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Merge #16713: Ignore old versionbit activations to avoid 'unknown softforks' warning

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fdb3e8f8b2 Ignore old versionbit activations (Anthony Towns)

Pull request description:

  PR 16060 removed the CSV and Segwit BIP9 softfork definitions and hard-coded ('buried') the activation heights. The versionbits code will warn users if an undefined softfork has been signalled in block header versions, and removing the CSV/Segwit definitions caused those warnings to be triggered.

  Change the BIP 9 warning code to only check for unknown softforks after the segwit activation height.

ACKs for top commit:
  MarcoFalke:
    ACK fdb3e8f8b2
  ajtowns:
    ACK fdb3e8f8b2 for what it's worth
  achow101:
    ACK fdb3e8f8b2
  Sjors:
    ACK fdb3e8f8b2. It makes the bit 0 warning go away in mainnet and testnet QT when a new block arrives. I think the code is clear enough.
  jonatack:
    ACK fdb3e8f8b2

Tree-SHA512: e6fd34e8902f8c7affb28e8951803e47d542710d5f1229000746656a37ee59d754439fc33e36b7eef87544262e5aac374645db91b74cb507e73514003ca7a67f
This commit is contained in:
MarcoFalke
2019-09-27 15:25:47 -04:00
parent a6c8aed1f1 fdb3e8f8b2
commit 6b2210f101
3 changed files with 8 additions and 1 deletions
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3
src/validation.cpp
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@@ -1821,7 +1821,8 @@ public:
bool Condition(const CBlockIndex* pindex, const Consensus::Params& params) const override
{
return ((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) &&
return pindex->nHeight >= params.MinBIP9WarningHeight &&
((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) &&
((pindex->nVersion >> bit) & 1) != 0 &&
((ComputeBlockVersion(pindex->pprev, params) >> bit) & 1) == 0;
}