New constants

app/src/constants.h

@@ -15,6 +15,9 @@
  ********************************************************************************/
 #define U128_STR_MAX_LEN 40
 
+// raw address len before encoding
+#define ADDRESS_LEN_BYTES 80
+
 // Common BECH32m constants
 #define CHECKSUM_LENGTH 8
 #define BECH32_BITS_PER_CHAR 5
@@ -39,3 +42,13 @@
 #define ENCODED_ADDR_LEN (ADDR_HRP_LENGTH + SEPARATOR_LENGTH + ENCODED_DATA_LENGTH)
 
 #define ENCODED_ADDR_BUFFER_SIZE (ENCODED_ADDR_LEN + 2)
+
+
+// MEMO transaction constants
+#dfine MEMO_CIPHERTEXT_LEN_BYTES 528
+
+// This is the `MEMO_CIPHERTEXT_LEN_BYTES` - MAC size (16 bytes).
+#define MEMO_LEN_BYTES 512
+
+// This is the largest text length we can support
+#define MAX_TEXT_LEN MEMO_LEN_BYTES - ADDRESS_LEN_BYTES

app/src/keys_def.h

@@ -32,9 +32,6 @@ extern "C" {
 #define INCOMING_VIEWING_KEY_LEN KEY_LEN     // Assuming modulo r size
 #define ADDR_MAX_ENC_LEN 150                 // The maximun length of the encoded address
 
-// raw address len before encoding
-#define ADDRESS_LEN_BYTES 80
-
 /// Number of bits in the address short form divided by the number of bits per Bech32m character
 #define ADDRESS_NUM_CHARS_SHORT_FORM 24