diff --git a/hook/error.h b/hook/error.h
index 63e0c03bb..0ad05774f 100644
--- a/hook/error.h
+++ b/hook/error.h
@@ -47,5 +47,7 @@
 #define MEM_OVERLAP -43
 #define TOO_MANY_STATE_MODIFICATIONS -44
 #define TOO_MANY_NAMESPACES -45
+#define EXPORT_FAILURE -46
+#define TOO_MANY_EXPORTED_TXN -47
 #define HOOK_ERROR_CODES
 #endif //HOOK_ERROR_CODES
diff --git a/hook/extern.h b/hook/extern.h
index ee34af6ff..728d4839d 100644
--- a/hook/extern.h
+++ b/hook/extern.h
@@ -329,5 +329,15 @@ meta_slot(uint32_t slot_no);
 extern int64_t
 xpop_slot(uint32_t slot_no_tx, uint32_t slot_no_meta);
 
+extern int64_t
+xport(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t read_ptr,
+    uint32_t read_len);
+
+extern int64_t
+xport_reserve(uint32_t count);
+
 #define HOOK_EXTERN
 #endif  // HOOK_EXTERN
diff --git a/hook/sfcodes.h b/hook/sfcodes.h
index 8c7bc48f4..460bd8447 100644
--- a/hook/sfcodes.h
+++ b/hook/sfcodes.h
@@ -16,6 +16,7 @@
 #define sfHookExecutionIndex ((1U << 16U) + 19U)
 #define sfHookApiVersion ((1U << 16U) + 20U)
 #define sfHookStateScale ((1U << 16U) + 21U)
+#define sfHookExportCount ((1U << 16U) + 22U)
 #define sfNetworkID ((2U << 16U) + 1U)
 #define sfFlags ((2U << 16U) + 2U)
 #define sfSourceTag ((2U << 16U) + 3U)
@@ -228,6 +229,7 @@
 #define sfHookEmission ((14U << 16U) + 93U)
 #define sfMintURIToken ((14U << 16U) + 92U)
 #define sfAmountEntry ((14U << 16U) + 91U)
+#define sfExportedTxn ((14U << 16U) + 90U)
 #define sfSigners ((15U << 16U) + 3U)
 #define sfSignerEntries ((15U << 16U) + 4U)
 #define sfTemplate ((15U << 16U) + 5U)
diff --git a/hook/tts.h b/hook/tts.h
index bd03b0399..6d628504a 100644
--- a/hook/tts.h
+++ b/hook/tts.h
@@ -34,6 +34,7 @@
 #define ttURITOKEN_BUY 47
 #define ttURITOKEN_CREATE_SELL_OFFER 48
 #define ttURITOKEN_CANCEL_SELL_OFFER 49
+#define ttEXPORT 90
 #define ttCRON 92
 #define ttCRON_SET 93
 #define ttREMARKS_SET 94