Understanding BIP-446 and OP_TEMPLATEHASH
An overview of BIP-446 explains OP_TEMPLATEHASH, a proposed Bitcoin opcode for committing to transaction templates, its trade-offs compared with CTV, and implications for BitVM constructions.
spark.money/glossary
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BIP 446 (OP_TEMPLATEHASH)
A Taproot-native alternative to CTV that provides transaction template verification with a cleaner implementation. BIP 446 is a draft Bitcoin Improvement Proposal that defines a new opcode called OP_TEMPLATEHASH for use within Tapscript.