option to set provider fees

.env.example

@@ -4,6 +4,7 @@ DESCRIPTION = "A short Description"
 # Any openai-compatible api endpoint
 UPSTREAM_BASE_URL="https://api.openai.com/v1"
 UPSTREAM_API_KEY="sk-21212121212121212121212121212121"
+# UPSTREAM_PROVIDER_FEE=1  # 1 = no fees, 1.05 = 5% fees
 
 # Lightning address used to receive funds
 RECEIVE_LN_ADDRESS="shroominic@walletofsatoshi.com"
@@ -20,6 +21,7 @@ MODEL_BASED_PRICING = "true"
 # COST_PER_REQUEST="10"
 # COST_PER_1K_INPUT_TOKENS = "0"
 # COST_PER_1K_OUTPUT_TOKENS = "0"
+# EXCHANGE_FEE = "1.005"  # 0.5 % currency exchange fee 
 
 # password used to log into admin interface
 ADMIN_PASSWORD="CHANGE-THIS"

router/payment/price.py

@@ -9,8 +9,9 @@ logger = get_logger(__name__)
 
 # artifical spread to cover conversion fees
 EXCHANGE_FEE = float(os.environ.get("EXCHANGE_FEE", "1.005"))  # 0.5% default
-
-logger.info("Price module initialized", extra={"exchange_fee": EXCHANGE_FEE})
+UPSTREAM_PROVIDER_FEE = float(
+    os.environ.get("UPSTREAM_PROVIDER_FEE", "1.05")
+)  # 5% default (e.g. openrouter charges 5% margin)
 
 
 async def kraken_btc_usd(client: httpx.AsyncClient) -> float | None:
@@ -98,7 +99,7 @@ async def btc_usd_ask_price() -> float:
                 raise ValueError("Unable to fetch BTC price from any exchange")
 
             max_price = max(valid_prices)
-            final_price = max_price * EXCHANGE_FEE
+            final_price = max_price * EXCHANGE_FEE * UPSTREAM_PROVIDER_FEE
 
             return final_price