Add new fee structure with all sub-fields denominated in BTC

doc/release-notes.md

@@ -70,6 +70,10 @@ RPC changes
   /rest/block/ endpoints when in json mode. This is also included in `getblock`
   (with verbosity=2), `listsinceblock`, `listtransactions`, and
   `getrawtransaction` RPC commands.
+- New `fees` field introduced in `getrawmempool`, `getmempoolancestors`, `getmempooldescendants` and
+   `getmempoolentry` when verbosity is set to `true` with sub-fields `ancestor`, `base`, `modified`
+   and `descendent` denominated in BTC. This new field deprecates previous fee fields, such as
+   `fee`, `modifiedfee`, `ancestorfee` and `descendentfee`.
 
 External wallet files
 ---------------------

src/rpc/blockchain.cpp

@@ -360,17 +360,23 @@ UniValue getdifficulty(const JSONRPCRequest& request)
 std::string EntryDescriptionString()
 {
     return "    \"size\" : n,             (numeric) virtual transaction size as defined in BIP 141. This is different from actual serialized size for witness transactions as witness data is discounted.\n"
-           "    \"fee\" : n,              (numeric) transaction fee in " + CURRENCY_UNIT + "\n"
+           "    \"fee\" : n,              (numeric) transaction fee in " + CURRENCY_UNIT + " (DEPRECATED)\n"
-           "    \"modifiedfee\" : n,      (numeric) transaction fee with fee deltas used for mining priority\n"
+           "    \"modifiedfee\" : n,      (numeric) transaction fee with fee deltas used for mining priority (DEPRECATED)\n"
            "    \"time\" : n,             (numeric) local time transaction entered pool in seconds since 1 Jan 1970 GMT\n"
            "    \"height\" : n,           (numeric) block height when transaction entered pool\n"
            "    \"descendantcount\" : n,  (numeric) number of in-mempool descendant transactions (including this one)\n"
            "    \"descendantsize\" : n,   (numeric) virtual transaction size of in-mempool descendants (including this one)\n"
-           "    \"descendantfees\" : n,   (numeric) modified fees (see above) of in-mempool descendants (including this one)\n"
+           "    \"descendantfees\" : n,   (numeric) modified fees (see above) of in-mempool descendants (including this one) (DEPRECATED)\n"
            "    \"ancestorcount\" : n,    (numeric) number of in-mempool ancestor transactions (including this one)\n"
            "    \"ancestorsize\" : n,     (numeric) virtual transaction size of in-mempool ancestors (including this one)\n"
-           "    \"ancestorfees\" : n,     (numeric) modified fees (see above) of in-mempool ancestors (including this one)\n"
+           "    \"ancestorfees\" : n,     (numeric) modified fees (see above) of in-mempool ancestors (including this one) (DEPRECATED)\n"
            "    \"wtxid\" : hash,         (string) hash of serialized transaction, including witness data\n"
+           "    \"fees\" : {\n"
+           "        \"base\" : n,         (numeric) transaction fee in " + CURRENCY_UNIT + "\n"
+           "        \"modified\" : n,     (numeric) transaction fee with fee deltas used for mining priority in " + CURRENCY_UNIT + "\n"
+           "        \"ancestor\" : n,     (numeric) modified fees (see above) of in-mempool ancestors (including this one) in " + CURRENCY_UNIT + "\n"
+           "        \"descendent\" : n,   (numeric) number of in-mempool ancestor transactions (including this one) in " + CURRENCY_UNIT + "\n"
+           "    }\n"
            "    \"depends\" : [           (array) unconfirmed transactions used as inputs for this transaction\n"
            "        \"transactionid\",    (string) parent transaction id\n"
            "       ... ]\n"
@@ -383,6 +389,13 @@ void entryToJSON(UniValue &info, const CTxMemPoolEntry &e)
 {
     AssertLockHeld(mempool.cs);
 
+    UniValue fees(UniValue::VOBJ);
+    fees.pushKV("base", ValueFromAmount(e.GetFee()));
+    fees.pushKV("modified", ValueFromAmount(e.GetModifiedFee()));
+    fees.pushKV("ancestor", ValueFromAmount(e.GetModFeesWithAncestors()));
+    fees.pushKV("descendant", ValueFromAmount(e.GetModFeesWithDescendants()));
+    info.pushKV("fees", fees);
+
     info.pushKV("size", (int)e.GetTxSize());
     info.pushKV("fee", ValueFromAmount(e.GetFee()));
     info.pushKV("modifiedfee", ValueFromAmount(e.GetModifiedFee()));

test/functional/mempool_packages.py

@@ -70,7 +70,10 @@ class MempoolPackagesTest(BitcoinTestFramework):
             assert_equal(mempool[x]['descendantcount'], descendant_count)
             descendant_fees += mempool[x]['fee']
             assert_equal(mempool[x]['modifiedfee'], mempool[x]['fee'])
+            assert_equal(mempool[x]['fees']['base'], mempool[x]['fee'])
+            assert_equal(mempool[x]['fees']['modified'], mempool[x]['modifiedfee'])
             assert_equal(mempool[x]['descendantfees'], descendant_fees * COIN)
+            assert_equal(mempool[x]['fees']['descendant'], descendant_fees)
             descendant_size += mempool[x]['size']
             assert_equal(mempool[x]['descendantsize'], descendant_size)
             descendant_count += 1
@@ -132,6 +135,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
         ancestor_fees = 0
         for x in chain:
             ancestor_fees += mempool[x]['fee']
+            assert_equal(mempool[x]['fees']['ancestor'], ancestor_fees + Decimal('0.00001'))
             assert_equal(mempool[x]['ancestorfees'], ancestor_fees * COIN + 1000)
 
         # Undo the prioritisetransaction for later tests
@@ -145,6 +149,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
         descendant_fees = 0
         for x in reversed(chain):
             descendant_fees += mempool[x]['fee']
+            assert_equal(mempool[x]['fees']['descendant'], descendant_fees + Decimal('0.00001'))
             assert_equal(mempool[x]['descendantfees'], descendant_fees * COIN + 1000)
 
         # Adding one more transaction on to the chain should fail.
@@ -170,7 +175,9 @@ class MempoolPackagesTest(BitcoinTestFramework):
             descendant_fees += mempool[x]['fee']
             if (x == chain[-1]):
                 assert_equal(mempool[x]['modifiedfee'], mempool[x]['fee']+satoshi_round(0.00002))
+                assert_equal(mempool[x]['fees']['modified'], mempool[x]['fee']+satoshi_round(0.00002))
             assert_equal(mempool[x]['descendantfees'], descendant_fees * COIN + 2000)
+            assert_equal(mempool[x]['fees']['descendant'], descendant_fees+satoshi_round(0.00002))
 
         # TODO: check that node1's mempool is as expected