1 files changed, 12 insertions, 1 deletions
diff --git a/src/interfaces/chain.h b/src/interfaces/chain.h
index b1e3f59452..be486bd4fc 100644
--- a/src/interfaces/chain.h
+++ b/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;