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Make GetWitnessCommitmentIndex callable on blocks without a coinbase txn.

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This isn't actually needed anywhere, but it's less brittle.
This commit is contained in:
Gregory Maxwell 2017-04-02 21:28:17 +00:00
parent ebfd653798
commit ada0caa165
1 changed files with 5 additions and 3 deletions
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8
src/validation.cpp
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@ -2901,9 +2901,11 @@ bool IsWitnessEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& pa
static int GetWitnessCommitmentIndex(const CBlock& block) static int GetWitnessCommitmentIndex(const CBlock& block)
{ {
int commitpos = -1; int commitpos = -1;
for (size_t o = 0; o < block.vtx[0]->vout.size(); o++) { if (!block.vtx.empty()) {
if (block.vtx[0]->vout[o].scriptPubKey.size() >= 38 && block.vtx[0]->vout[o].scriptPubKey[0] == OP_RETURN && block.vtx[0]->vout[o].scriptPubKey[1] == 0x24 && block.vtx[0]->vout[o].scriptPubKey[2] == 0xaa && block.vtx[0]->vout[o].scriptPubKey[3] == 0x21 && block.vtx[0]->vout[o].scriptPubKey[4] == 0xa9 && block.vtx[0]->vout[o].scriptPubKey[5] == 0xed) { for (size_t o = 0; o < block.vtx[0]->vout.size(); o++) {
commitpos = o; if (block.vtx[0]->vout[o].scriptPubKey.size() >= 38 && block.vtx[0]->vout[o].scriptPubKey[0] == OP_RETURN && block.vtx[0]->vout[o].scriptPubKey[1] == 0x24 && block.vtx[0]->vout[o].scriptPubKey[2] == 0xaa && block.vtx[0]->vout[o].scriptPubKey[3] == 0x21 && block.vtx[0]->vout[o].scriptPubKey[4] == 0xa9 && block.vtx[0]->vout[o].scriptPubKey[5] == 0xed) {
commitpos = o;
}
} }
} }
return commitpos; return commitpos;