Phase 5: Wire main/ shims to components/tollgate_core

- session.c/h: thin shim casting session_t* <-> tg_session_t*, delegates to tollgate_core_session_*
- firewall.c/h: keeps ESP-specific lwIP hooks, delegates allowlist to tollgate_core_fw_*
- cashu.c/h: shim delegates to tollgate_core_cashu_*, multi-mint via config directly
- mining_payment.c: shim delegates to tollgate_core_mining_*
- tollgate_main.c: calls tollgate_core_init(tollgate_esp_get_platform(), ap_ip) in start_services()
- tollgate_esp: removed target_sources for standalone sources, depends on tollgate_core component
- tollgate_core component: added tollgate_core_get_platform(), tg_payment_method_t enum
- Unit tests: updated Makefile for component source compilation, all 22 tests pass
- Hardware verified: Board A boots, AP visible, 5/6 smoke tests pass (internet test needs upstream WiFi)

3 files changed, 18 insertions, 0 deletions

diff --git a/components/tollgate_core/src/tollgate_core.c b/components/tollgate_core/src/tollgate_core.c
index a731f48..2b337c3 100644
--- a/components/tollgate_core/src/tollgate_core.c
+++ b/components/tollgate_core/src/tollgate_core.c
@@ -234,3 +234,8 @@ bool tollgate_core_is_owner_connected(void)
 {
     return s_owner_connected;
 }
+
+const tollgate_platform_t *tollgate_core_get_platform(void)
+{
+    return s_platform;
+}
diff --git a/components/tollgate_core/src/tollgate_core_session.c b/components/tollgate_core/src/tollgate_core_session.c
index 48d32e7..2329e0d 100644
--- a/components/tollgate_core/src/tollgate_core_session.c
+++ b/components/tollgate_core/src/tollgate_core_session.c
@@ -62,6 +62,7 @@ tg_session_t *tollgate_core_session_create(uint32_t client_ip, uint64_t allotmen
             s_sessions[i].allotment_ms = allotment_ms;
             s_sessions[i].start_time_ms = get_time_ms();
             s_sessions[i].active = true;
+            s_sessions[i].payment_method = TG_PAYMENT_CASHU;
             populate_mac(&s_sessions[i], client_ip);
 
             s_session_count++;
@@ -86,6 +87,7 @@ tg_session_t *tollgate_core_session_create_bytes(uint32_t client_ip, uint64_t al
         s->allotment_bytes = allotment_bytes;
         s->bytes_consumed = 0;
         s->allotment_ms = INT64_MAX;
+        s->payment_method = TG_PAYMENT_BYTES;
         esp_ip4_addr_t ip = { .addr = client_ip };
         ESP_LOGI(TAG, "Bytes session created: " IPSTR " allotment=%llu bytes", IP2STR(&ip),
                  (unsigned long long)allotment_bytes);
@@ -135,6 +137,10 @@ bool tollgate_core_session_is_expired(const tg_session_t *session)
 {
     if (!session || !session->active) return true;
 
+    if (session->payment_method == TG_PAYMENT_BYTES) {
+        return session->bytes_consumed >= session->allotment_bytes;
+    }
+
     if (s_platform && s_platform->get_metric) {
         const char *metric = s_platform->get_metric();
         if (metric && strcmp(metric, "bytes") == 0) {
diff --git a/components/tollgate_core/src/tollgate_core_session.h b/components/tollgate_core/src/tollgate_core_session.h
index 444b9fa..b612f21 100644
--- a/components/tollgate_core/src/tollgate_core_session.h
+++ b/components/tollgate_core/src/tollgate_core_session.h
@@ -9,6 +9,12 @@
 #define TG_SESSION_MAX_CLIENTS     10
 #define TG_SESSION_MAX_MAC_LEN     18
 
+typedef enum {
+    TG_PAYMENT_CASHU,
+    TG_PAYMENT_MINING,
+    TG_PAYMENT_BYTES
+} tg_payment_method_t;
+
 typedef struct {
     uint32_t client_ip;
     char mac[TG_SESSION_MAX_MAC_LEN];
@@ -16,6 +22,7 @@ typedef struct {
     int64_t start_time_ms;
     uint64_t allotment_bytes;
     uint64_t bytes_consumed;
+    tg_payment_method_t payment_method;
     bool active;
 } tg_session_t;