Java Code Examples for org.web3j.protocol.Web3j#build()

The following examples show how to use org.web3j.protocol.Web3j#build() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: TransactionHandler.java From alpha-wallet-android with MIT License

6 votes

public TransactionHandler(int networkId)
{
    String nodeURL = EthereumNetworkBase.getNetworkByChain(networkId).rpcServerUrl;
    OkHttpClient.Builder builder = new OkHttpClient.Builder();
    builder.connectTimeout(20, TimeUnit.SECONDS);
    builder.readTimeout(20, TimeUnit.SECONDS);
    HttpService service = new HttpService(nodeURL, builder.build(), false);
    mWeb3 = Web3j.build(service);
    try
    {
        Web3ClientVersion web3ClientVersion = mWeb3.web3ClientVersion().sendAsync().get();
        System.out.println(web3ClientVersion.getWeb3ClientVersion());
    }
    catch (Exception e)
    {
        e.printStackTrace();
    }
}

Example 2

Source File: BaseIntegrationTest.java From eventeum with Apache License 2.0

5 votes

@Before
public void setUp() throws Exception {

    initRestTemplate();
    this.web3j = Web3j.build(new HttpService("http://localhost:8545"));
    this.admin = Admin.build(new HttpService("http://localhost:8545"));

    this.web3j.ethSendTransaction(Transaction.createEtherTransaction(
            this.web3j.ethAccounts().send().getAccounts().get(0),

            this.web3j.ethGetTransactionCount(
                this.web3j.ethAccounts().send().getAccounts().get(0),
                    DefaultBlockParameterName.fromString("latest")
            ).send().getTransactionCount(),

            BigInteger.valueOf(2000),
            BigInteger.valueOf(6721975),
            CREDS.getAddress(),
            new BigInteger("9460000000000000000"))
    ).send();

    dummyEventFilterId = UUID.randomUUID().toString();
    dummyEventNotOrderedFilterId = UUID.randomUUID().toString();

    clearMessages();

}

Example 3

Source File: RegisterAction.java From teku with Apache License 2.0

5 votes

private DepositTransactionSender createTransactionSender() {
  httpClient = new OkHttpClient.Builder().connectionPool(new ConnectionPool()).build();
  executorService =
      Executors.newScheduledThreadPool(
          1, new ThreadFactoryBuilder().setDaemon(true).setNameFormat("web3j-%d").build());
  web3j = Web3j.build(new HttpService(eth1NodeUrl, httpClient), 1000, executorService);
  return new DepositTransactionSender(web3j, contractAddress, eth1Credentials);
}

Example 4

Source File: FetchGasSettingsInteract.java From Upchain-wallet with GNU Affero General Public License v3.0

5 votes

public BigInteger getTransactionGasLimit(Transaction transaction) {

        final Web3j web3j = Web3j.build(new HttpService(networkRepository.getDefaultNetwork().rpcServerUrl));
        try {
            EthEstimateGas ethEstimateGas = web3j.ethEstimateGas(transaction).send();
            if (ethEstimateGas.hasError()){
                throw new RuntimeException(ethEstimateGas.getError().getMessage());
            }
            return ethEstimateGas.getAmountUsed();
        } catch (IOException e) {
            throw new RuntimeException("net error");
        }

    }

Example 5

Source File: TokenRepository.java From alpha-wallet-android with MIT License

5 votes

public static Web3j getWeb3jService(int chainId)
{
    OkHttpClient okClient = new OkHttpClient.Builder()
            .connectTimeout(10, TimeUnit.SECONDS)
            .readTimeout(10, TimeUnit.SECONDS)
            .writeTimeout(10, TimeUnit.SECONDS)
            .retryOnConnectionFailure(false)
            .build();
    AWHttpService publicNodeService = new AWHttpService(EthereumNetworkRepository.getNodeURLByNetworkId (chainId), EthereumNetworkRepository.getSecondaryNodeURL(chainId), okClient, false);
    EthereumNetworkRepository.addRequiredCredentials(chainId, publicNodeService);
    return Web3j.build(publicNodeService);
}

Example 6

Source File: WalletSendFunds.java From client-sdk-java with Apache License 2.0

5 votes

private Web3j getEthereumClient() {
    String clientAddress = console.readLine(
            "Please confirm address of running Ethereum client you wish to send "
            + "the transfer request to [" + HttpService.DEFAULT_URL + "]: ")
            .trim();

    Web3j web3j;
    if (clientAddress.equals("")) {
        web3j = Web3j.build(new HttpService());
    } else {
        web3j = Web3j.build(new HttpService(clientAddress));
    }

    try {
        Web3ClientVersion web3ClientVersion = web3j.web3ClientVersion().sendAsync().get();
        if (web3ClientVersion.hasError()) {
            exitError("Unable to process response from client: "
                    + web3ClientVersion.getError());
        } else {
            console.printf("Connected successfully to client: %s%n",
                    web3ClientVersion.getWeb3ClientVersion());
            return web3j;
        }
    } catch (InterruptedException | ExecutionException e) {
        exitError("Problem encountered verifying client: " + e.getMessage());
    }
    throw new RuntimeException("Application exit failure");
}

Example 7

Source File: GetBalanceWorkitemHandler.java From jbpm-work-items with Apache License 2.0

5 votes

public void executeWorkItem(WorkItem workItem,
                            WorkItemManager workItemManager) {
    try {
        RequiredParameterValidator.validate(this.getClass(),
                                            workItem);

        String serviceURL = (String) workItem.getParameter("ServiceURL");

        Map<String, Object> results = new HashMap();

        if (web3j == null) {
            web3j = Web3j.build(new HttpService(serviceURL));
        }

        auth = new EthereumAuth(walletPassword,
                                walletPath,
                                classLoader);
        Credentials credentials = auth.getCredentials();

        results.put(RESULTS_VALUE,
                    EthereumUtils.getBalanceInEther(credentials,
                                                    web3j));

        workItemManager.completeWorkItem(workItem.getId(),
                                         results);
    } catch (Exception e) {
        logger.error("Error executing workitem: " + e.getMessage());
        handleException(e);
    }
}

Example 8

Source File: DeployContractWorkitemHandler.java From jbpm-work-items with Apache License 2.0

4 votes

public void executeWorkItem(WorkItem workItem,
                            WorkItemManager workItemManager) {
    try {
        RequiredParameterValidator.validate(this.getClass(),
                                            workItem);

        String serviceURL = (String) workItem.getParameter("ServiceURL");
        String contractPath = (String) workItem.getParameter("ContractPath");
        String depositAmount = (String) workItem.getParameter("DepositAmount");
        String waitForReceiptStr = (String) workItem.getParameter("WaitForReceipt");

        Map<String, Object> results = new HashMap<String, Object>();

        if (web3j == null) {
            web3j = Web3j.build(new HttpService(serviceURL));
        }

        auth = new EthereumAuth(walletPassword,
                                walletPath,
                                classLoader);
        Credentials credentials = auth.getCredentials();

        int depositEtherAmountToSend = 0;
        if (depositAmount != null) {
            depositEtherAmountToSend = Integer.parseInt(depositAmount);
        }

        boolean waitForReceipt = false;
        if (waitForReceiptStr != null) {
            waitForReceipt = Boolean.parseBoolean(waitForReceiptStr);
        }

        String createdContractAddress = EthereumUtils.deployContract(credentials,
                                                                     web3j,
                                                                     EthereumUtils.convertStreamToStr(classLoader.getResourceAsStream(contractPath)),
                                                                     depositEtherAmountToSend,
                                                                     waitForReceipt,
                                                                     EthereumUtils.DEFAULT_SLEEP_DURATION,
                                                                     org.jbpm.process.workitem.ethereum.EthereumUtils.DEFAULT_ATTEMPTS);

        results.put(RESULTS,
                    createdContractAddress);

        workItemManager.completeWorkItem(workItem.getId(),
                                         results);
    } catch (Exception e) {
        logger.error("Error executing workitem: " + e.getMessage());
        handleException(e);
    }
}

Example 9

Source File: PowchainService.java From teku with Apache License 2.0

4 votes

public PowchainService(final ServiceConfig config) {
  TekuConfiguration tekuConfig = config.getConfig();

  AsyncRunner asyncRunner = config.createAsyncRunner("powchain");

  final HttpService web3jService = new HttpService(tekuConfig.getEth1Endpoint());
  web3jService.addHeader("User-Agent", VersionProvider.VERSION);
  Web3j web3j = Web3j.build(web3jService);

  final Eth1Provider eth1Provider =
      new ThrottlingEth1Provider(
          new ErrorTrackingEth1Provider(
              new Web3jEth1Provider(web3j, asyncRunner), asyncRunner, config.getTimeProvider()),
          MAXIMUM_CONCURRENT_ETH1_REQUESTS);

  DepositContractAccessor depositContractAccessor =
      DepositContractAccessor.create(
          eth1Provider, web3j, config.getConfig().getEth1DepositContractAddress().toHexString());

  final Eth1EventsChannel eth1EventsChannel =
      config.getEventChannels().getPublisher(Eth1EventsChannel.class);
  final Eth1DepositStorageChannel eth1DepositStorageChannel =
      config.getEventChannels().getPublisher(Eth1DepositStorageChannel.class);
  final Eth1BlockFetcher eth1BlockFetcher =
      new Eth1BlockFetcher(
          eth1EventsChannel,
          eth1Provider,
          config.getTimeProvider(),
          calculateEth1DataCacheDurationPriorToCurrentTime());

  final DepositFetcher depositFetcher =
      new DepositFetcher(
          eth1Provider,
          eth1EventsChannel,
          depositContractAccessor.getContract(),
          eth1BlockFetcher,
          asyncRunner);

  headTracker = new Eth1HeadTracker(asyncRunner, eth1Provider);
  final DepositProcessingController depositProcessingController =
      new DepositProcessingController(
          eth1Provider,
          eth1EventsChannel,
          asyncRunner,
          depositFetcher,
          eth1BlockFetcher,
          headTracker);

  eth1DepositManager =
      new Eth1DepositManager(
          eth1Provider,
          asyncRunner,
          eth1EventsChannel,
          eth1DepositStorageChannel,
          depositProcessingController,
          new MinimumGenesisTimeBlockFinder(eth1Provider));
}

Example 10

Source File: CoreIT.java From etherscan-explorer with GNU General Public License v3.0

4 votes

@Before
public void setUp() {
    //this.web3j = Web3j.build(new HttpService());
    this.web3j = Web3j.build(new UnixIpcService("/Users/bing/test/data/geth.ipc"));
}

Example 11

Source File: TransactExistingContractWorkitemHandler.java From jbpm-work-items with Apache License 2.0

4 votes

public void executeWorkItem(WorkItem workItem,
                            WorkItemManager workItemManager) {
    try {
        RequiredParameterValidator.validate(this.getClass(),
                                            workItem);

        String serviceURL = (String) workItem.getParameter("ServiceURL");
        String contractAddress = (String) workItem.getParameter("ContractAddress");
        String waitForReceiptStr = (String) workItem.getParameter("WaitForReceipt");
        String methodName = (String) workItem.getParameter("MethodName");
        Type methodInputType = (Type) workItem.getParameter("MethodInputType");
        String depositAmount = (String) workItem.getParameter("DepositAmount");

        Map<String, Object> results = new HashMap<String, Object>();

        if (web3j == null) {
            web3j = Web3j.build(new HttpService(serviceURL));
        }

        auth = new EthereumAuth(walletPassword,
                                walletPath,
                                classLoader);
        Credentials credentials = auth.getCredentials();

        int depositEtherAmountToSend = 0;
        if (depositAmount != null) {
            depositEtherAmountToSend = Integer.parseInt(depositAmount);
        }

        boolean waitForReceipt = false;
        if (waitForReceiptStr != null) {
            waitForReceipt = Boolean.parseBoolean(waitForReceiptStr);
        }

        List<Type> methodInputTypeList = new ArrayList<>();
        if (methodInputType != null) {
            methodInputTypeList = Collections.singletonList(methodInputType);
        }

        TransactionReceipt transactionReceipt = EthereumUtils.transactExistingContract(
                credentials,
                web3j,
                depositEtherAmountToSend,
                EthereumUtils.DEFAULT_GAS_PRICE,
                EthereumUtils.DEFAULT_GAS_LIMIT,
                contractAddress,
                methodName,
                methodInputTypeList,
                null,
                waitForReceipt,
                EthereumUtils.DEFAULT_SLEEP_DURATION,
                EthereumUtils.DEFAULT_ATTEMPTS);

        results.put(RESULTS,
                    transactionReceipt);

        workItemManager.completeWorkItem(workItem.getId(),
                                         results);
    } catch (Exception e) {
        logger.error("Error executing workitem: " + e.getMessage());
        handleException(e);
    }
}

Example 12

Source File: RequestTest.java From web3j with Apache License 2.0

4 votes

@Override
protected void initWeb3Client(HttpService httpService) {
    web3j = Web3j.build(httpService);
}

Example 13

Source File: ObserveContractEventWorkitemHandler.java From jbpm-work-items with Apache License 2.0

4 votes

public void executeWorkItem(WorkItem workItem,
                            WorkItemManager workItemManager) {
    try {
        RequiredParameterValidator.validate(this.getClass(),
                                            workItem);

        String serviceURL = (String) workItem.getParameter("ServiceURL");
        String contractAddress = (String) workItem.getParameter("ContractAddress");
        String eventName = (String) workItem.getParameter("EventName");
        List<TypeReference<?>> eventIndexedParameter = (List<TypeReference<?>>) workItem.getParameter("EventIndexedParameter");
        List<TypeReference<?>> eventNonIndexedParameter = (List<TypeReference<?>>) workItem.getParameter("EventNonIndexedParameter");
        String eventReturnType = (String) workItem.getParameter("EventReturnType");
        String signalName = (String) workItem.getParameter("SignalName");
        String abortOnUpdate = (String) workItem.getParameter("AbortOnUpdate");

        boolean doAbortOnUpdate = Boolean.parseBoolean(abortOnUpdate);

        if (eventIndexedParameter == null) {
            eventIndexedParameter = new ArrayList<>();
        }

        if (eventNonIndexedParameter == null) {
            eventNonIndexedParameter = new ArrayList<>();
        }

        if (web3j == null) {
            web3j = Web3j.build(new HttpService(serviceURL));
        }

        KieSession localksession = ksession;
        RuntimeManager runtimeManager = null;
        RuntimeEngine engine = null;
        if (localksession == null) {
            runtimeManager = RuntimeManagerRegistry.get().getManager(((org.drools.core.process.instance.WorkItem) workItem).getDeploymentId());
            engine = runtimeManager.getRuntimeEngine(ProcessInstanceIdContext.get(workItem.getProcessInstanceId()));
            localksession = engine.getKieSession();
        }
        try {
            EthereumUtils.observeContractEvent(web3j,
                                               eventName,
                                               contractAddress,
                                               eventIndexedParameter,
                                               eventNonIndexedParameter,
                                               eventReturnType,
                                               localksession,
                                               signalName,
                                               doAbortOnUpdate,
                                               workItemManager,
                                               workItem);
            
        } finally {
            if (engine != null) {
                runtimeManager.disposeRuntimeEngine(engine);
            }
        }
    } catch (Exception e) {
        logger.error("Error executing workitem: " + e.getMessage());
        handleException(e);
    }
}

Example 14

Source File: FilterTester.java From client-sdk-java with Apache License 2.0

4 votes

@Before
public void setUp() {
    web3jService = mock(Web3jService.class);
    web3j = Web3j.build(web3jService, 1000, scheduledExecutorService);
}

Example 15

Source File: JsonRpc2_0RxTest.java From client-sdk-java with Apache License 2.0

4 votes

@Before
public void setUp() {
    web3jService = mock(Web3jService.class);
    web3j = Web3j.build(web3jService, 1000, Executors.newSingleThreadScheduledExecutor());
}

Example 16

Source File: RequestTest.java From etherscan-explorer with GNU General Public License v3.0

4 votes

@Override
protected void initWeb3Client(HttpService httpService) {
    web3j = Web3j.build(httpService);
}

Example 17

Source File: Scenario.java From client-sdk-java with Apache License 2.0

4 votes

private VoteInfo createVoteInfo(String nodeHost, String nodeId, VoteOption voteOption) {
  	Web3j web3j =  Web3j.build(new HttpService(nodeHost));
  	ProposalContract voteContract = ProposalContract.load(web3j, voteCredentials, chainId);
  	return new VoteInfo(voteContract, nodeId, voteOption,web3j);
}

Example 18

Source File: Web3Service.java From tutorials with MIT License

4 votes

public void customInit(String provider) {
    this.web3j = Web3j.build(new HttpService(provider));
}

Example 19

Source File: JsonRpc2_0RxTest.java From web3j with Apache License 2.0

4 votes

@BeforeEach
public void setUp() {
    web3jService = mock(Web3jService.class);
    web3j = Web3j.build(web3jService, 1000, Executors.newSingleThreadScheduledExecutor());
}

Example 20

Source File: CreateTransactionInteract.java From Upchain-wallet with GNU Affero General Public License v3.0

4 votes

public Single<String>  createERC20Transfer(ETHWallet from,  String to, String contractAddress, BigInteger amount, BigInteger gasPrice, BigInteger gasLimit, String password) {
    final Web3j web3j = Web3j.build(new HttpService(networkRepository.getDefaultNetwork().rpcServerUrl));

    String callFuncData = TokenRepository.createTokenTransferData(to, amount);


    return networkRepository.getLastTransactionNonce(web3j, from.address)
            .flatMap(nonce -> Single.fromCallable( () -> {

        Credentials credentials = WalletUtils.loadCredentials(password,  from.getKeystorePath());
        RawTransaction rawTransaction = RawTransaction.createTransaction(
                nonce, gasPrice, gasLimit, contractAddress, callFuncData);

        LogUtils.d("rawTransaction:" + rawTransaction);

        byte[] signedMessage = TransactionEncoder.signMessage(rawTransaction, credentials);

        String hexValue = Numeric.toHexString(signedMessage);
        EthSendTransaction ethSendTransaction = web3j.ethSendRawTransaction(hexValue).send();

        return ethSendTransaction.getTransactionHash();

    } ).subscribeOn(Schedulers.computation())
                    .observeOn(AndroidSchedulers.mainThread()));
}