feat: multi-mint config array and acceptance check (Phase 1+2)

- config.h: increase TOLLGATE_MAX_MINT_URLS to 8, add accepted_mints[] to config struct
- config.c: parse accepted_mints JSON array, fallback to mint_url for backward compat
- cashu.c: cashu_is_mint_accepted() iterates accepted_mints[] instead of single mint_url

1 files changed, 3 insertions, 1 deletions

diff --git a/main/config.h b/main/config.h
index fa4d95c..8e12878 100644
--- a/main/config.h
+++ b/main/config.h
@@ -9,7 +9,7 @@
 #include "lightning_payout.h"
 
 #define TOLLGATE_MAX_WIFI_NETWORKS 5
-#define TOLLGATE_MAX_MINT_URLS     3
+#define TOLLGATE_MAX_MINT_URLS     8
 #define TOLLGATE_MAX_AP_SSID_LEN   32
 #define TOLLGATE_MAX_AP_PASS_LEN   64
 #define TOLLGATE_MAX_RELAYS        4
@@ -40,6 +40,8 @@ typedef struct {
     char ap_ip_str[16];
 
     char mint_url[256];
+    char accepted_mints[TOLLGATE_MAX_MINT_URLS][256];
+    int accepted_mint_count;
     char lnurl_url[256];
     int price_per_step;
     int step_size_ms;