e57b4c51ad regtest: change network magic away from liquid v1 (Andrew Poelstra)
Pull request description:
We don't want connectivity issues between Liquid and custom test networks.
ACKs for top commit:
stevenroose:
ACK e57b4c51ad
Tree-SHA512: 3ddd626496d7877551c41b089932784bcb752962089fd3e6baa5e9ea6acac44b1b4c5c915b061892b712849d12455fae00347885cecb0e0a3b59a134d91d4014
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 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.
This PR adds a fuzz test ensuring that all the different destination types
round-trip to strings (an important test given that Satoshi managed to mess
this up, having two different address types encode the same way..)
Anyway we fail this test, since both CNoDestination and NullData encode as
empty strings, and then this "decodes" as CNoDestination (and returns an
error, but the fuzztest doesn't check that). To make the fuzzer pass, I
changed NullData to encode and decode as "null".
I think this actually adds some functionality, letting you use "null" as
an "address" for sendtoaddress and createrawtransaction, thus burning the
coins and fixing #1011...but this was not my intent and we probably want
to think a bit more carefully before deliberately supporting this.
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.
