From a617200c9c45a1726348b08e765201de4e20ae74 Mon Sep 17 00:00:00 2001
From: Alex Beregszaszi <alex@rtfs.hu>
Date: Wed, 25 May 2016 15:33:23 +0100
Subject: [PATCH] Add confirmation dialog to EthereumSignTx

---
 firmware/ethereum.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/firmware/ethereum.c b/firmware/ethereum.c
index 840a5e007..4a25b38f4 100644
--- a/firmware/ethereum.c
+++ b/firmware/ethereum.c
@@ -27,6 +27,7 @@
 #include "crypto.h"
 #include "secp256k1.h"
 #include "sha3.h"
+#include "util.h"
 
 static bool signing = false;
 static size_t data_left;
@@ -156,6 +157,30 @@ static void send_signature(void)
 	ethereum_signing_abort();
 }
 
+/* FIXME */
+static void layoutEthereumConfirmTx(const uint8_t *to, const uint8_t *value)
+{
+	static char _value[21] = {0};
+	static char _to1[21] = {0};
+	static char _to2[21] = {0};
+
+	data2hex(value, 10, _value);
+	data2hex(to, 10, _to1);
+	data2hex(to + 10, 10, _to2);
+
+	layoutDialogSwipe(DIALOG_ICON_QUESTION,
+		"Cancel",
+		"Confirm",
+		NULL,
+		"Really send",
+		_value,
+		"from your wallet?",
+		"To:",
+		_to1,
+		_to2
+	);
+}
+
 /*
  * RLP fields:
  * - nonce (0 .. 32)
@@ -188,6 +213,14 @@ void ethereum_signing_init(EthereumSignTx *msg, const HDNode *node)
 		return;
 	}
 
+	/* FIXME: include default values (0 / 0) */
+	layoutEthereumConfirmTx(msg->has_to ? msg->to.bytes : NULL, msg->has_value ? msg->value.bytes : NULL);
+	if (!protectButton(ButtonRequestType_ButtonRequest_SignTx, false)) {
+		fsm_sendFailure(FailureType_Failure_ActionCancelled, "Signing cancelled by user");
+		ethereum_signing_abort();
+		return;
+	}
+
 	/* Stage 1: Calculate total RLP length */
 	int total_rlp_length = 0;
 	int total_data_length = 0;