diff --git a/src/eth_plugin_handler.c b/src/eth_plugin_handler.c
index 17683f3..f7611bb 100644
--- a/src/eth_plugin_handler.c
+++ b/src/eth_plugin_handler.c
@@ -1,6 +1,7 @@
 #include <string.h>
 #include "eth_plugin_handler.h"
 #include "eth_plugin_internal.h"
+#include "plugin_utils.h"
 #include "shared_context.h"
 #include "network.h"
 
diff --git a/src/eth_plugin_interface.h b/src/eth_plugin_interface.h
index 6e7b435..28fd9b5 100644
--- a/src/eth_plugin_interface.h
+++ b/src/eth_plugin_interface.h
@@ -6,6 +6,7 @@
 #include "os.h"
 #include "cx.h"
 #include "tokens.h"
+#include "tx_content.h"
 
 /*************************************************************************************************
  * Comments provided in this file are quick reminders on the usage of the plugin interface       *
diff --git a/src/eth_plugin_internal.c b/src/eth_plugin_internal.c
index 74b25c6..ddf61bb 100644
--- a/src/eth_plugin_internal.c
+++ b/src/eth_plugin_internal.c
@@ -1,38 +1,11 @@
 #include <string.h>
 #include "eth_plugin_internal.h"
+#include "plugin_utils.h"
 
 bool erc20_plugin_available_check(void);
 
 void erc20_plugin_call(int message, void* parameters);
 
-void copy_address(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size) {
-    uint8_t copy_size = MIN(dst_size, ADDRESS_LENGTH);
-    memmove(dst, parameter + PARAMETER_LENGTH - copy_size, copy_size);
-}
-
-void copy_parameter(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size) {
-    uint8_t copy_size = MIN(dst_size, PARAMETER_LENGTH);
-    memmove(dst, parameter, copy_size);
-}
-
-bool U2BE_from_parameter(const uint8_t* parameter, uint16_t* value) {
-    if (allzeroes(parameter, PARAMETER_LENGTH - sizeof(uint16_t))) {
-        *value = U2BE(parameter, PARAMETER_LENGTH - sizeof(uint16_t));
-        return true;
-    }
-
-    return false;
-}
-
-bool U4BE_from_parameter(const uint8_t* parameter, uint32_t* value) {
-    if (allzeroes(parameter, PARAMETER_LENGTH - sizeof(uint32_t))) {
-        *value = U4BE(parameter, PARAMETER_LENGTH - sizeof(uint32_t));
-        return true;
-    }
-
-    return false;
-}
-
 #ifdef HAVE_STARKWARE
 void starkware_plugin_call(int message, void* parameters);
 #endif
diff --git a/src/eth_plugin_internal.h b/src/eth_plugin_internal.h
index f7031ec..6cc09ce 100644
--- a/src/eth_plugin_internal.h
+++ b/src/eth_plugin_internal.h
@@ -1,25 +1,13 @@
-#ifndef _ETH_PLUGIN_INTERNAL_H_
-#define _ETH_PLUGIN_INTERNAL_H_
+#pragma once
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "shared_context.h"
 #include "eth_plugin_interface.h"
 
-#define SELECTOR_SIZE    4
-#define PARAMETER_LENGTH 32
-
-void copy_address(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size);
-
-void copy_parameter(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size);
-
 void erc721_plugin_call(int message, void* parameters);
 void erc1155_plugin_call(int message, void* parameters);
 
-// Get the value from the beginning of the parameter (right to left) and check if the rest of it is
-// zero
-bool U2BE_from_parameter(const uint8_t* parameter, uint16_t* value);
-bool U4BE_from_parameter(const uint8_t* parameter, uint32_t* value);
-
 typedef bool (*PluginAvailableCheck)(void);
 typedef void (*PluginCall)(int, void*);
 
@@ -49,5 +37,3 @@ extern const uint8_t* const STARKWARE_SELECTORS[NUM_STARKWARE_SELECTORS];
 #endif
 
 extern internalEthPlugin_t const INTERNAL_ETH_PLUGINS[];
-
-#endif  // _ETH_PLUGIN_INTERNAL_H_
diff --git a/src/plugin_utils.c b/src/plugin_utils.c
new file mode 100644
index 0000000..0731c6f
--- /dev/null
+++ b/src/plugin_utils.c
@@ -0,0 +1,42 @@
+#include <string.h>
+
+#include "utils.h"
+#include "plugin_utils.h"
+
+void copy_address(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size) {
+    uint8_t copy_size = MIN(dst_size, ADDRESS_LENGTH);
+    memmove(dst, parameter + PARAMETER_LENGTH - copy_size, copy_size);
+}
+
+void copy_parameter(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size) {
+    uint8_t copy_size = MIN(dst_size, PARAMETER_LENGTH);
+    memmove(dst, parameter, copy_size);
+}
+
+bool U2BE_from_parameter(const uint8_t* parameter, uint16_t* value) {
+    if (allzeroes(parameter, PARAMETER_LENGTH - sizeof(uint16_t))) {
+        *value = U2BE(parameter, PARAMETER_LENGTH - sizeof(uint16_t));
+        return true;
+    }
+
+    return false;
+}
+
+bool U4BE_from_parameter(const uint8_t* parameter, uint32_t* value) {
+    if (allzeroes(parameter, PARAMETER_LENGTH - sizeof(uint32_t))) {
+        *value = U4BE(parameter, PARAMETER_LENGTH - sizeof(uint32_t));
+        return true;
+    }
+
+    return false;
+}
+
+bool find_selector(uint32_t selector, const uint32_t* array, size_t size, size_t* idx) {
+    for (size_t i = 0; i < size; ++i) {
+        if (selector == array[i]) {
+            if (idx != NULL) *idx = i;
+            return true;
+        }
+    }
+    return false;
+}
diff --git a/src/plugin_utils.h b/src/plugin_utils.h
new file mode 100644
index 0000000..569c202
--- /dev/null
+++ b/src/plugin_utils.h
@@ -0,0 +1,35 @@
+/*****************************************************************************
+ *   Ledger
+ *   (c) 2023 Ledger SAS
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *****************************************************************************/
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define SELECTOR_SIZE    4
+#define PARAMETER_LENGTH 32
+
+void copy_address(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size);
+
+void copy_parameter(uint8_t* dst, const uint8_t* parameter, uint8_t dst_size);
+
+// Get the value from the beginning of the parameter (right to left) and check if the rest of it is
+// zero
+bool U2BE_from_parameter(const uint8_t* parameter, uint16_t* value);
+bool U4BE_from_parameter(const uint8_t* parameter, uint32_t* value);
+
+bool find_selector(uint32_t selector, const uint32_t* array, size_t size, size_t* idx);
diff --git a/src_features/setExternalPlugin/cmd_setExternalPlugin.c b/src_features/setExternalPlugin/cmd_setExternalPlugin.c
index 5960b8a..13d1faf 100644
--- a/src_features/setExternalPlugin/cmd_setExternalPlugin.c
+++ b/src_features/setExternalPlugin/cmd_setExternalPlugin.c
@@ -3,6 +3,7 @@
 #include "public_keys.h"
 #include "eth_plugin_interface.h"
 #include "eth_plugin_internal.h"
+#include "plugin_utils.h"
 #include "common_ui.h"
 #include "os_io_seproxyhal.h"
 
diff --git a/src_features/setPlugin/cmd_setPlugin.c b/src_features/setPlugin/cmd_setPlugin.c
index 1da01a1..3c533c5 100644
--- a/src_features/setPlugin/cmd_setPlugin.c
+++ b/src_features/setPlugin/cmd_setPlugin.c
@@ -3,6 +3,7 @@
 #include "tokens.h"
 #include "eth_plugin_interface.h"
 #include "eth_plugin_internal.h"
+#include "plugin_utils.h"
 #include "utils.h"
 #include "common_ui.h"
 #include "os_io_seproxyhal.h"
diff --git a/src_plugins/erc1155/erc1155_plugin.c b/src_plugins/erc1155/erc1155_plugin.c
index cd79626..b81aa8d 100644
--- a/src_plugins/erc1155/erc1155_plugin.c
+++ b/src_plugins/erc1155/erc1155_plugin.c
@@ -2,6 +2,7 @@
 
 #include <string.h>
 #include "erc1155_plugin.h"
+#include "plugin_utils.h"
 #include "eth_plugin_internal.h"
 #include "eth_plugin_handler.h"
 
diff --git a/src_plugins/erc1155/erc1155_provide_parameters.c b/src_plugins/erc1155/erc1155_provide_parameters.c
index 8895396..6f97943 100644
--- a/src_plugins/erc1155/erc1155_provide_parameters.c
+++ b/src_plugins/erc1155/erc1155_provide_parameters.c
@@ -2,6 +2,7 @@
 
 #include <string.h>
 #include "erc1155_plugin.h"
+#include "plugin_utils.h"
 #include "eth_plugin_internal.h"
 #include "utils.h"
 
diff --git a/src_plugins/erc1155/erc1155_ui.c b/src_plugins/erc1155/erc1155_ui.c
index 888fb23..823e156 100644
--- a/src_plugins/erc1155/erc1155_ui.c
+++ b/src_plugins/erc1155/erc1155_ui.c
@@ -2,6 +2,7 @@
 
 #include <string.h>
 #include "erc1155_plugin.h"
+#include "eth_plugin_internal.h"
 #include "eth_plugin_interface.h"
 #include "utils.h"
 
diff --git a/src_plugins/erc20/erc20_plugin.c b/src_plugins/erc20/erc20_plugin.c
index b5424da..1701da0 100644
--- a/src_plugins/erc20/erc20_plugin.c
+++ b/src_plugins/erc20/erc20_plugin.c
@@ -2,6 +2,7 @@
 #include "eth_plugin_internal.h"
 #include "eth_plugin_handler.h"
 #include "shared_context.h"
+#include "plugin_utils.h"
 #include "ethUstream.h"
 #include "utils.h"
 
diff --git a/src_plugins/erc721/erc721_plugin.c b/src_plugins/erc721/erc721_plugin.c
index 3c8a5a6..bfe12cd 100644
--- a/src_plugins/erc721/erc721_plugin.c
+++ b/src_plugins/erc721/erc721_plugin.c
@@ -1,6 +1,7 @@
 #ifdef HAVE_NFT_SUPPORT
 
 #include <string.h>
+#include "plugin_utils.h"
 #include "erc721_plugin.h"
 #include "eth_plugin_internal.h"
 #include "eth_plugin_interface.h"
diff --git a/src_plugins/erc721/erc721_provide_parameters.c b/src_plugins/erc721/erc721_provide_parameters.c
index ac5b870..18a19cb 100644
--- a/src_plugins/erc721/erc721_provide_parameters.c
+++ b/src_plugins/erc721/erc721_provide_parameters.c
@@ -1,6 +1,7 @@
 #ifdef HAVE_NFT_SUPPORT
 
 #include "erc721_plugin.h"
+#include "plugin_utils.h"
 #include "eth_plugin_internal.h"
 
 static void handle_approve(ethPluginProvideParameter_t *msg, erc721_context_t *context) {
diff --git a/src_plugins/erc721/erc721_ui.c b/src_plugins/erc721/erc721_ui.c
index 7c13778..c68fef1 100644
--- a/src_plugins/erc721/erc721_ui.c
+++ b/src_plugins/erc721/erc721_ui.c
@@ -2,6 +2,7 @@
 
 #include <string.h>
 #include "erc721_plugin.h"
+#include "eth_plugin_internal.h"
 #include "eth_plugin_interface.h"
 #include "utils.h"
 
diff --git a/src_plugins/starkware/starkware_plugin.c b/src_plugins/starkware/starkware_plugin.c
index d05c877..075dfba 100644
--- a/src_plugins/starkware/starkware_plugin.c
+++ b/src_plugins/starkware/starkware_plugin.c
@@ -4,6 +4,7 @@
 #include "shared_context.h"       // TODO : rewrite as independant code
 #include "eth_plugin_internal.h"  // TODO : rewrite as independant code
 #include "stark_utils.h"
+#include "plugin_utils.h"
 #include "utils.h"
 #include "apdu_constants.h"
 
diff --git a/tools/build_sdk.py b/tools/build_sdk.py
index c3ad100..0c4e7f3 100755
--- a/tools/build_sdk.py
+++ b/tools/build_sdk.py
@@ -157,7 +157,7 @@ if __name__ == "__main__":
         "src/tokens.h",
         "src/utils.h",
         "src/tx_content.h",
-        "src/eth_plugin_internal.h",
+        "src/plugin_utils.h",
         "src/nft.h",
         "src/extra_info.h",
         "src/caller_api.h",
@@ -200,7 +200,7 @@ if __name__ == "__main__":
     # extract and merge function bodies
     c_files_to_merge = [
         "src/utils.c",
-        "src/eth_plugin_internal.c",
+        "src/plugin_utils.c",
     ]
     merge_c_files(c_files_to_merge, nodes_to_extract["fn"])