Package org.exoplatform.wallet.blockchain.service

Class EthereumClientConnector

java.lang.Object
org.exoplatform.wallet.blockchain.service.EthereumClientConnector
All Implemented Interfaces:
org.exoplatform.wallet.statistic.ExoWalletStatisticService, org.picocontainer.Startable
public class EthereumClientConnector extends Object implements org.exoplatform.wallet.statistic.ExoWalletStatisticService, org.picocontainer.Startable
A Web3j connector class to interact with Ethereum Blockchain

  • Field Details

  • Constructor Details

    • EthereumClientConnector

      public EthereumClientConnector(org.exoplatform.services.cache.CacheService cacheService)

  • Method Details

    • start

      public void start()
      Specified by:
      start in interface org.picocontainer.Startable

    • stop

      public void stop()
      Specified by:
      stop in interface org.picocontainer.Startable

    • isPermanentlyScanBlockchain

      public boolean isPermanentlyScanBlockchain()

    • isListeningToBlockchain

      public boolean isListeningToBlockchain()

    • getTransaction

      public org.web3j.protocol.core.methods.response.Transaction getTransaction(String transactionHash)
      Get transaction by hash
      Parameters:
      transactionHash - transaction hash to retrieve
      Returns:
      Web3j Transaction object

    • getTransactionFromBlockchain

      public org.web3j.protocol.core.methods.response.Transaction getTransactionFromBlockchain(String transactionHash) throws IOException
      Get transaction by hash
      Parameters:
      transactionHash - transaction hash to retrieve
      Returns:
      Web3j Transaction object
      Throws:
      IOException - when a network error happens

    • getTransactionReceipt

      public org.web3j.protocol.core.methods.response.TransactionReceipt getTransactionReceipt(String transactionHash)
      Get transaction receipt by hash
      Parameters:
      transactionHash - transaction hash to retrieve
      Returns:
      Web3j Transaction receipt object

    • getEtherBalanceOf

      public final BigInteger getEtherBalanceOf(String address) throws IOException
      Throws:
      IOException

    • getTransactionReceiptFromBlockchain

      public org.web3j.protocol.core.methods.response.TransactionReceipt getTransactionReceiptFromBlockchain(String transactionHash) throws IOException
      Get transaction receipt by hash
      Parameters:
      transactionHash - transaction hash to retrieve
      Returns:
      Web3j Transaction receipt object
      Throws:
      IOException - when a network error happens

    • getLastestBlockNumber

      public long getLastestBlockNumber()
      Returns:
      last mined block number from blockchain

    • sendTransactionToBlockchain

      public CompletableFuture<org.web3j.protocol.core.methods.response.EthSendTransaction> sendTransactionToBlockchain(org.exoplatform.wallet.model.transaction.TransactionDetail transactionDetail) throws IOException
      Send raw transaction specified in Transaction detail
      Parameters:
      transactionDetail - TransactionDetail having rawTransaction to send to blockchain
      Returns:
      CompletableFuture for transaction sent asynchronously to blockchain
      Throws:
      IOException - if an error occurs while sending transaction to blockchain

    • getNonce

      public BigInteger getNonce(String walletAddress, org.web3j.protocol.core.DefaultBlockParameterName blockParameterName) throws IOException
      Retruns nonce corresponding for a given wallet address: * if using DefaultBlockParameterName.LATEST, this will return last mined transaction nonce * if using DefaultBlockParameterName.PENDING, this will return last pending transaction nonce that can be used to compute next pending transaction nonce
      Parameters:
      walletAddress - wallet address to determine its next nonce
      blockParameterName - DefaultBlockParameterName value
      Returns:
      next transaction nonce
      Throws:
      IOException - if an I/O problem happens when connecting to blockchain

    • getNonce

      public BigInteger getNonce(String walletAddress) throws IOException
      Retruns last mined transaction nonce
      Parameters:
      walletAddress - wallet address to determine its next nonce
      Returns:
      next transaction nonce
      Throws:
      IOException - if an I/O problem happens when connecting to blockchain

    • getGasPrice

      public BigInteger getGasPrice() throws IOException
      Returns:
      current
      Throws:
      IOException - if an error occurs while sending transaction to blockchain

    • getWeb3j

      public org.web3j.protocol.Web3j getWeb3j(boolean waitUntilConnected)

    • getStatisticParameters

      public Map<String,Object> getStatisticParameters(String statisticType, Object result, Object... methodArgs)
      Specified by:
      getStatisticParameters in interface org.exoplatform.wallet.statistic.ExoWalletStatisticService

    • renewTransactionListeningSubscription

      public Future<io.reactivex.disposables.Disposable> renewTransactionListeningSubscription(long lastWatchedBlockNumber)

    • cancelTransactionListeningToBlockchain

      public void cancelTransactionListeningToBlockchain()

    • setPollingInterval

      public void setPollingInterval(long pollingInterval)

    • getPollingInterval

      public long getPollingInterval()

    • setLastWatchedBlockNumber

      public void setLastWatchedBlockNumber(long blockNumber)

    • getLastWatchedBlockNumber

      public long getLastWatchedBlockNumber()

    • setWebSocketClient

      protected void setWebSocketClient(org.web3j.protocol.websocket.WebSocketClient webSocketClient)

    • setWeb3j

      protected void setWeb3j(org.web3j.protocol.Web3j web3j)

    • setWeb3jService

      protected void setWeb3jService(org.web3j.protocol.websocket.WebSocketService web3jService)

    • isConnected

      protected boolean isConnected()

    • connect

      protected boolean connect() throws Exception
      Throws:
      Exception

    • connect

      protected boolean connect(boolean periodicCheck) throws Exception
      Throws:
      Exception

    • checkConnection

      protected boolean checkConnection(boolean periodicCheck)

    • closeConnection

      protected void closeConnection()

    • setListenerService

      protected void setListenerService(org.exoplatform.services.listener.ListenerService listenerService)

    • getConnectionVerifierFuture

      protected ScheduledFuture<?> getConnectionVerifierFuture()

    • checkSubscription

      protected void checkSubscription()

    • renewSubscriptionWhenDisposed

      protected void renewSubscriptionWhenDisposed()

    • waitConnection

      protected void waitConnection(int tentatives)

    • subscribeToBlockchain

      protected Future<io.reactivex.disposables.Disposable> subscribeToBlockchain()

    • subscribeToBlockchain

      protected io.reactivex.disposables.Disposable subscribeToBlockchain(org.web3j.protocol.core.DefaultBlockParameterNumber lastWatchedBlock)

    • stopListeningToBlockchain

      protected void stopListeningToBlockchain()

    • uninstallFilter

      protected void uninstallFilter()

    • startPeriodicConnectionVerifier

      protected void startPeriodicConnectionVerifier()