final cleanup, add qn endpoints

Author: Zlerp

README.md

@@ -6,7 +6,7 @@
 
 Ruby gem for generating signed payment HTTP headers and links using the [x402 protocol](https://www.x402.org/).
 
-Supports USDC and other token payments on Base, Avalanche, Solana, and other EVM networks.
+Supports USDC and other token payments on Base, Avalanche, Solana, and other EVM networks with EIP-712 signing.
 
 ## Installation
 
@@ -121,7 +121,7 @@ X402::Payments.configure do |config|
   )
 
   # Set the RPC URL for the custom chain
-  config.rpc_urls["polygon-amoy"] = "https://rpc-amoy.polygon.technology"
+  config.rpc_urls["polygon-amoy"] = "https://bitter-attentive-pool.matic-amoy.quiknode.pro"
 
   config.chain = "polygon-amoy"
   config.currency = "USDC"
@@ -131,7 +131,7 @@ end
 You can also set RPC URLs via environment variables using the pattern `X402_<CHAIN>_RPC_URL`:
 
 ```bash
-export X402_POLYGON_AMOY_RPC_URL="https://rpc-amoy.polygon.technology"
+export X402_POLYGON_AMOY_RPC_URL="https://bitter-attentive-pool.matic-amoy.quiknode.pro"
 ```
 
 #### Register a Custom Token on a Built-in Chain

examples/.env.example

@@ -47,5 +47,5 @@ X402_SOLANA_FEE_PAYER=CKPKJWNdJEqa81x7CkZ14BVPiY6y16Sxs7owznqtWYp5
 # X402_SOLANA_DEVNET_RPC_URL=https://your-solana-devnet-rpc.com
 
 # Custom chains (example)
-# X402_POLYGON_AMOY_RPC_URL=https://rpc-amoy.polygon.technology
-# X402_POLYGON_RPC_URL=https://polygon-rpc.com
+# X402_POLYGON_AMOY_RPC_URL=https://your-rpc-amoy-rpc.com
+# X402_POLYGON_RPC_URL=https://your-polygon-rpc.com

examples/generate_payment.rb

@@ -55,14 +55,9 @@
   "polygon-amoy" => {
     chain_id: 80002,
     usdc_address: "0x41E94Eb019C0762f9Bfcf9Fb1E58725BfB0e7582",
-    usdc_name: "USDC",
-    usdc_version: "2"
-  },
-  "polygon" => {
-    chain_id: 137,
-    usdc_address: "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
-    usdc_name: "USD Coin",
-    usdc_version: "2"
+    usdc_name: "USDC", # Token name for EIP-712 domain (must match contract's name())
+    usdc_version: "2",
+    rpc_url: "https://bitter-attentive-pool.matic-amoy.quiknode.pro"
   }
 }.freeze
 
@@ -88,6 +83,7 @@
       name: custom[:usdc_name],
       version: custom[:usdc_version]
     )
+    config.rpc_urls[CHAIN] = custom[:rpc_url] # Register the RPC URL for the custom chain
   end
 
   config.chain = CHAIN

lib/x402/payments/chains.rb

@@ -37,7 +37,7 @@ module Payments
       },
       "solana" => {
         chain_id: 101,
-        rpc_url: "https://alien-burned-energy.solana-mainnet.quiknode.pro/",
+        rpc_url: "https://alien-burned-energy.solana-mainnet.quiknode.pro",
         usdc_address: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
         explorer_url: "https://explorer.solana.com",
         fee_payer: "CKPKJWNdJEqa81x7CkZ14BVPiY6y16Sxs7owznqtWYp5"