13: Inject dependencies and fetch info for given position account

src/main/tjava/com/r35157/libs/jupiter/perps/JupiterPerpsPositionService.tjava

@@ -1,5 +1,8 @@
 package com.r35157.libs.jupiter.perps;
 
+import java.io.IOException;
+
 public interface JupiterPerpsPositionService {
-    JupiterPerpsPosition getPosition(ΩJupiterPerpsPositionAccountΩ positionAccount);
+    JupiterPerpsPosition getPosition(ΩJupiterPerpsPositionAccountΩ positionAccount)
+            throws IOException, InterruptedException;
 }

src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionServiceImpl.tjava

@@ -2,11 +2,36 @@ package com.r35157.libs.jupiter.perps.impl.anchoridl;
 
 import com.r35157.libs.jupiter.perps.JupiterPerpsPosition;
 import com.r35157.libs.jupiter.perps.JupiterPerpsPositionService;
+import com.r35157.libs.solana.SolanaAccountInfo;
+import com.r35157.libs.solana.SolanaBlockChain;
+
+import java.io.IOException;
 
 public class AnchorIdlJupiterPerpsPositionServiceImpl implements JupiterPerpsPositionService {
 
-    @Override
-    public JupiterPerpsPosition getPosition(ΩJupiterPerpsPositionAccountΩ positionAccount) {
-        throw new UnsupportedOperationException("Reading Jupiter Perps positions is not implemented yet.");
+    private final SolanaBlockChain solanaBlockChain;
+
+    public AnchorIdlJupiterPerpsPositionServiceImpl(
+            SolanaBlockChain solanaBlockChain
+    ) {
+        this.solanaBlockChain = solanaBlockChain;
     }
-}
+
+    @Override
+    public JupiterPerpsPosition getPosition(
+            ΩJupiterPerpsPositionAccountΩ positionAccount
+    ) throws IOException, InterruptedException {
+        SolanaAccountInfo accountInfo =
+                solanaBlockChain.getAccountInfo(positionAccount);
+
+        if (accountInfo == null) {
+            throw new IllegalArgumentException(
+                    "Jupiter Perps position account does not exist: " + positionAccount
+            );
+        }
+
+        throw new UnsupportedOperationException(
+                "Jupiter Perps position account decoding is not implemented yet."
+        );
+    }
+}