ERC-20
Overview
Max Total Supply
115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564,039,457.584007913129639935 NOXSHA-0
Holders
4
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Minimal Proxy Contract for 0x973e69303259b0c2543a38665122b773d28405fb
Contract Name:
ERC20Template
Compiler Version
v0.8.12+commit.f00d7308
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity 0.8.12; // Copyright BigchainDB GmbH and Ocean Protocol contributors // SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) // Code is Apache-2.0 and docs are CC-BY-4.0 import "../interfaces/IERC721Template.sol"; import "../interfaces/IERC20Template.sol"; import "../interfaces/IFactoryRouter.sol"; import "../interfaces/IFixedRateExchange.sol"; import "../interfaces/IDispenser.sol"; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/utils/math/SafeMath.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "../utils/ERC20Roles.sol"; /** * @title DatatokenTemplate * * @dev DatatokenTemplate is an ERC20 compliant token template * Used by the factory contract as a bytecode reference to * deploy new Datatokens. */ contract ERC20Template is ERC20("test", "testSymbol"), ERC20Roles, ERC20Burnable, ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IERC20; string private _name; string private _symbol; uint256 private _cap; uint8 private constant _decimals = 18; bool private initialized = false; address private _erc721Address; address private paymentCollector; address private publishMarketFeeAddress; address private publishMarketFeeToken; uint256 private publishMarketFeeAmount; uint256 public constant BASE = 1e18; // EIP 2612 SUPPORT bytes32 public DOMAIN_SEPARATOR; // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; mapping(address => uint256) public nonces; address public router; address[] deployedPools; struct fixedRate{ address contractAddress; bytes32 id; } fixedRate[] fixedRateExchanges; address[] dispensers; struct providerFee{ address providerFeeAddress; address providerFeeToken; // address of the token uint256 providerFeeAmount; // amount to be transfered to provider uint8 v; // v of provider signed message bytes32 r; // r of provider signed message bytes32 s; // s of provider signed message uint256 validUntil; //validity expresses in unix timestamp bytes providerData; //data encoded by provider } struct consumeMarketFee{ address consumeMarketFeeAddress; address consumeMarketFeeToken; // address of the token marketplace wants to add fee on top uint256 consumeMarketFeeAmount; // amount to be transfered to marketFeeCollector } event OrderStarted( address indexed consumer, address payer, uint256 amount, uint256 serviceIndex, uint256 timestamp, address indexed publishMarketAddress, uint256 blockNumber ); event OrderReused( bytes32 orderTxId, address caller, uint256 timestamp, uint256 number ); event OrderExecuted( address indexed providerAddress, address indexed consumerAddress, bytes32 orderTxId, bytes providerData, bytes providerSignature, bytes consumerData, bytes consumerSignature, uint256 timestamp, uint256 blockNumber ); event PublishMarketFeeChanged( address caller, address PublishMarketFeeAddress, address PublishMarketFeeToken, uint256 PublishMarketFeeAmount ); // emited for every order event PublishMarketFee( address indexed PublishMarketFeeAddress, address indexed PublishMarketFeeToken, uint256 PublishMarketFeeAmount ); // emited for every order event ConsumeMarketFee( address indexed consumeMarketFeeAddress, address indexed consumeMarketFeeToken, uint256 consumeMarketFeeAmount ); // emited for every order event ProviderFee( address indexed providerFeeAddress, address indexed providerFeeToken, uint256 providerFeeAmount, bytes providerData, uint8 v, bytes32 r, bytes32 s, uint256 validUntil ); event MinterProposed(address currentMinter, address newMinter); event MinterApproved(address currentMinter, address newMinter); event NewPool( address poolAddress, address ssContract, address baseTokenAddress ); event VestingCreated(address indexed datatokenAddress, address indexed publisherAddress, uint256 vestingEndBlock, uint256 totalVestingAmount); event NewFixedRate(bytes32 exchangeId, address indexed owner, address exchangeContract, address indexed baseToken); event NewDispenser(address dispenserContract); event NewPaymentCollector( address indexed caller, address indexed _newPaymentCollector, uint256 timestamp, uint256 blockNumber ); modifier onlyNotInitialized() { require( !initialized, "ERC20Template: token instance already initialized" ); _; } modifier onlyNFTOwner() { require( msg.sender == IERC721Template(_erc721Address).ownerOf(1), "ERC20Template: not NFTOwner" ); _; } modifier onlyPublishingMarketFeeAddress() { require( msg.sender == publishMarketFeeAddress, "ERC20Template: not publishMarketFeeAddress" ); _; } modifier onlyERC20Deployer() { require( IERC721Template(_erc721Address) .getPermissions(msg.sender) .deployERC20 || IERC721Template(_erc721Address).ownerOf(1) == msg.sender, "ERC20Template: NOT DEPLOYER ROLE" ); _; } /** * @dev initialize * Called prior contract initialization (e.g creating new Datatoken instance) * Calls private _initialize function. Only if contract is not initialized. * @param strings_ refers to an array of strings * [0] = name token * [1] = symbol * @param addresses_ refers to an array of addresses passed by user * [0] = minter account who can mint datatokens (can have multiple minters) * [1] = paymentCollector initial paymentCollector for this DT * [2] = publishing Market Address * [3] = publishing Market Fee Token * @param factoryAddresses_ refers to an array of addresses passed by the factory * [0] = erc721Address * [1] = router address * * @param uints_ refers to an array of uints * [0] = cap_ the total ERC20 cap * [1] = publishing Market Fee Amount * @param bytes_ refers to an array of bytes * Currently not used, usefull for future templates */ function initialize( string[] calldata strings_, address[] calldata addresses_, address[] calldata factoryAddresses_, uint256[] calldata uints_, bytes[] calldata bytes_ ) external onlyNotInitialized returns (bool) { return _initialize( strings_, addresses_, factoryAddresses_, uints_, bytes_ ); } /** * @dev _initialize * Private function called on contract initialization. * @param strings_ refers to an array of strings * [0] = name token * [1] = symbol * @param addresses_ refers to an array of addresses passed by user * [0] = minter account who can mint datatokens (can have multiple minters) * [1] = paymentCollector initial paymentCollector for this DT * [2] = publishing Market Address * [3] = publishing Market Fee Token * @param factoryAddresses_ refers to an array of addresses passed by the factory * [0] = erc721Address * [1] = router address * * @param uints_ refers to an array of uints * [0] = cap_ the total ERC20 cap * [1] = publishing Market Fee Amount * param bytes_ refers to an array of bytes * Currently not used, usefull for future templates */ function _initialize( string[] memory strings_, address[] memory addresses_, address[] memory factoryAddresses_, uint256[] memory uints_, bytes[] memory ) private returns (bool) { address erc721Address = factoryAddresses_[0]; router = factoryAddresses_[1]; require( erc721Address != address(0), "ERC20Template: Invalid minter, zero address" ); require( router != address(0), "ERC20Template: Invalid router, zero address" ); // require(uints_[0] != 0, "DatatokenTemplate: Invalid cap value"); // _cap = uints_[0]; _cap = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff; _name = strings_[0]; _symbol = strings_[1]; _erc721Address = erc721Address; initialized = true; // add a default minter, similar to what happens with manager in the 721 contract _addMinter(addresses_[0]); if (addresses_[1] != address(0)) { _setPaymentCollector(addresses_[1]); emit NewPaymentCollector( msg.sender, addresses_[1], block.timestamp, block.number ); } publishMarketFeeAddress = addresses_[2]; publishMarketFeeToken = addresses_[3]; publishMarketFeeAmount = uints_[1]; emit PublishMarketFeeChanged( msg.sender, publishMarketFeeAddress, publishMarketFeeToken, publishMarketFeeAmount ); uint256 chainId; assembly { chainId := chainid() } DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ), keccak256(bytes(_name)), keccak256(bytes("1")), // version, could be any other value chainId, address(this) ) ); return initialized; } /** * @dev deployPool * Function to deploy new Pool with 1SS. It also has a vesting schedule. * This function can only be called ONCE and ONLY if no token have been minted yet. * Requires baseToken approval * @param ssParams params for the ssContract. * [0] = rate (wei) * [1] = baseToken decimals * [2] = vesting amount (wei) * [3] = vested blocks * [4] = initial liquidity in baseToken for pool creation * @param swapFees swapFees (swapFee, swapMarketFee), swapOceanFee will be set automatically later * [0] = swapFee for LP Providers * [1] = swapFee for marketplace runner . * @param addresses refers to an array of addresses passed by user * [0] = side staking contract address * [1] = baseToken address for pool creation(OCEAN or other) * [2] = baseTokenSender user which will provide the baseToken amount for initial liquidity * [3] = publisherAddress user which will be assigned the vested amount * [4] = marketFeeCollector marketFeeCollector address [5] = poolTemplateAddress */ function deployPool( uint256[] memory ssParams, uint256[] memory swapFees, address[] memory addresses ) external onlyERC20Deployer nonReentrant returns (address pool) { require(totalSupply() == 0, "ERC20Template: tokens already minted"); _addMinter(addresses[0]); // TODO: confirm minimum number of blocks required require( ssParams[3] >= IFactoryRouter(router).getMinVestingPeriod(), "ERC20Template: Vesting period too low. See FactoryRouter.minVestingPeriodInBlocks" ); address[2] memory tokens = [address(this), addresses[1]]; pool = IFactoryRouter(router).deployPool( tokens, ssParams, swapFees, addresses ); deployedPools.push(pool); emit NewPool(pool, addresses[0], addresses[1]); } /** * @dev createFixedRate * Creates a new FixedRateExchange setup. * @param fixedPriceAddress fixedPriceAddress * @param addresses array of addresses [baseToken,owner,marketFeeCollector] * @param uints array of uints [baseTokenDecimals,datatokenDecimals, fixedRate, marketFee, withMint] * @return exchangeId */ function createFixedRate( address fixedPriceAddress, address[] memory addresses, uint256[] memory uints ) external onlyERC20Deployer nonReentrant returns (bytes32 exchangeId) { // add FixedPriced contract as minter if withMint == true if (uints[4] > 0) _addMinter(fixedPriceAddress); exchangeId = IFactoryRouter(router).deployFixedRate( fixedPriceAddress, addresses, uints ); emit NewFixedRate(exchangeId, addresses[1], fixedPriceAddress, addresses[0]); fixedRateExchanges.push(fixedRate(fixedPriceAddress,exchangeId)); } /** * @dev createDispenser * Creates a new Dispenser * @param _dispenser dispenser contract address * @param maxTokens - max tokens to dispense * @param maxBalance - max balance of requester. * @param withMint - true if we want to allow the dispenser to be a minter * @param allowedSwapper - only account that can ask tokens. set address(0) if not required */ function createDispenser( address _dispenser, uint256 maxTokens, uint256 maxBalance, bool withMint, address allowedSwapper ) external onlyERC20Deployer nonReentrant { // add FixedPriced contract as minter if withMint == true if (withMint) _addMinter(_dispenser); dispensers.push(_dispenser); emit NewDispenser(_dispenser); IFactoryRouter(router).deployDispenser( _dispenser, address(this), maxTokens, maxBalance, msg.sender, allowedSwapper ); } /** * @dev mint * Only the minter address can call it. * msg.value should be higher than zero and gt or eq minting fee * @param account refers to an address that token is going to be minted to. * @param value refers to amount of tokens that is going to be minted. */ function mint(address account, uint256 value) external { require(permissions[msg.sender].minter, "ERC20Template: NOT MINTER"); require( totalSupply().add(value) <= _cap, "DatatokenTemplate: cap exceeded" ); _mint(account, value); } /** * @dev _checkProviderFee * Checks if a providerFee structure is valid, signed and * transfers fee to providerAddress * @param _providerFee providerFee structure */ function _checkProviderFee(providerFee calldata _providerFee) internal{ // check if they are signed bytes memory prefix = "\x19Ethereum Signed Message:\n32"; bytes32 message = keccak256( abi.encodePacked(prefix, keccak256( abi.encodePacked( _providerFee.providerData, _providerFee.providerFeeAddress, _providerFee.providerFeeToken, _providerFee.providerFeeAmount, _providerFee.validUntil ) ) ) ); address signer = ecrecover(message, _providerFee.v, _providerFee.r, _providerFee.s); require(signer == _providerFee.providerFeeAddress, "Invalid provider fee"); emit ProviderFee( _providerFee.providerFeeAddress, _providerFee.providerFeeToken, _providerFee.providerFeeAmount, _providerFee.providerData, _providerFee.v, _providerFee.r, _providerFee.s, _providerFee.validUntil ); // skip fee if amount == 0 or feeToken == 0x0 address or feeAddress == 0x0 address // Requires approval for the providerFeeToken of providerFeeAmount if ( _providerFee.providerFeeAmount > 0 && _providerFee.providerFeeToken != address(0) && _providerFee.providerFeeAddress != address(0) ) { uint256 OPCFee = IFactoryRouter(router).getOPCProviderFee(); uint256 OPCcut = 0; if(OPCFee > 0) OPCcut = _providerFee.providerFeeAmount.mul(OPCFee).div(BASE); uint256 providerCut = _providerFee.providerFeeAmount.sub(OPCcut); _pullUnderlying(_providerFee.providerFeeToken,msg.sender, address(this), _providerFee.providerFeeAmount); IERC20(_providerFee.providerFeeToken).safeTransfer( _providerFee.providerFeeAddress, providerCut ); if(OPCcut > 0){ IERC20(_providerFee.providerFeeToken).safeTransfer( IFactoryRouter(router).getOPCCollector(), OPCcut ); } } } /** * @dev startOrder * called by payer or consumer prior ordering a service consume on a marketplace. * Requires previous approval of consumeFeeToken and publishMarketFeeToken * @param consumer is the consumer address (payer could be different address) * @param serviceIndex service index in the metadata * @param _providerFee provider fee * @param _consumeMarketFee consume market fee */ function startOrder( address consumer, uint256 serviceIndex, providerFee calldata _providerFee, consumeMarketFee calldata _consumeMarketFee ) external nonReentrant { uint256 amount = 1e18; // we always pay 1 DT. No more, no less require( balanceOf(msg.sender) >= amount, "Not enough datatokens to start Order" ); emit OrderStarted( consumer, msg.sender, amount, serviceIndex, block.timestamp, publishMarketFeeAddress, block.number ); // publishMarketFee // Requires approval for the publishMarketFeeToken of publishMarketFeeAmount // skip fee if amount == 0 or feeToken == 0x0 address or feeAddress == 0x0 address if ( publishMarketFeeAmount > 0 && publishMarketFeeToken != address(0) && publishMarketFeeAddress != address(0) ) { _pullUnderlying(publishMarketFeeToken,msg.sender, publishMarketFeeAddress, publishMarketFeeAmount); emit PublishMarketFee( publishMarketFeeAddress, publishMarketFeeToken, publishMarketFeeAmount ); } // consumeMarketFee // Requires approval for the FeeToken // skip fee if amount == 0 or feeToken == 0x0 address or feeAddress == 0x0 address if ( _consumeMarketFee.consumeMarketFeeAmount > 0 && _consumeMarketFee.consumeMarketFeeToken != address(0) && _consumeMarketFee.consumeMarketFeeAddress != address(0) ) { _pullUnderlying(_consumeMarketFee.consumeMarketFeeToken,msg.sender, _consumeMarketFee.consumeMarketFeeAddress, _consumeMarketFee.consumeMarketFeeAmount); emit ConsumeMarketFee( _consumeMarketFee.consumeMarketFeeAddress, _consumeMarketFee.consumeMarketFeeToken, _consumeMarketFee.consumeMarketFeeAmount ); } _checkProviderFee(_providerFee); uint256 OPCFee = IFactoryRouter(router).getOPCConsumeFee(); // send datatoken to publisher require( transfer(getPaymentCollector(), amount.sub(OPCFee)), "Failed to send DT to publisher" ); require( transfer(IFactoryRouter(router).getOPCCollector(), OPCFee), "Failed to send DT to OPC" ); } /** * @dev reuseOrder * called by payer or consumer having a valid order, but with expired provider access * Pays the provider fee again, but it will not require a new datatoken payment * Requires previous approval of provider fee. * @param orderTxId previous valid order * @param _providerFee provider feee */ function reuseOrder( bytes32 orderTxId, providerFee calldata _providerFee ) external nonReentrant { emit OrderReused( orderTxId, msg.sender, block.timestamp, block.number ); _checkProviderFee(_providerFee); } /** * @dev addMinter * Only ERC20Deployer (at 721 level) can update. * There can be multiple minters * @param _minter new minter address */ function addMinter(address _minter) external onlyERC20Deployer { _addMinter(_minter); } /** * @dev removeMinter * Only ERC20Deployer (at 721 level) can update. * There can be multiple minters * @param _minter minter address to remove */ function removeMinter(address _minter) external onlyERC20Deployer { _removeMinter(_minter); } /** * @dev addPaymentManager (can set who's going to collect fee when consuming orders) * Only ERC20Deployer (at 721 level) can update. * There can be multiple paymentCollectors * @param _paymentManager new minter address */ function addPaymentManager(address _paymentManager) external onlyERC20Deployer { _addPaymentManager(_paymentManager); } /** * @dev removePaymentManager * Only ERC20Deployer (at 721 level) can update. * There can be multiple paymentManagers * @param _paymentManager _paymentManager address to remove */ function removePaymentManager(address _paymentManager) external onlyERC20Deployer { _removePaymentManager(_paymentManager); } /** * @dev setData * Only ERC20Deployer (at 721 level) can call it. * This function allows to store data with a preset key (keccak256(ERC20Address)) into NFT 725 Store * @param _value data to be set with this key */ function setData(bytes calldata _value) external onlyERC20Deployer { bytes32 key = keccak256(abi.encodePacked(address(this))); IERC721Template(_erc721Address).setDataERC20(key, _value); } /** * @dev cleanPermissions() * Only NFT Owner (at 721 level) can call it. * This function allows to remove all minters, feeManagers and reset the paymentCollector * */ function cleanPermissions() external onlyNFTOwner { _internalCleanPermissions(); } /** * @dev cleanFrom721() * OnlyNFT(721) Contract can call it. * This function allows to remove all minters, feeManagers and reset the paymentCollector * This function is used when transferring an NFT to a new owner, * so that permissions at ERC20level (minter,feeManager,paymentCollector) can be reset. * */ function cleanFrom721() external { require( msg.sender == _erc721Address, "ERC20Template: NOT 721 Contract" ); _internalCleanPermissions(); } function _internalCleanPermissions() internal { uint256 totalLen = fixedRateExchanges.length + dispensers.length; uint256 curentLen = 0; address[] memory previousMinters=new address[](totalLen); // loop though fixedrates, empty and preserve the minter rols if exists uint256 i; for(i=0; i<fixedRateExchanges.length; i++) { IFixedRateExchange fre = IFixedRateExchange(fixedRateExchanges[i].contractAddress); ( , , , , , , , , , uint256 dtBalance, uint256 btBalance, bool withMint ) = fre.getExchange(fixedRateExchanges[i].id); if(btBalance>0) fre.collectBT(fixedRateExchanges[i].id, btBalance); if(dtBalance>0) fre.collectDT(fixedRateExchanges[i].id, dtBalance); // add it to the list of minters if(isMinter(fixedRateExchanges[i].contractAddress) && withMint == true){ previousMinters[curentLen]=fixedRateExchanges[i].contractAddress; curentLen++; } } // loop though dispenser and preserve the minter rols if exists for(i=0; i<dispensers.length; i++) { IDispenser(dispensers[i]).ownerWithdraw(address(this)); if(isMinter(dispensers[i])){ previousMinters[curentLen]=dispensers[i]; curentLen++; } } // clear all permisions _cleanPermissions(); // set collector to 0 paymentCollector = address(0); // add existing minter roles for fixedrate & dispensers for(i=0; i<curentLen; i++) { _addMinter(previousMinters[i]); } } /** * @dev setPaymentCollector * Only feeManager can call it * This function allows to set a newPaymentCollector (receives DT when consuming) If not set the paymentCollector is the NFT Owner * @param _newPaymentCollector new fee collector */ function setPaymentCollector(address _newPaymentCollector) external { //we allow _newPaymentCollector = address(0), because it means that the collector is nft owner require( permissions[msg.sender].paymentManager || IERC721Template(_erc721Address).getPermissions(msg.sender).deployERC20 || IERC721Template(_erc721Address).ownerOf(1)==msg.sender, "ERC20Template: NOT PAYMENT MANAGER or OWNER" ); _setPaymentCollector(_newPaymentCollector); emit NewPaymentCollector( msg.sender, _newPaymentCollector, block.timestamp, block.number ); } /** * @dev _setPaymentCollector * @param _newPaymentCollector new fee collector */ function _setPaymentCollector(address _newPaymentCollector) internal { paymentCollector = _newPaymentCollector; } /** * @dev getPublishingMarketFee * Get publishingMarket Fee * This function allows to get the current fee set by the publishing market */ function getPublishingMarketFee() external view returns ( address, address, uint256 ) { return ( publishMarketFeeAddress, publishMarketFeeToken, publishMarketFeeAmount ); } /** * @dev setPublishingMarketFee * Only publishMarketFeeAddress can call it * This function allows to set the fee required by the publisherMarket * @param _publishMarketFeeAddress new _publishMarketFeeAddress * @param _publishMarketFeeToken new _publishMarketFeeToken * @param _publishMarketFeeAmount new fee amount */ function setPublishingMarketFee( address _publishMarketFeeAddress, address _publishMarketFeeToken, uint256 _publishMarketFeeAmount ) external onlyPublishingMarketFeeAddress { require( _publishMarketFeeAddress != address(0), "Invalid _publishMarketFeeAddress address" ); require( _publishMarketFeeToken != address(0), "Invalid _publishMarketFeeToken address" ); publishMarketFeeAddress = _publishMarketFeeAddress; publishMarketFeeToken = _publishMarketFeeToken; publishMarketFeeAmount = _publishMarketFeeAmount; emit PublishMarketFeeChanged( msg.sender, _publishMarketFeeAddress, _publishMarketFeeToken, _publishMarketFeeAmount ); } /** * @dev getId * Return template id in case we need different ABIs. * If you construct your own template, please make sure to change the hardcoded value */ function getId() pure public returns (uint8) { return 1; } /** * @dev name * It returns the token name. * @return Datatoken name. */ function name() public view override returns (string memory) { return _name; } /** * @dev symbol * It returns the token symbol. * @return Datatoken symbol. */ function symbol() public view override returns (string memory) { return _symbol; } /** * @dev getERC721Address * It returns the parent ERC721 * @return ERC721 address. */ function getERC721Address() public view returns (address) { return _erc721Address; } /** * @dev decimals * It returns the token decimals. * how many supported decimal points * @return Datatoken decimals. */ function decimals() public pure override returns (uint8) { return _decimals; } /** * @dev cap * it returns the capital. * @return Datatoken cap. */ function cap() external view returns (uint256) { return _cap; } /** * @dev isInitialized * It checks whether the contract is initialized. * @return true if the contract is initialized. */ function isInitialized() external view returns (bool) { return initialized; } /** * @dev permit * used for signed approvals, see ERC20Template test for more details * @param owner user who signed the message * @param spender spender * @param value token amount * @param deadline deadline after which signed message is no more valid * @param v parameters from signed message * @param r parameters from signed message * @param s parameters from signed message */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external { require(deadline >= block.number, "ERC20DT: EXPIRED"); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256( abi.encode( PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline ) ) ) ); address recoveredAddress = ecrecover(digest, v, r, s); require( recoveredAddress != address(0) && recoveredAddress == owner, "ERC20DT: INVALID_SIGNATURE" ); _approve(owner, spender, value); } /** * @dev getAddressLength * It returns the array lentgh @param array address array we want to get length * @return length */ function getAddressLength(address[] memory array) private pure returns (uint256) { return array.length; } /** * @dev getUintLength * It returns the array lentgh @param array uint array we want to get length * @return length */ function getUintLength(uint256[] memory array) private pure returns (uint256) { return array.length; } /** * @dev getBytesLength * It returns the array lentgh @param array bytes32 array we want to get length * @return length */ function getBytesLength(bytes32[] memory array) private pure returns (uint256) { return array.length; } /** * @dev getPaymentCollector * It returns the current paymentCollector * @return paymentCollector address */ function getPaymentCollector() public view returns (address) { if (paymentCollector == address(0)) { return IERC721Template(_erc721Address).ownerOf(1); } else { return paymentCollector; } } /** * @dev fallback function * this is a default fallback function in which receives * the collected ether. */ fallback() external payable {} /** * @dev receive function * this is a default receive function in which receives * the collected ether. */ receive() external payable {} /** * @dev withdrawETH * transfers all the accumlated ether the collector account */ function withdrawETH() external payable { payable(getPaymentCollector()).transfer(address(this).balance); } /** * @dev isERC20Deployer * returns true if address has deployERC20 role */ function isERC20Deployer(address user) public view returns(bool){ return(IERC721Template(_erc721Address).getPermissions(user).deployERC20); } /** * @dev getPools * Returns the list of pools created for this datatoken */ function getPools() public view returns(address[] memory) { return(deployedPools); } /** * @dev getFixedRates * Returns the list of fixedRateExchanges created for this datatoken */ function getFixedRates() public view returns(fixedRate[] memory) { return(fixedRateExchanges); } /** * @dev getDispensers * Returns the list of dispensers created for this datatoken */ function getDispensers() public view returns(address[] memory) { return(dispensers); } function _pullUnderlying( address erc20, address from, address to, uint256 amount ) internal { uint256 balanceBefore = IERC20(erc20).balanceOf(to); IERC20(erc20).safeTransferFrom(from, to, amount); require(IERC20(erc20).balanceOf(to) >= balanceBefore.add(amount), "Transfer amount is too low"); } /** * @dev orderExecuted * Providers should call this to prove order execution * @param orderTxId order tx * @param providerData provider data * @param providerSignature provider signature * @param consumerData consumer data * @param consumerSignature consumer signature * @param consumerAddress consumer address */ function orderExecuted( bytes32 orderTxId, bytes calldata providerData, bytes calldata providerSignature, bytes calldata consumerData, bytes calldata consumerSignature, address consumerAddress ) external { require(msg.sender != consumerAddress, "Provider cannot be the consumer"); bytes memory prefix = "\x19Ethereum Signed Message:\n32"; bytes32 providerHash = keccak256( abi.encodePacked(prefix, keccak256( abi.encodePacked( orderTxId, providerData ) ) ) ); require(_ecrecovery(providerHash, providerSignature) == msg.sender, "Provider signature check failed"); bytes32 consumerHash = keccak256( abi.encodePacked(prefix, keccak256( abi.encodePacked( consumerData ) ) ) ); require(_ecrecovery(consumerHash, consumerSignature) == consumerAddress, "Consumer signature check failed"); emit OrderExecuted(msg.sender, consumerAddress ,orderTxId, providerData, providerSignature, consumerData, consumerSignature, block.timestamp, block.number); } function _ecrecovery(bytes32 hash, bytes memory sig) pure internal returns (address) { bytes32 r; bytes32 s; uint8 v; if (sig.length != 65) { return address(0); } assembly { r := mload(add(sig, 32)) s := mload(add(sig, 64)) v := and(mload(add(sig, 65)), 255) } if (v < 27) { v += 27; } if (v != 27 && v != 28) { return address(0); } return ecrecover(hash, v, r, s); } }
pragma solidity 0.8.12; // Copyright BigchainDB GmbH and Ocean Protocol contributors // SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) // Code is Apache-2.0 and docs are CC-BY-4.0 /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721Template { enum RolesType { Manager, DeployERC20, UpdateMetadata, Store } /** * @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 ); event MetadataCreated( address indexed createdBy, uint8 state, string decryptorUrl, bytes flags, bytes data, string metaDataDecryptorAddress, uint256 timestamp, uint256 blockNumber ); event MetadataUpdated( address indexed updatedBy, uint8 state, string decryptorUrl, bytes flags, bytes data, string metaDataDecryptorAddress, uint256 timestamp, uint256 blockNumber ); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); function name() external view returns (string memory); function symbol() external view returns (string memory); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); function isERC20Deployer(address acount) external view returns (bool); /** * @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; function transferFrom(address from, address to) external; function initialize( address admin, string calldata name, string calldata symbol, address erc20Factory, address additionalERC20Deployer, address additionalMetaDataUpdater, string calldata tokenURI, bool transferable ) external returns (bool); struct Roles { bool manager; bool deployERC20; bool updateMetadata; bool store; } struct metaDataProof { address validatorAddress; uint8 v; // v of validator signed message bytes32 r; // r of validator signed message bytes32 s; // s of validator signed message } function getPermissions(address user) external view returns (Roles memory); function setDataERC20(bytes32 _key, bytes calldata _value) external; function setMetaData(uint8 _metaDataState, string calldata _metaDataDecryptorUrl , string calldata _metaDataDecryptorAddress, bytes calldata flags, bytes calldata data,bytes32 _metaDataHash, metaDataProof[] memory _metadataProofs) external; function getMetaData() external view returns (string memory, string memory, uint8, bool); function createERC20( uint256 _templateIndex, string[] calldata strings, address[] calldata addresses, uint256[] calldata uints, bytes[] calldata bytess ) external returns (address); function removeFromCreateERC20List(address _allowedAddress) external; function addToCreateERC20List(address _allowedAddress) external; function addToMetadataList(address _allowedAddress) external; function removeFromMetadataList(address _allowedAddress) external; function getId() pure external returns (uint8); }
pragma solidity 0.8.12; // Copyright BigchainDB GmbH and Ocean Protocol contributors // SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) // Code is Apache-2.0 and docs are CC-BY-4.0 interface IERC20Template { struct RolesERC20 { bool minter; bool feeManager; } struct providerFee{ address providerFeeAddress; address providerFeeToken; // address of the token marketplace wants to add fee on top uint256 providerFeeAmount; // amount to be transfered to marketFeeCollector uint8 v; // v of provider signed message bytes32 r; // r of provider signed message bytes32 s; // s of provider signed message uint256 validUntil; //validity expresses in unix timestamp bytes providerData; //data encoded by provider } struct consumeMarketFee{ address consumeMarketFeeAddress; address consumeMarketFeeToken; // address of the token marketplace wants to add fee on top uint256 consumeMarketFeeAmount; // amount to be transfered to marketFeeCollector } function initialize( string[] calldata strings_, address[] calldata addresses_, address[] calldata factoryAddresses_, uint256[] calldata uints_, bytes[] calldata bytes_ ) external returns (bool); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint256); function cap() external view returns (uint256); function balanceOf(address owner) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 value) external returns (bool); function transfer(address to, uint256 value) external returns (bool); function transferFrom( address from, address to, uint256 value ) external returns (bool); function mint(address account, uint256 value) external; function isMinter(address account) external view returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint256); function permissions(address user) external view returns (RolesERC20 memory); function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; function cleanFrom721() external; function deployPool( uint256[] memory ssParams, uint256[] memory swapFees, address[] memory addresses ) external returns (address); function createFixedRate( address fixedPriceAddress, address[] memory addresses, uint[] memory uints ) external returns (bytes32); function createDispenser( address _dispenser, uint256 maxTokens, uint256 maxBalance, bool withMint, address allowedSwapper) external; function getPublishingMarketFee() external view returns (address , address, uint256); function setPublishingMarketFee( address _publishMarketFeeAddress, address _publishMarketFeeToken, uint256 _publishMarketFeeAmount ) external; function startOrder( address consumer, uint256 serviceIndex, providerFee calldata _providerFee, consumeMarketFee calldata _consumeMarketFee ) external; function reuseOrder( bytes32 orderTxId, providerFee calldata _providerFee ) external; function burn(uint256 amount) external; function burnFrom(address account, uint256 amount) external; function getERC721Address() external view returns (address); function isERC20Deployer(address user) external view returns(bool); function getPools() external view returns(address[] memory); struct fixedRate{ address contractAddress; bytes32 id; } function getFixedRates() external view returns(fixedRate[] memory); function getDispensers() external view returns(address[] memory); function getId() pure external returns (uint8); function getPaymentCollector() external view returns (address); }
pragma solidity 0.8.12; // Copyright BigchainDB GmbH and Ocean Protocol contributors // SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) // Code is Apache-2.0 and docs are CC-BY-4.0 interface IFactoryRouter { function deployPool( address[2] calldata tokens, // [datatokenAddress, baseTokenAddress] uint256[] calldata ssParams, uint256[] calldata swapFees, address[] calldata addresses ) external returns (address); function deployFixedRate( address fixedPriceAddress, address[] calldata addresses, uint256[] calldata uints ) external returns (bytes32 exchangeId); function getOPCFee(address baseToken) external view returns (uint256); function getOPCFees() external view returns (uint256,uint256); function getOPCConsumeFee() external view returns (uint256); function getOPCProviderFee() external view returns (uint256); function getMinVestingPeriod() external view returns (uint256); function deployDispenser( address _dispenser, address datatoken, uint256 maxTokens, uint256 maxBalance, address owner, address allowedSwapper ) external; function isApprovedToken(address) external view returns(bool); function getApprovedTokens() external view returns(address[] memory); function isSSContract(address) external view returns(bool); function getSSContracts() external view returns(address[] memory); function isFixedRateContract(address) external view returns(bool); function getFixedRatesContracts() external view returns(address[] memory); function isDispenserContract(address) external view returns(bool); function getDispensersContracts() external view returns(address[] memory); function isPoolTemplate(address) external view returns(bool); function getPoolTemplates() external view returns(address[] memory); struct Stakes { address poolAddress; uint256 tokenAmountIn; uint256 minPoolAmountOut; } function stakeBatch(Stakes[] calldata) external; enum operationType { SwapExactIn, SwapExactOut, FixedRate, Dispenser } struct Operations { bytes32 exchangeIds; // used for fixedRate or dispenser address source; // pool, dispenser or fixed rate address operationType operation; // type of operation: enum operationType address tokenIn; // token in address, only for pools uint256 amountsIn; // ExactAmount In for swapExactIn operation, maxAmount In for swapExactOut address tokenOut; // token out address, only for pools uint256 amountsOut; // minAmountOut for swapExactIn or exactAmountOut for swapExactOut uint256 maxPrice; // maxPrice, only for pools uint256 swapMarketFee; address marketFeeAddress; } function buyDTBatch(Operations[] calldata) external; function updateOPCCollector(address _opcCollector) external; function getOPCCollector() view external returns (address); }
pragma solidity 0.8.12; // Copyright BigchainDB GmbH and Ocean Protocol contributors // SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) // Code is Apache-2.0 and docs are CC-BY-4.0 interface IFixedRateExchange { function createWithDecimals( address datatoken, address[] calldata addresses, // [baseToken,owner,marketFeeCollector] uint256[] calldata uints // [baseTokenDecimals,datatokenDecimals, fixedRate, marketFee] ) external returns (bytes32 exchangeId); function buyDT(bytes32 exchangeId, uint256 datatokenAmount, uint256 maxBaseTokenAmount, address consumeMarketAddress, uint256 consumeMarketSwapFeeAmount) external; function sellDT(bytes32 exchangeId, uint256 datatokenAmount, uint256 minBaseTokenAmount, address consumeMarketAddress, uint256 consumeMarketSwapFeeAmount) external; function getAllowedSwapper(bytes32 exchangeId) external view returns (address allowedSwapper); function getExchange(bytes32 exchangeId) external view returns ( address exchangeOwner, address datatoken, uint256 dtDecimals, address baseToken, uint256 btDecimals, uint256 fixedRate, bool active, uint256 dtSupply, uint256 btSupply, uint256 dtBalance, uint256 btBalance, bool withMint //address allowedSwapper ); function getFeesInfo(bytes32 exchangeId) external view returns ( uint256 marketFee, address marketFeeCollector, uint256 opcFee, uint256 marketFeeAvailable, uint256 oceanFeeAvailable ); function isActive(bytes32 exchangeId) external view returns (bool); function calcBaseInGivenOutDT(bytes32 exchangeId, uint256 datatokenAmount, uint256 consumeMarketSwapFeeAmount) external view returns ( uint256 baseTokenAmount, uint256 oceanFeeAmount, uint256 publishMarketFeeAmount, uint256 consumeMarketFeeAmount ); function calcBaseOutGivenInDT(bytes32 exchangeId, uint256 datatokenAmount, uint256 consumeMarketSwapFeeAmount) external view returns ( uint256 baseTokenAmount, uint256 oceanFeeAmount, uint256 publishMarketFeeAmount, uint256 consumeMarketFeeAmount ); function updateMarketFee(bytes32 exchangeId, uint256 _newMarketFee) external; function updateMarketFeeCollector(bytes32 exchangeId, address _newMarketCollector) external; function setAllowedSwapper(bytes32 exchangeId, address newAllowedSwapper) external; function getId() pure external returns (uint8); function collectBT(bytes32 exchangeId, uint256 amount) external; function collectDT(bytes32 exchangeId, uint256 amount) external; }
pragma solidity 0.8.12; // Copyright BigchainDB GmbH and Ocean Protocol contributors // SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) // Code is Apache-2.0 and docs are CC-BY-4.0 interface IDispenser { function status(address datatoken) external view returns ( bool active, address owner, bool isMinter, uint256 maxTokens, uint256 maxBalance, uint256 balance, address allowedSwapper ); function create( address datatoken,uint256 maxTokens, uint256 maxBalance, address owner, address allowedSwapper) external; function activate(address datatoken,uint256 maxTokens, uint256 maxBalance) external; function deactivate(address datatoken) external; function dispense(address datatoken, uint256 amount, address destination) external payable; function ownerWithdraw(address datatoken) external; function setAllowedSwapper(address datatoken, address newAllowedSwapper) external; function getId() pure external returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, _allowances[owner][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = _allowances[owner][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; } _balances[to] += amount; emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Spend `amount` form the allowance of `owner` toward `spender`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol) pragma solidity ^0.8.0; import "../ERC20.sol"; import "../../../utils/Context.sol"; /** * @dev Extension of {ERC20} that allows token holders to destroy both their own * tokens and those that they have an allowance for, in a way that can be * recognized off-chain (via event analysis). */ abstract contract ERC20Burnable is Context, ERC20 { /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { _spendAllowance(account, _msgSender(), amount); _burn(account, amount); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol) pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
pragma solidity 0.8.12; // Copyright BigchainDB GmbH and Ocean Protocol contributors // SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0) // Code is Apache-2.0 and docs are CC-BY-4.0 contract ERC20Roles { mapping(address => RolesERC20) public permissions; address[] public authERC20; struct RolesERC20 { bool minter; bool paymentManager; } event AddedMinter( address indexed user, address indexed signer, uint256 timestamp, uint256 blockNumber ); event RemovedMinter( address indexed user, address indexed signer, uint256 timestamp, uint256 blockNumber ); /** * @dev getPermissions * Returns list of roles for an user * @param user user address */ function getPermissions(address user) public view returns (RolesERC20 memory) { return permissions[user]; } /** * @dev isMinter * Check if an address has the minter role * @param account refers to an address that is checked */ function isMinter(address account) public view returns (bool) { return (permissions[account].minter); } /** * @dev _addMinter * Internal function to add minter role to an user. * @param _minter user address */ function _addMinter(address _minter) internal { if(_minter != address(0)){ RolesERC20 storage user = permissions[_minter]; require(user.minter == false, "ERC20Roles: ALREADY A MINTER"); user.minter = true; _pushToAuthERC20(_minter); emit AddedMinter(_minter,msg.sender,block.timestamp,block.number); } } /** * @dev _removeMinter * Internal function to remove minter role from an user. * @param _minter user address */ function _removeMinter(address _minter) internal { RolesERC20 storage user = permissions[_minter]; user.minter = false; emit RemovedMinter(_minter,msg.sender,block.timestamp,block.number); _SafeRemoveFromAuthERC20(_minter); } event AddedPaymentManager( address indexed user, address indexed signer, uint256 timestamp, uint256 blockNumber ); event RemovedPaymentManager( address indexed user, address indexed signer, uint256 timestamp, uint256 blockNumber ); /** * @dev _addPaymentManager * Internal function to add paymentManager role to an user. * @param _paymentCollector user address */ function _addPaymentManager(address _paymentCollector) internal { if(_paymentCollector != address(0)){ RolesERC20 storage user = permissions[_paymentCollector]; require(user.paymentManager == false, "ERC20Roles: ALREADY A FEE MANAGER"); user.paymentManager = true; _pushToAuthERC20(_paymentCollector); emit AddedPaymentManager(_paymentCollector,msg.sender,block.timestamp,block.number); } } /** * @dev _removePaymentManager * Internal function to remove paymentManager role from an user. * @param _paymentCollector user address */ function _removePaymentManager(address _paymentCollector) internal { RolesERC20 storage user = permissions[_paymentCollector]; user.paymentManager = false; emit RemovedPaymentManager(_paymentCollector,msg.sender,block.timestamp,block.number); _SafeRemoveFromAuthERC20(_paymentCollector); } event CleanedPermissions( address indexed signer, uint256 timestamp, uint256 blockNumber ); function _cleanPermissions() internal { for (uint256 i = 0; i < authERC20.length; i++) { RolesERC20 storage user = permissions[authERC20[i]]; user.minter = false; user.paymentManager = false; } delete authERC20; emit CleanedPermissions(msg.sender,block.timestamp,block.number); } /** * @dev _pushToAuthERC20 * Checks authERC20 array and adds the user address if does not exists * @param user address to be checked */ function _pushToAuthERC20(address user) internal { uint256 i; for (i = 0; i < authERC20.length; i++) { if(authERC20[i] == user) break; } if(i == authERC20.length){ // element was not found authERC20.push(user); } } /** * @dev _SafeRemoveFromAuthERC20 * Checks if user has any roles left, and if not, it will remove it from auth array * @param user address to be checked and removed */ function _SafeRemoveFromAuthERC20(address user) internal { RolesERC20 storage userRoles = permissions[user]; if (userRoles.minter == false && userRoles.paymentManager == false ){ uint256 i; for (i = 0; i < authERC20.length; i++) { if(authERC20[i] == user) break; } if(i < authERC20.length){ authERC20[i] = authERC20[authERC20.length -1]; authERC20.pop(); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @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 * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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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.