Solana: How can a rust program get access to the `syscall_base_cost` value?

Obtaining access to calculate rust budget values ​​

Wenbuilding A Solana program, one of the crucial components is the jam budget, defines in this article, we will explore how specific values ​​within the competition budget use rust.

SystemCallBasecost Value

Valor’Syscal_Base_Costrepresses money in Solana. This Walue determines how much gas is required to perform a system. Although it is not directly accessible from outside the program, it can be obtained programmatically to Solana SDK.

Here is an example of code snippet that sets a standard competition budget computing with some sample values:

’Rust

Use solana_program :: {

Account_info: {next_account_info, accountinfo},

Entrypoint :: Programresult,

Exec_info: {self, programmid, entrypointry, entrypointerror},

Program_error :: Printerror,

Pubkey :: Pubkey,

};

Use :: Collections :: Hashmap;

// Define the competition budget

Const Compute_Budget: & Mut hashmap , u64> = {

Budget MUT = hashmap :: new ();

Budget.insert (next_account_info (). Pubkey, 100_000); // 100k for execution

Budget.insert (next_account_info (). Pubkey, 50_000); // gas 50k to invade a transaction

};

Accessing Computer Budget Values ​​

Solana: How can a rust program get access to the `syscall_base_cost` value?

*

To access Walues ​​the competition budget, you can ‘ETTmethod provided by implementation' hashmap '. For example:

’Rust

FN Main () -> Programresult {Programresult

// Get the competition for exception of a system call

lettget.get.get (& next_account_info (). Pudkey)?;

Println! ("Syscal cost: {}, syscal_base_cost);

// Obtain the total for credit an account

Leave the account_create_cost = budget.get (& next_account_info (). Account_pubkey)?

Println! ("Creation cost account: {}", account_create_cost);

// Get the minimum cost necessary to compete for the system call

Leave min min ()?;

Println! ("Min syscal cost: {}", min_syscal_cost);

}

Example of use of cases

Here is an example that you can, for example, Walues ​​to optimize your program:

  • When the executive is called, the mother, the syscal_base_cost, the minimum request is higher.

  • If a transaction of a transaction requires more gas, the competing in the competitive budget, the consisting to use a separate gas account.

Best Practices *

To ensure safe and efficient use of competitive budget values:

  • Follow your budget to compete at regular intervals.

  • Check the execution of scal_base_cost before the minimum required.

  • Use separate accounts or contexts for sensitive calculations that require more than gas available in the competitive budget.

Following the guidelines and, using Solana SDK, you can effectively, your budget compete for Walue values ​​within your rust program.

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