diff --git a/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsCustodyDecoder.tjava b/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsCustodyDecoder.tjava
index 04fcda1..0e65ba0 100644
--- a/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsCustodyDecoder.tjava
+++ b/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsCustodyDecoder.tjava
@@ -4,6 +4,7 @@ import com.r35157.libs.codec.Base58Codec;
 import com.r35157.libs.codec.impl.ref.Base58CodecImpl;
 import com.r35157.libs.solana.SolanaAccountInfo;
 
+import java.math.BigInteger;
 import java.util.Base64;
 
 class AnchorIdlJupiterPerpsCustodyDecoder {
@@ -22,6 +23,10 @@ class AnchorIdlJupiterPerpsCustodyDecoder {
         return readPublicKey(data, MINT_OFFSET);
     }
 
+    BigInteger decodeCurrentCumulativeInterestRate(SolanaAccountInfo custodyAccountInfo) {
+        return null;
+    }
+
     private ΩSPLMintAddressΩ readPublicKey(
             byte[] data,
             int offset