From 32844ac7c4a135659714aabf7d2414f156176d72 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Sun, 17 May 2026 01:39:03 +0530
Subject: test_cashu (10/10) + test_session (18/18): all 86 unit tests passing

- Expand esp_http_client.h stub: full config struct + method enum + init/perform/cleanup
- Add portTICK_PERIOD_MS + esp_err_to_name to stubs
- session.c: reject duplicate spent secrets in session_create (double-spend protection)
- .gitignore: add test binaries
---
 .gitignore                           |  5 +++++
 main/session.c                       |  7 ++++++
 tests/unit/stubs/esp_err.h           |  2 ++
 tests/unit/stubs/esp_http_client.h   | 43 +++++++++++++++++++++++++++++++++++-
 tests/unit/stubs/freertos/FreeRTOS.h |  1 +
 5 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 67133d5..e50f050 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,8 @@ __pycache__/
 *.map
  NAND/
 main/config.json
+tests/unit/test_geohash
+tests/unit/test_identity
+tests/unit/test_nostr_event
+tests/unit/test_cashu
+tests/unit/test_session
diff --git a/main/session.c b/main/session.c
index 5d2efee..521b74a 100644
--- a/main/session.c
+++ b/main/session.c
@@ -50,6 +50,13 @@ session_t *session_create(uint32_t client_ip, uint64_t allotment_ms,
         return existing;
     }
 
+    for (int i = 0; i < secret_count; i++) {
+        if (session_is_secret_spent(spent_secrets[i])) {
+            ESP_LOGW(TAG, "Duplicate secret rejected");
+            return NULL;
+        }
+    }
+
     if (s_session_count >= SESSION_MAX_CLIENTS) {
         for (int i = 0; i < SESSION_MAX_CLIENTS; i++) {
             if (!s_sessions[i].active || session_is_expired(&s_sessions[i])) {
diff --git a/tests/unit/stubs/esp_err.h b/tests/unit/stubs/esp_err.h
index 84c3734..9bedb72 100644
--- a/tests/unit/stubs/esp_err.h
+++ b/tests/unit/stubs/esp_err.h
@@ -13,6 +13,8 @@ typedef int esp_err_t;
 #define ESP_ERR_NO_MEM       0x101
 #define ESP_ERR_NOT_FOUND    0x104
 
+static inline const char *esp_err_to_name(esp_err_t err) { (void)err; return "ESP_OK"; }
+
 #define ESP_ERROR_CHECK(x) do { if ((x) != 0) { fprintf(stderr, "ESP_ERROR_CHECK failed: 0x%x\n", (int)(x)); abort(); } } while(0)
 
 #endif
diff --git a/tests/unit/stubs/esp_http_client.h b/tests/unit/stubs/esp_http_client.h
index 4169714..288ce3b 100644
--- a/tests/unit/stubs/esp_http_client.h
+++ b/tests/unit/stubs/esp_http_client.h
@@ -2,11 +2,52 @@
 #define STUBS_ESP_HTTP_CLIENT_H
 
 #include "esp_err.h"
+#include <string.h>
+#include <stdlib.h>
 
-typedef void *esp_http_client_handle_t;
+typedef enum {
+    HTTP_METHOD_GET = 0,
+    HTTP_METHOD_POST,
+    HTTP_METHOD_PUT,
+    HTTP_METHOD_DELETE,
+} esp_http_client_method_t;
+
+typedef void *esp_crt_bundle_attach_fn_t(void *conf);
 
 typedef struct {
+    const char *url;
+    esp_http_client_method_t method;
+    int timeout_ms;
+    esp_crt_bundle_attach_fn_t *crt_bundle_attach;
     int cert_pem;
 } esp_http_client_config_t;
 
+typedef void *esp_http_client_handle_t;
+
+static inline esp_http_client_handle_t esp_http_client_init(const esp_http_client_config_t *cfg) {
+    (void)cfg;
+    return (void *)malloc(1);
+}
+static inline esp_err_t esp_http_client_set_header(esp_http_client_handle_t c, const char *k, const char *v) {
+    (void)c; (void)k; (void)v; return ESP_OK;
+}
+static inline esp_err_t esp_http_client_open(esp_http_client_handle_t c, int len) {
+    (void)c; (void)len; return ESP_OK;
+}
+static inline int esp_http_client_write(esp_http_client_handle_t c, const char *buf, int len) {
+    (void)c; (void)buf; return len;
+}
+static inline int esp_http_client_fetch_headers(esp_http_client_handle_t c) {
+    (void)c; return 0;
+}
+static inline int esp_http_client_get_status_code(esp_http_client_handle_t c) {
+    (void)c; return 200;
+}
+static inline int esp_http_client_read(esp_http_client_handle_t c, char *buf, int len) {
+    (void)c; (void)buf; (void)len; return 0;
+}
+static inline esp_err_t esp_http_client_cleanup(esp_http_client_handle_t c) {
+    free(c); return ESP_OK;
+}
+
 #endif
diff --git a/tests/unit/stubs/freertos/FreeRTOS.h b/tests/unit/stubs/freertos/FreeRTOS.h
index 0fee758..696da87 100644
--- a/tests/unit/stubs/freertos/FreeRTOS.h
+++ b/tests/unit/stubs/freertos/FreeRTOS.h
@@ -6,6 +6,7 @@
 static inline uint32_t xTaskGetTickCount(void) { return 0; }
 static inline void vTaskDelay(uint32_t ticks) { (void)ticks; }
 #define pdMS_TO_TICKS(ms) ((ms) / 10)
+#define portTICK_PERIOD_MS 10
 #define portMAX_DELAY 0xFFFFFFFF
 
 #endif
-- 
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