Transaction Retry / Rebroadcast

The practice of resubmitting a transaction multiple times until it lands or its blockhash expires, necessary because Solana does not guarantee delivery of any single submission and drops can occur at any pipeline stage. By default, Solana RPC nodes rebroadcast submitted transactions periodically, but this is unreliable; production applications implement client-side retry loops that resubmit the same signed transaction (with unchanged signature) at short intervals until confirmation is received or the blockhash expires (roughly 60–90 seconds after creation).