diff --git a/app/src/addr.c b/app/src/addr.c
index c23120f..09d7457 100644
--- a/app/src/addr.c
+++ b/app/src/addr.c
@@ -26,29 +26,10 @@
 #include "zxerror.h"
 #include "zxformat.h"
 #include "zxmacros.h"
+#include "ui_utils.h"
 
 bool is_randomized = false;
 
-#define BECH32_PREFIX "penumbra"
-
-#define FIXED_PREFIX BECH32_PREFIX "1"
-#define ADDRESS_NUM_CHARS_SHORT_FORM 24
-#define NUM_CHARS_TO_DISPLAY 33
-
-#define HRP_LENGTH (sizeof(FIXED_PREFIX) - 1)
-#define RAW_ADDRESS_LENGTH 80
-#define CHECKSUM_LENGTH 8
-#define SEPARATOR_LENGTH 1
-
-#define BECH32_BITS_PER_CHAR 5
-#define BITS_PER_BYTE 8
-
-#define ENCODED_DATA_LENGTH \
-    (((RAW_ADDRESS_LENGTH + CHECKSUM_LENGTH) * BITS_PER_BYTE + BECH32_BITS_PER_CHAR - 1) / BECH32_BITS_PER_CHAR)
-
-#define ENCODED_ADDR_LEN (HRP_LENGTH + SEPARATOR_LENGTH + ENCODED_DATA_LENGTH)
-
-#define ENCODED_ADDR_BUFFER_SIZE (ENCODED_ADDR_LEN + 2)
 
 zxerr_t addr_getNumItems(uint8_t *num_items) {
     zemu_log_stack("addr_getNumItems");
@@ -65,16 +46,15 @@ zxerr_t addr_getItem(int8_t displayIdx, char *outKey, uint16_t outKeyLen, char *
                      uint8_t *pageCount) {
     ZEMU_LOGF(50, "[addr_getItem] %d/%d\n", displayIdx, pageIdx)
 
-    char encoded_addr[ENCODED_ADDR_BUFFER_SIZE] = {'\0'};
+    char encoded_addr[ENCODED_ADDR_BUFFER_SIZE + 1] = {'\0'};
 
     switch (displayIdx) {
         case 0:
             snprintf(outKey, outKeyLen, "Address");
 
-            int32_t ret = rs_bech32_encode((const uint8_t *)BECH32_PREFIX, sizeof(BECH32_PREFIX) - 1, G_io_apdu_buffer,
-                                           ADDRESS_LEN_BYTES, (uint8_t *)encoded_addr, ENCODED_ADDR_BUFFER_SIZE);
-
-            if (ret < 0) return zxerr_unknown;
+            if (printAddress(G_io_apdu_buffer, ADDRESS_LEN_BYTES, encoded_addr, ENCODED_ADDR_BUFFER_SIZE) != parser_ok) {
+                return zxerr_unknown;
+            }
 
             pageString(outVal, outValLen, encoded_addr, pageIdx, pageCount);
 
diff --git a/app/src/keys_def.h b/app/src/keys_def.h
index 2ade8f8..7c5bf7d 100644
--- a/app/src/keys_def.h
+++ b/app/src/keys_def.h
@@ -42,6 +42,26 @@ extern "C" {
 
 #define ADDR_RANDOMIZER_LEN 12
 
+#define BECH32_PREFIX "penumbra"
+
+#define FIXED_PREFIX BECH32_PREFIX "1"
+#define ADDRESS_NUM_CHARS_SHORT_FORM 24
+#define NUM_CHARS_TO_DISPLAY 33
+
+#define HRP_LENGTH (sizeof(FIXED_PREFIX) - 1)
+#define CHECKSUM_LENGTH 8
+#define SEPARATOR_LENGTH 1
+
+#define BECH32_BITS_PER_CHAR 5
+#define BITS_PER_BYTE 8
+
+#define ENCODED_DATA_LENGTH \
+    (((ADDRESS_LEN_BYTES + CHECKSUM_LENGTH) * BITS_PER_BYTE + BECH32_BITS_PER_CHAR - 1) / BECH32_BITS_PER_CHAR)
+
+#define ENCODED_ADDR_LEN (HRP_LENGTH + SEPARATOR_LENGTH + ENCODED_DATA_LENGTH)
+
+#define ENCODED_ADDR_BUFFER_SIZE (ENCODED_ADDR_LEN + 2)
+
 // raw keys in bytes
 
 /** The spending key consists of spend_key_bytes and ask.
diff --git a/app/src/ui_utils.c b/app/src/ui_utils.c
new file mode 100644
index 0000000..15b2724
--- /dev/null
+++ b/app/src/ui_utils.c
@@ -0,0 +1,46 @@
+/*******************************************************************************
+ *   (c) 2018 - 2023 Zondax AG
+ *
+ *  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.
+ ********************************************************************************/
+
+#include <stdio.h>
+
+#include "parser_common.h"
+#include "keys_def.h"
+#include "rslib.h"
+#include "zxerror.h"
+#include "zxformat.h"
+#include "zxmacros.h"
+
+parser_error_t printAddress(uint8_t *address, uint16_t address_len, char *out, uint16_t out_len) {
+    if (address_len != ADDRESS_LEN_BYTES) {
+        return parser_invalid_address;
+    }
+
+    // check we have space for the null terminator
+    if (out_len < ENCODED_ADDR_BUFFER_SIZE + 1) {
+        return parser_display_idx_out_of_range;
+    }
+
+    MEMZERO(out, out_len);
+
+    int32_t ret = rs_bech32_encode((const uint8_t *)BECH32_PREFIX, sizeof(BECH32_PREFIX) - 1, address,
+                                           address_len, (uint8_t *)out, out_len);
+
+    if (ret < 0) {
+        return parser_unexpected_error;
+    }
+
+    return parser_ok;
+}
diff --git a/app/src/ui_utils.h b/app/src/ui_utils.h
new file mode 100644
index 0000000..13eb7a6
--- /dev/null
+++ b/app/src/ui_utils.h
@@ -0,0 +1,19 @@
+/*******************************************************************************
+ *  (c) 2018 - 2023 Zondax AG
+ *
+ *  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
+
+
+parser_error_t printAddress(uint8_t *address, uint16_t address_len, char *out, uint16_t out_len);