From bbcfe5abc3aaca5e7cbdc16546a0539ce19b914e Mon Sep 17 00:00:00 2001
From: Alexandre Paillier <alexandre.paillier@ledger.fr>
Date: Wed, 8 Jun 2022 11:38:08 +0200
Subject: [PATCH] Added a util function to convert from byte buffer to
 uint128_t

---
 src/utils.c             | 14 ++++++++++++--
 src/utils.h             |  1 +
 src_common/ethUstream.h |  1 +
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/utils.c b/src/utils.c
index be55825..3fb4cc9 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -20,6 +20,7 @@
 
 #include "ethUstream.h"
 #include "ethUtils.h"
+#include "uint128.h"
 #include "uint256.h"
 #include "tokens.h"
 #include "utils.h"
@@ -33,10 +34,19 @@ void array_hexstr(char *strbuf, const void *bin, unsigned int len) {
     *strbuf = 0;  // EOS
 }
 
+void convertUint128BE(const uint8_t *const data, uint32_t length, uint128_t *const target) {
+    uint8_t tmp[INT128_LENGTH];
+
+    memset(tmp, 0, sizeof(tmp) - length);
+    memmove(tmp + sizeof(tmp) - length, data, length);
+    readu128BE(tmp, target);
+}
+
 void convertUint256BE(const uint8_t *const data, uint32_t length, uint256_t *const target) {
     uint8_t tmp[INT256_LENGTH];
-    memset(tmp, 0, 32);
-    memmove(tmp + 32 - length, data, length);
+
+    memset(tmp, 0, sizeof(tmp) - length);
+    memmove(tmp + sizeof(tmp) - length, data, length);
     readu256BE(tmp, target);
 }
 
diff --git a/src/utils.h b/src/utils.h
index 407039b..ce39d65 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -24,6 +24,7 @@
 
 void array_hexstr(char* strbuf, const void* bin, unsigned int len);
 
+void convertUint128BE(const uint8_t *const data, uint32_t length, uint128_t *const target);
 void convertUint256BE(const uint8_t *const data, uint32_t length, uint256_t *const target);
 
 uint64_t u64_from_BE(const uint8_t* in, uint8_t size);
diff --git a/src_common/ethUstream.h b/src_common/ethUstream.h
index 4229d40..ed5aea3 100644
--- a/src_common/ethUstream.h
+++ b/src_common/ethUstream.h
@@ -37,6 +37,7 @@ typedef customStatus_e (*ustreamProcess_t)(struct txContext_t *context);
 
 #define TX_FLAG_TYPE   0x01
 #define ADDRESS_LENGTH 20
+#define INT128_LENGTH  16
 #define INT256_LENGTH  32
 
 // First variant of every Tx enum.