Here is an article based on your needs:

Optimizing Solana Transaction History Analysis with Multi-Machine Architecture

As a developer building a service that listens to and manages Solana transactions, I ran into an issue with my multi-machine architecture. By default, both instances would process logs in isolation, which could lead to inconsistencies in data collection and potentially result in missed transactions.

The Problem: Inconsistent Data

If one instance is down, it will continue to receive new transaction logs, but the other instance will not have access to them. This can lead to issues if we rely on the same batched transactions for processing or validation.

To solve this problem, I turned to Solana’s built-in logging mechanism and implemented a simple solution to analyze transaction history per block:

Analyzing transaction history per block

Here’s a glimpse of my approach:

• Set up logging

  : Set up both instances with the same logger to capture logs.

• Create a transaction analysis function: Write a separate function that listens for Solana transactions and updates our database or in-memory data structure accordingly.

This is where things get interesting: we can now analyze transaction history per block without any conflicts:

const transactions = {}; // Initialize an empty object to store all transactions
const logger = ...; // Set up the logger instance
async function logTransaction(transaction) {
try {
const transactionHash = transaction.hash;
if (!transactions[transactionHash]) {
transactions[transactionHash] = {};
}
for (const key in transactions[transactionHash]) {
transactions[transactionHash][key].push(transaction);
}
} catch (error) {
logger.error('Error processing transaction:', error);
}
}
async function scanTransactionHistoryByBlock(blockNumber) {
const blockInfo = wait getBlockInfo(blockNumber);
const transactionsInThisBlock = [];
for (const entry of blockInfo.transactions) {
if (entry.type === 'transaction') {
logTransaction(entry);
}
// Add any other relevant data from the transaction to our database
}
}

Example Use Case

Here is an example of how we can use this function to scan transaction history by a specific block number:

const blockchain = ...; // Assume we have access to the blockchain instance
async function main() {
const blockNumber = 12345;
wait scanTransactionHistoryByBlock(blockNumber);
}

This approach ensures that our service remains consistent even when an instance is down, providing a reliable way to process and validate transactions on Solana.