From 18850d359bbc4d3333d9f1ac33607242d205c2ce Mon Sep 17 00:00:00 2001
From: Ross Nicoll <jrn@jrn.me.uk>
Date: Sun, 7 Jan 2018 22:56:53 +0000
Subject: Add Dogecoin current fee calculation logic (#1413)

Introduces 1 COIN/kb fees, rounded up to the next 1 COIN.
---
 src/wallet/wallet.cpp | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

(limited to 'src/wallet/wallet.cpp')

diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 0e09dc70d..b34cbae3a 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -8,6 +8,7 @@
 #include "base58.h"
 #include "checkpoints.h"
 #include "chain.h"
+#include "dogecoin.h"
 #include "wallet/coincontrol.h"
 #include "consensus/consensus.h"
 #include "consensus/validation.h"
@@ -2636,7 +2637,7 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
                         break;
                 }
 
-                CAmount nFeeNeeded = GetMinimumFee(nBytes, currentConfirmationTarget, mempool);
+                CAmount nFeeNeeded = GetMinimumFee(txNew, nBytes, currentConfirmationTarget, mempool);
                 if (coinControl && nFeeNeeded > 0 && coinControl->nMinimumTotalFee > nFeeNeeded) {
                     nFeeNeeded = coinControl->nMinimumTotalFee;
                 }
@@ -2805,18 +2806,30 @@ bool CWallet::AddAccountingEntry(const CAccountingEntry& acentry, CWalletDB *pwa
     return true;
 }
 
+CAmount CWallet::GetRequiredFee(const CMutableTransaction& tx, unsigned int nTxBytes)
+{
+    // Dogecoin: Round TX bytes up to the next 1,000 bytes
+    nTxBytes += 1000 - (nTxBytes % 1000);
+
+    // Dogecoin: Add an increased fee for each dust output
+    return std::max(minTxFee.GetFee(nTxBytes) + GetDogecoinDustFee(tx.vout, minTxFee), ::minRelayTxFee.GetFee(nTxBytes));
+}
+
 CAmount CWallet::GetRequiredFee(unsigned int nTxBytes)
 {
+    // Dogecoin: Round TX bytes up to the next 1,000 bytes
+    nTxBytes += 1000 - (nTxBytes % 1000);
+
     return std::max(minTxFee.GetFee(nTxBytes), ::minRelayTxFee.GetFee(nTxBytes));
 }
 
-CAmount CWallet::GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarget, const CTxMemPool& pool)
+CAmount CWallet::GetMinimumFee(const CMutableTransaction& tx, unsigned int nTxBytes, unsigned int nConfirmTarget, const CTxMemPool& pool)
 {
     // payTxFee is the user-set global for desired feerate
-    return GetMinimumFee(nTxBytes, nConfirmTarget, pool, payTxFee.GetFee(nTxBytes));
+    return GetMinimumFee(tx, nTxBytes, nConfirmTarget, pool, payTxFee.GetFee(nTxBytes));
 }
 
-CAmount CWallet::GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarget, const CTxMemPool& pool, CAmount targetFee)
+CAmount CWallet::GetMinimumFee(const CMutableTransaction& tx, unsigned int nTxBytes, unsigned int nConfirmTarget, const CTxMemPool& pool, CAmount targetFee)
 {
     CAmount nFeeNeeded = targetFee;
     // User didn't set: use -txconfirmtarget to estimate...
@@ -2828,7 +2841,7 @@ CAmount CWallet::GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarge
             nFeeNeeded = fallbackFee.GetFee(nTxBytes);
     }
     // prevent user from paying a fee below minRelayTxFee or minTxFee
-    nFeeNeeded = std::max(nFeeNeeded, GetRequiredFee(nTxBytes));
+    nFeeNeeded = std::max(nFeeNeeded, GetRequiredFee(tx, nTxBytes));
     // But always obey the maximum
     if (nFeeNeeded > maxTxFee)
         nFeeNeeded = maxTxFee;
@@ -2836,8 +2849,6 @@ CAmount CWallet::GetMinimumFee(unsigned int nTxBytes, unsigned int nConfirmTarge
 }
 
 
-
-
 DBErrors CWallet::LoadWallet(bool& fFirstRunRet)
 {
     if (!fFileBacked)
-- 
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