feat: add switchable SlipOK and Slip2Go verification

.env.example

@@ -23,9 +23,17 @@ DISCORD_REDIRECT_URI=https://YOUR_BASE_URL/rubgram/callback
 DISCORD_WEBHOOK_URL=YOUR_DISCORD_WEBHOOK_URL # For Rubgram calling
 WEBHOOK_RUBGRAM_SUBMIT=YOUR_WEBHOOK_RUBGRAM_SUBMIT # For Rubgram submit
 
-# Payment (Rubgram) https://slipok.com/
+# Slip verification (Rubgram + donations): select provider in /admin/settings
+# SlipOK (default) https://slipok.com/
 SLIPOK_API_URL=YOUR_SLIPOK_API_URL
 SLIPOK_API_KEY=YOUR_SLIPOK_API_KEY
+# Slip2Go: full URL ending in /api/verify-slip/qr-image/info
+SLIP2GO_VERIFY_URL=YOUR_SLIP2GO_IMAGE_API_URL
+SLIP2GO_API_SECRET=YOUR_SLIP2GO_SECRET_KEY
+# Both payment flows must receive into this PromptPay account when using Slip2Go.
+# mobile, nationalId, or ewallet
+PROMPTPAY_TYPE=mobile
+PROMPTPAY_IDENTIFIER=YOUR_PROMPTPAY_IDENTIFIER
 
 # Donate-related
 # Gemini TTS API
@@ -40,4 +48,4 @@ DONATE_WIDGET_KEY=RANDOM_GENERATED
 # Environment
 ENVIRONMENT=production
 
-NEXT_SERVER_ACTIONS_ENCRYPTION_KEY="openssl rand -base64 32"
+NEXT_SERVER_ACTIONS_ENCRYPTION_KEY="openssl rand -base64 32"