From 5dbf35051a969cec0d9d1e23a39d23b8942038b6 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sun, 8 Mar 2026 20:58:13 -1000
Subject: [PATCH] [api] Add explicit static_cast<uint32_t> for tag/field_length
 narrowing
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Consistency with frame helper code — makes the uint64→uint32 narrowing
explicit on BLE builds where proto_varint_value_t is uint64_t.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 esphome/components/api/proto.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/esphome/components/api/proto.cpp b/esphome/components/api/proto.cpp
index e35565dd6d..8959ac7a2a 100644
--- a/esphome/components/api/proto.cpp
+++ b/esphome/components/api/proto.cpp
@@ -69,7 +69,7 @@ uint32_t ProtoDecodableMessage::count_repeated_field(const uint8_t *buffer, size
       break;  // Invalid data, stop counting
     }
 
-    uint32_t tag = res.value;
+    uint32_t tag = static_cast<uint32_t>(res.value);
     uint32_t field_type = tag & WIRE_TYPE_MASK;
     uint32_t field_id = tag >> 3;
     ptr += res.consumed;
@@ -94,7 +94,7 @@ uint32_t ProtoDecodableMessage::count_repeated_field(const uint8_t *buffer, size
         if (!res.has_value()) {
           return count;
         }
-        uint32_t field_length = res.value;
+        uint32_t field_length = static_cast<uint32_t>(res.value);
         ptr += res.consumed;
         if (field_length > static_cast<size_t>(end - ptr)) {
           return count;  // Out of bounds
@@ -215,7 +215,7 @@ void ProtoDecodableMessage::decode(const uint8_t *buffer, size_t length) {
       return;
     }
 
-    uint32_t tag = res.value;
+    uint32_t tag = static_cast<uint32_t>(res.value);
     uint32_t field_type = tag & WIRE_TYPE_MASK;
     uint32_t field_id = tag >> 3;
     ptr += res.consumed;
@@ -240,7 +240,7 @@ void ProtoDecodableMessage::decode(const uint8_t *buffer, size_t length) {
           ESP_LOGV(TAG, "Invalid Length Delimited at offset %ld", (long) (ptr - buffer));
           return;
         }
-        uint32_t field_length = res.value;
+        uint32_t field_length = static_cast<uint32_t>(res.value);
         ptr += res.consumed;
         if (field_length > static_cast<size_t>(end - ptr)) {
           ESP_LOGV(TAG, "Out-of-bounds Length Delimited at offset %ld", (long) (ptr - buffer));