add get_sender intrinsic

libraries/eosiolib/capi/eosio/system.h

@@ -85,6 +85,14 @@ uint64_t  current_time();
 __attribute__((eosio_wasm_import))
 bool is_feature_activated( const capi_checksum256* feature_digest );
 
+/**
+ * Return name of account that sent current inline action
+ *
+ * @return name of account that sent the current inline action (empty name if not called from inline action)
+ */
+__attribute__((eosio_wasm_import))
+capi_name get_sender();
+
 #ifdef __cplusplus
 }
 #endif

libraries/eosiolib/contracts/eosio/system.hpp

@@ -6,6 +6,7 @@
 #include "../../core/eosio/time.hpp"
 #include "../../core/eosio/check.hpp"
 #include "../../core/eosio/fixed_bytes.hpp"
+#include "../../core/eosio/name.hpp"
 
 namespace eosio {
   namespace internal_use_do_not_use {
@@ -19,6 +20,9 @@ namespace eosio {
 
       __attribute__((eosio_wasm_import))
       bool is_feature_activated( const capi_checksum256* feature_digest );
+
+      __attribute__((eosio_wasm_import))
+      uint64_t get_sender();
     }
   }
 
@@ -76,4 +80,14 @@ namespace eosio {
          reinterpret_cast<const internal_use_do_not_use::capi_checksum256*>( feature_digest_data.data() )
       );
    }
+
+   /**
+    * Return name of account that sent current inline action
+    *
+    * @ingroup system
+    * @return name of account that sent the current inline action (empty name if not called from inline action)
+    */
+   inline name get_sender() {
+      return name( internal_use_do_not_use::get_sender() );
+   }
 }

libraries/native/intrinsics.cpp

@@ -340,6 +340,9 @@ extern "C" {
    int get_context_free_data( uint32_t index, char* buff, size_t size ) {
       return intrinsics::get().call<intrinsics::get_context_free_data>(index, buff, size);
    }
+   capi_name get_sender() {
+      return intrinsics::get().call<intrinsics::get_sender>();
+   }
 
    // softfloat
    static constexpr uint32_t inv_float_eps = 0x4B000000;

libraries/native/native/eosio/intrinsics_def.hpp

@@ -156,7 +156,8 @@ intrinsic_macro(send_inline) \
 intrinsic_macro(send_context_free_inline) \
 intrinsic_macro(send_deferred) \
 intrinsic_macro(cancel_deferred) \
-intrinsic_macro(get_context_free_data)
+intrinsic_macro(get_context_free_data) \
+intrinsic_macro(get_sender) 
 
 #define CREATE_ENUM(name) \
    name,