From 8eed7939c72781a812fdf3fb8c36d4e3a428d268 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Amaury=20S=C3=A9chet?= <deadalnix@gmail.com>
Date: Wed, 18 Oct 2017 01:50:38 +0200
Subject: [PATCH] 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    |  9 +++++++++
 src/consensus/params.h |  3 +++
 src/validation.cpp     | 13 +++++++++++++
 src/validation.h       |  3 +++
 4 files changed, 28 insertions(+)

diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 6b363f868c..e5cf0335cb 100644
--- a/src/chainparams.cpp
+++ b/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;
diff --git a/src/consensus/params.h b/src/consensus/params.h
index ae36f4f49c..0b5ac95f13 100644
--- a/src/consensus/params.h
+++ b/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
 
diff --git a/src/validation.cpp b/src/validation.cpp
index f939623b15..f82a679cf1 100644
--- a/src/validation.cpp
+++ b/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,
diff --git a/src/validation.h b/src/validation.h
index f4ec192443..13c1e183ab 100644
--- a/src/validation.h
+++ b/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
  * **/