Messy merge conflicts because this PR backported some ad-hoc stuff from
upstream while keeping a few things that upstream deleted. Hopefully
reviewing is easier than doing this in the first place, since ultimately
all I did was delete code from one side or another of the conflicts.
(Ok, I also changed some boost optional stuff to std::optional, and had
to patch up a test file for test framework changes.)
When reviewing the detailed crypto, bear in mind that taptweaks, like all
hashes are the kind of crypto that cannot be subtly wrong -- it will either
fail very hard or be correct. And we have independent implementations in
C++ and Python that cross-check each other, si it's unlikely to be the former.
This updates libsecp to the latest API. This involves a sketchy (in
my view) cast of a const pointer to a const one, but (a) it is safe
given the actual usage of this pointer, and (b) I copied it directly
from Core -- see the final (20th) commit of the corresponding PR
https://github.com/bitcoin/bitcoin/pull/22448
This forward-ports the new Taproot sighash but does not fix a couple
22-blocked TODOs related to the MissingDataBehavior enum. Should be fixed
in a followup commit.
One nontrivial change I had to make was feeding the genesis hash to SignTransaction
(the "global" one in script/sign.cpp) so that it could correctly compute
the sighash at signing time.
Surprisingly easy to do. Almost all of the diff resolution was mechanically
* replacing boost::variant with std::variant
* replacing Optional with std::optional
* then replacing `nullopt` with `std::nullopt`
* updating the RPC functions for the new RPCArg::Default type
* update the tests/ directory to make new (since 22) tests use arrays for
createrawtransaction outputs
* other ad-hoc changes to function parameters etc (not too many of these)
I had to "really" change the code in PrecomputePSBTData, which was introduced
in 22.0 and affected by PSET, but this function was like 8 lines long so it
was easy.
Reviewing the diff may be a bit difficult because of the mix of mechanical
changes and ad-hoc things. Probably the most straightforward thing to do
is to redo the merge, `sed -i` to fix the boost::variant and Optional stuff,
then diff the remaining conflicts against this commit.
TODO: grep for `blindpsbt` and you will see that this RPC is still referenced
in documentation and help text even though it was deleted. Need to fix this
in 0.21 in a separate PR.
That results in a much safer interface (making the tweak commit
to the key implicitly using a fixed tag means it can't be used for
unrelated tweaking).
https://github.com/bitcoin/bitcoin/pull/22051 (5/9)
We actually preserve the "unrelated tweaking" method so we can
use it in OP_TWEAKVERIFY
This introduces Taproot wallet support. I fixed all the merge conflicts
and ensured that the tests pass, but this is still using the old sighash
(before Russell/Sanket/I redid it) so is not actually production ready.
Will be fixed when we bring Elements #1002 in.
Does the bare minimum to introduce Taproot wallet support with CT; just
adds a CPubKey blinding_pubkey to the taproot destination variant and
updates some visitors.
In future when we define blech32 we will need to make sure we are using
that encoding and using the pubkey.
CExtPubKey does not store the version bytes for the extended public key.
We store these so that a CExtPubKey can be serialized and deserialized with
the same version bytes.
That results in a much safer interface (making the tweak commit
to the key implicitly using a fixed tag means it can't be used for
unrelated tweaking).
71c824ed6c cleaned up and added missing "include" statements for pubkey.cpp and pubkey.h (William Bright)
Pull request description:
#### Problem:
Many symbols in the files were undefined and causing issues when I was working on building independent sections of the codebase. The hidden imports from the "secp256k1" library was a particular pain point.
The other standard and missing includes are following best practices and will help with refactoring, build process and others.
#### Changes:
Clean up and declared imports/include for `pubkey.cpp` and `pubkey.h`
ACKs for top commit:
jnewbery:
utACK 71c824ed6c
laanwj:
Code review ACK 71c824ed6c
Tree-SHA512: bce605cfde24d8e3be82a596cabab7a8577fec0aef7c5e6f7a56603357046d8e8dea11ac8e3dbe79600550291be7784e35c7a55ebf40b46525b8949e4bedae96
This includes key path spending and script path spending, but not the
Tapscript execution implementation (leaf 0xc0 remains unemcumbered in
this commit).
Includes constants for various aspects of the consensus rules suggested
by Jeremy Rubin.
This enables the schnorrsig module in libsecp256k1, adds the relevant types
and functions to src/pubkey, as well as in higher-level `SignatureChecker`
classes. The (verification side of the) BIP340 test vectors is also added.
d8daa8f371 pubkey: Assert CPubKey's ECCVerifyHandle precondition (practicalswift)
Pull request description:
Assert `CPubKey`'s `ECCVerifyHandle` precondition.
This makes it more clear for fuzzing harness writers and others that `ECCVerifyHandle` is expected to be held when interacting with `CPubKey`.
Related PR #17274.
ACKs for top commit:
sipa:
ACK d8daa8f371
Tree-SHA512: 9e74086599799dc9b5c3fb8357445b662e5bf896d826af63d6d6b6ddb616612966f3bb5de3bd3ae0e692c47de85672f64b8ab6d3a1c45899dc25ba46990b5ec7
