Custodians and exchanges that rely on offline signing on Solana could face a change to their transaction workflows. A proposal from Solana developers would retire durable nonce transactions, but it still requires technical approval.
What the feature does—and why it is under scrutiny
According to a November 9, 2026, Jinse Finance report citing CoinDesk, durable nonces allow signed transactions to remain valid for an extended period, supporting offline signing by custodians and exchanges.
The report also says the mechanism was used in the April attack on trading protocol Drift, which caused losses of at least $270 million. That reported connection does not, by itself, establish that every use of durable nonces is unsafe.
Timing and migration remain uncertain
The proposal could take effect on Solana mainnet no earlier than May 5, 2027, subject to technical approval. Affected institutions would need to migrate to alternatives. The report notes that the Solana Foundation’s migration requirements could push the final deadline back.
For institutions relying on this feature, the practical issue is continuity of offline-signing workflows. The proposal is not yet an approved change, and the supplied report does not identify the replacement mechanisms.
Original publication: November 9, 2026, at 15:45:44 (UTC+8).
Source: Jinse Finance, citing CoinDesk.