Solana Transactions Explained for Backend Developers

Learning Solana transactions completely changed how I think about backend systems.

At first, I treated transactions like normal API requests:

client → server → database → response.

But Solana transactions are different.

They’re signed, temporary, atomic state changes sent to a decentralized network. Instead of “calling a server,” you prepare instructions that validators execute on-chain.

The biggest shift for me was understanding:

• recent blockhashes
• signatures
• atomic execution
• compute limits

One thing that made it click for me was actually building and sending transactions with "@solana/kit".

import {
  createSolanaRpc,
  devnet,
  generateKeyPairSigner,
  airdropFactory,
} from "@solana/kit";

const rpc = createSolanaRpc(devnet("https://api.devnet.solana.com"));

const signer = await generateKeyPairSigner();

const airdrop = airdropFactory({ rpc });

await airdrop({
  recipientAddress: signer.address,
  lamports: 1_000_000_000n,
});

console.log("Airdrop complete");

Oddly enough, failed transactions taught me the most.

Breaking transactions on devnet helped me understand how Solana programs actually execute internally.

Web3 development feels very different once you stop thinking in request/response patterns.