Solana: Doubts about getTransactionCount, not working as intended

Here is the article for your request:

Title:

Solana: Suspicious about getTransactionCount, not working as intended

Introduction

Solana is a popular blockchain platform known for its fast and secure transactions. When building a program that interacts with the Solana network, it is important to understand how the different functions work. In this article, we will explore two important Solana functions: getTransactionCount and its use with slotSubscribe. We will also discuss some of the doubts we encountered while trying out these functions.

Getting Root Slot Number

To get the root slot number in Solana, you can use the slotSubscribe function provided by the Solana SDK. Here is an example of its usage:

use solana program::{
account_info::{next_account_info, AccountInfo},
entrypoint,
startpoint::ProgramResult,
program_error::Print Error,
pubkey::Pubkey,
};
startpoint!(program);
fn main() -> ProgramResult {
// Get the root location number from the account information
let (location_number, _) = next_account_info(&AccountInfo::new_indexed());
println!("Root location number: {}", location_number);
Ok (())
}

In this example, we are ordering a “location” transaction at a specific location (“1”). When the location number is 1, we get the corresponding account information. Let’s dive deeper into the usage of getTransactionCount.

Using getTransactionCount

Solana’s getTransactionCount function returns the total number of completed transactions for a given block. To use this function, you must first obtain the index of the block and then call “getTransactionCount”. Here is an example:

use solana_program::{
account_info::{next_account_info, AccountInfo},
entrypoint,
startpoint::ProgramResult,
program_error::Print Error,
pubkey::Pubkey,
};
startpoint!(program);
fn main() -> ProgramResult {
// Get the block index (in this case 1)
let block_index = next_account_info(&AccountInfo::new_indexed()).pubkey;
// Call getTransactionCount with the block index
let transaction_count = solana_program::get_transaction_count(block_index)?;
println!("Number of transactions: {}", transaction_count);
Ok (())
}

In this example, we get the account information for the second slot (2). Then we call `getTransactionCountwith the block index. This function returnsu128, which represents the total number of completed transactions.

• getTransactionCount vs getSlotTransactions: We usegetTransactionCountbut we get no result because there are no transactions in Solana. In contrast,slotSubscribeis designed to work withslotevent, which is triggered when a new slot is created or an existing one is updated.

• Block Index: The block index returned bynext_account_info` does not always correspond to the slot number. We need to use “block_index” instead to get the correct result.

• Count of transactions: As we have seen, “getTransactionCount” can return zero because there are no transactions in Solana.

Conclusion

In this article, we explored two important Solana functions: “getTransactionCount” and its use with “slotSubscribe”. We discussed some of the doubts we encountered while trying out these functions and provided examples of their correct use. Once you understand the basics of Solana programming and these functions, you are well on your way to creating effective programs that interact with the Solana network.