1 files changed, 46 insertions, 0 deletions

diff --git a/main/relay_selector.h b/main/relay_selector.h
new file mode 100644
index 0000000..4403944
--- /dev/null
+++ b/main/relay_selector.h
@@ -0,0 +1,46 @@
+#ifndef RELAY_SELECTOR_H
+#define RELAY_SELECTOR_H
+
+#include "esp_err.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include <stdbool.h>
+#include <stdint.h>
+
+#define RELAY_SELECTOR_MAX_RELAYS 8
+#define RELAY_SELECTOR_URL_LEN   128
+
+typedef struct {
+    char url[RELAY_SELECTOR_URL_LEN];
+    char name[64];
+    uint32_t latency_ms;
+    bool supports_nip77;
+    bool alive;
+    int consecutive_failures;
+    uint32_t last_probe_time;
+    uint8_t supported_nips[32];
+    size_t nips_count;
+} relay_info_t;
+
+typedef struct {
+    relay_info_t relays[RELAY_SELECTOR_MAX_RELAYS];
+    size_t count;
+    int primary_idx;
+    int fallback_idx;
+    uint32_t last_full_probe;
+    SemaphoreHandle_t lock;
+} relay_selector_t;
+
+esp_err_t relay_selector_init(relay_selector_t *sel);
+void relay_selector_destroy(relay_selector_t *sel);
+
+esp_err_t relay_selector_probe_all(relay_selector_t *sel);
+
+const relay_info_t *relay_selector_get_primary(relay_selector_t *sel);
+const relay_info_t *relay_selector_get_fallback(relay_selector_t *sel, int idx);
+
+void relay_selector_report_disconnect(relay_selector_t *sel, const char *url);
+
+esp_err_t relay_selector_seed_from_config(relay_selector_t *sel);
+
+#endif