From 3faa172ec2748f655c64444c624a0b08739045ad Mon Sep 17 00:00:00 2001
From: pscott <scott.piriou@ledger.fr>
Date: Thu, 15 Apr 2021 15:36:21 +0200
Subject: [PATCH] Add MAX and MIN tx types

---
 src_common/ethUstream.c | 6 +++++-
 src_common/ethUstream.h | 6 ++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src_common/ethUstream.c b/src_common/ethUstream.c
index a97a418..18cd896 100644
--- a/src_common/ethUstream.c
+++ b/src_common/ethUstream.c
@@ -265,9 +265,13 @@ static parserStatus_e processTxInternal(txContext_t *context) {
         }
         // EIP 2718: TransactionType might be present before the TransactionPayload.
         if (*context->workBuffer > 0x00 && *context->workBuffer < 0x7f) {
+            PRINTF("TX TYPE: %u\n", context->txType);
+            if (*context->workBuffer < MIN_TX_TYPE || *context->workBuffer > MAX_TX_TYPE ) {
+                PRINTF("Transaction type not supported\n");
+                return USTREAM_FAULT;
+            }
             context->txType = *context->workBuffer;
             context->workBuffer++;
-            PRINTF("TX TYPE: %u\n", context->txType);
         }
         if (!context->processingField) {
             PRINTF("PROCESSING FIELD\n");
diff --git a/src_common/ethUstream.h b/src_common/ethUstream.h
index 24cbaa0..cd30835 100644
--- a/src_common/ethUstream.h
+++ b/src_common/ethUstream.h
@@ -55,8 +55,10 @@ typedef enum rlpTxField_e {
 
 // EIP 2718 TransactionType
 typedef enum txType_e {
-    LegacyTransaction = 1,
-    BerlinTransaction = 2
+    MIN_TX_TYPE,
+    LEGACY_TX,
+    BERLIN_TX,
+    MAX_TX_TYPE,
 } txType_e;
 
 typedef enum parserStatus_e {