diff --git a/src/main.c b/src/main.c
index d42d390..067fab5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -953,17 +953,6 @@ const bagl_element_t ui_data_parameter_blue[] = {
   {{BAGL_RECTANGLE | BAGL_FLAG_TOUCHABLE, 0x00, 165, 414, 115,  36, 0,18, BAGL_FILL, 0x41ccb4, COLOR_BG_1, BAGL_FONT_OPEN_SANS_REGULAR_11_14PX|BAGL_FONT_ALIGNMENT_CENTER|BAGL_FONT_ALIGNMENT_MIDDLE, 0 }, "CONFIRM", 0, 0x3ab7a2, COLOR_BG_1, io_seproxyhal_touch_data_ok, NULL, NULL},
 };
 
-int local_strchr(char *string, char ch) {
-    unsigned int length = strlen(string);
-    unsigned int i;
-    for (i=0; i<length; i++) {
-        if (string[i] == ch) {
-            return i;
-        }
-    }
-    return -1;
-}
-
 unsigned int ui_data_parameter_blue_prepro(const bagl_element_t* element) {
   copy_element_and_map_coin_colors(element);
   if(element->component.userid > 0) {
@@ -1096,33 +1085,6 @@ unsigned int ui_address_nanos_button(unsigned int button_mask, unsigned int butt
 }
 #endif // #if defined(TARGET_NANOS)
 
-uint32_t getV(txContent_t *txContent) {
-    uint32_t v = 0;
-    if (txContent->vLength == 1) {
-      v = txContent->v[0];
-    }
-    else
-    if (txContent->vLength == 2) {
-      v = (txContent->v[0] << 8) | txContent->v[1];
-    }
-    else
-    if (txContent->vLength == 3) {
-      v = (txContent->v[0] << 16) | (txContent->v[1] << 8) | txContent->v[2];
-    }
-    else
-    if (txContent->vLength == 4) {
-      v = (txContent->v[0] << 24) | (txContent->v[1] << 16) |
-          (txContent->v[2] << 8) | txContent->v[3];
-    }
-    else
-    if (txContent->vLength != 0) {
-        PRINTF("Unexpected v format\n");
-        THROW(EXCEPTION);
-    }
-    return v;
-
-}
-
 void io_seproxyhal_send_status(uint32_t sw) {
     G_io_apdu_buffer[0] = ((sw >> 8) & 0xff);
     G_io_apdu_buffer[1] = (sw & 0xff);
@@ -1411,13 +1373,6 @@ uint32_t set_result_get_publicKey() {
     return tx;
 }
 
-void convertUint256BE(uint8_t *data, uint32_t length, uint256_t *target) {
-    uint8_t tmp[32];
-    os_memset(tmp, 0, 32);
-    os_memmove(tmp + 32 - length, data, length);
-    readu256BE(tmp, target);
-}
-
 uint32_t splitBinaryParameterPart(char *result, uint8_t *parameter) {
     uint32_t i;
     for (i=0; i<8; i++) {
diff --git a/src/utils.c b/src/utils.c
index d7e0602..e40c8ed 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -15,6 +15,12 @@
 *  limitations under the License.
 ********************************************************************************/
 
+#include <stdint.h>
+#include <string.h>
+
+#include "ethUstream.h"
+#include "uint256.h"
+
 static const unsigned char hex_digits[] = {'0', '1', '2', '3', '4', '5', '6', '7',
                                            '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
 
@@ -25,4 +31,48 @@ void array_hexstr(char *strbuf, const void *bin, unsigned int len) {
         bin = (const void *)((unsigned int)bin + 1);
     }
     *strbuf = 0; // EOS
+}
+
+void convertUint256BE(uint8_t *data, uint32_t length, uint256_t *target) {
+    uint8_t tmp[32];
+    os_memset(tmp, 0, 32);
+    os_memmove(tmp + 32 - length, data, length);
+    readu256BE(tmp, target);
+}
+
+int local_strchr(char *string, char ch) {
+    unsigned int length = strlen(string);
+    unsigned int i;
+    for (i=0; i<length; i++) {
+        if (string[i] == ch) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+uint32_t getV(txContent_t *txContent) {
+    uint32_t v = 0;
+    if (txContent->vLength == 1) {
+      v = txContent->v[0];
+    }
+    else
+    if (txContent->vLength == 2) {
+      v = (txContent->v[0] << 8) | txContent->v[1];
+    }
+    else
+    if (txContent->vLength == 3) {
+      v = (txContent->v[0] << 16) | (txContent->v[1] << 8) | txContent->v[2];
+    }
+    else
+    if (txContent->vLength == 4) {
+      v = (txContent->v[0] << 24) | (txContent->v[1] << 16) |
+          (txContent->v[2] << 8) | txContent->v[3];
+    }
+    else
+    if (txContent->vLength != 0) {
+        PRINTF("Unexpected v format\n");
+        THROW(EXCEPTION);
+    }
+    return v;
 }
\ No newline at end of file
diff --git a/src/utils.h b/src/utils.h
index 1c15584..d918475 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -18,6 +18,16 @@
 #ifndef _UTILS_H_
 #define _UTILS_H_
 
+#include <stdint.h>
+
+#include "uint256.h"
+
 void array_hexstr(char *strbuf, const void *bin, unsigned int len);
 
+void convertUint256BE(uint8_t *data, uint32_t length, uint256_t *target);
+
+int local_strchr(char *string, char ch);
+
+uint32_t getV(txContent_t *txContent);
+
 #endif /* _UTILS_H_ */
\ No newline at end of file