SEGWIT transactions verification in Ethereum
The characteristic of segregated witnesses of Ethereum (SEGWIT) allows the separation of transaction and payload metadata, which makes it more efficient and safe. However, verifying if a transaction is in fact Segwit can be a bit complex. In this article, we will explore the simplest method to verify the White to Segwit transaction or not.
Why Segwit transactions are different
Before immersing ourselves in verification methods, we quickly understand what makes a secwit transaction:
- A secwit transaction has a separate heading section (
SEGSIG) that contains metadata on the addresses of the sender and receiver.
- The payload (for example, the data that is transferred) are stored in the body of the transaction.
Simple method: verify the body of the transaction
A direct way to verify if a transaction is secwit is to verify its payload. If it is a Segwit transaction, the ‘SegSigfield will be present in the transaction body and contain a specific prefix.
To implement this method:
- Download Ethereum's blockchain data (for example, [Eserscan] ( or [blockcypher] (
- Load the JSON file downloaded in a programming language such as Python, JavaScript or R.
- Analyze the transaction data and verify if you have a 'SegSig field in its payload.
Here is some sample code in Python:
`Python
Import Json
Def is_segwit (Tx):
Assuming that transaction data is stored as a JSON object
Transaction_data = tx ['transaction'] [data ']
Verify if it is a SECSIG field in the transaction payload
Yes 'SegSig' not in transaction_data or transaction_data ['segsig']!
Return false
no secwit
Return True
Segwit
Example use:
Transaction = {
'Transaction': {
'Data': Json.dumps ({{
'Of': '0x ...',
'A': '0x ...',
'Value': 10,
'Gasprice': '0x ...',
'Gas limit': '0x ...',
'Nance': '0x ...',
'Blockknumber': '0x ...',
optional
'Timestamp': '0x ...',
optional
}),
},
}
if if is_segwit (transaction):
Print ("Segwit transaction found!")
Others:
Print ("not secwit transaction").
Seregwit: a more robust verification method
For a more robust solution, we can use theSeregwitlibrary, which provides a simple API to verify if a transaction is secwit. You must install it with NPM or thread:
Bash
NPM Install Seregwit
Here is a fragment of example code in Javascript:
JavaScript
Councilwit = require ('seregwit');
ASYNC VERYSEWIT FUNCTION (TX) {
Attempt {
consta result = alea sergwit.verifytx (tx);
if (resulting state === 0) {
Return true; // Segwit transaction found!
} Others {
Return false; // No secwit transaction
}
} Capt (error) {
Console.error (error); // Manage errors
Return false;
}
}
// Example use:
Const tx = {
// Your Ethereum transaction data here ...
};
Varysewit (Tx)
.Then ((result) => Console.log (result))
.Catch ((error) => Console.error (error));
Conclusion
Verify if a transaction is secwit can be easily done use the provid methods. The first method is based on verifying the transaction payload, while the second method uses theseregwitlibrary to verify if a transaction has a specific heading section ( SegSig). Choose the approach that best suits your use case.
Tips and variations
- For a more robust verification, consider using a combination of both methods: verify the payload of SECWIT's specific metadata and then verify with theseregwit` library.