Ariard mentioned he would like to see a test case for a 64-byte transaction spending a Taproot
output with an annex. I took the opportunity to also make the output be an OP_RETURN with a 2-byte
push, as another semi-realistic transaction.
The test vectors were initially designed to maximally simple, which led to much redundancy. That was
probably too close to one extreme on the spectrum between simplicity and efficiency.
Here we shave off 20k lines by simply representing the header chains as a tree instead of list of
lists by duplicating all common headers.
This is a batch update to the tests vectors for the limit on legacy signature-checking operations
introduced in BIP 54, following feedack received on the Bitcoin Inquisition PR and from Chris
Stewart's implementation in Bitcoin-S.
This introduces a set of test vectors for each of the 4 mitigations in the BIP. The sigops and
transaction size vectors were generated using the unit tests included with the Bitcoin Core
implementation of BIP54, available at https://github.com/darosior/bitcoin/tree/2509_inquisition_consensus_cleanup.
The timestamps and coinbases required mainnet blocks for maximum compatibility, and were generated
by two dedicated unit tests not included with the Bitcoin Core implementation above but available at
https://github.com/darosior/bitcoin/tree/bip54_miner.
