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doc: IsFinalTx comment about nSequence & OP_CLTV

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It's somewhat surprising that a transaction's nLockTime field is ignored
when all nSequence fields are final, so this change aims to clarify this
behavior and cross reference relevant details of OP_CHECKLOCKTIMEVERIFY.
This commit is contained in:
Yuval Kogman 2020-02-07 19:10:31 +00:00
parent c6d6bc8abb
commit f9e37f33ce
2 changed files with 12 additions and 3 deletions
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6
src/script/interpreter.cpp
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@ -1741,9 +1741,9 @@ bool GenericTransactionSignatureChecker<T>::CheckLockTime(const CScriptNum& nLoc
if (nLockTime > (int64_t)txTo->nLockTime)
return false;
// Finally the nLockTime feature can be disabled and thus
// CHECKLOCKTIMEVERIFY bypassed if every txin has been
// finalized by setting nSequence to maxint. The
// Finally the nLockTime feature can be disabled in IsFinalTx()
// and thus CHECKLOCKTIMEVERIFY bypassed if every txin has
// been finalized by setting nSequence to maxint. The
// transaction would be allowed into the blockchain, making
// the opcode ineffective.
//