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Top 10 Examples of "0x in functional component" in JavaScript

Dive into secure and efficient coding practices with our curated list of the top 10 examples showcasing '0x' in functional components in JavaScript. Our advanced machine learning engine meticulously scans each line of code, cross-referencing millions of open source libraries to ensure your implementation is not just functional, but also robust and secure. Elevate your React applications to new heights by mastering the art of handling side effects, API calls, and asynchronous operations with confidence and precision.

chainId: number;
}

interface ItemByChainId {
    [chainId: string]: T;
}

enum RequestedAssetType {
    ETH = 'ETH', // tslint:disable-line:enum-naming
    WETH = 'WETH', // tslint:disable-line:enum-naming
    ZRX = 'ZRX', // tslint:disable-line:enum-naming
}

const FIVE_DAYS_IN_MS = 4.32e8; // TODO: make this configurable
const NULL_ADDRESS = '0x0000000000000000000000000000000000000000';
const ZERO = new BigNumber(0);
const ASSET_AMOUNT = new BigNumber(0.1);

export class Handler {
    private readonly _chainConfigByChainId: ItemByChainId = {};
    private static _createProviderEngine(rpcUrl: string): Web3ProviderEngine {
        if (configs.DISPENSER_PRIVATE_KEY === undefined) {
            throw new Error('Dispenser Private key not found');
        }
        const engine = new Web3ProviderEngine();
        engine.addProvider(new NonceTrackerSubprovider());
        engine.addProvider(new PrivateKeyWalletSubprovider(configs.DISPENSER_PRIVATE_KEY));
        engine.addProvider(new RPCSubprovider(rpcUrl));
        engine.start();
        return engine;
    }
    constructor() {
const contractAddresses = getContractAddressesForChainOrThrow(chainConfig.chainId);
        const order: Order = {
            makerAddress: configs.DISPENSER_ADDRESS,
            takerAddress: req.params.recipient as string,
            makerFee: ZERO,
            takerFee: ZERO,
            makerAssetAmount,
            takerAssetAmount,
            makerAssetData,
            takerAssetData,
            salt: generatePseudoRandomSalt(),
            makerFeeAssetData: makerAssetData,
            takerFeeAssetData: takerAssetData,
            feeRecipientAddress: NULL_ADDRESS,
            senderAddress: NULL_ADDRESS,
            expirationTimeSeconds: new BigNumber(Date.now() + FIVE_DAYS_IN_MS)
                // tslint:disable-next-line:custom-no-magic-numbers
                .div(1000)
                .integerValue(BigNumber.ROUND_FLOOR),
            exchangeAddress: contractAddresses.exchange,
            chainId: chainConfig.chainId,
        };
        const orderHash = orderHashUtils.getOrderHashHex(order);
        const signature = await signatureUtils.ecSignHashAsync(
            chainConfig.web3Wrapper.getProvider(),
            orderHash,
            configs.DISPENSER_ADDRESS,
        );
        const signedOrder: SignedOrder = {
            ...order,
            signature,
        };
const makerAssetAmount = Web3Wrapper.toBaseUnitAmount(ASSET_AMOUNT, makerTokenIfExists.decimals);
        const takerAssetAmount = Web3Wrapper.toBaseUnitAmount(ASSET_AMOUNT, takerTokenIfExists.decimals);
        const makerAssetData = assetDataUtils.encodeERC20AssetData(makerTokenIfExists.address);
        const takerAssetData = assetDataUtils.encodeERC20AssetData(takerTokenIfExists.address);
        const contractAddresses = getContractAddressesForChainOrThrow(chainConfig.chainId);
        const order: Order = {
            makerAddress: configs.DISPENSER_ADDRESS,
            takerAddress: req.params.recipient as string,
            makerFee: ZERO,
            takerFee: ZERO,
            makerAssetAmount,
            takerAssetAmount,
            makerAssetData,
            takerAssetData,
            salt: generatePseudoRandomSalt(),
            makerFeeAssetData: makerAssetData,
            takerFeeAssetData: takerAssetData,
            feeRecipientAddress: NULL_ADDRESS,
            senderAddress: NULL_ADDRESS,
            expirationTimeSeconds: new BigNumber(Date.now() + FIVE_DAYS_IN_MS)
                // tslint:disable-next-line:custom-no-magic-numbers
                .div(1000)
                .integerValue(BigNumber.ROUND_FLOOR),
            exchangeAddress: contractAddresses.exchange,
            chainId: chainConfig.chainId,
        };
        const orderHash = orderHashUtils.getOrderHashHex(order);
        const signature = await signatureUtils.ecSignHashAsync(
            chainConfig.web3Wrapper.getProvider(),
            orderHash,
            configs.DISPENSER_ADDRESS,
takerAssetAmount,
            makerAssetData,
            takerAssetData,
            salt: generatePseudoRandomSalt(),
            makerFeeAssetData: makerAssetData,
            takerFeeAssetData: takerAssetData,
            feeRecipientAddress: NULL_ADDRESS,
            senderAddress: NULL_ADDRESS,
            expirationTimeSeconds: new BigNumber(Date.now() + FIVE_DAYS_IN_MS)
                // tslint:disable-next-line:custom-no-magic-numbers
                .div(1000)
                .integerValue(BigNumber.ROUND_FLOOR),
            exchangeAddress: contractAddresses.exchange,
            chainId: chainConfig.chainId,
        };
        const orderHash = orderHashUtils.getOrderHashHex(order);
        const signature = await signatureUtils.ecSignHashAsync(
            chainConfig.web3Wrapper.getProvider(),
            orderHash,
            configs.DISPENSER_ADDRESS,
        );
        const signedOrder: SignedOrder = {
            ...order,
            signature,
        };
        const payload = JSON.stringify(signedOrder);
        logUtils.log(`Dispensed signed order: ${payload}`);
        res.status(constants.SUCCESS_STATUS).send(payload);
    }
}
makerAssetData,
            takerAssetData,
            salt: generatePseudoRandomSalt(),
            makerFeeAssetData: makerAssetData,
            takerFeeAssetData: takerAssetData,
            feeRecipientAddress: NULL_ADDRESS,
            senderAddress: NULL_ADDRESS,
            expirationTimeSeconds: new BigNumber(Date.now() + FIVE_DAYS_IN_MS)
                // tslint:disable-next-line:custom-no-magic-numbers
                .div(1000)
                .integerValue(BigNumber.ROUND_FLOOR),
            exchangeAddress: contractAddresses.exchange,
            chainId: chainConfig.chainId,
        };
        const orderHash = orderHashUtils.getOrderHashHex(order);
        const signature = await signatureUtils.ecSignHashAsync(
            chainConfig.web3Wrapper.getProvider(),
            orderHash,
            configs.DISPENSER_ADDRESS,
        );
        const signedOrder: SignedOrder = {
            ...order,
            signature,
        };
        const payload = JSON.stringify(signedOrder);
        logUtils.log(`Dispensed signed order: ${payload}`);
        res.status(constants.SUCCESS_STATUS).send(payload);
    }
}
submitOrder ({commit, state, dispatch}, order) {
    // console.log('hier?')
    console.log(order)

    if (typeof order === 'string') order = JSON.parse(order)
    // {
    //   try {
    //     ZeroEx.isValidSignature(order)
    //   } catch (error) {
    //     console.error(error)
    //     dispatch('addNotification', {type: 'error', 'text': 'Order failed, check log for details'})
    //   }
    // }
    try {
      var orderHash = ZeroEx.getOrderHashHex(order)
      console.log('HASH', orderHash)
      return zeroEx.signOrderHashAsync(orderHash, state.addresses[0]).then((ecSignature) => {
        const signedOrder = {
          ...order,
          ecSignature
        }
        // console.log(signedOrder)
        // commit('ADD_ORDER', signedOrder)
        return axios.post('/order/new', signedOrder).then((results) => {
          // console.log(results)
          dispatch('pageServer')
          dispatch('addNotification', {type: 'success', 'text': 'Order Added'})
        }).catch((error) => {
          dispatch('addNotification', {type: 'error', 'text': 'Order failed, check log for details'})
          console.error(error)
        })
connect ({dispatch, commit, getters, state}) {
    let providerEngine = null
    if (window.web3) {
      providerEngine = window.web3.currentProvider
    } else {
      const ROPSTEN_ENDPOINT = 'https://infura.io'

      providerEngine = new ProviderEngine()
      providerEngine.addProvider(new FilterSubprovider())
      providerEngine.addProvider(new RpcSubprovider({rpcUrl: ROPSTEN_ENDPOINT}))
      providerEngine.start()
    }

    zeroEx = new ZeroEx(providerEngine)
    zeroEx._web3Wrapper.web3.version.getNetwork((error, response) => {
      if (error) console.error(error)
      if (parseInt(response) === 42 && window.location.hostname !== 'kovan.0xchange.me') {
        window.location.href = 'https://kovan.0xchange.me'
      } else if (parseInt(response) === 1 && window.location.hostname === 'kovan.0xchange.me') {
        window.location.href = 'https://0xchange.me'
      }
    })
    // commit('SET_ZERO_EX', zeroEx)
    // 3117574 kovan
    // 4145578 mainnet
    // zeroEx.exchange.getLogsAsync('LogFill', {fromBlock: 4219261, toBlock: 'latest'}, {}).then((logs) => {
    //   console.log(logs)
    //   commit('ADD_LOGS', logs)
    //   console.log(logs[0])
    //   let data = logs[0].data
//   //   console.log(result)
    //   // })
    // })

    // zeroEx.tokenRegistry.getTokensAsync().then((tokens) => {
    //   console.log('tokens returned')
    //   commit('ADD_TOKENS', tokens)
    //   console.log('tokens:', tokens)
    //   const symbols = getters.tokenSymbols
    //   var index = symbols.indexOf('WETH')
    //   if (index !== -1) {
    //     symbols[index] = 'ETH'
    //   }
    //
    // })
    commit('SET_NULL_ADDRESS', ZeroEx.NULL_ADDRESS)
    zeroEx.etherToken.getContractAddressAsync().then((address) => {
      commit('SET_WETH_ADDRESS', address)
    })
    zeroEx.exchange.getZRXTokenAddressAsync().then((address) => {
      commit('SET_ZRX_ADDRESS', address)
    })
    zeroEx.exchange.getContractAddressAsync().then((address) => {
      commit('SET_EXCHANGE_ADDRESS', address)
    })
    zeroEx.getAvailableAddressesAsync().then((addresses) => {
      commit('SET_ADDRESSES', addresses)
    })
  },
  addTokenAddress ({commit}, address) {
const etherTokenAddress = contractAddresses.etherToken;
    const dummyERC721TokenContract = dummyERC721TokenContracts[0];
    if (!dummyERC721TokenContract) {
        console.log('No Dummy ERC721 Tokens deployed on this network');
        return;
    }

    // Initialize the Web3Wrapper, this provides helper functions around fetching
    // account information, balances, general contract logs
    const web3Wrapper = new Web3Wrapper(providerEngine);
    const [maker, taker] = await web3Wrapper.getAvailableAddressesAsync();
    const printUtils = new PrintUtils(web3Wrapper, contractWrappers, { maker, taker }, { WETH: etherTokenAddress });
    printUtils.printAccounts();

    // the amount the maker is selling of maker asset: 1 ERC721 Token
    const makerAssetAmount = new BigNumber(1);
    // the amount the maker is selling of maker asset
    const takerAssetAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(0.1), DECIMALS);
    const tokenId = generatePseudoRandomSalt();
    // 0x v2 uses hex encoded asset data strings to encode all the information needed to identify an asset
    const makerAssetData = assetDataUtils.encodeERC721AssetData(dummyERC721TokenContract.address, tokenId);
    const takerAssetData = assetDataUtils.encodeERC20AssetData(etherTokenAddress);
    let txHash;

    // Mint a new ERC721 token for the maker
    const mintTxHash = await dummyERC721TokenContract.mint.sendTransactionAsync(maker, tokenId, { from: maker });
    await printUtils.awaitTransactionMinedSpinnerAsync('Mint ERC721 Token', mintTxHash);
    // Allow the 0x ERC721 Proxy to move ERC721 tokens on behalf of maker
    const isApproved = true;
    const makerERC721ApprovalTxHash = await dummyERC721TokenContract.setApprovalForAll.validateAndSendTransactionAsync(
        contractAddresses.erc721Proxy,
        isApproved,
export async function scenarioAsync(): Promise {
    PrintUtils.printScenario('Exchange Subscribe');
    await runMigrationsOnceIfRequiredAsync();
    // Initialize the ContractWrappers, this provides helper functions around calling
    // 0x contracts as well as ERC20/ERC721 token contracts on the blockchain
    const contractWrappers = new ContractWrappers(providerEngine, { networkId: NETWORK_CONFIGS.networkId });
    // No filter, get all of the Fill Events
    const filterValues: IndexedFilterValues = {};
    // Subscribe to the Fill Events on the Exchange
    contractWrappers.exchange.subscribe(
        ExchangeEvents.Fill,
        filterValues,
        (err: null | Error, decodedLogEvent?: DecodedLogEvent) => {
            if (err) {
                console.log('error:', err);
                providerEngine.stop();
            } else if (decodedLogEvent) {
                const fillLog = decodedLogEvent.log;
                const makerAssetData = assetDataUtils.decodeERC20AssetData(fillLog.args.makerAssetData);
                const takerAssetData = assetDataUtils.decodeERC20AssetData(fillLog.args.takerAssetData);
                PrintUtils.printData('Fill Event', [
                    ['orderHash', fillLog.args.orderHash],

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