A Solana transaction consists of cryptographically signed instructions from accounts, updating the network.The structure of a Solana transaction includes signatures and a message containing the list of transactions to be processed.Solana maintains a maximum transmission unit (MTU) size of 1280 bytes for fast and reliable data transmission.Each Solana transaction requires 64 bytes for each signature and varying bytes based on transaction requirements for messages.The message header in a Solana transaction consists of three u8 integers that specify various transaction details.Recent Blockhash in Solana transactions prevents duplicated or stale transactions and ensures transaction order.Instructions within a Solana transaction contain program IDs, account address indexes, and data specific to the program.Solana transactions are processed quickly as the network uses a hybrid structure, allowing accounts to store data and executable code.RPC servers in Solana entry points relay signed transactions to leaders for validation and transaction sequencing.The Solana network uses various stages to process transactions efficiently, ensuring secure delivery and parallel processing.