Request: Access to BC UR Legacy Documentation

[noncelab]

Hello,

We are running the Coconut project, which has just launched a Bitcoin watch-only wallet. Our wallet is compatible with major hardware wallets widely used by users.

However, we have discovered a usability issue when users with older hardware wallets try to use it. Upon inspecting the UR data, we found that the format differs from the current documentation and appears to be an older legacy format.

We could not find any reference to this legacy UR format anywhere in your project. Would it be possible for us to gain access to this documentation? It would greatly help us ensure proper compatibility for our users.

Thank you for your support!