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Transactions management with Ethereum on a server: a guide

As a developer of applications, you are probably familiar with the challenges of the management of transactions and safety when it comes to cryptocurrency. In this article, we will deepen how to manage the sending of transactions for a portfolio used for a server running on Ethereum.

The bases of the Ethereum

portfolios **

Before immersing yourself in the management of transactions, it is essential to understand the bases of the portfolios and the Ethereum transactions. A wallet is a digital storage system that allows users to archive, send and receive cryptocurrencies. In this case, you are using an arbitrun portfolio, which is a platform based on contracts for the construction of decentralized applications (DAPPS).

Use of an Ethereum portfolio on your server

To manage transactions on your server, you will have to use the Ethereum portfolio associated with your arbitrun application. Here is a step-by-step guide:

• Install the requested addictions : you will have to install the packages `web3 using NPM or yarn.

• Imports the library of the portfolio : it matters the application Web3 Da ‘Ethand creates an object that contains the details of the wallet:

Javascript

Const Web3 = Requirements (‘Web3’);

Const portfolio = requirement (‘./ wallet’);

Const Wallet = New Wallet ();

`

Management of sending transactions

When a user wants to withdraw their funds, you will have to send the transaction to the Ethereum network. Here's how to do it:

• Get the sender's balance : first, get the sender's balance using theGetbalance of the portfolio bookcase:

`Javascript

Const Mindraddress = ‘0x …’; // replace with the sender address

Const Libra = Waiting Web3.eth.getbalance (Senderaddress);

`

2

Javascript

Const = 100 amount; // replace with the amount of the desired withdrawal

`

• Create a new

  transaction: use the portfolio library to create a new transaction object:

Javascript

Const TX = Waiting Web3.eth.Sendransation ({

From: Senderaddress,

A: ‘0x …’, // address of the receiver

Value: Web3.utils.towei (Image.tostring (), ‘Ether’), // Amount of the transaction

Gasprice: Web3.utils.towei (’20 ‘,’ Gwei ‘) // Gas price (20 wei per gas)

});

`

• Sign the transaction : sign the transaction using the portfolio library:

Javascript

Const signature = ASVET Web3.eth.acauts.signransation ({{

Data: TX,

From: Senderaddress

}, ‘Privatekey’); // Replace with the private key

`

Processing and confirmation of transactions

After creating a new transaction, you will have to process it and confirm it in the Ethereum network. Here's how:

• Elaborate the transaction : use the portfolio library to process the transaction:

Javascript

Const Processtx = Waiting Web3.eth.processratransation ({{

TX: TX,

From: Senderaddress

});

`

• Wait for confirmation : wait for the transaction to be confirmed by the Ethereum network:

Javascript

Const ConfirmTx = Waiting Web3.eth.SendraWtransation (Processtx.Rawtransation);

`

Managing of not too low errors

When an error occurs is not too low ", it means that the sender's account has insufficient funds to process the transaction. To manage this scenario, you can:

• Check sufficient funds : before sending the transaction, check if the sender has sufficient funds:

Javascript

Const Mitterbalance = Abswait Web3.eth.getbalance (Senderaddress);

If (senderbalance <amounts) {

launch a new error (« insufficient funds »);

}

`

• Increment of the Nonce : If the error is checkednot too low?

By following these steps, you can effectively manage transactions for your wallet on a server running on Ethereum. Remember to manage errors and cases on board to ensure a user experience seamlessly.

Ethereum Invalid