Ethereum: How to create the part in “scriptSig”?

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Create GIS and PUBKEY PARTS: Ethereum operations unlock

When you get an Ethereum operation, it is divided into several components, including script data (scriptsig) and public keys. Understanding how to extract these parts can help decipher and check operations.

In this article, we will focus on creating GIS and advertising in the Scriptsig section.

Chapter Scriptsig

Scriptsig is the first part of the script data in Operation Ethereum. It contains a unlocking scenario that determines how to withdraw a private key from a private key used by the sender and the recipient.

The usual scriptssig chapter begins with this format:

`Hex



0x 



...

'



In your case, assuming that you have a private key in a paper portfolio and you want to get a someone else's operation, the Scriptsig section would look like this:

Hex



0x 

 tx_address 

 Some_key_id

'



Here:

is the public address of the sender.

is a unique identifier of your personal key.




In the game, Longuking_Script is the place where we will create our own signature.


 Signature Creation 

To create GIS, you must calculate the signature using your personal key. In the Ethereum signature process, it includes the calculation of your personal digestion of the key and comparing it to the planned signature.

Here is an example of how you can create GIS Strength, Language of programming for popular intellectual contracts:

Solidarity



Pragma Solidity ^ 0.8,0;

ApplicingScript {

    Createsignature function () Returns Public (bytes32) {

        // Calculate digestion by private key using the Keccak-256 mixture

        Bytes32 Princeydigest = Keccak256 (Both.Ecode_Paced (

            4, // 4 bytes for the address and the key identifier

            msg.sender.address,

            Msg.value // msg.value is not directly accessible to solidity, but we can use it as a local marker so far.

        )););)

        // create a signature using private key digestion

        Bytes32 Sig = Keccak256 (Both.Ecode_Packed (

            1, // 1 byte nonce (we will first define it on 0)

            Princeydigest

        )););)

        Return Sig;

    }

}

'



In this example:


We calculate the Private_Key_Digest using the Keccak-256 bag algorithm with the address and value of the sender.



We create a signature by calculating empty digestion (using 1 byte "nuncio") and comparing it to the digestive of the planned private key.


 Verification of the signature 

To check the signature, you can compare it with the signature used in the expected operation. In this case, we will use the same ictLocking_Script as before:

Hex



0x 

 tx_address 

 Some_key_id

'



We will create a new signature using the digestion of the private key and compare it to the planned signature:

Hex



Bytes32 sig = 0x ...

Bool isvalidsignature () Public video (Bool) {

    Returns the Keccak256 (two. Encode_packed (

        1, // 1 byte nuncio

        Sig

    )) == Baite32 ("..." // Digest of private key expected

    ));

}

` ‘

If the two signatures overlap, we can believe that the signature has been generated properly.

Conclusion

Create GIS and check that its accuracy is the necessary steps in ethreum surgery. Realizing how to extract scriptsig and advertising from the operation and create your signature using your personal key, you can check the authenticity of the transactions you have received. Do not forget, always use safe practices when you work with out -of -public information, as safe and safe protection for your personal keys.

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Ethereum: How to create the part in “scriptSig”?

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