Remove use of AcceptToMemoryPool in wallet code

This commit does not change behavior.

src/interfaces/chain.cpp

@@ -11,6 +11,7 @@
 #include <policy/policy.h>
 #include <policy/rbf.h>
 #include <primitives/block.h>
+#include <primitives/transaction.h>
 #include <protocol.h>
 #include <sync.h>
 #include <threadsafety.h>
@@ -146,6 +147,12 @@ class LockImpl : public Chain::Lock
         LockAnnotation lock(::cs_main);
         return CheckFinalTx(tx);
     }
+    bool submitToMemoryPool(CTransactionRef tx, CAmount absurd_fee, CValidationState& state) override
+    {
+        LockAnnotation lock(::cs_main);
+        return AcceptToMemoryPool(::mempool, state, tx, nullptr /* missing inputs */, nullptr /* txn replaced */,
+            false /* bypass limits */, absurd_fee);
+    }
 };
 
 class LockingStateImpl : public LockImpl, public UniqueLock<CCriticalSection>
@@ -237,6 +244,7 @@ public:
     {
         return ::mempool.GetMinFee(gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000);
     }
+    CAmount maxTxFee() override { return ::maxTxFee; }
     bool getPruneMode() override { return ::fPruneMode; }
     bool p2pEnabled() override { return g_connman != nullptr; }
     int64_t getAdjustedTime() override { return GetAdjustedTime(); }

src/interfaces/chain.h

@@ -7,6 +7,7 @@
 
 #include <optional.h>               // For Optional and nullopt
 #include <policy/rbf.h>             // For RBFTransactionState
+#include <primitives/transaction.h> // For CTransactionRef
 
 #include <memory>
 #include <stddef.h>
@@ -16,7 +17,7 @@
 
 class CBlock;
 class CScheduler;
-class CTransaction;
+class CValidationState;
 class uint256;
 struct CBlockLocator;
 struct FeeCalculation;
@@ -109,6 +110,10 @@ public:
 
         //! Check if transaction will be final given chain height current time.
         virtual bool checkFinalTx(const CTransaction& tx) = 0;
+
+        //! Add transaction to memory pool if the transaction fee is below the
+        //! amount specified by absurd_fee (as a safeguard). */
+        virtual bool submitToMemoryPool(CTransactionRef tx, CAmount absurd_fee, CValidationState& state) = 0;
     };
 
     //! Return Lock interface. Chain is locked when this is called, and
@@ -159,6 +164,12 @@ public:
     //! Pool min fee.
     virtual CFeeRate mempoolMinFee() = 0;
 
+    //! Get node max tx fee setting (-maxtxfee).
+    //! This could be replaced by a per-wallet max fee, as proposed at
+    //! https://github.com/bitcoin/bitcoin/issues/15355
+    //! But for the time being, wallets call this to access the node setting.
+    virtual CAmount maxTxFee() = 0;
+
     //! Check if pruning is enabled.
     virtual bool getPruneMode() = 0;
 

src/wallet/wallet.cpp

@@ -1886,7 +1886,7 @@ void CWallet::ReacceptWalletTransactions()
     for (const std::pair<const int64_t, CWalletTx*>& item : mapSorted) {
         CWalletTx& wtx = *(item.second);
         CValidationState state;
-        wtx.AcceptToMemoryPool(*locked_chain, maxTxFee, state);
+        wtx.AcceptToMemoryPool(*locked_chain, state);
     }
 }
 
@@ -1897,7 +1897,7 @@ bool CWalletTx::RelayWalletTransaction(interfaces::Chain::Lock& locked_chain)
     {
         CValidationState state;
         /* GetDepthInMainChain already catches known conflicts. */
-        if (InMempool() || AcceptToMemoryPool(locked_chain, maxTxFee, state)) {
+        if (InMempool() || AcceptToMemoryPool(locked_chain, state)) {
             pwallet->WalletLogPrintf("Relaying wtx %s\n", GetHash().ToString());
             if (pwallet->chain().p2pEnabled()) {
                 pwallet->chain().relayTransaction(GetHash());
@@ -3180,7 +3180,7 @@ bool CWallet::CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::ve
         if (fBroadcastTransactions)
         {
             // Broadcast
-            if (!wtx.AcceptToMemoryPool(*locked_chain, maxTxFee, state)) {
+            if (!wtx.AcceptToMemoryPool(*locked_chain, state)) {
                 WalletLogPrintf("CommitTransaction(): Transaction cannot be broadcast immediately, %s\n", FormatStateMessage(state));
                 // TODO: if we expect the failure to be long term or permanent, instead delete wtx from the wallet and return failure.
             } else {
@@ -4474,17 +4474,14 @@ bool CMerkleTx::IsImmatureCoinBase(interfaces::Chain::Lock& locked_chain) const
     return GetBlocksToMaturity(locked_chain) > 0;
 }
 
-bool CWalletTx::AcceptToMemoryPool(interfaces::Chain::Lock& locked_chain, const CAmount& nAbsurdFee, CValidationState& state)
+bool CWalletTx::AcceptToMemoryPool(interfaces::Chain::Lock& locked_chain, CValidationState& state)
 {
-    LockAnnotation lock(::cs_main); // Temporary, for AcceptToMemoryPool below. Removed in upcoming commit.
-
     // We must set fInMempool here - while it will be re-set to true by the
     // entered-mempool callback, if we did not there would be a race where a
     // user could call sendmoney in a loop and hit spurious out of funds errors
     // because we think that this newly generated transaction's change is
     // unavailable as we're not yet aware that it is in the mempool.
-    bool ret = ::AcceptToMemoryPool(mempool, state, tx, nullptr /* pfMissingInputs */,
-                                nullptr /* plTxnReplaced */, false /* bypass_limits */, nAbsurdFee);
+    bool ret = locked_chain.submitToMemoryPool(tx, pwallet->chain().maxTxFee(), state);
     fInMempool |= ret;
     return ret;
 }

src/wallet/wallet.h

@@ -538,7 +538,7 @@ public:
     bool RelayWalletTransaction(interfaces::Chain::Lock& locked_chain);
 
     /** Pass this transaction to the mempool. Fails if absolute fee exceeds absurd fee. */
-    bool AcceptToMemoryPool(interfaces::Chain::Lock& locked_chain, const CAmount& nAbsurdFee, CValidationState& state);
+    bool AcceptToMemoryPool(interfaces::Chain::Lock& locked_chain, CValidationState& state);
 
     // TODO: Remove "NO_THREAD_SAFETY_ANALYSIS" and replace it with the correct
     // annotation "EXCLUSIVE_LOCKS_REQUIRED(pwallet->cs_wallet)". The annotation