diff --git a/src/eth_plugin_interface.h b/src/eth_plugin_interface.h
index 512716e..31cbbde 100644
--- a/src/eth_plugin_interface.h
+++ b/src/eth_plugin_interface.h
@@ -76,7 +76,7 @@ typedef struct ethPluginInitContract_t {
     ethPluginSharedRO_t *pluginSharedRO;
     uint8_t *pluginContext;
     size_t pluginContextLength;
-    uint8_t *selector;  // 4 bytes selector
+    const uint8_t *selector;  // 4 bytes selector
     size_t dataSize;
 
     char *alias;  // 29 bytes alias if ETH_PLUGIN_RESULT_OK_ALIAS set
@@ -89,7 +89,7 @@ typedef struct ethPluginProvideParameter_t {
     ethPluginSharedRW_t *pluginSharedRW;
     ethPluginSharedRO_t *pluginSharedRO;
     uint8_t *pluginContext;
-    uint8_t *parameter;  // 32 bytes parameter
+    const uint8_t *parameter;  // 32 bytes parameter
     uint32_t parameterOffset;
 
     uint8_t result;
@@ -106,9 +106,9 @@ typedef struct ethPluginFinalize_t {
     uint8_t *tokenLookup1;  // set by the plugin if a token should be looked up
     uint8_t *tokenLookup2;
 
-    uint8_t *amount;   // set an uint256 pointer if uiType is UI_AMOUNT_ADDRESS
-    uint8_t *address;  // set to the destination address if uiType is UI_AMOUNT_ADDRESS. Set to the
-                       // user's address if uiType is UI_TYPE_GENERIC
+    const uint8_t *amount;   // set an uint256 pointer if uiType is UI_AMOUNT_ADDRESS
+    const uint8_t *address;  // set to the destination address if uiType is UI_AMOUNT_ADDRESS. Set
+                             // to the user's address if uiType is UI_TYPE_GENERIC
 
     uint8_t uiType;
     uint8_t numScreens;  // ignored if uiType is UI_AMOUNT_ADDRESS
diff --git a/src_plugins/starkware/starkware_plugin.c b/src_plugins/starkware/starkware_plugin.c
index 104675b..11f7d8e 100644
--- a/src_plugins/starkware/starkware_plugin.c
+++ b/src_plugins/starkware/starkware_plugin.c
@@ -185,7 +185,7 @@ bool is_deversify_contract(const uint8_t *address) {
 }
 
 // TODO : rewrite as independant code
-bool starkware_verify_asset_id(uint8_t *tmp32, uint8_t *tokenId, bool assetTypeOnly) {
+bool starkware_verify_asset_id(uint8_t *tmp32, const uint8_t *tokenId, bool assetTypeOnly) {
     if (quantumSet) {
         cx_sha3_t sha3;
         tokenDefinition_t *currentToken = NULL;
@@ -214,7 +214,7 @@ bool starkware_verify_asset_id(uint8_t *tmp32, uint8_t *tokenId, bool assetTypeO
     return true;
 }
 
-bool starkware_verify_token(uint8_t *token) {
+bool starkware_verify_token(const uint8_t *token) {
     if (quantumSet) {
         if (dataContext.tokenContext.quantumIndex != MAX_ITEMS) {
             tokenDefinition_t *currentToken =
@@ -235,7 +235,7 @@ bool starkware_verify_token(uint8_t *token) {
     return true;
 }
 
-bool starkware_verify_quantum(uint8_t *quantum) {
+bool starkware_verify_quantum(const uint8_t *quantum) {
     if (quantumSet) {
         if (dataContext.tokenContext.quantumIndex != MAX_ITEMS) {
             if (memcmp(quantum, dataContext.tokenContext.quantum, 32) != 0) {
@@ -254,7 +254,7 @@ bool starkware_verify_quantum(uint8_t *quantum) {
     return true;
 }
 
-bool starkware_verify_nft_token_id(uint8_t *tokenId) {
+bool starkware_verify_nft_token_id(const uint8_t *tokenId) {
     if (!quantumSet) {
         PRINTF("Quantum not set\n");
         return false;