Unspendable keys in descriptors

A pull request has been initiated on the Bitcoin BIPs repository to advance a current discussion. The proposed changes and related conversations are available for review at https://github.com/bitcoin/bips/pull/2340.

Developers and contributors interested in the evolution of Bitcoin Improvement Proposals can examine the latest developments, provide feedback, or participate in the ongoing review process by visiting the linked pull request. This platform serves as the primary space for tracking updates, engaging with technical debates, and monitoring the proposal's progress through community input.