Ethereum: How to extract addresses from input in raw transaction

Extracting input addresses from raw transactions Ethereum

Ethereum transactions are complex and include more inputs, including “Vin” addresses (verifiable entry). In this article we will guide you through the process of extracting these addresses from the raw transaction in offline mode.

Overview of RAW Transaction components **

The raw Ethereum transaction consists of several components:

• TXN ID : A unique transaction identifier.

• Z : Sender address (eg “0x …”).

• DO : Recipient address’.

• ** Value : Value sent in a transaction.

• Gas ​​Limit : The gas limit used to perform a transaction.

Extracting input addresses

In order to extract the entry addresses from the raw transaction, we need to identify the component of the "vine" that is responsible for creating these addresses. Thevincomponent is usually created by the sender's private key and contains:

• ** Address: Sender address (hexadecimal chain).

• ** Suma : Value sent in a transaction.

• ** PUBLICKEYHash: Public Part of the Sender’s address.

Here is an example of a raw transaction:

`Raw

TXN ID: 0x1234567890ABCDEF

From: 0x … (sender address)

Do: 0x …

Value: 10 ether

Gas Limit: 20000

`

Extracting input addresses

In order to extract input addresses, we need to analyze the raw transaction and identify the vin component.

In the typical Implementation of Ethereum, the vin component is stored in the field ‘TX.vinof raw transaction. To access this field we can useethh.utils.tobuffer ()function from the library eéters.js:

Javascript

Const Tx = // Analyze a raw transaction

// Get the VIN field as a cache

Const Vinbuffer = Tx.vin;

// Create a field to store the input addresses

Const Inputaddresses = [];

// iterate over VIN records and extract the address

for (let i = 0; i

Const input = Vinbuffer [i];

IF (input.index === 0) {// west of the sender

Const privatekey = ethh.utils.Tohex (input.Privatekey);

Inspladdress.push (privatekey); // Add the sender’s address to the box

}

}

`

Extraction of Infline address

In offline mode, we need to extract addresses without requiring an Ethereum connection. One of the approaches is the use of a library like Ethers.js, which provides the“ OD ”and“ to ”feature to conversion between accounts and addresses Ethereum.

Here is an example of how to extract input addresses from the raw transaction using eéters.JS:

`Javascript

Const {eth} = require (‘Ethers’);

// Create an instance of an Ethereum contract

Const Contract = New et.Contract (“Contractaddress”, “0x …”); // replace the contract address

// load data on raw transactions (eg from a file or database)

Const txdata = // to load raw transactions here

// convert the TX.vin field to the field of entry addresses

Const Instuddresses = Awaiting Contract.from (TXDATA) .GET (“from”). then ((address) => {

return address.address;

});

Console.log (Inputaddresses); // output: field ([0x …])

`

Conclusion

In this article, we have demonstrated how to extract the entry addresses from the raw Ethereum transactions using an offline mode. By analyzing the transactions data and identifying the “Vin” component, then we can extract the sender’s addresses as hexadecimal chains.

Note that this is a simplified example and in the real world scenarios you may need to handle errors, marginal cases and other requirements (eg support for multiple inputs).