Solana moves to scrap the transaction feature used in the $270 million Drift hack

Solana validators are voting on a draft proposal to remove durable nonces, the transaction feature exploited in the $270 million Drift hack, with deprecation set for no earlier than May 5, 2027. The mechanism lets pre-signed transactions be submitted later, a design that custodians and offline signers rely on to move coins without constant key access. Its removal would force those custodians to rebuild their transaction flows before the deadline. The change matters because it trades a long-standing convenience feature for a smaller attack surface on one of the largest smart-contract chains. Watch for validator signaling on the proposal and for migration guidance from custody providers and offline-signing services ahead of the 2027 cutoff.