Fee changes from ArticMine

https://github.com/ArticMine/Monero-Documents/blob/master/MoneroScaling2021-02.pdf

with a change to use 1.7 instead of 2.0 for the max long term increase rate

1 files changed, 62 insertions, 32 deletions

diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index a53a1b615..7b97a44d5 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -290,15 +290,15 @@ void do_prepare_file_names(const std::string& file_path, std::string& keys_file,
   mms_file = file_path + ".mms";
 }
 
-uint64_t calculate_fee(uint64_t fee_per_kb, size_t bytes, uint64_t fee_multiplier)
+uint64_t calculate_fee(uint64_t fee_per_kb, size_t bytes)
 {
   uint64_t kB = (bytes + 1023) / 1024;
-  return kB * fee_per_kb * fee_multiplier;
+  return kB * fee_per_kb;
 }
 
-uint64_t calculate_fee_from_weight(uint64_t base_fee, uint64_t weight, uint64_t fee_multiplier, uint64_t fee_quantization_mask)
+uint64_t calculate_fee_from_weight(uint64_t base_fee, uint64_t weight, uint64_t fee_quantization_mask)
 {
-  uint64_t fee = weight * base_fee * fee_multiplier;
+  uint64_t fee = weight * base_fee;
   fee = (fee + fee_quantization_mask - 1) / fee_quantization_mask * fee_quantization_mask;
   return fee;
 }
@@ -878,12 +878,12 @@ uint8_t get_clsag_fork()
   return HF_VERSION_CLSAG;
 }
 
-uint64_t calculate_fee(bool use_per_byte_fee, const cryptonote::transaction &tx, size_t blob_size, uint64_t base_fee, uint64_t fee_multiplier, uint64_t fee_quantization_mask)
+uint64_t calculate_fee(bool use_per_byte_fee, const cryptonote::transaction &tx, size_t blob_size, uint64_t base_fee, uint64_t fee_quantization_mask)
 {
   if (use_per_byte_fee)
-    return calculate_fee_from_weight(base_fee, cryptonote::get_transaction_weight(tx, blob_size), fee_multiplier, fee_quantization_mask);
+    return calculate_fee_from_weight(base_fee, cryptonote::get_transaction_weight(tx, blob_size), fee_quantization_mask);
   else
-    return calculate_fee(base_fee, blob_size, fee_multiplier);
+    return calculate_fee(base_fee, blob_size);
 }
 
 bool get_short_payment_id(crypto::hash8 &payment_id8, const tools::wallet2::pending_tx &ptx, hw::device &hwdev)
@@ -7232,17 +7232,17 @@ bool wallet2::sign_multisig_tx_from_file(const std::string &filename, std::vecto
   return sign_multisig_tx_to_file(exported_txs, filename, txids);
 }
 //----------------------------------------------------------------------------------------------------
-uint64_t wallet2::estimate_fee(bool use_per_byte_fee, bool use_rct, int n_inputs, int mixin, int n_outputs, size_t extra_size, bool bulletproof, bool clsag, bool bulletproof_plus, uint64_t base_fee, uint64_t fee_multiplier, uint64_t fee_quantization_mask) const
+uint64_t wallet2::estimate_fee(bool use_per_byte_fee, bool use_rct, int n_inputs, int mixin, int n_outputs, size_t extra_size, bool bulletproof, bool clsag, bool bulletproof_plus, uint64_t base_fee, uint64_t fee_quantization_mask) const
 {
   if (use_per_byte_fee)
   {
     const size_t estimated_tx_weight = estimate_tx_weight(use_rct, n_inputs, mixin, n_outputs, extra_size, bulletproof, clsag, bulletproof_plus);
-    return calculate_fee_from_weight(base_fee, estimated_tx_weight, fee_multiplier, fee_quantization_mask);
+    return calculate_fee_from_weight(base_fee, estimated_tx_weight, fee_quantization_mask);
   }
   else
   {
     const size_t estimated_tx_size = estimate_tx_size(use_rct, n_inputs, mixin, n_outputs, extra_size, bulletproof, clsag, bulletproof_plus);
-    return calculate_fee(base_fee, estimated_tx_size, fee_multiplier);
+    return calculate_fee(base_fee, estimated_tx_size);
   }
 }
 
@@ -7315,6 +7315,40 @@ uint64_t wallet2::get_base_fee()
   return get_dynamic_base_fee_estimate();
 }
 //----------------------------------------------------------------------------------------------------
+uint64_t wallet2::get_base_fee(uint32_t priority)
+{
+  const bool use_2021_scaling = use_fork_rules(HF_VERSION_2021_SCALING, -30 * 1);
+  if (use_2021_scaling)
+  {
+    // clamp and map to 0..3 indices, mapping 0 (default, but should not end up here) to 0, and 1..4 to 0..3
+    if (priority == 0)
+      priority = 1;
+    else if (priority > 4)
+      priority = 4;
+    --priority;
+
+    std::vector<uint64_t> fees;
+    boost::optional<std::string> result = m_node_rpc_proxy.get_dynamic_base_fee_estimate_2021_scaling(FEE_ESTIMATE_GRACE_BLOCKS, fees);
+    if (result)
+    {
+      MERROR("Failed to determine base fee, using default");
+      return FEE_PER_BYTE;
+    }
+    if (priority >= fees.size())
+    {
+      MERROR("Failed to determine base fee for priority " << priority << ", using default");
+      return FEE_PER_BYTE;
+    }
+    return fees[priority];
+  }
+  else
+  {
+    const uint64_t base_fee = get_base_fee();
+    const uint64_t fee_multiplier = get_fee_multiplier(priority);
+    return base_fee * fee_multiplier;
+  }
+}
+//----------------------------------------------------------------------------------------------------
 uint64_t wallet2::get_fee_quantization_mask()
 {
   if(m_light_wallet)
@@ -7389,9 +7423,8 @@ uint32_t wallet2::adjust_priority(uint32_t priority)
     {
       // check if there's a backlog in the tx pool
       const bool use_per_byte_fee = use_fork_rules(HF_VERSION_PER_BYTE_FEE, 0);
-      const uint64_t base_fee = get_base_fee();
-      const uint64_t fee_multiplier = get_fee_multiplier(1);
-      const double fee_level = fee_multiplier * base_fee * (use_per_byte_fee ? 1 : (12/(double)13 / (double)1024));
+      const uint64_t base_fee = get_base_fee(1);
+      const double fee_level = base_fee * (use_per_byte_fee ? 1 : (12/(double)13 / (double)1024));
       const std::vector<std::pair<uint64_t, uint64_t>> blocks = estimate_backlog({std::make_pair(fee_level, fee_level)});
       if (blocks.size() != 1)
       {
@@ -9665,8 +9698,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
     bulletproof_plus ? 4 : 3
   };
 
-  const uint64_t base_fee  = get_base_fee();
-  const uint64_t fee_multiplier = get_fee_multiplier(priority, get_fee_algorithm());
+  const uint64_t base_fee  = get_base_fee(priority);
   const uint64_t fee_quantization_mask = get_fee_quantization_mask();
 
   // throw if attempting a transaction with no destinations
@@ -9698,7 +9730,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
   // early out if we know we can't make it anyway
   // we could also check for being within FEE_PER_KB, but if the fee calculation
   // ever changes, this might be missed, so let this go through
-  const uint64_t min_fee = (fee_multiplier * base_fee * estimate_tx_size(use_rct, 1, fake_outs_count, 2, extra.size(), bulletproof, clsag, bulletproof_plus));
+  const uint64_t min_fee = (base_fee * estimate_tx_size(use_rct, 1, fake_outs_count, 2, extra.size(), bulletproof, clsag, bulletproof_plus));
   uint64_t balance_subtotal = 0;
   uint64_t unlocked_balance_subtotal = 0;
   for (uint32_t index_minor : subaddr_indices)
@@ -9720,7 +9752,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
   const size_t tx_weight_two_rings = estimate_tx_weight(use_rct, 2, fake_outs_count, 2, 0, bulletproof, clsag, bulletproof_plus);
   THROW_WALLET_EXCEPTION_IF(tx_weight_one_ring > tx_weight_two_rings, error::wallet_internal_error, "Estimated tx weight with 1 input is larger than with 2 inputs!");
   const size_t tx_weight_per_ring = tx_weight_two_rings - tx_weight_one_ring;
-  const uint64_t fractional_threshold = (fee_multiplier * base_fee * tx_weight_per_ring) / (use_per_byte_fee ? 1 : 1024);
+  const uint64_t fractional_threshold = (base_fee * tx_weight_per_ring) / (use_per_byte_fee ? 1 : 1024);
 
   // gather all dust and non-dust outputs belonging to specified subaddresses
   size_t num_nondust_outputs = 0;
@@ -9814,7 +9846,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
   {
     // this is used to build a tx that's 1 or 2 inputs, and 2 outputs, which
     // will get us a known fee.
-    uint64_t estimated_fee = estimate_fee(use_per_byte_fee, use_rct, 2, fake_outs_count, 2, extra.size(), bulletproof, clsag, bulletproof_plus, base_fee, fee_multiplier, fee_quantization_mask);
+    uint64_t estimated_fee = estimate_fee(use_per_byte_fee, use_rct, 2, fake_outs_count, 2, extra.size(), bulletproof, clsag, bulletproof_plus, base_fee, fee_quantization_mask);
     preferred_inputs = pick_preferred_rct_inputs(needed_money + estimated_fee, subaddr_account, subaddr_indices);
     if (!preferred_inputs.empty())
     {
@@ -9994,7 +10026,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
       pending_tx test_ptx;
 
       const size_t num_outputs = get_num_outputs(tx.dsts, m_transfers, tx.selected_transfers);
-      needed_fee = estimate_fee(use_per_byte_fee, use_rct ,tx.selected_transfers.size(), fake_outs_count, num_outputs, extra.size(), bulletproof, clsag, bulletproof_plus, base_fee, fee_multiplier, fee_quantization_mask);
+      needed_fee = estimate_fee(use_per_byte_fee, use_rct ,tx.selected_transfers.size(), fake_outs_count, num_outputs, extra.size(), bulletproof, clsag, bulletproof_plus, base_fee, fee_quantization_mask);
 
       auto try_carving_from_partial_payment = [&](uint64_t needed_fee, uint64_t available_for_fee)
       {
@@ -10048,7 +10080,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
         transfer_selected(tx.dsts, tx.selected_transfers, fake_outs_count, outs, unlock_time, needed_fee, extra,
           detail::digit_split_strategy, tx_dust_policy(::config::DEFAULT_DUST_THRESHOLD), test_tx, test_ptx);
       auto txBlob = t_serializable_object_to_blob(test_ptx.tx);
-      needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_multiplier, fee_quantization_mask);
+      needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_quantization_mask);
       available_for_fee = test_ptx.fee + test_ptx.change_dts.amount + (!test_ptx.dust_added_to_fee ? test_ptx.dust : 0);
       LOG_PRINT_L2("Made a " << get_weight_string(test_ptx.tx, txBlob.size()) << " tx, with " << print_money(available_for_fee) << " available for fee (" <<
         print_money(needed_fee) << " needed)");
@@ -10073,7 +10105,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
             transfer_selected(tx.dsts, tx.selected_transfers, fake_outs_count, outs, unlock_time, needed_fee, extra,
               detail::digit_split_strategy, tx_dust_policy(::config::DEFAULT_DUST_THRESHOLD), test_tx, test_ptx);
           txBlob = t_serializable_object_to_blob(test_ptx.tx);
-          needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_multiplier, fee_quantization_mask);
+          needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_quantization_mask);
           LOG_PRINT_L2("Made an attempt at a  final " << get_weight_string(test_ptx.tx, txBlob.size()) << " tx, with " << print_money(test_ptx.fee) <<
             " fee  and " << print_money(test_ptx.change_dts.amount) << " change");
         }
@@ -10256,13 +10288,12 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_all(uint64_t below
   const bool bulletproof = use_fork_rules(get_bulletproof_fork(), 0);
   const bool bulletproof_plus = use_fork_rules(get_bulletproof_plus_fork(), 0);
   const bool clsag = use_fork_rules(get_clsag_fork(), 0);
-  const uint64_t base_fee  = get_base_fee();
-  const uint64_t fee_multiplier = get_fee_multiplier(priority, get_fee_algorithm());
+  const uint64_t base_fee  = get_base_fee(priority);
   const size_t tx_weight_one_ring = estimate_tx_weight(use_rct, 1, fake_outs_count, 2, 0, bulletproof, clsag, bulletproof_plus);
   const size_t tx_weight_two_rings = estimate_tx_weight(use_rct, 2, fake_outs_count, 2, 0, bulletproof, clsag, bulletproof_plus);
   THROW_WALLET_EXCEPTION_IF(tx_weight_one_ring > tx_weight_two_rings, error::wallet_internal_error, "Estimated tx weight with 1 input is larger than with 2 inputs!");
   const size_t tx_weight_per_ring = tx_weight_two_rings - tx_weight_one_ring;
-  const uint64_t fractional_threshold = (fee_multiplier * base_fee * tx_weight_per_ring) / (use_per_byte_fee ? 1 : 1024);
+  const uint64_t fractional_threshold = (base_fee * tx_weight_per_ring) / (use_per_byte_fee ? 1 : 1024);
 
   THROW_WALLET_EXCEPTION_IF(unlocked_balance(subaddr_account, false) == 0, error::wallet_internal_error, "No unlocked balance in the specified account");
 
@@ -10371,8 +10402,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
     rct::RangeProofPaddedBulletproof,
     bulletproof_plus ? 4 : 3
   };
-  const uint64_t base_fee  = get_base_fee();
-  const uint64_t fee_multiplier = get_fee_multiplier(priority, get_fee_algorithm());
+  const uint64_t base_fee  = get_base_fee(priority);
   const uint64_t fee_quantization_mask = get_fee_quantization_mask();
 
   LOG_PRINT_L2("Starting with " << unused_transfers_indices.size() << " non-dust outputs and " << unused_dust_indices.size() << " dust outputs");
@@ -10399,11 +10429,11 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
     if (use_fork_rules(HF_VERSION_PER_BYTE_FEE))
     {
       const uint64_t estimated_tx_weight_with_one_extra_output = estimate_tx_weight(use_rct, tx.selected_transfers.size() + 1, fake_outs_count, tx.dsts.size()+1, extra.size(), bulletproof, clsag, bulletproof_plus);
-      fee_dust_threshold = calculate_fee_from_weight(base_fee, estimated_tx_weight_with_one_extra_output, fee_multiplier, fee_quantization_mask);
+      fee_dust_threshold = calculate_fee_from_weight(base_fee, estimated_tx_weight_with_one_extra_output, fee_quantization_mask);
     }
     else
     {
-      fee_dust_threshold = base_fee * fee_multiplier * (upper_transaction_weight_limit + 1023) / 1024;
+      fee_dust_threshold = base_fee * (upper_transaction_weight_limit + 1023) / 1024;
     }
 
     size_t idx =
@@ -10437,7 +10467,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
       pending_tx test_ptx;
 
       const size_t num_outputs = get_num_outputs(tx.dsts, m_transfers, tx.selected_transfers);
-      needed_fee = estimate_fee(use_per_byte_fee, use_rct, tx.selected_transfers.size(), fake_outs_count, num_outputs, extra.size(), bulletproof, clsag, bulletproof_plus, base_fee, fee_multiplier, fee_quantization_mask);
+      needed_fee = estimate_fee(use_per_byte_fee, use_rct, tx.selected_transfers.size(), fake_outs_count, num_outputs, extra.size(), bulletproof, clsag, bulletproof_plus, base_fee, fee_quantization_mask);
 
       // add N - 1 outputs for correct initial fee estimation
       for (size_t i = 0; i < ((outputs > 1) ? outputs - 1 : outputs); ++i)
@@ -10452,7 +10482,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
         transfer_selected(tx.dsts, tx.selected_transfers, fake_outs_count, outs, unlock_time, needed_fee, extra,
           detail::digit_split_strategy, tx_dust_policy(::config::DEFAULT_DUST_THRESHOLD), test_tx, test_ptx);
       auto txBlob = t_serializable_object_to_blob(test_ptx.tx);
-      needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_multiplier, fee_quantization_mask);
+      needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_quantization_mask);
       available_for_fee = test_ptx.fee + test_ptx.change_dts.amount;
       for (auto &dt: test_ptx.dests)
         available_for_fee += dt.amount;
@@ -10489,7 +10519,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
           transfer_selected(tx.dsts, tx.selected_transfers, fake_outs_count, outs, unlock_time, needed_fee, extra,
             detail::digit_split_strategy, tx_dust_policy(::config::DEFAULT_DUST_THRESHOLD), test_tx, test_ptx);
         txBlob = t_serializable_object_to_blob(test_ptx.tx);
-        needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_multiplier, fee_quantization_mask);
+        needed_fee = calculate_fee(use_per_byte_fee, test_ptx.tx, txBlob.size(), base_fee, fee_quantization_mask);
         LOG_PRINT_L2("Made an attempt at a final " << get_weight_string(test_ptx.tx, txBlob.size()) << " tx, with " << print_money(test_ptx.fee) <<
           " fee  and " << print_money(test_ptx.change_dts.amount) << " change");
       } while (needed_fee > test_ptx.fee);
@@ -10816,7 +10846,7 @@ std::vector<wallet2::pending_tx> wallet2::create_unmixable_sweep_transactions()
   const bool hf1_rules = use_fork_rules(2, 10); // first hard fork has version 2
   tx_dust_policy dust_policy(hf1_rules ? 0 : ::config::DEFAULT_DUST_THRESHOLD);
 
-  const uint64_t base_fee  = get_base_fee();
+  const uint64_t base_fee  = get_base_fee(1);
 
   // may throw
   std::vector<size_t> unmixable_outputs = select_available_unmixable_outputs();