diff options
Diffstat (limited to 'src/consensus/validation.h')
| -rw-r--r-- | src/consensus/validation.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/consensus/validation.h b/src/consensus/validation.h index 2a93a090d6..e007c481df 100644 --- a/src/consensus/validation.h +++ b/src/consensus/validation.h @@ -12,6 +12,12 @@ #include <primitives/transaction.h> #include <primitives/block.h> +/** Index marker for when no witness commitment is present in a coinbase transaction. */ +static constexpr int NO_WITNESS_COMMITMENT{-1}; + +/** Minimum size of a witness commitment structure. Defined in BIP 141. **/ +static constexpr size_t MINIMUM_WITNESS_COMMITMENT{38}; + /** A "reason" why a transaction was invalid, suitable for determining whether the * provider of the transaction should be banned/ignored/disconnected/etc. */ @@ -151,4 +157,25 @@ static inline int64_t GetTransactionInputWeight(const CTxIn& txin) return ::GetSerializeSize(txin, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) * (WITNESS_SCALE_FACTOR - 1) + ::GetSerializeSize(txin, PROTOCOL_VERSION) + ::GetSerializeSize(txin.scriptWitness.stack, PROTOCOL_VERSION); } +/** Compute at which vout of the block's coinbase transaction the witness commitment occurs, or -1 if not found */ +inline int GetWitnessCommitmentIndex(const CBlock& block) +{ + int commitpos = NO_WITNESS_COMMITMENT; + if (!block.vtx.empty()) { + for (size_t o = 0; o < block.vtx[0]->vout.size(); o++) { + const CTxOut& vout = block.vtx[0]->vout[o]; + if (vout.scriptPubKey.size() >= MINIMUM_WITNESS_COMMITMENT && + vout.scriptPubKey[0] == OP_RETURN && + vout.scriptPubKey[1] == 0x24 && + vout.scriptPubKey[2] == 0xaa && + vout.scriptPubKey[3] == 0x21 && + vout.scriptPubKey[4] == 0xa9 && + vout.scriptPubKey[5] == 0xed) { + commitpos = o; + } + } + } + return commitpos; +} + #endif // BITCOIN_CONSENSUS_VALIDATION_H |