Update
Solana Foundation Proposes Signer Programs for Durable Nonces
The Solana Foundation has proposed replacing durable nonces with signer programs to route cold-key approvals through a program-derived address. This update aims to preserve cold-key approval while changing which addresses control affected assets. The proposed replacement adds a program between the cold key’s approval and execution, with the original key still authorizing actions. The migration guide describes moving native SOL into the derived address and transferring token balances and permissions. The Foundation has not set a removal date or made a final choice between Anza’s Programmatic Signer and Blueshift’s Vector. The migration window is conditional on a suitable replacement being ready, audited, and live on mainnet. A failed transaction may leave an approval executable later, without an enforced deadline, until a separately authorized nonce advance lands.