This is a dummy post so the design has something to render. Delete it when the real writing starts.
Solana transactions expire fast. A recent blockhash is only valid for about a minute, which is fine for a wallet click and terrible for anything that queues work.
Durable nonces sidestep this: a nonce account holds a value that stands in for the blockhash, so a signed transaction stays valid until the nonce is advanced. That one property turns “sign and pray” into “sign now, execute whenever.”
let nonce = fetch_nonce_account(&client, &nonce_pubkey)?;
let msg = Message::new_with_nonce(instructions, Some(&payer), &nonce_pubkey, &authority);The interesting failure modes show up under bursts — which is a story for a real post.