Against Allowing Quantum Recovery of Bitcoin

The concept of an implied age timelock in blockchain transactions, as discussed by Jameson Lopp, presents theoretical appeal but faces practical challenges when it comes to implementation. Unlike the current explicit timelocks which clearly define the lock criteria via actual block heights or timestamps within the transaction itself, an implied age timelock would necessitate a significant shift in how nodes operate. Specifically, for such a system to function efficiently without degrading network performance, all participating nodes would need to adopt a new indexing method based on the block height of Unspent Transaction Outputs (UTXOs). This change would enable them to effectively determine the spendability of UTXOs without extensive performance losses. However, this requirement for substantial modification in node operation makes the practical application of implied age timelocks questionable within the existing infrastructure of blockchain networks.