diff --git a/Stellar-contract.x b/Stellar-contract.x
index 0e67dc3..6850d99 100644
--- a/Stellar-contract.x
+++ b/Stellar-contract.x
@@ -70,7 +70,12 @@ enum SCValType
     // symbolic SCVals used as the key for ledger entries for a contract's
     // instance and an address' nonce, respectively.
     SCV_LEDGER_KEY_CONTRACT_INSTANCE = 20,
+#ifdef XDR_SPARSE_MAP
+    SCV_LEDGER_KEY_NONCE = 21,
+    SCV_SPARSE_MAP = 22
+#else
     SCV_LEDGER_KEY_NONCE = 21
+#endif
 };
 
 enum SCErrorType
@@ -285,6 +290,11 @@ case SCV_LEDGER_KEY_CONTRACT_INSTANCE:
     void;
 case SCV_LEDGER_KEY_NONCE:
     SCNonceKey nonce_key;
+
+#ifdef XDR_SPARSE_MAP
+case SCV_SPARSE_MAP:
+    SCMap *sparseMap;
+#endif
 };
 
 struct SCMapEntry
diff --git a/Stellar-ledger-entries.x b/Stellar-ledger-entries.x
index b9a9a16..cc97e84 100644
--- a/Stellar-ledger-entries.x
+++ b/Stellar-ledger-entries.x
@@ -581,6 +581,10 @@ struct LedgerEntry
         void;
     case 1:
         LedgerEntryExtensionV1 v1;
+#ifdef XDR_LEDGER_ENTRY_EXT_V2
+    case 2:
+        ExtensionPoint v2;
+#endif
     }
     ext;
 };
diff --git a/Stellar-ledger.x b/Stellar-ledger.x
index a17036b..94baad3 100644
--- a/Stellar-ledger.x
+++ b/Stellar-ledger.x
@@ -522,7 +522,26 @@ struct TransactionMetaV4
 };
 
 
-// This is in Stellar-ledger.x to due to a circular dependency 
+#ifdef XDR_TRANSACTION_META_V5
+struct TransactionMetaV5
+{
+    ExtensionPoint ext;
+
+    LedgerEntryChanges txChangesBefore;  // tx level changes before operations
+                                         // are applied if any
+    OperationMetaV2 operations<>;        // meta for each operation
+    LedgerEntryChanges txChangesAfter;   // tx level changes after operations are
+                                         // applied if any
+    SorobanTransactionMetaV2* sorobanMeta; // Soroban-specific meta (only for
+                                           // Soroban transactions).
+
+    TransactionEvent events<>; // Used for transaction-level events (like fee payment)
+    DiagnosticEvent diagnosticEvents<>; // Used for all diagnostic information
+    uint32 txIndex; // Index of the transaction in the ledger
+};
+#endif
+
+// This is in Stellar-ledger.x to due to a circular dependency
 struct InvokeHostFunctionSuccessPreImage
 {
     SCVal returnValue;
@@ -543,6 +562,10 @@ case 3:
     TransactionMetaV3 v3;
 case 4:
     TransactionMetaV4 v4;
+#ifdef XDR_TRANSACTION_META_V5
+case 5:
+    TransactionMetaV5 v5;
+#endif
 };
 
 // This struct groups together changes on a per transaction basis
diff --git a/Stellar-transaction.x b/Stellar-transaction.x
index 9a14d6e..da396fe 100644
--- a/Stellar-transaction.x
+++ b/Stellar-transaction.x
@@ -64,7 +64,12 @@ enum OperationType
     LIQUIDITY_POOL_WITHDRAW = 23,
     INVOKE_HOST_FUNCTION = 24,
     EXTEND_FOOTPRINT_TTL = 25,
+#ifdef XDR_HELLO_WORLD
+    RESTORE_FOOTPRINT = 26,
+    HELLO_WORLD = 27
+#else
     RESTORE_FOOTPRINT = 26
+#endif
 };
 
 /* CreateAccount
@@ -695,6 +700,10 @@ struct Operation
         ExtendFootprintTTLOp extendFootprintTTLOp;
     case RESTORE_FOOTPRINT:
         RestoreFootprintOp restoreFootprintOp;
+#ifdef XDR_HELLO_WORLD
+    case HELLO_WORLD:
+        HelloWorldOp helloWorldOp;
+#endif
     }
     body;
 };
@@ -1892,6 +1901,27 @@ case RESTORE_FOOTPRINT_INSUFFICIENT_REFUNDABLE_FEE:
     void;
 };
 
+#ifdef XDR_HELLO_WORLD
+struct HelloWorldOp
+{
+    AccountID helloTo;
+};
+
+enum HelloWorldResultCode
+{
+    HELLO_WORLD_SUCCESS = 0,
+    HELLO_WORLD_MALFORMED = -1
+};
+
+union HelloWorldResult switch (HelloWorldResultCode code)
+{
+case HELLO_WORLD_SUCCESS:
+    void;
+case HELLO_WORLD_MALFORMED:
+    void;
+};
+#endif
+
 /* High level Operation Result */
 enum OperationResultCode
 {
@@ -1964,6 +1994,10 @@ case opINNER:
         ExtendFootprintTTLResult extendFootprintTTLResult;
     case RESTORE_FOOTPRINT:
         RestoreFootprintResult restoreFootprintResult;
+#ifdef XDR_HELLO_WORLD
+    case HELLO_WORLD:
+        HelloWorldResult helloWorldResult;
+#endif
     }
     tr;
 case opBAD_AUTH: