refactor: move project under backend

backend/x402/facilitator/.env

@@ -0,0 +1,19 @@
+PORT=4020
+HOST=https://pay.capay.hao.work
+LOG_LEVEL=info
+
+FACILITATOR_JWT_SECRET=replace-with-strong-secret
+PAYMENT_HMAC_SECRET=replace-with-strong-secret
+EVM_PRIVATE_KEY=da31295a02cb4bf55be60827d72be87c60d7c40efc9b10f6f04dd87e97735da5
+SOLANA_PRIVATE_KEY=fQ6DNzNNJmwiuB9VQSCn5UnwrJktp1ZKsgkmds8NsQowgswv58TGibnJpQkKcLzQtHztizvshfcQVoCJBZrfWsB
+
+# Alchemy Ethereum RPC
+ETHEREUM_RPC_URL=https://eth-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n
+
+# Optional BSC RPC (Alchemy BNB Mainnet)
+BSC_RPC_URL=https://bnb-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n
+
+# Solana RPC (Alchemy)
+SOLANA_RPC_URL=https://solana-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n
+
+REDIS_URL=redis://127.0.0.1:6379

backend/x402/facilitator/config.json

@@ -0,0 +1,49 @@
+{
+  "port": 4020,
+  "host": "0.0.0.0",
+  "chains": {
+    "eip155:1": {
+      "eip1559": true,
+      "signers": ["$EVM_PRIVATE_KEY"],
+      "rpc": [
+        {
+          "http": "https://eth-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n",
+          "rate_limit": 20
+        }
+      ]
+    },
+    "eip155:56": {
+      "eip1559": false,
+      "signers": ["$EVM_PRIVATE_KEY"],
+      "rpc": [
+        {
+          "http": "https://bnb-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n",
+          "rate_limit": 20
+        }
+      ]
+    },
+    "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp": {
+      "signer": "$SOLANA_PRIVATE_KEY",
+      "rpc": "https://solana-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n",
+      "pubsub": "wss://solana-mainnet.g.alchemy.com/v2/P9kZiHB6Q7CLrBlMsUN3n"
+    }
+  },
+  "schemes": [
+    {
+      "id": "v1-eip155-exact",
+      "chains": "eip155:*"
+    },
+    {
+      "id": "v2-eip155-exact",
+      "chains": "eip155:*"
+    },
+    {
+      "id": "v1-solana-exact",
+      "chains": "solana:*"
+    },
+    {
+      "id": "v2-solana-exact",
+      "chains": "solana:*"
+    }
+  ]
+}

backend/x402/facilitator/networks.json

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+{
+  "evm": {
+    "ethereum": {
+      "chainId": 1,
+      "rpcEnv": "ETHEREUM_RPC_URL",
+      "explorer": "https://etherscan.io/tx/"
+    },
+    "bsc": {
+      "chainId": 56,
+      "rpcEnv": "BSC_RPC_URL",
+      "explorer": "https://bscscan.com/tx/"
+    }
+  },
+  "svm": {
+    "solana": {
+      "cluster": "mainnet-beta",
+      "rpcEnv": "SOLANA_RPC_URL",
+      "explorer": "https://solscan.io/tx/"
+    }
+  }
+}

backend/x402/facilitator/tokens.json

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+{
+  "evm": {
+    "ethereum": {
+      "USDC": { "address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", "decimals": 6 },
+      "USDT": { "address": "0xdAC17F958D2ee523a2206206994597C13D831ec7", "decimals": 6 },
+      "ETH": { "native": true, "decimals": 18 }
+    },
+    "bsc": {
+      "USDC": { "address": "0x8ac76a51cc950d9822d68b83fe1ad97b32cd580d", "decimals": 18 },
+      "USDT": { "address": "0x55d398326f99059fF775485246999027B3197955", "decimals": 18 },
+      "BNB": { "native": true, "decimals": 18 }
+    }
+  },
+  "svm": {
+    "solana": {
+      "USDC": { "mint": "EPjFWdd5AufqSSqeM2qE1z3vY2Z9K5xkqkQ3yqC4wR5Z", "decimals": 6 },
+      "USDT": { "mint": "Es9vMFrzaCERzmxEtpmJieE5s3bD4ZjbFj9a2yq6VQ8G", "decimals": 6 },
+      "SOL": { "native": true, "decimals": 9 }
+    }
+  }
+}