Finished implementation

.env-example

@@ -22,15 +22,12 @@ export LOCAL_RESTURL=http://localhost:5942/v6
 export PORT=5942
 
 # x402 payments required to access this API?
-# Facilitators https://docs.cdp.coinbase.com/x402/quickstart-for-sellers
 export X402_ENABLED=true
 export SERVER_BASE_ADDRESS=0xd32585CE60815654C50CAf350e18de8096061e63
-export FACILITATOR_URL=https://x402.org/facilitator #Testnet Facilitator
+export X402_PRICE_USDC=0.1
-export X402_PRICE_USDC=0.01
+export x402_NETWORK=base
+export x402_FACILITATOR_URL=http://localhost:4022
 
-# Mainnet facilitator access keys
-export FACILITATOR_KEY_ID=
-export FACILITATOR_SECRET_KEY=
 
 # Basic Authentication required to access this API?
 export USE_BASIC_AUTH=true

.env-facilitator-example

@@ -0,0 +1,4 @@
+export EVM_PRIVATE_KEY=
+export NETWORK=base
+
+node facilitator-server.js

.gitignore

@@ -4,3 +4,4 @@ logs/
 docs/
 coverage/
 start.sh
+start-facilitator.sh

bin/server.js

@@ -16,7 +16,7 @@ import { dirname, join } from 'path'
 import config from '../src/config/index.js'
 import Controllers from '../src/controllers/index.js'
 import wlogger from '../src/adapters/wlogger.js'
-import { buildX402Routes, getX402Settings, getBasicAuthSettings } from '../src/config/x402.js'
+import { buildX402Routes, getX402Settings, getBasicAuthSettings, createAuthHeader } from '../src/config/x402.js'
 import { basicAuthMiddleware } from '../src/middleware/basic-auth.js'
 
 // Load environment variables
@@ -111,10 +111,7 @@ class Server {
         if (facilitatorOptions) {
           facilitatorOptions = {
             url: x402Settings.facilitatorUrl,
-            /** TODO : Auth headers for request mainnet facilitator needed */
+            createAuthHeaders: createAuthHeader
-            createAuthHeaders: async () => {
-              return {}
-            }
           }
         }
 
@@ -122,6 +119,7 @@ class Server {
 
         // Create conditional x402 middleware that bypasses if basic auth is valid
         const conditionalX402Middleware = (req, res, next) => {
+          // req.headers['accept'] = 'application/json';
           // If basic auth is valid, bypass x402
           if (req.locals?.basicAuthValid === true) {
             return next()
@@ -144,10 +142,7 @@ class Server {
         if (facilitatorOptions) {
           facilitatorOptions = {
             url: x402Settings.facilitatorUrl,
-            /** TODO : Auth headers for request mainnet facilitator needed */
+            createAuthHeaders: createAuthHeader
-            createAuthHeaders: async () => {
-              return {}
-            }
           }
         }
 

examples/08-x402-axios-client.js

@@ -1,26 +1,32 @@
 import axios from 'axios'
 import { withPaymentInterceptor } from 'x402-axios'
-import { mnemonicToAccount } from 'viem/accounts'
+import { privateKeyToAccount } from 'viem/accounts'
-import { baseSepolia } from 'viem/chains'
+import { base } from 'viem/chains'
+// import { baseSepolia } from 'viem/chains' // Testnet
+
 import { createWalletClient, http } from 'viem'
 
 const baseURL = 'http://localhost:5942'
 const endpointPath = '/v6/full-node/blockchain/getBlockchainInfo'
-const mnemonic = process.env.MNEMONIC || ''
+const pKey = process.env.PRIVATE_KEY || ''
-
-if (!mnemonic) throw new Error('MNEMONIC env required!')
 
+// PRIVATE_KEY=0x... node examples/08-x402-axios-client.js
+if (!pKey) throw new Error('PRIVATE_KEY env required!')
+console.log('pKey', pKey)
 // Create a wallet client
-const account = mnemonicToAccount(mnemonic)
+const account = privateKeyToAccount(pKey)
 const client = createWalletClient({
   account,
   transport: http(),
-  chain: baseSepolia
+  chain: base
 })
 
 const api = withPaymentInterceptor(
   axios.create({
-    baseURL
+    baseURL,
+    headers: {
+      'Content-Type': 'application/json'
+    }
   }),
   client
 )

package-lock.json

@@ -9,7 +9,10 @@
       "version": "7.0.0",
       "license": "MIT",
       "dependencies": {
+        "@coinbase/cdp-sdk": "1.45.0",
         "@psf/bch-js": "7.1.11",
+        "@x402/core": "2.6.0",
+        "@x402/evm": "2.6.0",
         "axios": "1.7.7",
         "cors": "2.8.5",
         "dotenv": "16.3.1",
@@ -19,8 +22,9 @@
         "slp-token-media": "1.2.10",
         "winston": "3.11.0",
         "winston-daily-rotate-file": "4.7.1",
-        "x402-axios": "^1.1.0",
+        "x402-axios": "1.1.0",
-        "x402-express": "1.1.0"
+        "x402-express": "1.1.0",
+        "x402-fetch": "1.1.0"
       },
       "devDependencies": {
         "apidoc": "1.2.0",
@@ -4182,6 +4186,49 @@
         "node": ">=20"
       }
     },
+    "node_modules/@spruceid/siwe-parser": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@spruceid/siwe-parser/-/siwe-parser-2.1.2.tgz",
+      "integrity": "sha512-d/r3S1LwJyMaRAKQ0awmo9whfXeE88Qt00vRj91q5uv5ATtWIQEGJ67Yr5eSZw5zp1/fZCXZYuEckt8lSkereQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@noble/hashes": "^1.1.2",
+        "apg-js": "^4.3.0",
+        "uri-js": "^4.4.1",
+        "valid-url": "^1.0.9"
+      }
+    },
+    "node_modules/@stablelib/binary": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@stablelib/binary/-/binary-1.0.1.tgz",
+      "integrity": "sha512-ClJWvmL6UBM/wjkvv/7m5VP3GMr9t0osr4yVgLZsLCOz4hGN9gIAFEqnJ0TsSMAN+n840nf2cHZnA5/KFqHC7Q==",
+      "license": "MIT",
+      "dependencies": {
+        "@stablelib/int": "^1.0.1"
+      }
+    },
+    "node_modules/@stablelib/int": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@stablelib/int/-/int-1.0.1.tgz",
+      "integrity": "sha512-byr69X/sDtDiIjIV6m4roLVWnNNlRGzsvxw+agj8CIEazqWGOQp2dTYgQhtyVXV9wpO6WyXRQUzLV/JRNumT2w==",
+      "license": "MIT"
+    },
+    "node_modules/@stablelib/random": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@stablelib/random/-/random-1.0.2.tgz",
+      "integrity": "sha512-rIsE83Xpb7clHPVRlBj8qNe5L8ISQOzjghYQm/dZ7VaM2KHYwMW5adjQjrzTZCchFnNCNhkwtnOBa9HTMJCI8w==",
+      "license": "MIT",
+      "dependencies": {
+        "@stablelib/binary": "^1.0.1",
+        "@stablelib/wipe": "^1.0.1"
+      }
+    },
+    "node_modules/@stablelib/wipe": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@stablelib/wipe/-/wipe-1.0.1.tgz",
+      "integrity": "sha512-WfqfX/eXGiAd3RJe4VU2snh/ZPwtSjLG4ynQ/vYzvghTh7dHFcI1wl+nrkWG6lGhukOxOsUHfv8dUXr58D0ayg==",
+      "license": "MIT"
+    },
     "node_modules/@swc/helpers": {
       "version": "0.5.19",
       "resolved": "https://registry.npmjs.org/@swc/helpers/-/helpers-0.5.19.tgz",
@@ -5253,6 +5300,64 @@
         }
       }
     },
+    "node_modules/@x402/core": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/@x402/core/-/core-2.6.0.tgz",
+      "integrity": "sha512-ISC/JeVss6xlKvor2rp18tJf9K5OQlIDDfZW1VZJQGDI2F4gy+HWxxkFfcQalCsPp4YUlwqh0YOkUxP+LTZWVg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "zod": "^3.24.2"
+      }
+    },
+    "node_modules/@x402/evm": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/@x402/evm/-/evm-2.6.0.tgz",
+      "integrity": "sha512-wPkNHf483gie1Up2sJSvERnW+VIEvMoT1KRXr09wSoSWgelglsJm+ug3gPPXKnT3C6AcmNAKZ12rBnu9Paff7g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@x402/core": "~2.6.0",
+        "@x402/extensions": "~2.6.0",
+        "viem": "^2.39.3",
+        "zod": "^3.24.2"
+      }
+    },
+    "node_modules/@x402/extensions": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/@x402/extensions/-/extensions-2.6.0.tgz",
+      "integrity": "sha512-aLY9xAOOiRLKDN9HT2r9TYUXbD+IsoBces9qPZNVJGO2TBi2rfmbIBc3pcKCtWKn3iTvG2QFr3gpOFdpJRzqww==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@scure/base": "^1.2.6",
+        "@x402/core": "~2.6.0",
+        "ajv": "^8.17.1",
+        "siwe": "^2.3.2",
+        "tweetnacl": "^1.0.3",
+        "viem": "^2.43.5",
+        "zod": "^3.24.2"
+      }
+    },
+    "node_modules/@x402/extensions/node_modules/ajv": {
+      "version": "8.18.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.18.0.tgz",
+      "integrity": "sha512-PlXPeEWMXMZ7sPYOHqmDyCJzcfNrUr3fGNKtezX14ykXOEIvyK81d+qydx89KY5O71FKMPaQ2vBfBFI5NHR63A==",
+      "license": "MIT",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.3",
+        "fast-uri": "^3.0.1",
+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/@x402/extensions/node_modules/json-schema-traverse": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
+      "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug==",
+      "license": "MIT"
+    },
     "node_modules/@xtuc/ieee754": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/@xtuc/ieee754/-/ieee754-1.2.0.tgz",
@@ -5333,6 +5438,13 @@
         "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
       }
     },
+    "node_modules/aes-js": {
+      "version": "4.0.0-beta.5",
+      "resolved": "https://registry.npmjs.org/aes-js/-/aes-js-4.0.0-beta.5.tgz",
+      "integrity": "sha512-G965FqalsNyrPqgEGON7nIx1e/OVENSgiEIzyC63haUMuvNnwIgIjMs52hlTCKhkBny7A2ORNlfY9Zu+jmGk1Q==",
+      "license": "MIT",
+      "peer": true
+    },
     "node_modules/agentkeepalive": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/agentkeepalive/-/agentkeepalive-4.6.0.tgz",
@@ -5438,6 +5550,12 @@
         "node": ">= 8"
       }
     },
+    "node_modules/apg-js": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/apg-js/-/apg-js-4.4.0.tgz",
+      "integrity": "sha512-fefmXFknJmtgtNEXfPwZKYkMFX4Fyeyz+fNF6JWp87biGOPslJbCBVU158zvKRZfHBKnJDy8CMM40oLFGkXT8Q==",
+      "license": "BSD-2-Clause"
+    },
     "node_modules/apidoc": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/apidoc/-/apidoc-1.2.0.tgz",
@@ -9010,6 +9128,114 @@
         "url": "https://paulmillr.com/funding/"
       }
     },
+    "node_modules/ethers": {
+      "version": "6.16.0",
+      "resolved": "https://registry.npmjs.org/ethers/-/ethers-6.16.0.tgz",
+      "integrity": "sha512-U1wulmetNymijEhpSEQ7Ct/P/Jw9/e7R1j5XIbPRydgV2DjLVMsULDlNksq3RQnFgKoLlZf88ijYtWEXcPa07A==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://github.com/sponsors/ethers-io/"
+        },
+        {
+          "type": "individual",
+          "url": "https://www.buymeacoffee.com/ricmoo"
+        }
+      ],
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@adraffy/ens-normalize": "1.10.1",
+        "@noble/curves": "1.2.0",
+        "@noble/hashes": "1.3.2",
+        "@types/node": "22.7.5",
+        "aes-js": "4.0.0-beta.5",
+        "tslib": "2.7.0",
+        "ws": "8.17.1"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
+    "node_modules/ethers/node_modules/@adraffy/ens-normalize": {
+      "version": "1.10.1",
+      "resolved": "https://registry.npmjs.org/@adraffy/ens-normalize/-/ens-normalize-1.10.1.tgz",
+      "integrity": "sha512-96Z2IP3mYmF1Xg2cDm8f1gWGf/HUVedQ3FMifV4kG/PQ4yEP51xDtRAEfhVNt5f/uzpNkZHwWQuUcu6D6K+Ekw==",
+      "license": "MIT",
+      "peer": true
+    },
+    "node_modules/ethers/node_modules/@noble/curves": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@noble/curves/-/curves-1.2.0.tgz",
+      "integrity": "sha512-oYclrNgRaM9SsBUBVbb8M6DTV7ZHRTKugureoYEncY5c65HOmRzvSiTE3y5CYaPYJA/GVkrhXEoF0M3Ya9PMnw==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@noble/hashes": "1.3.2"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
+    "node_modules/ethers/node_modules/@noble/hashes": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.3.2.tgz",
+      "integrity": "sha512-MVC8EAQp7MvEcm30KWENFjgR+Mkmf+D189XJTkFIlwohU5hcBbn1ZkKq7KVTi2Hme3PMGF390DaL52beVrIihQ==",
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">= 16"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
+    "node_modules/ethers/node_modules/@types/node": {
+      "version": "22.7.5",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.7.5.tgz",
+      "integrity": "sha512-jML7s2NAzMWc//QSJ1a3prpk78cOPchGvXJsC3C6R6PSMoooztvRVQEz89gmBTBY1SPMaqo5teB4uNHPdetShQ==",
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "undici-types": "~6.19.2"
+      }
+    },
+    "node_modules/ethers/node_modules/tslib": {
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.7.0.tgz",
+      "integrity": "sha512-gLXCKdN1/j47AiHiOkJN69hJmcbGTHI0ImLmbYLHykhgeN0jVGola9yVjFgzCUklsZQMW55o+dW7IXv3RCXDzA==",
+      "license": "0BSD",
+      "peer": true
+    },
+    "node_modules/ethers/node_modules/undici-types": {
+      "version": "6.19.8",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
+      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
+      "license": "MIT",
+      "peer": true
+    },
+    "node_modules/ethers/node_modules/ws": {
+      "version": "8.17.1",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.17.1.tgz",
+      "integrity": "sha512-6XQFvXTkbfUOZOKKILFG1PDK2NDQs4azKQl26T0YS5CxqWLgXajbPZ+h4gZekJyRqFU8pvnbAbbs/3TgRPy+GQ==",
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": ">=5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/eventemitter2": {
       "version": "6.4.9",
       "resolved": "https://registry.npmjs.org/eventemitter2/-/eventemitter2-6.4.9.tgz",
@@ -13046,7 +13272,6 @@
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
       "integrity": "sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6"
@@ -14173,6 +14398,21 @@
         "url": "https://opencollective.com/sinon"
       }
     },
+    "node_modules/siwe": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/siwe/-/siwe-2.3.2.tgz",
+      "integrity": "sha512-aSf+6+Latyttbj5nMu6GF3doMfv2UYj83hhwZgUF20ky6fTS83uVhkQABdIVnEuS8y1bBdk7p6ltb9SmlhTTlA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@spruceid/siwe-parser": "^2.1.2",
+        "@stablelib/random": "^1.0.1",
+        "uri-js": "^4.4.1",
+        "valid-url": "^1.0.9"
+      },
+      "peerDependencies": {
+        "ethers": "^5.6.8 || ^6.0.8"
+      }
+    },
     "node_modules/slp-mdm": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/slp-mdm/-/slp-mdm-0.0.7.tgz",
@@ -14978,6 +15218,12 @@
       "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
       "license": "0BSD"
     },
+    "node_modules/tweetnacl": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-1.0.3.tgz",
+      "integrity": "sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw==",
+      "license": "Unlicense"
+    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -15377,7 +15623,6 @@
       "version": "4.4.1",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
       "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
-      "dev": true,
       "license": "BSD-2-Clause",
       "dependencies": {
         "punycode": "^2.1.0"
@@ -15467,6 +15712,11 @@
         "node": ">=10.12.0"
       }
     },
+    "node_modules/valid-url": {
+      "version": "1.0.9",
+      "resolved": "https://registry.npmjs.org/valid-url/-/valid-url-1.0.9.tgz",
+      "integrity": "sha512-QQDsV8OnSf5Uc30CKSwG9lnhMPe6exHtTXLRYX8uMwKENy640pU+2BgBL0LRbDh/eYRahNCS7aewCx0wf3NYVA=="
+    },
     "node_modules/valtio": {
       "version": "1.13.2",
       "resolved": "https://registry.npmjs.org/valtio/-/valtio-1.13.2.tgz",
@@ -16939,6 +17189,17 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/x402-fetch": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/x402-fetch/-/x402-fetch-1.1.0.tgz",
+      "integrity": "sha512-cbuUrb258+5n/oZxnvw454+iuhBoFkLptr4WEvlcCi8Hg1utIA6n0O1KqXdBV7GgNmQ8LoUDOiVv9DEyIvnlTw==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "viem": "^2.21.26",
+        "x402": "^1.1.0",
+        "zod": "^3.24.2"
+      }
+    },
     "node_modules/xdg-basedir": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/xdg-basedir/-/xdg-basedir-4.0.0.tgz",

package.json

@@ -15,7 +15,10 @@
   "license": "MIT",
   "description": "REST API proxy to Bitcoin Cash infrastructure",
   "dependencies": {
+    "@coinbase/cdp-sdk": "1.45.0",
     "@psf/bch-js": "7.1.11",
+    "@x402/core": "2.6.0",
+    "@x402/evm": "2.6.0",
     "axios": "1.7.7",
     "cors": "2.8.5",
     "dotenv": "16.3.1",
@@ -26,7 +29,8 @@
     "winston": "3.11.0",
     "winston-daily-rotate-file": "4.7.1",
     "x402-axios": "1.1.0",
-    "x402-express": "1.1.0"
+    "x402-express": "1.1.0",
+    "x402-fetch": "1.1.0"
   },
   "devDependencies": {
     "apidoc": "1.2.0",

src/config/env/common.js

@@ -33,10 +33,11 @@ const priceUSDC = Number.isFinite(parsedPrice) && parsedPrice > 0 ? parsedPrice
 
 const x402Defaults = {
   enabled: normalizeBoolean(process.env.X402_ENABLED, true),
-  facilitatorUrl: process.env.FACILITATOR_URL || 'http://localhost:4345/facilitator',
+  facilitatorUrl: process.env.x402_FACILITATOR_URL || 'http://localhost:4022',
   serverAddress: process.env.SERVER_BASE_ADDRESS || 'bitcoincash:qqsrke9lh257tqen99dkyy2emh4uty0vky9y0z0lsr',
   facilitatorKeyId: process.env.FACILITATOR_KEY_ID || '',
   facilitatorSecretKey: process.env.FACILITATOR_SECRET_KEY || '',
+  network: process.env.x402_NETWORK || 'base-sepolia',
   priceUSDC
 }
 

src/config/x402.js

@@ -1,8 +1,10 @@
 import config from './index.js'
+import { generateJwt } from '@coinbase/cdp-sdk/auth'
 
 const DEFAULT_DESCRIPTION = 'Access to protected psf-bch-api resources'
-const DEFAULT_TIMEOUT_SECONDS = 60
+const DEFAULT_TIMEOUT_SECONDS = 120
-const NETWORK = 'base-sepolia'
+const NETWORK = config.x402.network
+if (!NETWORK) throw new Error('x402_NETWORK env required!')
 
 /**
  * Builds a route configuration map for x402-bch middleware.
@@ -27,7 +29,15 @@ export function buildX402Routes (apiPrefix = '/v6') {
       network: NETWORK,
       config: {
         description: `${DEFAULT_DESCRIPTION} (${config.x402.priceUSDC} USDC)`,
-        maxTimeoutSeconds: DEFAULT_TIMEOUT_SECONDS
+        maxTimeoutSeconds: DEFAULT_TIMEOUT_SECONDS,
+        mimeType: 'application/json',
+        outputSchema: {
+          input: {
+            type: 'http',
+            method: 'GET',
+            discoverable: true
+          }
+        }
       }
     }
   }
@@ -36,7 +46,7 @@ export function buildX402Routes (apiPrefix = '/v6') {
 export function getX402Settings () {
   return {
     enabled: Boolean(config.x402?.enabled),
-    facilitatorUrl: config.x402?.facilitatorUrl, // https://docs.cdp.coinbase.com/x402/quickstart-for-sellers
+    facilitatorUrl: config.x402?.facilitatorUrl, //  https://docs.cdp.coinbase.com/x402/quickstart-for-sellers
     facilitatorKeyId: config.x402?.facilitatorKeyId,
     facilitatorSecretKey: config.x402?.facilitatorSecretKey,
     serverAddress: config.x402?.serverAddress,
@@ -50,3 +60,38 @@ export function getBasicAuthSettings () {
     token: config.basicAuth?.token || ''
   }
 }
+
+/**
+ *
+ * Auth headers for interact with mainnet coin base facilitator endpoints.
+ *
+ */
+// https://docs.cdp.coinbase.com/get-started/authentication/jwt-authentication#javascript-2
+// https://docs.cdp.coinbase.com/api-reference/v2/rest-api/x402-facilitator/verify-a-payment
+export async function createAuthHeader () {
+  // /verify endpoint jwt
+  const verifyToken = await generateJwt({
+    apiKeyId: config.x402?.facilitatorKeyId,
+    apiKeySecret: config.x402?.facilitatorSecretKey,
+    requestMethod: 'POST',
+    requestHost: 'api.cdp.coinbase.com',
+    requestPath: '/platform/v2/x402/verify'
+  })
+  // /settle endpoint jwt
+  const settleToken = await generateJwt({
+    apiKeyId: config.x402?.facilitatorKeyId,
+    apiKeySecret: config.x402?.facilitatorSecretKey,
+    requestMethod: 'POST',
+    requestHost: 'api.cdp.coinbase.com',
+    requestPath: '/platform/v2/x402/settle'
+  })
+
+  return {
+    verify: {
+      Authorization: `Bearer ${verifyToken}`
+    },
+    settle: {
+      Authorization: `Bearer ${settleToken}`
+    }
+  }
+}