Solana: Versioned Transaction

Versioned transaction in Solana

After many developers have come across a common problem, they tried to find concrete examples of versioned transactions in the official Solana SDK.

The problem: Legacy Transactions vs. Versioned Transactions

In Solana, legacy transactions and versioned transactions are two different concepts with which complex intelligent contracts can be managed.

* Legacy transactions : These are standard transactions that use a certain version number (V0). You have been the norm from Solana since the early days.

* Version transactions

: These are new functions that have been introduced in current updates that offer more flexibility and adaptation. Version transactions can be used to present complex logical, conditional decisions or even arbitrary data structures.

The problem: Signing Legacy transactions with V0 key

One of the main challenges is that the key to signing Legacy transactions (V0) cannot be used to sign version transactions. This restriction results from the way Solana’s cryptographic primitive is designed.

* Legacy transaction signatures : If a legacy transaction uses the type “Signer :: V0”, it requires a certain series of keys that have been generated and kept secret by the project.

* Version transaction signatures : With version transactions you have to create a new key couple or reuse an existing V0 transactions. However, this process is not easy.

The solution: Use Signer :: V1

To overcome these restrictions, developers can use the “Signer :: V1” type in Solana SDK. This enables you to sign Legacy transactions with the same key that signs significant transactions.

Here is a sample code snippet:

`Rost

Use Solana_Program :: {

Account_info :: {Next_Account_info, Accountinfo},

Entry point,

Msg,

Program_error :: Programberor,

Pubkey :: pubkey,

};

Entry point! (Process_Instruction);

fn process_instruction (

_Program_id: & Pubkey,

Accounts: & [Accountinfo],

Command_data: & [U8],

) -> Result <(), Programmerror> {

// Create a new V1 signator

Leave Mut Signator = Signator :: V1 (pubkey :: New (“Your_Key_Here”));

// Sign the instruction data with the V1 key

Signer.sign (& ort_data)?;

OK(())

}

`

In this example, we create a new “Signer” instance with the “V1” type and pass our own secret key. Then we use this “signator” to sign the instruction data.

Diploma

While versioned transactions in Solana offer more flexibility than Legacy transactions, you require careful management and signature setup. By using the type “Signer :: V1”, developers can overcome the restrictions and successfully implement versioned transactions in their applications.