Addresses of Ethereum Scriptpubkey: How to extract them from Segwit’s transactions
As a developer or data analyst that works with Ethereum transactions, it is likely to be familiar with the concept of scriptpubkey addresses (SPTK). These directions are used in Ethereum transactions and are generated by solving complex mathematical puzzles, known as “work test” (POW), using their own unique cryptographic keys.
However, not all SPKs can easily be extracted from unprocessed transaction data using standard methods. This is because Segwit transactions, introduced in 2017, use a separate script (known as “scriptsig”) to store additional metadata and parameters for each transaction. The scriptsig section contains information such as the public address of the sender, the signature scheme and other personalized fields.
To overcome this limitation, we will explore some advanced techniques to extract SPRK addresses from Segwit transactions using the Ethereum command sequences language, solidity.
Why can’t we use the scriptpubkey?
In the past, it was possible to extract SPTK addresses directly from unprocessed transactions data by analyzing the scriptsig section. However, with the introduction of secwit transactions, additional metadata stored in this section are no longer accessible to standard Ethereum tools and libraries.
Method 1: Use of the eth-sig library
One way to overcome this limitation is to use a third-party library called ‘eth-sig. This library provides an API to extract SPRK addresses from Segwit transactions. Here is an example of how you can use it:
JavaScript
const {ethsig} = require ('eth-sig');
// Load the transaction data
const txdata = ...;
// Extract the scriptsig section
const scriptsig = txdata.scriptsig;
// Analyze the scriptsig using theeth-siglibrary
const siginfo = ethsig.pse (scriptsig);
// Extract the SPTK address from the signature scheme
const spkaddress = siginfo.spkaddress;
Console.log (Spkaddress);
Method 2: Use of a personalized script
Another approach is to implement a personalized script that extracts the SPTK address from the secwit transaction. This script would need to be compiled and implemented as a solidity contract, which can then be used together with its existing code.
Here is an example of how could a personalized script implement:
SOLIDITY
Pragma solidity ^0.6.0;
Hire Spptkextractor {
Getspkaddress Function (bytes Txdata Memory) Public Vista Returns (address) {
// Load the transaction data
bytes32 txhash = txdata.read (0);
// Analyze the transaction hash as an Ethereum firm
Spkaddress address;
bytes4 [] RSP memory = new bytes4 [64];
uint8 [] Sigs memory = txhash.read (1);
for (uint256 i = 2; i <65; i ++) {
rsp [i] = bytes4 (sigs [i] .byte ());
}
// Extract the SPTK address from the signature scheme
Spkaddress = Keccak256 (RSP);
return spkaddress;
}
}
Method 3: Use of a third -party library and web3.js
Finally, you can also use a third -party library such asweb3.jsto extract SPTK addresses from Segwit transactions. This method requires more configuration and configuration, but provides access to the required libraries and APIs.
Here is an example of how we could use 'web3.js with the library’ eth-sig:
JavaScript
const web3 = require ('web3');
const {ethsig} = require ('eth-sig');
// Load the Web3 instance
const web3instance = new web3.web3 (new web3.providers.httprovider ('
// Load the transaction data
const txdata = ...;
// Extract the scriptsig section
const scriptsig = txdata.scriptsig;
// Analyze the scriptsig using theeth-sig` library
const siginfo = ethsig.