29ed608dc7
9d5021a05bscript: add SCRIPT_ERR_TAPSCRIPT_EMPTY_PUBKEY (billymcbip) Pull request description: We currently have two callsites for `SCRIPT_ERR_PUBKEYTYPE`: - A pre-tapscript policy error behind the `SCRIPT_VERIFY_STRICTENC` flag:4de26b111f/src/script/interpreter.cpp (L220)- A [consensus error](https://github.com/bitcoin/bips/blob/master/bip-0342.mediawiki?plain=1#L93) in Tapscript:4de26b111f/src/script/interpreter.cpp (L368)It would be good for readability and testability to have separate errors for both cases, as they are quite distinct (policy vs. consensus, format vs. emptiness). **This PR adds `SCRIPT_ERR_TAPSCRIPT_EMPTY_PUBKEY` for the consensus error path.** This change would make our error handling more consistent. We have more granular errors for other pubkey error paths already: `SCRIPT_ERR_WITNESS_PUBKEYTYPE`, `SCRIPT_ERR_DISCOURAGE_UPGRADABLE_PUBKEYTYPE`. We also have separate errors for MINIMAL_IF: `SCRIPT_ERR_MINIMALIF` for the policy error pre-tapscript, and `SCRIPT_ERR_TAPSCRIPT_MINIMALIF` for the consensus error post-tapscript. Tests: Added a test case to `script_tests` and ran `build/bin/test_bitcoin --run_test=script_tests --log_level=success`. ``` test/script_tests.cpp:144: info: check '[["aa","#SCRIPT# 0 CHECKSIG","#CONTROLBLOCK#",0.00000001],"","0x51 0x20 #TAPROOTOUTPUT#","P2SH,WITNESS,TAPROOT","TAPSCRIPT_EMPTY_PUBKEY","TAPSCRIPT: OP_CHECKSIG with empty pubkey must fail"] (with flags 165d5d)' has passed ... ``` Ran `DIR_UNIT_TEST_DATA="$(pwd)/../qa-assets/unit_test_data" build/bin/test_bitcoin --run_test=script_assets_tests --log_level=success`. Updated `feature_taproot.py` and ran `build/test/functional/feature_taproot.py`. Looking forward to your feedback. ACKs for top commit: sedited: ACK9d5021a05bdarosior: utACK9d5021a05bsipa: ACK9d5021a05bTree-SHA512: bc0b7f64454313fe392ffb2d23aa4eca3deadc5ea1d10b3fba0b3ab4cb0575a5ddcb002dc27b4fa7aa3c180840a83d1b3e5c89351009ce7ffe684d58e1980ace
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