From 140871623d521050eb84e5aed986387590cce2ca Mon Sep 17 00:00:00 2001
From: Ross Nicoll <jrn@jrn.me.uk>
Date: Sat, 5 Jun 2021 09:09:47 +0100
Subject: [PATCH] Introduce AuxPoW chain parameters

Introduce AuxPoW chain parameters. These are not yet used, splitting these out to make validation easier.
---
 src/chainparams.cpp    | 16 ++++++++++++++++
 src/consensus/params.h | 17 +++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index dd3e4a5a7..4a5546a5e 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -99,6 +99,10 @@ public:
         consensus.fSimplifiedRewards = false;
         consensus.fShortEarlyCoinbase = true;
 
+        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
+        consensus.fStrictChainId = true;
+        consensus.nLegacyBlocksBefore = 371337;
+
         /**
          * The message start string is designed to be unlikely to occur in normal data.
          * The characters are rarely used upper ASCII, not valid as UTF-8, and produce
@@ -216,6 +220,10 @@ public:
         consensus.fSimplifiedRewards = false;
         consensus.fShortEarlyCoinbase = true;
 
+        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
+        consensus.fStrictChainId = false;
+        consensus.nLegacyBlocksBefore = 158100;
+
         pchMessageStart[0] = 0xfc;
         pchMessageStart[1] = 0xc1;
         pchMessageStart[2] = 0xb7;
@@ -345,6 +353,10 @@ public:
         consensus.fSimplifiedRewards = true;
         consensus.fShortEarlyCoinbase = true;
 
+        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
+        consensus.fStrictChainId = true;
+        consensus.nLegacyBlocksBefore = 0;
+
         // message start is defined as the first 4 bytes of the sha256d of the block script
         CHashWriter h(SER_DISK, 0);
         h << consensus.signet_challenge;
@@ -417,6 +429,10 @@ public:
         consensus.fSimplifiedRewards = true;
         consensus.fShortEarlyCoinbase = false;
 
+        consensus.nAuxpowChainId = 0x0062; // 98 - Josh Wise!
+        consensus.fStrictChainId = true;
+        consensus.nLegacyBlocksBefore = 0;
+
         pchMessageStart[0] = 0xfa;
         pchMessageStart[1] = 0xbf;
         pchMessageStart[2] = 0xb5;
diff --git a/src/consensus/params.h b/src/consensus/params.h
index b7223b2fc..baf841e33 100644
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -95,6 +95,23 @@ struct Params {
 
     bool fSimplifiedRewards;
     bool fShortEarlyCoinbase;
+
+    /** Auxpow parameters */
+    int32_t nAuxpowChainId;
+    bool fStrictChainId;
+    int nLegacyBlocksBefore; // -1 for "always allow"
+
+    /**
+     * Check whether or not to allow legacy blocks at the given height.
+     * @param nHeight Height of the block to check.
+     * @return True if it is allowed to have a legacy version.
+     */
+    bool AllowLegacyBlocks(unsigned nHeight) const
+    {
+        if (nLegacyBlocksBefore < 0)
+            return true;
+        return static_cast<int> (nHeight) < nLegacyBlocksBefore;
+    }
 };
 } // namespace Consensus