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Implement Tapscript script validation rules (BIP 342)

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This adds a new `SigVersion::TAPSCRIPT`, makes the necessary interpreter
changes to make it implement BIP342, and uses them for leaf version 0xc0
in Taproot script path spends.
This commit is contained in:
Johnson Lau
2020-09-11 14:34:02 -07:00
committed by Pieter Wuille
parent 330de894a9
commit 72422ce396
6 changed files with 234 additions and 19 deletions
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5
src/script/script_error.h
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@@ -57,6 +57,8 @@ typedef enum ScriptError_t
SCRIPT_ERR_DISCOURAGE_UPGRADABLE_NOPS,
SCRIPT_ERR_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM,
SCRIPT_ERR_DISCOURAGE_UPGRADABLE_TAPROOT_VERSION,
SCRIPT_ERR_DISCOURAGE_OP_SUCCESS,
SCRIPT_ERR_DISCOURAGE_UPGRADABLE_PUBKEYTYPE,
/* segregated witness */
SCRIPT_ERR_WITNESS_PROGRAM_WRONG_LENGTH,
@@ -72,6 +74,9 @@ typedef enum ScriptError_t
SCRIPT_ERR_SCHNORR_SIG_HASHTYPE,
SCRIPT_ERR_SCHNORR_SIG,
SCRIPT_ERR_TAPROOT_WRONG_CONTROL_SIZE,
SCRIPT_ERR_TAPSCRIPT_VALIDATION_WEIGHT,
SCRIPT_ERR_TAPSCRIPT_CHECKMULTISIG,
SCRIPT_ERR_TAPSCRIPT_MINIMALIF,
/* Constant scriptCode */
SCRIPT_ERR_OP_CODESEPARATOR,