Bitcoin: Is there a helper method to confirm PSBTs?

Confirmation of transactions (PSBT) of the private sector correctly formatted with base64

In the world of cryptocurrency, blockchain transactions in the private sector (PSBT) are a crucial aspect of safety and verification of financial transactions. However, as the use of bitcoin and other cryptocurrencies develop, ensure that PSBTs are formatted correctly becomes increasingly important.

What makes a PSBT formatted correctly?

A correctly formatted PSBT consists of a header with several fields, including the public key, transaction data and metadata. Here is a ventilation of each field:

* Public key : A 256 -bit hexadecimal chain that represents the public key of the recipient.

* Transaction data : A table of variable length of unique integers that represent the amount of transaction, costs and other relevant data.

* Metadata : A fixed table length of bytes containing metadata, such as the Identifier of the sender (public key) and the hatching of the previous block.

Basic coding64: A useful method to verify PSBT

To verify the format of a PSBT, you can use base coding64. Base64 is a widely used coding scheme that converts binary data into text chains. In Java, you can use the java.util.base64 'class to code and decode the chains.



 Example of Java Code: Verification of a PSBT with Base64 

Here is an example of how you can verify a psbt correctly formatted based64 using Java:

Java



Import Java.nio.Chen.standardches;

Import Java.secury.messagest;

Import Java.security.Nuuchalgorithmexception;

Main public class {

    PUBL

        PSBTSTR chain = "your_psbts_sting_here"; // replaced by the PSBT Real channel

        byte [] decodedbase64bytes = base64.getDecoder (). Decode (PSBTSTR);

        MessageTAST Digest = MessageTAST.GetiStance ("SHA-256");

        Formattedpsbt chain = digest.digest (decodbase64bytes) .tostring ();

        // Compare with the expected departure

        String waitsuoutput = "your_expected_output_here"; // replaced by the expected real output

        If (! Formattedpsbt.equals (expected)) {

            System.out.println ("PSBT is not correctly formatted");

        } other {

            System.out.println ("PSBT is correctly formatted");

        }

    }

}

'



 Library / mmethod to verify the PSBT in Java

To simplify the verification process, you can use a library likecom.github.snookbase64or create your own personalized method. Here is an example using a personalized method:

Java



Import Com.github.snookbase64.base64util;

Main public class {

    PUBL

        PSBTSTR chain = "your_psbts_sting_here"; // replaced by the PSBT Real channel

        byte [] decodedbase64bytes = base64util.decode (psbtstr);

        Boolean isproperlyformatted = True;

        for (int i = 0; i 

            Int publickeylength = math.min (32, decodebase64bytes [i] / 256);

            If (decodedbase64bytes [i + publickeylength]! = (Byte) 255 ||

                isproperlyformatted = fals;

            }

        }

        System.out.println (isproperlyformatted? "PSBT is correctly formatted.": "PSBT is not correctly formatted");

    }

}

'



In this example, we verify the duration of the public key and verify that the transaction data corresponds to the expected output.

Conclusion

Verification of a PSBT format can be a difficult task, especially when working with basic coding64. However, the use of libraries such ascom.github.snookbase64 ‘or the creation of personalized methods can simplify the process.

آدرس : مشهد - ابتدای بلوار ملک اباد - شماره 213

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