validation: Disable PermittedDifficultyTransition check

src/consensus/params.h

@@ -99,6 +99,7 @@ struct Params {
      * This prevents us from warning about the CSV and segwit activations. */
     int MinBIP9WarningHeight;
 
+    bool m_particl_mode = true;
     /** Time at which OP_ISCOINSTAKE becomes active */
     int64_t OpIsCoinstakeTime;
     bool fAllowOpIsCoinstakeWithP2PKH;

src/headerssync.cpp

@@ -21,7 +21,7 @@ constexpr size_t REDOWNLOAD_BUFFER_SIZE{14441}; // 14441/606 = ~23.8 commitments
 
 // Our memory analysis assumes 48 bytes for a CompressedHeader (so we should
 // re-calculate parameters if we compress further)
-static_assert(sizeof(CompressedHeader) == 48);
+static_assert(sizeof(CompressedHeader) == 48 + 32);
 
 HeadersSyncState::HeadersSyncState(NodeId id, const Consensus::Params& consensus_params,
         const CBlockIndex* chain_start, const arith_uint256& minimum_required_work) :

src/headerssync.h

@@ -22,19 +22,22 @@ struct CompressedHeader {
     // header
     int32_t nVersion{0};
     uint256 hashMerkleRoot;
+    uint256 hashWitnessMerkleRoot;
     uint32_t nTime{0};
     uint32_t nBits{0};
     uint32_t nNonce{0};
 
     CompressedHeader()
     {
         hashMerkleRoot.SetNull();
+        hashWitnessMerkleRoot.SetNull();
     }
 
     CompressedHeader(const CBlockHeader& header)
     {
         nVersion = header.nVersion;
         hashMerkleRoot = header.hashMerkleRoot;
+        hashWitnessMerkleRoot = header.hashWitnessMerkleRoot;
         nTime = header.nTime;
         nBits = header.nBits;
         nNonce = header.nNonce;
@@ -45,6 +48,7 @@ struct CompressedHeader {
         ret.nVersion = nVersion;
         ret.hashPrevBlock = hash_prev_block;
         ret.hashMerkleRoot = hashMerkleRoot;
+        ret.hashWitnessMerkleRoot = hashWitnessMerkleRoot;
         ret.nTime = nTime;
         ret.nBits = nBits;
         ret.nNonce = nNonce;

src/kernel/chainparams.cpp

@@ -427,6 +427,7 @@ static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits
 
 void CChainParams::SetOld()
 {
+    consensus.m_particl_mode = false;
     if (GetChainType() == ChainType::MAIN) {
         consensus.script_flag_exceptions.clear();
         consensus.script_flag_exceptions.emplace( // BIP16 exception

src/pow.cpp

@@ -76,6 +76,7 @@ unsigned int CalculateNextWorkRequired(const CBlockIndex* pindexLast, int64_t nF
 bool PermittedDifficultyTransition(const Consensus::Params& params, int64_t height, uint32_t old_nbits, uint32_t new_nbits)
 {
     if (params.fPowAllowMinDifficultyBlocks) return true;
+    if (params.m_particl_mode) return true;
 
     if (height % params.DifficultyAdjustmentInterval() == 0) {
         int64_t smallest_timespan = params.nPowTargetTimespan/4;