[Solana Developers Propose Deprecating Persistent Nonce Transaction Functionality] According to a report by Jinse Finance on November 9th, CoinDesk reported that Solana developers have proposed deprecating the persistent nonce transaction functionality. This mechanism allows signed transactions to remain valid indefinitely, enabling custodians and exchanges to sign them offline. It was also used in the April attack on the Drift trading protocol, resulting in losses of at least $270 million. The proposal still requires technical approval and is expected to take effect on the mainnet no earlier than May 5, 2027. Related institutions will need to migrate to alternative solutions, and the Solana Foundation's migration requirements may delay the final deadline.