From 12f2612bfa3dd8ce357d750a2c5d49b519223dc29a1d09da2421f3bab82635a8 Mon Sep 17 00:00:00 2001
From: Minimons <morten.g.hermansen@gmail.com>
Date: Tue, 30 Jun 2026 19:09:42 +0200
Subject: [PATCH] 22: Broken

---
 .../AnchorIdlJupiterPerpsPositionDecoder.tjava     | 14 ++++++++++++--
 .../com/r35157/nenjim/hubd/impl/ref/Main.tjava     | 12 ++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava b/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava
index 288e5e2..bdca852 100644
--- a/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava
+++ b/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava
@@ -8,6 +8,7 @@ import com.r35157.libs.solana.SolanaAccountInfo;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.math.RoundingMode;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.util.Base64;
@@ -57,7 +58,15 @@ public class AnchorIdlJupiterPerpsPositionDecoder {
                 .valueOf(rawSizeUsd)
                 .movePointLeft(6);
 
-        BigInteger cumulativeInterestSnapshot = decodeCumulativeInterestSnapshot(accountInfo);
+        AnchorIdlJupiterPerpsCustodyDecoder custodyDecoder = new AnchorIdlJupiterPerpsCustodyDecoder();
+        BigInteger currentCumulativeInterestRate = custodyDecoder.decodeCurrentCumulativeInterestRate(collateralCustodyAccountInfo);
+        BigInteger cumulativeInterestSnapshot = decodeCumulativeInterestSnapshot(positionAccountInfo);
+        BigInteger difference = currentCumulativeInterestRate.subtract(cumulativeInterestSnapshot);
+
+        ΩUSDCAmountΩ borrowFeeUsd =
+                new BigDecimal(difference)
+                        .multiply(sizeUsd)
+                        .divide(BigDecimal.valueOf(1_000_000_000L), 6, RoundingMode.CEILING);
 
         JupiterPerpsPosition pos = new JupiterPerpsPosition(
                 positionAccount,
@@ -65,7 +74,8 @@ public class AnchorIdlJupiterPerpsPositionDecoder {
                 direction,
                 tradedTokenMint,
                 sizeUsd,
-                collateralUsd
+                collateralUsd,
+                borrowFeeUsd
         );
 
         return pos;
diff --git a/src/main/tjava/com/r35157/nenjim/hubd/impl/ref/Main.tjava b/src/main/tjava/com/r35157/nenjim/hubd/impl/ref/Main.tjava
index 61be688..04d6647 100644
--- a/src/main/tjava/com/r35157/nenjim/hubd/impl/ref/Main.tjava
+++ b/src/main/tjava/com/r35157/nenjim/hubd/impl/ref/Main.tjava
@@ -14,10 +14,14 @@ import java.lang.management.ClassLoadingMXBean;
 import java.lang.management.ManagementFactory;
 import com.r35157.libs.jupiter.perps.impl.anchoridl.AnchorIdlJupiterPerpsCustodyDecoder;
 import com.r35157.libs.solana.SolanaAccountInfo;
+
+import java.math.BigDecimal;
 import java.math.BigInteger;
 import com.r35157.nenjim.hubd.ctx.ContextManager;
 import com.r35157.nenjim.hubd.journal.JournalManager;
 import com.r35157.nenjim.hubd.impl.ref.JournalManagerImpl;
+
+import java.math.RoundingMode;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Set;
@@ -49,6 +53,14 @@ public class Main {
             System.out.println("currentCumulativeInterestRate: " + currentCumulativeInterestRate);
             System.out.println("cumulativeInterestSnapshot: " + cumulativeInterestSnapshot);
             System.out.println("difference: " + difference);
+
+            BigDecimal borrowFeeUsdCandidate =
+                    new BigDecimal(difference)
+                            .multiply(position.sizeUsd())
+                            .divide(BigDecimal.valueOf(1_000_000_000L), 6, RoundingMode.CEILING);
+
+            System.out.println("borrowFeeUsdCandidate: " + borrowFeeUsdCandidate);
+
             System.out.println();
         }