feat: OpenZeppelin x402 mainnet support — update network-config.js

network-config.js

@@ -1,5 +1,8 @@
 // Network configuration. Reads NETWORK from env (default: stellar:testnet).
-// Set NETWORK=stellar:public for mainnet deployments.
+// Set NETWORK=stellar:pubnet for mainnet deployments.
+//
+// Note: x402 uses CAIP-2-style chain IDs which differ from the Stellar SDK's
+// network passphrase concept. Stellar mainnet is "stellar:pubnet" in x402-land.
 import { Networks } from "@stellar/stellar-sdk";
 
 const NETWORKS = {
@@ -9,8 +12,8 @@ const NETWORKS = {
     horizonUrl: "https://horizon-testnet.stellar.org",
     usdcIssuer: "GBBD47IF6LWK7P7MDEVSCWR7DPUWV3NY3DTQEVFL4NAT4AQH3ZLLFLA5",
   },
-  "stellar:public": {
-    network: "stellar:public",
+  "stellar:pubnet": {
+    network: "stellar:pubnet",
     passphrase: Networks.PUBLIC,
     horizonUrl: "https://horizon.stellar.org",
     usdcIssuer: "GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
@@ -20,7 +23,7 @@ const NETWORKS = {
 const selected = process.env.NETWORK || "stellar:testnet";
 if (!NETWORKS[selected]) {
   throw new Error(
-    `Invalid NETWORK="${selected}". Must be "stellar:testnet" or "stellar:public".`,
+    `Invalid NETWORK="${selected}". Must be "stellar:testnet" or "stellar:pubnet".`,
   );
 }
 
@@ -30,3 +33,4 @@ export const HORIZON_URL = NETWORKS[selected].horizonUrl;
 export const USDC_ISSUER = NETWORKS[selected].usdcIssuer;
 export const FACILITATOR_URL =
   process.env.FACILITATOR_URL || "https://www.x402.org/facilitator";
+export const FACILITATOR_API_KEY = process.env.OPENZEPPELIN_API_KEY || null;