Remove getTransactionsUpdated() from mining interface

It's unnecessary to expose it via this interface.

Author: Sjors

src/interfaces/mining.h

@@ -102,10 +102,6 @@ class Mining
      */
     virtual bool processNewBlock(const std::shared_ptr<const CBlock>& block, bool* new_block) = 0;
 
-    //! Return the number of transaction updates in the mempool,
-    //! used to decide whether to make a new block template.
-    virtual unsigned int getTransactionsUpdated() = 0;
-
     //! Get internal node context. Useful for RPC and testing,
     //! but not accessible across processes.
     virtual node::NodeContext* context() { return nullptr; }

src/ipc/capnp/mining.capnp

@@ -19,7 +19,6 @@ interface Mining $Proxy.wrap("interfaces::Mining") {
     waitTipChanged @3 (context :Proxy.Context, currentTip: Data, timeout: Float64) -> (result: Common.BlockRef);
     createNewBlock @4 (options: BlockCreateOptions) -> (result: BlockTemplate);
     processNewBlock @5 (context :Proxy.Context, block: Data) -> (newBlock: Bool, result: Bool);
-    getTransactionsUpdated @6 (context :Proxy.Context) -> (result: UInt32);
 }
 
 interface BlockTemplate $Proxy.wrap("interfaces::BlockTemplate") {

src/node/interfaces.cpp

@@ -984,11 +984,6 @@ class MinerImpl : public Mining
         return chainman().ProcessNewBlock(block, /*force_processing=*/true, /*min_pow_checked=*/true, /*new_block=*/new_block);
     }
 
-    unsigned int getTransactionsUpdated() override
-    {
-        return context()->mempool->GetTransactionsUpdated();
-    }
-
     std::unique_ptr<BlockTemplate> createNewBlock(const BlockCreateOptions& options) override
     {
         BlockAssembler::Options assemble_options{options};

src/rpc/mining.cpp

@@ -743,6 +743,7 @@ static RPCHelpMan getblocktemplate()
     }
 
     static unsigned int nTransactionsUpdatedLast;
+    const CTxMemPool& mempool = EnsureMemPool(node);
 
     if (!lpval.isNull())
     {
@@ -773,7 +774,7 @@ static RPCHelpMan getblocktemplate()
                 tip = miner.waitTipChanged(hashWatchedChain, checktxtime).hash;
                 // Timeout: Check transactions for update
                 // without holding the mempool lock to avoid deadlocks
-                if (miner.getTransactionsUpdated() != nTransactionsUpdatedLastLP)
+                if (mempool.GetTransactionsUpdated() != nTransactionsUpdatedLastLP)
                     break;
                 checktxtime = std::chrono::seconds(10);
             }
@@ -804,13 +805,13 @@ static RPCHelpMan getblocktemplate()
     static int64_t time_start;
     static std::unique_ptr<BlockTemplate> block_template;
     if (!pindexPrev || pindexPrev->GetBlockHash() != tip ||
-        (miner.getTransactionsUpdated() != nTransactionsUpdatedLast && GetTime() - time_start > 5))
+        (mempool.GetTransactionsUpdated() != nTransactionsUpdatedLast && GetTime() - time_start > 5))
     {
         // Clear pindexPrev so future calls make a new block, despite any failures from here on
         pindexPrev = nullptr;
 
         // Store the pindexBest used before createNewBlock, to avoid races
-        nTransactionsUpdatedLast = miner.getTransactionsUpdated();
+        nTransactionsUpdatedLast = mempool.GetTransactionsUpdated();
         CBlockIndex* pindexPrevNew = chainman.m_blockman.LookupBlockIndex(tip);
         time_start = GetTime();