Support Bitcoin Taproot (Generating a Taproot Address)

[hitripod]

Sending to Taproot address is mostly covered in wallet-core, but we should support Taproot as the default address, incl. receiving to Taproot address.

Sending to Taproot address is mostly covered in wallet-core, but I'm not yet 100% certain.

Is your feature request related to a problem? Please describe.

#1785

Describe the solution you'd like

Support taproot: https://github.com/trustwallet/wallet-core/blob/master/registry.json

[CryptoManiac]

Unless you need to tweak the public key for some reason, not much actually needed to be done. With that in mind, P2TR essentially becomes a reincarnation of P2PK. Payments are done to prefixed public key and the witness data only consists of the signature.

[CryptoManiac]

Unless you need to tweak the public key for some reason, not much actually needed to be done. With that in mind, P2TR essentially becomes a reincarnation of P2PK. Payments are done to prefixed public key and the witness data only consists of the signature.

In fact I did exactly that yesterday: https://bb-btc.mycelium.com:19130/tx/71fbd171e3af71d1547e98fcd7504581899274b7b8e7905dff49c3e8ff00d5a6

I forked this repo, added libsecp256k1 dependency and implemented taproot sighash function. Adding new branch to sigStep function was a trivial matter after that. Not going to publish my code though. Not anytime soon, at least, as it is too sensitive in terms of money and I was very drunk while writing it.

[lamafab]

We just merged this major PR: #3233

We support Taproot generation internally, but don't expose it via the C interface yet (BRC20 was prioritized). Working on that next.

[dinghaoz]

When taproot interface will be supported?