V1 cleanup (#192)

* do cleanup

* clean sub modules

* clean pnpm-lock

---------

Co-authored-by: jolestar <host-user@example.com>

Author: jolestar

.gitmodules

@@ -7,16 +7,9 @@
 [submodule "lib/forge-std"]
 	path = lib/forge-std
 	url = https://github.com/foundry-rs/forge-std
-[submodule "deps/x402"]
-	path = deps/x402
-	url = https://github.com/nuwa-protocol/x402.git
-	branch = x402x
 [submodule "contracts/lib/forge-std"]
 	path = contracts/lib/forge-std
 	url = https://github.com/foundry-rs/forge-std.git
 [submodule "contracts/x402x-mint/lib/prb-math"]
 	path = contracts/x402x-mint/lib/prb-math
 	url = https://github.com/PaulRBerg/prb-math.git
-[submodule "deps/x402_upstream_main"]
-	path = deps/x402_upstream_main
-	url = https://github.com/coinbase/x402.git

deps/x402

@@ -48,7 +48,7 @@ interface PaymentRequirements {
 interface PaymentResponse {
   accepts?: PaymentRequirements[];
   error?: string;
-  x402Version?: number; // v2-only: must be 2
+  x402Version: number; // v2-only: must be 2
   extensions?: Record<string, any>;
 }
 

deps/x402_upstream_main

@@ -225,7 +225,7 @@ The facilitator automatically detects the settlement mode based on the presence
 
 **Mainnet Note**: Mainnet networks are automatically supported through the SDK configuration. The facilitator will:
 
-- Auto-load SettlementRouter addresses from `@x402x/core`
+- Auto-load SettlementRouter addresses from `@x402x/extensions`
 - Auto-load RPC URLs from viem chain definitions (or use environment variables if provided)
 - Apply mainnet security policies (only SettlementRouter mode allowed)
 
@@ -1070,7 +1070,7 @@ The facilitator includes production-grade security features:
 BASE_SEPOLIA_SETTLEMENT_ROUTER_ADDRESS=0x32431D4511e061F1133520461B07eC42afF157D6
 X_LAYER_TESTNET_SETTLEMENT_ROUTER_ADDRESS=0x8FbB2f214b3b3907BB733e77fa2cAaC16ddCe82e
 
-# Fallback: Uses addresses from @x402x/core if not specified
+# Fallback: Uses addresses from @x402x/extensions if not specified
 ```
 
 **How it works:**