We (Blockchain Commons) have been talking with @zancas about a wallet interchange data format for cross-wallet portability and interop.

We are focused on L0, and have had success in the Bitcoin ecosystem with 14+ wallets supporting one or more of our interop standards (including Ledger now supporting our secret-sharing standard SSKR).

One of our candidates for export into this format, is of course, Zcashd. However, given its origins in older version of bitcoin, I presume that it is not seed based like other Zcash wallets, but master-key based? And also pre-descriptor? Is there a list anywhere of account-based improvements since the fork from bitcoin? Who is intimately aware of its limitations?

If you are interested in supporting this effort, we will be scheduling a meeting second week of December, and have a private Signal channel now—contact @zancas or me for invite.

— Christopher Allen

I think it's best for the wider community if this enumeration is part of a one-time survey of the extant wallet formats.

We are expect to make a proposal to ZF grants committee for an extensive survey of wallet formats, as well as proposal for a elidable binary exchange format and a rust library for serialization / deserialization.

I've collected some wallet.dat files in this repository: https://github.com/dorianvp/zcash-wallet-formats. This is part of the ongoing work we're doing with @ChristopherA for the survey mentioned earlier. If you have any old or unused wallet.dat files that could contribute, feel free to submit a pull request.