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Merge bitcoin/bitcoin#21090: Default to NODE_WITNESS in nLocalServices

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a806647d26 [validation] Always include merkle root in coinbase commitment (Dhruv Mehta)
189128c220 [validation] Set witness script flag with p2sh for blocks (Dhruv Mehta)
ac82b99db7 [p2p] remove redundant NODE_WITNESS checks (Dhruv Mehta)
6f8b198b82 [p2p] remove unused segwitheight=-1 option (Dhruv Mehta)
eba5b1cd64 [test] remove or move tests using `-segwitheight=-1` (Dhruv Mehta)

Pull request description:

  Builds on #21009 and makes progress on remaining items in #17862

  Removing `RewindBlockIndex()` in #21009 allows the following:

  - removal of tests using `segwitheight=-1` in `p2p_segwit.py`.
  - move `test_upgrade_after_activation()` out of `p2p_segwit.py` reducing runtime
  - in turn, that allows us to drop support for `-segwitheight=-1`, which is only supported for that test.
  - that allows us to always set `NODE_WITNESS` in our local services. The only reason we don't do that is to support `-segwitheight=-1`.
  - that in turn allows us to drop all of the `GetLocalServices() & NODE_WITNESS` checks inside `net_processing.cpp`, since our local services would always include `NODE_WITNESS`

ACKs for top commit:
  mzumsande:
    Code-Review ACK a806647d26
  laanwj:
    Code review ACK a806647d26, nice cleanup
  jnewbery:
    utACK a806647d26
  theStack:
    ACK a806647d26

Tree-SHA512: 73e1a69d1d7eca1f5c38558ec6672decd0b60b16c2ef6134df6f6af71bb159e6eea160f9bb5ab0eb6723c6632d29509811e29469d0d87abbe9b69a2890fbc73e
This commit is contained in:
W. J. van der Laan
2021-07-22 17:36:32 +02:00
parent bfa52cbddf a806647d26
commit 5d83e7d714
9 changed files with 103 additions and 127 deletions
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45
src/validation.cpp
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@@ -1645,13 +1645,8 @@ static unsigned int GetBlockScriptFlags(const CBlockIndex* pindex, const Consens
pindex->phashBlock == nullptr || // this is a new candidate block, eg from TestBlockValidity()
*pindex->phashBlock != consensusparams.BIP16Exception) // this block isn't the historical exception
{
flags |= SCRIPT_VERIFY_P2SH;
}
// Enforce WITNESS rules whenever P2SH is in effect (and the segwit
// deployment is defined).
if (flags & SCRIPT_VERIFY_P2SH && DeploymentEnabled(consensusparams, Consensus::DEPLOYMENT_SEGWIT)) {
flags |= SCRIPT_VERIFY_WITNESS;
// Enforce WITNESS rules whenever P2SH is in effect
flags |= SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS;
}
// Enforce the DERSIG (BIP66) rule
@@ -3101,25 +3096,23 @@ std::vector<unsigned char> GenerateCoinbaseCommitment(CBlock& block, const CBloc
std::vector<unsigned char> commitment;
int commitpos = GetWitnessCommitmentIndex(block);
std::vector<unsigned char> ret(32, 0x00);
if (DeploymentEnabled(consensusParams, Consensus::DEPLOYMENT_SEGWIT)) {
if (commitpos == NO_WITNESS_COMMITMENT) {
uint256 witnessroot = BlockWitnessMerkleRoot(block, nullptr);
CHash256().Write(witnessroot).Write(ret).Finalize(witnessroot);
CTxOut out;
out.nValue = 0;
out.scriptPubKey.resize(MINIMUM_WITNESS_COMMITMENT);
out.scriptPubKey[0] = OP_RETURN;
out.scriptPubKey[1] = 0x24;
out.scriptPubKey[2] = 0xaa;
out.scriptPubKey[3] = 0x21;
out.scriptPubKey[4] = 0xa9;
out.scriptPubKey[5] = 0xed;
memcpy(&out.scriptPubKey[6], witnessroot.begin(), 32);
commitment = std::vector<unsigned char>(out.scriptPubKey.begin(), out.scriptPubKey.end());
CMutableTransaction tx(*block.vtx[0]);
tx.vout.push_back(out);
block.vtx[0] = MakeTransactionRef(std::move(tx));
}
if (commitpos == NO_WITNESS_COMMITMENT) {
uint256 witnessroot = BlockWitnessMerkleRoot(block, nullptr);
CHash256().Write(witnessroot).Write(ret).Finalize(witnessroot);
CTxOut out;
out.nValue = 0;
out.scriptPubKey.resize(MINIMUM_WITNESS_COMMITMENT);
out.scriptPubKey[0] = OP_RETURN;
out.scriptPubKey[1] = 0x24;
out.scriptPubKey[2] = 0xaa;
out.scriptPubKey[3] = 0x21;
out.scriptPubKey[4] = 0xa9;
out.scriptPubKey[5] = 0xed;
memcpy(&out.scriptPubKey[6], witnessroot.begin(), 32);
commitment = std::vector<unsigned char>(out.scriptPubKey.begin(), out.scriptPubKey.end());
CMutableTransaction tx(*block.vtx[0]);
tx.vout.push_back(out);
block.vtx[0] = MakeTransactionRef(std::move(tx));
}
UpdateUncommittedBlockStructures(block, pindexPrev, consensusParams);
return commitment;