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.The replacement creates a different custody architecture: operators must migrate the relevant assets or permissions, applications must accept actions arriving through another program, and risk teams must approve the new signing path.Durable nonces remain usable. The Foundation has not set a removal date or made a final choice between Anza’s Programmatic Signer and Blueshift’s Vector. Its roughly six-month migration window is conditional on a suitable replacement being ready, audited and live ...