sol"; import "../../introspection/ERC165.sol"; import "../../math/SafeMath.sol"; import "../../utils/Address.sol"; import "../../utils/EnumerableSet.sol"; import "../../utils/EnumerableMap.sol"; import "../../utils/Strings.sol"; /** * @title ERC721 Non-Fungible Token Standard basic implementation * @dev see https://eips.ethereum.org/EIPS/eip-721 */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using SafeMath for uint256; using Address for address; using EnumerableSet for EnumerableSet.UintSet; using EnumerableMap for EnumerableMap.UintToAddressMap; using Strings for uint256; // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector` bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; // Mapping from holder address to their (enumerable) set of owned tokens mapping (address => EnumerableSet.UintSet) private _holderTokens; // Enumerable mapping from token ids to their owners EnumerableMap.UintToAddressMap private _tokenOwners; // Mapping from token ID to approved address mapping (uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping (address => mapping (address => bool)) private _operatorApprovals; // Token name string private _name; // Token symbol string private _symbol; // Optional mapping for token URIs mapping (uint256 => string) private _tokenURIs; // Base URI string private _baseURI; /* * bytes4(keccak256('balanceOf(address)')) == 0x70a08231 * bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e * bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3 * bytes4(keccak256('getApproved(uint256)')) == 0x081812fc * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465 * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5 * bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde * * => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^ * 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd */ bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; /* * bytes4(keccak256('name()')) == 0x06fdde03 * bytes4(keccak256('symbol()')) == 0x95d89b41 * bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd * * => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f */ bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f; /* * bytes4(keccak256('totalSupply()')) == 0x18160ddd * bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59 * bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7 * * => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63 */ bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor (string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721); _registerInterface(_INTERFACE_ID_ERC721_METADATA); _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _holderTokens[owner].length(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token"); } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory _tokenURI = _tokenURIs[tokenId]; string memory base = baseURI(); // If there is no base URI, return the token URI. if (bytes(base).length == 0) { return _tokenURI; } // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked). if (bytes(_tokenURI).length > 0) { return string(abi.encodePacked(base, _tokenURI)); } // If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI. return string(abi.encodePacked(base, tokenId.toString())); } /** * @dev Returns the base URI set via {_setBaseURI}. This will be * automatically added as a prefix in {tokenURI} to each token's URI, or * to the token ID if no specific URI is set for that token ID. */ function baseURI() public view virtual returns (string memory) { return _baseURI; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { return _holderTokens[owner].at(index); } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { // _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds return _tokenOwners.length(); } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { (uint256 tokenId, ) = _tokenOwners.at(index); return tokenId; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require(_msgSender() == owner || ERC721.isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom(address from, address to, uint256 tokenId) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _tokenOwners.contains(tokenId); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || ERC721.isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: d* * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual { _mint(to, tokenId); require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); // internal owner _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); // Clear metadata (if any) if (bytes(_tokenURIs[tokenId]).length != 0) { delete _tokenURIs[tokenId]; } _holderTokens[owner].remove(tokenId); _tokenOwners.remove(tokenId); emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer(address from, address to, uint256 tokenId) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); // internal owner require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _holderTokens[from].remove(tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(from, to, tokenId); } /** * @dev Sets `_tokenURI` as the tokenURI of `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual { require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token"); _tokenURIs[tokenId] = _tokenURI; } /** * @dev Internal function to set the base URI for all token IDs. It is * automatically added as a prefix to the value returned in {tokenURI}, * or to the token ID if {tokenURI} is empty. */ function _setBaseURI(string memory baseURI_) internal virtual { _baseURI = baseURI_; } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data) private returns (bool) { if (!to.isContract()) { return true; } bytes memory returndata = to.functionCall(abi.encodeWithSelector( IERC721Receiver(to).onERC721Received.selector, _msgSender(), from, tokenId, _data ), "ERC721: transfer to non ERC721Receiver implementer"); bytes4 retval = abi.decode(returndata, (bytes4)); return (retval == _ERC721_RECEIVED); } /** * @dev Approve `to` to operate on `tokenId` * * Emits an {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); // internal owner } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4); }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; import "./Context.sol"; /** * @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()); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @dev String operations. */ library Strings { /** * @dev Converts a `uint256` to its ASCII `string` 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); uint256 index = digits - 1; temp = value; while (temp != 0) { buffer[index--] = bytes1(uint8(48 + temp % 10)); temp /= 10; } return string(buffer); } }
// SPDX-License-Identifier: LGPL-3.0-or-later pragma solidity 0.7.6; import "./../UsingHelpers.sol"; interface IVoucherKernel { /** * @notice Pause the process of interaction with voucherID's (ERC-721), in case of emergency. * Only Cashier contract is in control of this function. */ function pause() external; /** * @notice Unpause the process of interaction with voucherID's (ERC-721). * Only Cashier contract is in control of this function. */ function unpause() external; /** * @notice Creating a new promise for goods or services. * Can be reused, e.g. for making different batches of these (but not in prototype). * @param _seller seller of the promise * @param _validFrom Start of valid period * @param _validTo End of valid period * @param _price Price (payment amount) * @param _depositSe Seller's deposit * @param _depositBu Buyer's deposit */ function createTokenSupplyId( address _seller, uint256 _validFrom, uint256 _validTo, uint256 _price, uint256 _depositSe, uint256 _depositBu, uint256 _quantity ) external returns (uint256); /** * @notice Creates a Payment method struct recording the details on how the seller requires to receive Price and Deposits for a certain Voucher Set. * @param _tokenIdSupply _tokenIdSupply of the voucher set this is related to * @param _paymentMethod might be ETHETH, ETHTKN, TKNETH or TKNTKN * @param _tokenPrice token address which will hold the funds for the price of the voucher * @param _tokenDeposits token address which will hold the funds for the deposits of the voucher */ function createPaymentMethod( uint256 _tokenIdSupply, PaymentMethod _paymentMethod, address _tokenPrice, address _tokenDeposits ) external; /** * @notice Mark voucher token that the payment was released * @param _tokenIdVoucher ID of the voucher token */ function setPaymentReleased(uint256 _tokenIdVoucher) external; /** * @notice Mark voucher token that the deposits were released * @param _tokenIdVoucher ID of the voucher token * @param _to recipient, one of {ISSUER, HOLDER, POOL} * @param _amount amount that was released in the transaction */ function setDepositsReleased( uint256 _tokenIdVoucher, Entity _to, uint256 _amount ) external; /** * @notice Tells if part of the deposit, belonging to entity, was released already * @param _tokenIdVoucher ID of the voucher token * @param _to recipient, one of {ISSUER, HOLDER, POOL} */ function isDepositReleased(uint256 _tokenIdVoucher, Entity _to) external returns (bool); /** * @notice Redemption of the vouchers promise * @param _tokenIdVoucher ID of the voucher * @param _messageSender owner of the voucher */ function redeem(uint256 _tokenIdVoucher, address _messageSender) external; /** * @notice Refunding a voucher * @param _tokenIdVoucher ID of the voucher * @param _messageSender owner of the voucher */ function refund(uint256 _tokenIdVoucher, address _messageSender) external; /** * @notice Issue a complain for a voucher * @param _tokenIdVoucher ID of the voucher * @param _messageSender owner of the voucher */ function complain(uint256 _tokenIdVoucher, address _messageSender) external; /** * @notice Cancel/Fault transaction by the Seller, admitting to a fault or backing out of the deal * @param _tokenIdVoucher ID of the voucher * @param _messageSender owner of the voucher set (seller) */ function cancelOrFault(uint256 _tokenIdVoucher, address _messageSender) external; /** * @notice Cancel/Fault transaction by the Seller, cancelling the remaining uncommitted voucher set so that seller prevents buyers from committing to vouchers for items no longer in exchange. * @param _tokenIdSupply ID of the voucher * @param _issuer owner of the voucher */ function cancelOrFaultVoucherSet(uint256 _tokenIdSupply, address _issuer) external returns (uint256); /** * @notice Fill Voucher Order, iff funds paid, then extract & mint NFT to the voucher holder * @param _tokenIdSupply ID of the supply token (ERC-1155) * @param _issuer Address of the token's issuer * @param _holder Address of the recipient of the voucher (ERC-721) * @param _paymentMethod method being used for that particular order that needs to be fulfilled */ function fillOrder( uint256 _tokenIdSupply, address _issuer, address _holder, PaymentMethod _paymentMethod ) external; /** * @notice Mark voucher token as expired * @param _tokenIdVoucher ID of the voucher token */ function triggerExpiration(uint256 _tokenIdVoucher) external; /** * @notice Mark voucher token to the final status * @param _tokenIdVoucher ID of the voucher token */ function triggerFinalizeVoucher(uint256 _tokenIdVoucher) external; /** * @notice Set the address of the new holder of a _tokenIdSupply on transfer * @param _tokenIdSupply _tokenIdSupply which will be transferred * @param _newSeller new holder of the supply */ function setSupplyHolderOnTransfer( uint256 _tokenIdSupply, address _newSeller ) external; /** * @notice Set the general cancelOrFault period, should be used sparingly as it has significant consequences. Here done simply for demo purposes. * @param _cancelFaultPeriod the new value for cancelOrFault period (in number of seconds) */ function setCancelFaultPeriod(uint256 _cancelFaultPeriod) external; /** * @notice Set the address of the Boson Router contract * @param _bosonRouterAddress The address of the BR contract */ function setBosonRouterAddress(address _bosonRouterAddress) external; /** * @notice Set the address of the Cashier contract * @param _cashierAddress The address of the Cashier contract */ function setCashierAddress(address _cashierAddress) external; /** * @notice Set the address of the Vouchers token contract, an ERC721 contract * @param _voucherTokenAddress The address of the Vouchers token contract */ function setVoucherTokenAddress(address _voucherTokenAddress) external; /** * @notice Set the address of the Voucher Sets token contract, an ERC1155 contract * @param _voucherSetTokenAddress The address of the Voucher Sets token contract */ function setVoucherSetTokenAddress(address _voucherSetTokenAddress) external; /** * @notice Set the general complain period, should be used sparingly as it has significant consequences. Here done simply for demo purposes. * @param _complainPeriod the new value for complain period (in number of seconds) */ function setComplainPeriod(uint256 _complainPeriod) external; /** * @notice Get the promise ID at specific index * @param _idx Index in the array of promise keys * @return Promise ID */ function getPromiseKey(uint256 _idx) external view returns (bytes32); /** * @notice Get the address of the token where the price for the supply is held * @param _tokenIdSupply ID of the voucher token * @return Address of the token */ function getVoucherPriceToken(uint256 _tokenIdSupply) external view returns (address); /** * @notice Get the address of the token where the deposits for the supply are held * @param _tokenIdSupply ID of the voucher token * @return Address of the token */ function getVoucherDepositToken(uint256 _tokenIdSupply) external view returns (address); /** * @notice Get Buyer costs required to make an order for a supply token * @param _tokenIdSupply ID of the supply token * @return returns a tuple (Payment amount, Buyer's deposit) */ function getBuyerOrderCosts(uint256 _tokenIdSupply) external view returns (uint256, uint256); /** * @notice Get Seller deposit * @param _tokenIdSupply ID of the supply token * @return returns sellers deposit */ function getSellerDeposit(uint256 _tokenIdSupply) external view returns (uint256); /** * @notice Get the promise ID from a voucher token * @param _tokenIdVoucher ID of the voucher token * @return ID of the promise */ function getIdSupplyFromVoucher(uint256 _tokenIdVoucher) external pure returns (uint256); /** * @notice Get the promise ID from a voucher token * @param _tokenIdVoucher ID of the voucher token * @return ID of the promise */ function getPromiseIdFromVoucherId(uint256 _tokenIdVoucher) external view returns (bytes32); /** * @notice Get all necessary funds for a supply token * @param _tokenIdSupply ID of the supply token * @return returns a tuple (Payment amount, Seller's deposit, Buyer's deposit) */ function getOrderCosts(uint256 _tokenIdSupply) external view returns ( uint256, uint256, uint256 ); /** * @notice Get the remaining quantity left in supply of tokens (e.g ERC-721 left in ERC-1155) of an account * @param _tokenSupplyId Token supply ID * @param _owner holder of the Token Supply * @return remaining quantity */ function getRemQtyForSupply(uint256 _tokenSupplyId, address _owner) external view returns (uint256); /** * @notice Get the payment method for a particular _tokenIdSupply * @param _tokenIdSupply ID of the voucher supply token * @return payment method */ function getVoucherPaymentMethod(uint256 _tokenIdSupply) external view returns (PaymentMethod); /** * @notice Get the current status of a voucher * @param _tokenIdVoucher ID of the voucher token * @return Status of the voucher (via enum) */ function getVoucherStatus(uint256 _tokenIdVoucher) external view returns ( uint8, bool, bool, uint256, uint256 ); /** * @notice Get the holder of a supply * @param _tokenIdSupply _tokenIdSupply ID of the order (aka VoucherSet) which is mapped to the corresponding Promise. * @return Address of the holder */ function getSupplyHolder(uint256 _tokenIdSupply) external view returns (address); /** * @notice Get the issuer of a voucher * @param _voucherTokenId ID of the voucher token * @return Address of the seller, when voucher was created */ function getVoucherSeller(uint256 _voucherTokenId) external view returns (address); /** * @notice Get the holder of a voucher * @param _tokenIdVoucher ID of the voucher token * @return Address of the holder */ function getVoucherHolder(uint256 _tokenIdVoucher) external view returns (address); /** * @notice Checks whether a voucher is in valid period for redemption (between start date and end date) * @param _tokenIdVoucher ID of the voucher token */ function isInValidityPeriod(uint256 _tokenIdVoucher) external view returns (bool); /** * @notice Checks whether a voucher is in valid state to be transferred. If either payments or deposits are released, voucher could not be transferred * @param _tokenIdVoucher ID of the voucher token */ function isVoucherTransferable(uint256 _tokenIdVoucher) external view returns (bool); /** * @notice Get address of the Boson Router contract to which this contract points * @return Address of the Boson Router contract */ function getBosonRouterAddress() external view returns (address); /** * @notice Get address of the Cashier contract to which this contract points * @return Address of the Cashier contract */ function getCashierAddress() external view returns (address); /** * @notice Get the token nonce for a seller * @param _seller Address of the seller * @return The seller's */ function getTokenNonce(address _seller) external view returns (uint256); /** * @notice Get the current type Id * @return type Id */ function getTypeId() external view returns (uint256); /** * @notice Get the complain period * @return complain period */ function getComplainPeriod() external view returns (uint256); /** * @notice Get the cancel or fault period * @return cancel or fault period */ function getCancelFaultPeriod() external view returns (uint256); /** * @notice Get promise data not retrieved by other accessor functions * @param _promiseKey ID of the promise * @return promise data not returned by other accessor methods */ function getPromiseData(bytes32 _promiseKey) external view returns ( bytes32, uint256, uint256, uint256, uint256 ); /** * @notice Get the promise ID from a voucher set * @param _tokenIdSupply ID of the voucher token * @return ID of the promise */ function getPromiseIdFromSupplyId(uint256 _tokenIdSupply) external view returns (bytes32); /** * @notice Get the address of the Vouchers token contract, an ERC721 contract * @return Address of Vouchers contract */ function getVoucherTokenAddress() external view returns (address); /** * @notice Get the address of the VoucherSets token contract, an ERC155 contract * @return Address of VoucherSets contract */ function getVoucherSetTokenAddress() external view returns (address); }
// SPDX-License-Identifier: LGPL-3.0-or-later pragma solidity 0.7.6; import "./../UsingHelpers.sol"; interface ICashier { /** * @notice Pause the Cashier && the Voucher Kernel contracts in case of emergency. * All functions related to creating new batch, requestVoucher or withdraw will be paused, hence cannot be executed. * There is special function for withdrawing funds if contract is paused. */ function pause() external; /** * @notice Unpause the Cashier && the Voucher Kernel contracts. * All functions related to creating new batch, requestVoucher or withdraw will be unpaused. */ function unpause() external; function canUnpause() external view returns (bool); /** * @notice Trigger withdrawals of what funds are releasable * The caller of this function triggers transfers to all involved entities (pool, issuer, token holder), also paying for gas. * @dev This function would be optimized a lot, here verbose for readability. * @param _tokenIdVoucher ID of a voucher token (ERC-721) to try withdraw funds from */ function withdraw(uint256 _tokenIdVoucher) external; function withdrawSingle(uint256 _tokenIdVoucher, Entity _to) external; /** * @notice External function for withdrawing deposits. Caller must be the seller of the goods, otherwise reverts. * @notice Seller triggers withdrawals of remaining deposits for a given supply, in case the voucher set is no longer in exchange. * @param _tokenIdSupply an ID of a supply token (ERC-1155) which will be burned and deposits will be returned for * @param _burnedQty burned quantity that the deposits should be withdrawn for * @param _messageSender owner of the voucher set */ function withdrawDepositsSe( uint256 _tokenIdSupply, uint256 _burnedQty, address payable _messageSender ) external; /** * @notice Get the amount in escrow of an address * @param _account The address of an account to query * @return The balance in escrow */ function getEscrowAmount(address _account) external view returns (uint256); /** * @notice Update the amount in escrow of an address with the new value, based on VoucherSet/Voucher interaction * @param _account The address of an account to query */ function addEscrowAmount(address _account) external payable; /** * @notice Update the amount in escrowTokens of an address with the new value, based on VoucherSet/Voucher interaction * @param _token The address of a token to query * @param _account The address of an account to query * @param _newAmount New amount to be set */ function addEscrowTokensAmount( address _token, address _account, uint256 _newAmount ) external; /** * @notice Hook which will be triggered when a _tokenIdVoucher will be transferred. Escrow funds should be allocated to the new owner. * @param _from prev owner of the _tokenIdVoucher * @param _to next owner of the _tokenIdVoucher * @param _tokenIdVoucher _tokenIdVoucher that has been transferred */ function onVoucherTransfer( address _from, address _to, uint256 _tokenIdVoucher ) external; /** * @notice After the transfer happens the _tokenSupplyId should be updated in the promise. Escrow funds for the deposits (If in ETH) should be allocated to the new owner as well. * @param _from prev owner of the _tokenSupplyId * @param _to next owner of the _tokenSupplyId * @param _tokenSupplyId _tokenSupplyId for transfer * @param _value qty which has been transferred */ function onVoucherSetTransfer( address _from, address _to, uint256 _tokenSupplyId, uint256 _value ) external; /** * @notice Get the address of Voucher Kernel contract * @return Address of Voucher Kernel contract */ function getVoucherKernelAddress() external view returns (address); /** * @notice Get the address of Boson Router contract * @return Address of Boson Router contract */ function getBosonRouterAddress() external view returns (address); /** * @notice Get the address of the Vouchers contract, an ERC721 contract * @return Address of Vouchers contract */ function getVoucherTokenAddress() external view returns (address); /** * @notice Get the address of the VoucherSets token contract, an ERC155 contract * @return Address of VoucherSets contract */ function getVoucherSetTokenAddress() external view returns (address); /** * @notice Ensure whether or not contract has been set to disaster state * @return disasterState */ function isDisasterStateSet() external view returns (bool); /** * @notice Get the amount in escrow of an address * @param _token The address of a token to query * @param _account The address of an account to query * @return The balance in escrow */ function getEscrowTokensAmount(address _token, address _account) external view returns (uint256); /** * @notice Set the address of the BR contract * @param _bosonRouterAddress The address of the Cashier contract */ function setBosonRouterAddress(address _bosonRouterAddress) external; /** * @notice Set the address of the VoucherKernel contract * @param _voucherKernelAddress The address of the VoucherKernel contract */ function setVoucherKernelAddress(address _voucherKernelAddress) external; /** * @notice Set the address of the Vouchers token contract, an ERC721 contract * @param _voucherTokenAddress The address of the Vouchers token contract */ function setVoucherTokenAddress(address _voucherTokenAddress) external; /** * @notice Set the address of the Voucher Sets token contract, an ERC1155 contract * @param _voucherSetTokenAddress The address of the Voucher Sets token contract */ function setVoucherSetTokenAddress(address _voucherSetTokenAddress) external; }
// SPDX-License-Identifier: LGPL-3.0-or-later pragma solidity 0.7.6; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721Metadata.sol"; interface IVouchers is IERC721, IERC721Metadata { /** * @notice Pause the Cashier && the Voucher Kernel contracts in case of emergency. * All functions related to creating new batch, requestVoucher or withdraw will be paused, hence cannot be executed. * There is special function for withdrawing funds if contract is paused. */ function pause() external; /** * @notice Unpause the Cashier && the Voucher Kernel contracts. * All functions related to creating new batch, requestVoucher or withdraw will be unpaused. */ function unpause() external; /** * @notice Function to mint tokens. * @dev ERC-721 * @param _to The address that will receive the minted tokens. * @param _tokenId The token id to mint. * @return A boolean that indicates if the operation was successful. */ function mint(address _to, uint256 _tokenId) external returns (bool); /** * @notice Set the address of the VoucherKernel contract * @param _voucherKernelAddress The address of the Voucher Kernel contract */ function setVoucherKernelAddress(address _voucherKernelAddress) external; /** * @notice Set the address of the Cashier contract * @param _cashierAddress The address of the Cashier contract */ function setCashierAddress(address _cashierAddress) external; /** * @notice Get the address of Voucher Kernel contract * @return Address of Voucher Kernel contract */ function getVoucherKernelAddress() external view returns (address); /** * @notice Get the address of Cashier contract * @return Address of Cashier address */ function getCashierAddress() external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <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 GSN 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 payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; import "../../introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; import "./IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; import "./IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ abstract contract ERC165 is IERC165 { /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; constructor () { // Derived contracts need only register support for their own interfaces, // we register support for ERC165 itself here _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev See {IERC165-supportsInterface}. * * Time complexity O(1), guaranteed to always use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @dev Library for managing an enumerable variant of Solidity's * https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`] * type. * * Maps have the following properties: * * - Entries are added, removed, and checked for existence in constant time * (O(1)). * - Entries are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableMap for EnumerableMap.UintToAddressMap; * * // Declare a set state variable * EnumerableMap.UintToAddressMap private myMap; * } * ``` * * As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are * supported. */ library EnumerableMap { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Map type with // bytes32 keys and values. // The Map implementation uses private functions, and user-facing // implementations (such as Uint256ToAddressMap) are just wrappers around // the underlying Map. // This means that we can only create new EnumerableMaps for types that fit // in bytes32. struct MapEntry { bytes32 _key; bytes32 _value; } struct Map { // Storage of map keys and values MapEntry[] _entries; // Position of the entry defined by a key in the `entries` array, plus 1 // because index 0 means a key is not in the map. mapping (bytes32 => uint256) _indexes; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex == 0) { // Equivalent to !contains(map, key) map._entries.push(MapEntry({ _key: key, _value: value })); // The entry is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value map._indexes[key] = map._entries.length; return true; } else { map._entries[keyIndex - 1]._value = value; return false; } } /** * @dev Removes a key-value pair from a map. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function _remove(Map storage map, bytes32 key) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex != 0) { // Equivalent to contains(map, key) // To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one // in the array, and then remove the last entry (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = keyIndex - 1; uint256 lastIndex = map._entries.length - 1; // When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. MapEntry storage lastEntry = map._entries[lastIndex]; // Move the last entry to the index where the entry to delete is map._entries[toDeleteIndex] = lastEntry; // Update the index for the moved entry map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved entry was stored map._entries.pop(); // Delete the index for the deleted slot delete map._indexes[key]; return true; } else { return false; } } /** * @dev Returns true if the key is in the map. O(1). */ function _contains(Map storage map, bytes32 key) private view returns (bool) { return map._indexes[key] != 0; } /** * @dev Returns the number of key-value pairs in the map. O(1). */ function _length(Map storage map) private view returns (uint256) { return map._entries.length; } /** * @dev Returns the key-value pair stored at position `index` in the map. O(1). * * Note that there are no guarantees on the ordering of entries inside the * array, and it may change when more entries are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) { require(map._entries.length > index, "EnumerableMap: index out of bounds"); MapEntry storage entry = map._entries[index]; return (entry._key, entry._value); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) { uint256 keyIndex = map._indexes[key]; if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key) return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function _get(Map storage map, bytes32 key) private view returns (bytes32) { uint256 keyIndex = map._indexes[key]; require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key) return map._entries[keyIndex - 1]._value; // All indexes are 1-based } /** * @dev Same as {_get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {_tryGet}. */ function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) { uint256 keyIndex = map._indexes[key]; require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key) return map._entries[keyIndex - 1]._value; // All indexes are 1-based } // UintToAddressMap struct UintToAddressMap { Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) { return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) { return _remove(map._inner, bytes32(key)); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) { return _contains(map._inner, bytes32(key)); } /** * @dev Returns the number of elements in the map. O(1). */ function length(UintToAddressMap storage map) internal view returns (uint256) { return _length(map._inner); } /** * @dev Returns the element stored at position `index` in the set. O(1). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) { (bytes32 key, bytes32 value) = _at(map._inner, index); return (uint256(key), address(uint160(uint256(value)))); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. * * _Available since v3.4._ */ function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) { (bool success, bytes32 value) = _tryGet(map._inner, bytes32(key)); return (success, address(uint160(uint256(value)))); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(UintToAddressMap storage map, uint256 key) internal view returns (address) { return address(uint160(uint256(_get(map._inner, bytes32(key))))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) { return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage)))); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.7.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: LGPL-3.0-or-later pragma solidity 0.7.6; // Those are the payment methods we are using throughout the system. // Depending on how to user choose to interact with it's funds we store the method, so we could distribute its tokens afterwise enum PaymentMethod { ETHETH, ETHTKN, TKNETH, TKNTKN } enum Entity {ISSUER, HOLDER, POOL} enum VoucherState {FINAL, CANCEL_FAULT, COMPLAIN, EXPIRE, REFUND, REDEEM, COMMIT} /* Status of the voucher in 8 bits: [6:COMMITTED] [5:REDEEMED] [4:REFUNDED] [3:EXPIRED] [2:COMPLAINED] [1:CANCELORFAULT] [0:FINAL] */ enum Condition {NOT_SET, BALANCE, OWNERSHIP} //Describes what kind of condition must be met for a conditional commit struct ConditionalCommitInfo { uint256 conditionalTokenId; uint256 threshold; Condition condition; address gateAddress; bool registerConditionalCommit; } uint8 constant ONE = 1; struct VoucherDetails { uint256 tokenIdSupply; uint256 tokenIdVoucher; address issuer; address holder; uint256 price; uint256 depositSe; uint256 depositBu; PaymentMethod paymentMethod; VoucherStatus currStatus; } struct VoucherStatus { address seller; uint8 status; bool isPaymentReleased; bool isDepositsReleased; DepositsReleased depositReleased; uint256 complainPeriodStart; uint256 cancelFaultPeriodStart; } struct DepositsReleased { uint8 status; uint248 releasedAmount; } /** * @notice Based on its lifecycle, voucher can have many different statuses. Checks whether a voucher is in Committed state. * @param _status current status of a voucher. */ function isStateCommitted(uint8 _status) pure returns (bool) { return _status == determineStatus(0, VoucherState.COMMIT); } /** * @notice Based on its lifecycle, voucher can have many different statuses. Checks whether a voucher is in RedemptionSigned state. * @param _status current status of a voucher. */ function isStateRedemptionSigned(uint8 _status) pure returns (bool) { return _status == determineStatus(determineStatus(0, VoucherState.COMMIT), VoucherState.REDEEM); } /** * @notice Based on its lifecycle, voucher can have many different statuses. Checks whether a voucher is in Refunded state. * @param _status current status of a voucher. */ function isStateRefunded(uint8 _status) pure returns (bool) { return _status == determineStatus(determineStatus(0, VoucherState.COMMIT), VoucherState.REFUND); } /** * @notice Based on its lifecycle, voucher can have many different statuses. Checks whether a voucher is in Expired state. * @param _status current status of a voucher. */ function isStateExpired(uint8 _status) pure returns (bool) { return _status == determineStatus(determineStatus(0, VoucherState.COMMIT), VoucherState.EXPIRE); } /** * @notice Based on its lifecycle, voucher can have many different statuses. Checks the current status a voucher is at. * @param _status current status of a voucher. * @param _idx status to compare. */ function isStatus(uint8 _status, VoucherState _idx) pure returns (bool) { return (_status >> uint8(_idx)) & ONE == 1; } /** * @notice Set voucher status. * @param _status previous status. * @param _changeIdx next status. */ function determineStatus(uint8 _status, VoucherState _changeIdx) pure returns (uint8) { return _status | (ONE << uint8(_changeIdx)); }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"string","name":"baseURI_","type":"string"},{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"address","name":"_cashierAddress","type":"address"},{"internalType":"address","name":"_voucherKernelAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_newCashier","type":"address"},{"indexed":false,"internalType":"address","name":"_triggeredBy","type":"address"}],"name":"LogCashierSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"_contractUri","type":"string"},{"indexed":false,"internalType":"address","name":"_triggeredBy","type":"address"}],"name":"LogContractUriSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"_newUri","type":"string"},{"indexed":false,"internalType":"address","name":"_triggeredBy","type":"address"}],"name":"LogUriSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_newVoucherKernel","type":"address"},{"indexed":false,"internalType":"address","name":"_triggeredBy","type":"address"}],"name":"LogVoucherKernelSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contractURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCashierAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVoucherKernelAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"mint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_cashierAddress","type":"address"}],"name":"setCashierAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_contractUri","type":"string"}],"name":"setContractUri","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_newUri","type":"string"}],"name":"setTokenURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_voucherKernelAddress","type":"address"}],"name":"setVoucherKernelAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : baseURI_ (string): https://metadata.bosonprotocol.io/vouchers/
Arg [1] : name_ (string): Boson Smart Voucher
Arg [2] : symbol_ (string): BSV
Arg [3] : _cashierAddress (address): 0x244154F58e9Bf6C15c3a09846eFB7bEcFe92A880
Arg [4] : _voucherKernelAddress (address): 0x19c10A47C9356eFD0E4377411Db627636Ee9E3C6
-----Encoded View---------------
12 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [3] : 000000000000000000000000244154f58e9bf6c15c3a09846efb7becfe92a880
Arg [4] : 00000000000000000000000019c10a47c9356efd0e4377411db627636ee9e3c6
Arg [5] : 000000000000000000000000000000000000000000000000000000000000002b
Arg [6] : 68747470733a2f2f6d657461646174612e626f736f6e70726f746f636f6c2e69
Arg [7] : 6f2f766f7563686572732f000000000000000000000000000000000000000000
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000013
Arg [9] : 426f736f6e20536d61727420566f756368657200000000000000000000000000
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [11] : 4253560000000000000000000000000000000000000000000000000000000000
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.