Solana’s offline-signing proposal would keep approvals valid after failed transactions

Solana’s plan to retire durable nonces, which let transactions be signed offline and broadcast later, would preserve cold-key approval while changing which addresses control the affected assets. For exchanges, custodians and treasury operators using that signing method, the proposed replacement adds a program between the cold key’s approval and execution. The Solana Foundation’s October deprecation plan points to onchain signer programs that verify an offline signature and execute its approved instructions. A program-derived address, or PDA, would control the affected accounts. The original key would still authorize actions, while a separate online operator submits them and pays the network fee.