1.1.0

2024-03-15 18:16:03 +01:00
commit 0a6901a7f0
1865 changed files with 515440 additions and 0 deletions
--- a/src/wallet/fees.cpp
+++ b/src/wallet/fees.cpp
@@ -0,0 +1,92 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2009-2019 The Palladium Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <wallet/fees.h>
+
+#include <wallet/coincontrol.h>
+#include <wallet/wallet.h>
+
+
+CAmount GetRequiredFee(const CWallet& wallet, unsigned int nTxBytes)
+{
+    return GetRequiredFeeRate(wallet).GetFee(nTxBytes);
+}
+
+
+CAmount GetMinimumFee(const CWallet& wallet, unsigned int nTxBytes, const CCoinControl& coin_control, FeeCalculation* feeCalc)
+{
+    return GetMinimumFeeRate(wallet, coin_control, feeCalc).GetFee(nTxBytes);
+}
+
+CFeeRate GetRequiredFeeRate(const CWallet& wallet)
+{
+    return std::max(wallet.m_min_fee, wallet.chain().relayMinFee());
+}
+
+CFeeRate GetMinimumFeeRate(const CWallet& wallet, const CCoinControl& coin_control, FeeCalculation* feeCalc)
+{
+    /* User control of how to calculate fee uses the following parameter precedence:
+       1. coin_control.m_feerate
+       2. coin_control.m_confirm_target
+       3. m_pay_tx_fee (user-set member variable of wallet)
+       4. m_confirm_target (user-set member variable of wallet)
+       The first parameter that is set is used.
+    */
+    CFeeRate feerate_needed;
+    if (coin_control.m_feerate) { // 1.
+        feerate_needed = *(coin_control.m_feerate);
+        if (feeCalc) feeCalc->reason = FeeReason::PAYTXFEE;
+        // Allow to override automatic min/max check over coin control instance
+        if (coin_control.fOverrideFeeRate) return feerate_needed;
+    }
+    else if (!coin_control.m_confirm_target && wallet.m_pay_tx_fee != CFeeRate(0)) { // 3. TODO: remove magic value of 0 for wallet member m_pay_tx_fee
+        feerate_needed = wallet.m_pay_tx_fee;
+        if (feeCalc) feeCalc->reason = FeeReason::PAYTXFEE;
+    }
+    else { // 2. or 4.
+        // We will use smart fee estimation
+        unsigned int target = coin_control.m_confirm_target ? *coin_control.m_confirm_target : wallet.m_confirm_target;
+        // By default estimates are economical iff we are signaling opt-in-RBF
+        bool conservative_estimate = !coin_control.m_signal_bip125_rbf.get_value_or(wallet.m_signal_rbf);
+        // Allow to override the default fee estimate mode over the CoinControl instance
+        if (coin_control.m_fee_mode == FeeEstimateMode::CONSERVATIVE) conservative_estimate = true;
+        else if (coin_control.m_fee_mode == FeeEstimateMode::ECONOMICAL) conservative_estimate = false;
+
+        feerate_needed = wallet.chain().estimateSmartFee(target, conservative_estimate, feeCalc);
+        if (feerate_needed == CFeeRate(0)) {
+            // if we don't have enough data for estimateSmartFee, then use fallback fee
+            feerate_needed = wallet.m_fallback_fee;
+            if (feeCalc) feeCalc->reason = FeeReason::FALLBACK;
+
+            // directly return if fallback fee is disabled (feerate 0 == disabled)
+            if (wallet.m_fallback_fee == CFeeRate(0)) return feerate_needed;
+        }
+        // Obey mempool min fee when using smart fee estimation
+        CFeeRate min_mempool_feerate = wallet.chain().mempoolMinFee();
+        if (feerate_needed < min_mempool_feerate) {
+            feerate_needed = min_mempool_feerate;
+            if (feeCalc) feeCalc->reason = FeeReason::MEMPOOL_MIN;
+        }
+    }
+
+    // prevent user from paying a fee below the required fee rate
+    CFeeRate required_feerate = GetRequiredFeeRate(wallet);
+    if (required_feerate > feerate_needed) {
+        feerate_needed = required_feerate;
+        if (feeCalc) feeCalc->reason = FeeReason::REQUIRED;
+    }
+    return feerate_needed;
+}
+
+CFeeRate GetDiscardRate(const CWallet& wallet)
+{
+    unsigned int highest_target = wallet.chain().estimateMaxBlocks();
+    CFeeRate discard_rate = wallet.chain().estimateSmartFee(highest_target, false /* conservative */);
+    // Don't let discard_rate be greater than longest possible fee estimate if we get a valid fee estimate
+    discard_rate = (discard_rate == CFeeRate(0)) ? wallet.m_discard_rate : std::min(discard_rate, wallet.m_discard_rate);
+    // Discard rate must be at least dustRelayFee
+    discard_rate = std::max(discard_rate, wallet.chain().relayDustFee());
+    return discard_rate;
+}