Use CAmount for fee delta and modified fee

Cherry-pick of fa84a49
bitcoin/bitcoin#24625 (2/2)

Author: MarcoFalke

src/node/miner.h

@@ -46,7 +46,7 @@ struct CTxMemPoolModifiedEntry {
         nSigOpCostWithAncestors = entry->GetSigOpCostWithAncestors();
     }
 
-    int64_t GetModifiedFee() const { return iter->GetModifiedFee(); }
+    CAmount GetModifiedFee() const { return iter->GetModifiedFee(); }
     uint64_t GetSizeWithAncestors() const { return nSizeWithAncestors; }
     uint64_t GetDiscountSizeWithAncestors() const { return discountSizeWithAncestors; }
     CAmount GetModFeesWithAncestors() const { return nModFeesWithAncestors; }

src/txmempool.cpp

@@ -98,7 +98,7 @@ CTxMemPoolEntry::CTxMemPoolEntry(const CTransactionRef& tx, CAmount fee,
       discountSizeWithAncestors{GetDiscountTxSize()},
       setPeginsSpent(_setPeginsSpent) {}
 
-void CTxMemPoolEntry::UpdateFeeDelta(int64_t newFeeDelta)
+void CTxMemPoolEntry::UpdateFeeDelta(CAmount newFeeDelta)
 {
     nModFeesWithDescendants += newFeeDelta - feeDelta;
     nModFeesWithAncestors += newFeeDelta - feeDelta;

src/txmempool.h

@@ -102,7 +102,7 @@ class CTxMemPoolEntry
     const unsigned int entryHeight; //!< Chain height when entering the mempool
     const bool spendsCoinbase;      //!< keep track of transactions that spend a coinbase
     const int64_t sigOpCost;        //!< Total sigop cost
-    int64_t feeDelta{0};            //!< Used for determining the priority of the transaction for mining in a block
+    CAmount feeDelta{0};            //!< Used for determining the priority of the transaction for mining in a block
     LockPoints lockPoints;     //!< Track the height and time at which tx was final
 
     // Information about descendants of this transaction that are in the
@@ -135,7 +135,7 @@ class CTxMemPoolEntry
     std::chrono::seconds GetTime() const { return std::chrono::seconds{nTime}; }
     unsigned int GetHeight() const { return entryHeight; }
     int64_t GetSigOpCost() const { return sigOpCost; }
-    int64_t GetModifiedFee() const { return nFee + feeDelta; }
+    CAmount GetModifiedFee() const { return nFee + feeDelta; }
     size_t DynamicMemoryUsage() const { return nUsageSize; }
     const LockPoints& GetLockPoints() const { return lockPoints; }
 
@@ -144,8 +144,8 @@ class CTxMemPoolEntry
     // Adjusts the ancestor state
     void UpdateAncestorState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount, int64_t modifySigOps, int64_t discountSize);
     // Updates the fee delta used for mining priority score, and the
-    // modified fees with descendants.
-    void UpdateFeeDelta(int64_t feeDelta);
+    // modified fees with descendants/ancestors.
+    void UpdateFeeDelta(CAmount newFeeDelta);
     // Update the LockPoints after a reorg
     void UpdateLockPoints(const LockPoints& lp);