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Disallow extended encoding for non-witness transactions

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This commit is contained in:
Pieter Wuille 2018-08-23 17:01:14 -07:00
parent 540bf8aacc
commit bb530efa18
1 changed files with 4 additions and 0 deletions
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4
src/primitives/transaction.h
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@ -220,6 +220,10 @@ inline void UnserializeTransaction(TxType& tx, Stream& s) {
for (size_t i = 0; i < tx.vin.size(); i++) { for (size_t i = 0; i < tx.vin.size(); i++) {
s >> tx.vin[i].scriptWitness.stack; s >> tx.vin[i].scriptWitness.stack;
} }
if (!tx.HasWitness()) {
/* It's illegal to encode witnesses when all witness stacks are empty. */
throw std::ios_base::failure("Superfluous witness record");
}
} }
if (flags) { if (flags) {
/* Unknown flag in the serialization */ /* Unknown flag in the serialization */