Creating outline transactions on Blockchain Ethereum using Java and Pushtx API

Blockchain Ethereum is a decentralized, public and safe platform for storage and transactions. One of its key functions is the ability to create and broadcast off -air transactions through API Pushtx from external applications, such as mobile applications or Internet customers. In this article, we will examine how to create an out -of -the -art transaction in Java, which can be given a blockchain Ethereum using API Pushtx interfaces.

background

API Pushtx allows developers to send raw transactions to the knot in the Ethereum network without waiting to check the transaction with a peer (ie the second knot). This allows you to create and broadcast offline transactions from external applications. To use the API Pushtx interface, you have to get the Ethereum portfolio address that is not yet used as a wallet.

Select between Bitcoinj and Pushtx

There are two popular interaction libraries with Blockchain Ethereum in Java: Bitcoinj and Pushtx. Here’s a brief comparison:

* Bitcoinj : A complete functional library of clients cryptocurrencies that allows interaction with blockchain Ethereum using different protocols (eg JSON-RPC, HTTP). However, it requires the portfolio address and is not specifically designed for offline transactions.

* Pushtx : Library developed by infrastructure infrastructure supplier based on an Ethereum web network. Pushtx provides simply API interface to create and send raw transactions to the nodes in the Ethereum network.

In this example, we will use Pushtx.

Extraordinary transactions in Java

To create an off -hearted transaction using Pushtx, you must:

• Create a new class “Pushtx”:

`Java

Imports Com.infura.pushtx.pushtx;

Import Com.infura.pushtx.pushtransation;

Public class offlinetransactionexamammple {

Public Static Void Main (String [] ARGS) {

// Set your URL Ethereum Node Address (eg "

String nodeurl = "

// Create a new instance of pushtx class instances

Pushtx Pushtx = New Pushtx (Nodeurl);

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• Set "Walletaddress" to the address of the Ethereum portfolio, which is not yet used as a wallet:

Java

// Set up your portfolio address Ethereum

String Walletaddress = "0xyour_wallet_address";

• Create a new class "Pushtransation":

Java

// Create a new Pushtransation object

Pushtransation Transaction = Pushtx.coreateransation (

New String [] {"0x1234567890ABDEF", "Your transaction data"})

);

Signature of offline transactions

In order to sign an off -speed transaction, you must use the "PushTx" Class "reference number::

Java

// Sign the transaction with a private key

String reportedtransation = pushtx.signtransation (transaction, new string [] {"your_private_KEY"});

Extraordinary Transaction

After creating and signature of the out -of -the -art transactions, you can broadcast it on the Ethereum network using API Pushtx. Here's an example of how to do it:

Java

// Create a new instance of Pushtx Class with the same URL and the Wallet Wallet address

Pushtx Pushtx = New Pushtx (Nodeurl);

// Set the signed transaction as a load load

String filling = sonnedtransation;

// transactional transaction using API Pushtx

Pushtx.broadCast (loading, new string [] {"0x1234567890ABDEF", "Your transaction data"});

Code samples

Here's an example of a code sample showing how to take the above steps:

` Java

Imports Com.infura.pushtx.pushtx;

Import Com.infura.pushtx.pushtransation;

Public class offlinetransactionexamammple {

Public Static Void Main (String [] ARGS) {

// Set up the URL Ethereum node (e.g.

Ethereum Weight Used