org.exoplatform.addon.wallet.blockchain.service

Class EthereumClientConnector

java.lang.Object

org.exoplatform.addon.wallet.blockchain.service.EthereumClientConnector

All Implemented Interfaces:

ExoBlockchainTransactionService, org.picocontainer.Startable

public class EthereumClientConnector
extends Object
implements ExoBlockchainTransactionService, org.picocontainer.Startable

A Web3j connector class to interact with Ethereum Blockchain

Constructor Summary

Constructors

Constructor and Description
EthereumClientConnector(ClassLoader webappClassLoader)

Method Summary

Modifier and Type	Method and Description
org.web3j.protocol.core.methods.response.EthBlock.Block	getBlock(String blockHash) Get block by hash
Set<String>	getContractTransactions(String contractsAddress, long fromBlock, long toBlock) Retrieve from blockchain transaction hashes from contract starting from a block number to a block number
long	getLastestBlockNumber()
org.web3j.protocol.core.methods.response.Transaction	getTransaction(String transactionHash) Get transaction by hash
org.web3j.protocol.core.methods.response.TransactionReceipt	getTransactionReceipt(String transactionHash) Get transaction receipt by hash
org.web3j.protocol.Web3j	getWeb3j()
ClassLoader	getWebappClassLoader()
boolean	isConnected()
void	start()
void	start(String websocketURL)
void	stop()
void	waitConnection()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EthereumClientConnector

public EthereumClientConnector(ClassLoader webappClassLoader)

Method Detail

getWebappClassLoader

public ClassLoader getWebappClassLoader()

Specified by:

getWebappClassLoader in interface ExoBlockchainTransactionService

start

public void start()

Specified by:

start in interface org.picocontainer.Startable

start

public void start(String websocketURL)

stop

public void stop()

Specified by:

stop in interface org.picocontainer.Startable

getTransaction

public org.web3j.protocol.core.methods.response.Transaction getTransaction(String transactionHash)
                                                                    throws InterruptedException

Get transaction by hash

Parameters:

transactionHash - transaction hash to retrieve

Returns:

Web3j Transaction object

Throws:

InterruptedException - when Blockchain request is interrupted

getBlock

public org.web3j.protocol.core.methods.response.EthBlock.Block getBlock(String blockHash)
                                                                 throws InterruptedException

Get block by hash

Parameters:

blockHash - block hash to retrieve

Returns:

Web3j Block object

Throws:

InterruptedException - when Blockchain request is interrupted

getTransactionReceipt

public org.web3j.protocol.core.methods.response.TransactionReceipt getTransactionReceipt(String transactionHash)
                                                                                  throws InterruptedException

Get transaction receipt by hash

Parameters:

transactionHash - transaction hash to retrieve

Returns:

Web3j Transaction receipt object

Throws:

InterruptedException - when Blockchain request is interrupted

isConnected

public boolean isConnected()

Returns:

true if the connection to the blockchain is established

getLastestBlockNumber

public long getLastestBlockNumber()
                           throws InterruptedException,
                                  IOException

Returns:

last mined block number from blockchain

Throws:

InterruptedException - when waiting for blockchain is interrupted

IOException - when error sending transaction on blockchain

getContractTransactions

public Set<String> getContractTransactions(String contractsAddress,
                                           long fromBlock,
                                           long toBlock)
                                    throws IOException,
                                           InterruptedException

Retrieve from blockchain transaction hashes from contract starting from a block number to a block number

Parameters:

contractsAddress - blockchain contract address

fromBlock - search starting from this block number

toBlock - search until this block number

Returns:

a Set of transaction hashes

Throws:

IOException - if an error happens while getting information from blockchain

InterruptedException - if an interruption is made while getting information from blockchain

getWeb3j

public org.web3j.protocol.Web3j getWeb3j()
                                  throws InterruptedException

Throws:

InterruptedException

waitConnection

public void waitConnection()
                    throws InterruptedException

Throws:

InterruptedException