1 files changed, 10 insertions, 0 deletions
diff --git a/src/interfaces/chain.h b/src/interfaces/chain.h
index 2e0328eb25..d0f74cb100 100644
--- a/src/interfaces/chain.h
+++ b/src/interfaces/chain.h
@@ -19,6 +19,7 @@ class CScheduler;
 class CTransaction;
 class uint256;
 struct CBlockLocator;
+struct FeeCalculation;
 
 namespace interfaces {
 
@@ -145,6 +146,15 @@ public:
 
     //! Check chain limits.
     virtual bool checkChainLimits(CTransactionRef tx) = 0;
+
+    //! Estimate smart fee.
+    virtual CFeeRate estimateSmartFee(int num_blocks, bool conservative, FeeCalculation* calc = nullptr) = 0;
+
+    //! Fee estimator max target.
+    virtual unsigned int estimateMaxBlocks() = 0;
+
+    //! Pool min fee.
+    virtual CFeeRate mempoolMinFee() = 0;
 };
 
 //! Interface to let node manage chain clients (wallets, or maybe tools for