1a89d5230c examples: Add taproot-psbt workflow example (Duncan Dean)
Pull request description:
Will address #893.
Currently includes a BIP86 example (no spendable script path)
Working on script path and key path spending when both are possible spending paths.
ACKs for top commit:
tcharding:
ACK 1a89d5230c
apoelstra:
ACK 1a89d5230c
Tree-SHA512: 31d23914faedb2632d517f9a827075f1bf387df6d98f151000f70546d1e67ac332e698c6a01bda40a9baf5b25bff0114928edc0879c5e01753ecfc6ad182fe26
Recently we moved a few types from `transaction` to `sighash`, while
doing so I erroneously annotated code with the `deprecated` attribute
hoping it would give downstream users a gentle upgrade experience. It
turns out `deprecated` only works on functions.
During that same work, we re-exported from the crate root a bunch of
types from the `sighash` module that probably should not have been
re-exported. We are currently trying to create a nice clean API surface,
in an effort to move in the right direction we should remove the
re-exports and just re-export the `sighash` module.
Try to clean up the sighash export mess by doing:
- Remove the re-exports from the `transaction` module
- Remove crate level re-exports of `sighash` module types
- Re-export `sighash` module
Note, this patch is a breaking API change, justified by the fact that
there is no good way to gently lead downstream when moving types since
types cannot be deprecated with the `deprecated` attribute.
This example shows how to use the PSBT API for taproot transactions.
We have a simple BIP86-style spend and an example of an inheritance
timelock that can be spent either by the beneficiary via the script
path after a timelock, or via the key path by the benefactor so that
they can refresh the timelock at any time.
Create a directory `bitcoin` and move into it the following as is with
no code changes:
- src
- Cargo.toml
- contrib
- test_data
- examples
Then do:
- Add a workspace to the repository root directory.
- Add the newly created `bitcoin` crate to the workspace.
- Exclude `fuzz` and `embedded` crates from the workspace.
- Add a contrib/test.sh script that runs contrib/test.sh in each
sub-crate
- Fix the bitcoin/contrib/test.sh script
Andrew Poelstra
Tobin C. Harding
Duncan Dean