Next HF activation code.

Summary: Fixed Nov, 13 so we are ready for whatever comes with 1x/2x .

Test Plan:
  make check

Reviewers: freetrader, dagurval, sickpig, #bitcoin_abc, schancel

Reviewed By: #bitcoin_abc, schancel

Subscribers: schancel

Differential Revision: https://reviews.bitcoinabc.org/D612

src/chainparams.cpp

@@ -143,6 +143,9 @@ class CMainParams : public CChainParams {
         // Aug, 1 hard fork
         consensus.uahfHeight = 478559;
 
+        // Nov, 13 hard fork
+        consensus.cashHardForkActivationTime = 1510600000;
+
         /**
          * The message start string is designed to be unlikely to occur in
          * normal data. The characters are rarely used upper ASCII, not valid as
@@ -312,6 +315,9 @@ class CTestNetParams : public CChainParams {
         // Aug, 1 hard fork
         consensus.uahfHeight = 1155876;
 
+        // Nov, 13 hard fork
+        consensus.cashHardForkActivationTime = 1510600000;
+
         pchMessageStart[0] = 0x0b;
         pchMessageStart[1] = 0x11;
         pchMessageStart[2] = 0x09;
@@ -431,6 +437,9 @@ class CRegTestParams : public CChainParams {
         // Hard fork is always enabled on regtest.
         consensus.uahfHeight = 0;
 
+        // Nov, 13 hard fork
+        consensus.cashHardForkActivationTime = 0;
+
         pchMessageStart[0] = 0xfa;
         pchMessageStart[1] = 0xbf;
         pchMessageStart[2] = 0xb5;

src/consensus/params.h

@@ -73,6 +73,9 @@ struct Params {
     }
     uint256 nMinimumChainWork;
     uint256 defaultAssumeValid;
+
+    /** Activation time at which the cash HF kicks in. */
+    int64_t cashHardForkActivationTime;
 };
 } // namespace Consensus
 

src/validation.cpp

@@ -617,6 +617,19 @@ bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev) {
     return IsUAHFenabled(config, pindexPrev->nHeight);
 }
 
+static bool IsCashHFEnabled(const Config &config, int64_t nMedianTimePast) {
+    return nMedianTimePast >=
+           config.GetChainParams().GetConsensus().cashHardForkActivationTime;
+}
+
+bool IsCashHFEnabled(const Config &config, const CBlockIndex *pindexPrev) {
+    if (pindexPrev == nullptr) {
+        return false;
+    }
+
+    return IsCashHFEnabled(config, pindexPrev->GetMedianTimePast());
+}
+
 // Used to avoid mempool polluting consensus critical paths if CCoinsViewMempool
 // were somehow broken and returning the wrong scriptPubKeys
 static bool CheckInputsFromMempoolAndCache(const CTransaction &tx,

src/validation.h

@@ -374,6 +374,9 @@ void PruneBlockFilesManual(int nPruneUpToHeight);
 /** Check is UAHF has activated. */
 bool IsUAHFenabled(const Config &config, const CBlockIndex *pindexPrev);
 
+/** Check is Cash HF has activated. */
+bool IsCashHFEnabled(const Config &config, const CBlockIndex *pindexPrev);
+
 /** (try to) add transaction to memory pool
  * plTxnReplaced will be appended to with all transactions replaced from mempool
  * **/