ad46141602
95f12de92505522a32ba58acd5251c69e602d160 BIP341 txdata cannot be precomputed without spent outputs (Pieter Wuille)
Pull request description:
In `PrecomputedTransactionData::Init`, if `force` is set to `true`, `m_bip341_taproot_ready` is always set to true, suggesting that all its BIP341-relevant members (including `m_spent_amounts_single_hash`) are correct. If however no `spent` array of spent previous `CTxOut`s is provided, some of these members will be incorrect. This option was introduced in #21365.
That doesn't actually hurt, as without prevout data, it's fundamentally impossible to generate correct BIP341 signatures anyway, and f722a9bd13/src/script/sign.cpp (L71) should prevent the logic from being used anyway.
Still, don't set `m_bip341_taproot_ready` variable when we clearly don't have enough data to compute it.
Discovered by Russell O'Connor.
ACKs for top commit:
ajtowns:
ACK 95f12de92505522a32ba58acd5251c69e602d160
achow101:
ACK 95f12de92505522a32ba58acd5251c69e602d160
instagibbs:
ACK 95f12de92505522a32ba58acd5251c69e602d160
Tree-SHA512: 90acd2bfa50a7a0bde75a15a9f6c1f5c40f48fb5b870b1bbc4082777e24a482c8282463ef7d1245e53201dbcb5c196ef0386352f8e380e68cdf00c2111633b77
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