Merge pull request #6351

65ef372 Add BIP65 to getblockchaininfo softforks list (Peter Todd)
cde7ab2 Add RPC tests for the CHECKLOCKTIMEVERIFY (BIP65) soft-fork (Peter Todd)
287f54f Add CHECKLOCKTIMEVERIFY (BIP65) soft-fork logic (Peter Todd)

1 files changed, 13 insertions, 1 deletions

diff --git a/src/main.cpp b/src/main.cpp
index d870280e99..2bcb553098 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1751,11 +1751,18 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
 
     unsigned int flags = fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE;
 
-    // Start enforcing the DERSIG (BIP66) rules, for block.nVersion=3 blocks, when 75% of the network has upgraded:
+    // Start enforcing the DERSIG (BIP66) rules, for block.nVersion=3 blocks,
+    // when 75% of the network has upgraded:
     if (block.nVersion >= 3 && IsSuperMajority(3, pindex->pprev, chainparams.GetConsensus().nMajorityEnforceBlockUpgrade, chainparams.GetConsensus())) {
         flags |= SCRIPT_VERIFY_DERSIG;
     }
 
+    // Start enforcing CHECKLOCKTIMEVERIFY, (BIP65) for block.nVersion=4
+    // blocks, when 75% of the network has upgraded:
+    if (block.nVersion >= 4 && IsSuperMajority(4, pindex->pprev, chainparams.GetConsensus().nMajorityEnforceBlockUpgrade, chainparams.GetConsensus())) {
+        flags |= SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY;
+    }
+
     CBlockUndo blockundo;
 
     CCheckQueueControl<CScriptCheck> control(fScriptChecks && nScriptCheckThreads ? &scriptcheckqueue : NULL);
@@ -2702,6 +2709,11 @@ bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& sta
         return state.Invalid(error("%s : rejected nVersion=2 block", __func__),
                              REJECT_OBSOLETE, "bad-version");
 
+    // Reject block.nVersion=3 blocks when 95% (75% on testnet) of the network has upgraded:
+    if (block.nVersion < 4 && IsSuperMajority(4, pindexPrev, consensusParams.nMajorityRejectBlockOutdated, consensusParams))
+        return state.Invalid(error("%s : rejected nVersion=3 block", __func__),
+                             REJECT_OBSOLETE, "bad-version");
+
     return true;
 }