From 7e7b40b434aef2a6eeb7337044699572211ed79a Mon Sep 17 00:00:00 2001
From: Jochen Hoenicke <hoenicke@gmail.com>
Date: Sat, 14 Feb 2015 12:00:44 +0100
Subject: [PATCH] Make word list const

This makes the pointers to the words constant.  It moves 8kb from ram
to flash.  It changes the return type of mnemonic_wordlist() to reflect
this change.  Everyone calling it should also change the type to
`const char * const *`.
---
 bip39.c         | 2 +-
 bip39.h         | 2 +-
 bip39_english.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/bip39.c b/bip39.c
index 019259386..7c7858580 100644
--- a/bip39.c
+++ b/bip39.c
@@ -155,7 +155,7 @@ void mnemonic_to_seed(const char *mnemonic, const char *passphrase, uint8_t seed
 	pbkdf2_hmac_sha512((const uint8_t *)mnemonic, strlen(mnemonic), salt, saltlen, BIP39_PBKDF2_ROUNDS, seed, 512 / 8, progress_callback);
 }
 
-const char **mnemonic_wordlist(void)
+const char * const *mnemonic_wordlist(void)
 {
 	return wordlist;
 }
diff --git a/bip39.h b/bip39.h
index cad7a66d3..fe4d99e8a 100644
--- a/bip39.h
+++ b/bip39.h
@@ -36,6 +36,6 @@ int mnemonic_check(const char *mnemonic);
 
 void mnemonic_to_seed(const char *mnemonic, const char *passphrase, uint8_t seed[512 / 8], void (*progress_callback)(uint32_t current, uint32_t total));
 
-const char **mnemonic_wordlist(void);
+const char * const *mnemonic_wordlist(void);
 
 #endif
diff --git a/bip39_english.h b/bip39_english.h
index 4ecddba4b..233acc2f8 100644
--- a/bip39_english.h
+++ b/bip39_english.h
@@ -21,7 +21,7 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-const char *wordlist[] = {
+const char * const wordlist[] = {
 "abandon",
 "ability",
 "able",