[Ethereum] retry mechanism for transactions in web3j

ethereumjgo-ethereumjavaweb3j

In my Java-web-application I have (with one click) to send about 120 transactions after each other from the same address to the same smartcontract.

My question: is there any java libraries or implemented "retry mechanism" for handling very long pending transactions, or a way to save transactions in a persistent Queue (cause i can't just save them in memory) before sending them to the Blockchain.

Best Answer

Assuming you want to broadcast 120 transactions, but the transaction no 50 gets stuck because it has a low gas price.

You can reconstruct the tx number 50, set a higher gas price and broadcast the new tx.

As long as the sending address and the nonce for tx no 50 are the same, everything else can be different: the amount sent, the type of transaction, etc.

Related Solutions

[Ethereum] How to convert Java String to Bytes32 in Java ? I am using web3j solidity wrapper to interact with Smart contract. I am getting following error:

It is best to use the JVM runtime library whenever possible; that code is usually of high quality, although exceptions do exist. In the following code I first create a byte[], then derive a hex value by calling DatatypeConverter.printHexBinary.

byte[] byteArray = "This string is converted to a byte array".getBytes();
String hexValue = javax.xml.bind.DatatypeConverter.printHexBinary(byteArray);

Web3j – How to Send Transactions Continuously Using Web3j Generated Wrapper

I found the solution, please refer, #296

Use FastRawTransactionManager to speed up your transactions. Use RawTransactionManager to shorten the polling interval. If you need both, use the following code,

pollingInterval = 3000; // 3 seconds
FastRawTransactionManager fastRawTxMgr = new FastRawTransactionManager(web3, credentials, new PollingTransactionReceiptProcessor(web3j, pollingInterval, 40));
Contract contract = MyPersonalContract.load(contractAddr, web3, fastRawTxMgr, gasPrice, gasLimit);

Best Answer

Related Solutions

[Ethereum] How to convert Java String to Bytes32 in Java ? I am using web3j solidity wrapper to interact with Smart contract. I am getting following error:

Web3j – How to Send Transactions Continuously Using Web3j Generated Wrapper

Related Topic