Add support for BASE blockchain

config/config.json

@@ -443,6 +443,16 @@
                             "rpcEndpoints": ["https://rpc.chiadochain.net"],
                             "operatorFee": 0
                         }
+                    },
+                    "base:84532": {
+                        "enabled": false,
+                        "package": "./blockchain/implementation/base/base-service.js",
+
+                        "config": {
+                            "hubContractAddress": "0x144eDa5cbf8926327cb2cceef168A121F0E4A299",
+                            "rpcEndpoints": ["https://sepolia.base.org"],
+                            "operatorFee": 0
+                        }
                     }
                 }
             },
@@ -617,6 +627,16 @@
                             "rpcEndpoints": ["https://rpc.chiadochain.net"],
                             "operatorFee": 0
                         }
+                    },
+                    "base:84532": {
+                        "enabled": false,
+                        "package": "./blockchain/implementation/base/base-service.js",
+
+                        "config": {
+                            "hubContractAddress": "0x6C861Cb69300C34DfeF674F7C00E734e840C29C0",
+                            "rpcEndpoints": ["https://sepolia.base.org"],
+                            "operatorFee": 0
+                        }
                     }
                 }
             },
@@ -791,6 +811,15 @@
                             "gasPriceOracleLink": "https://api.gnosisscan.io/api?module=proxy&action=eth_gasPrice",
                             "operatorFee": 0
                         }
+                    },
+                    "base:8453": {
+                        "enabled": false,
+                        "package": "./blockchain/implementation/base/base-service.js",
+
+                        "config": {
+                            "hubContractAddress": "",
+                            "operatorFee": 0
+                        }
                     }
                 }
             },

package.json

@@ -1,6 +1,6 @@
 {
     "name": "origintrail_node",
-    "version": "6.4.0",
+    "version": "6.4.1",
     "description": "OTNode V6",
     "main": "index.js",
     "type": "module",

src/constants/constants.js

@@ -724,6 +724,7 @@ export const BLOCK_TIME_MILLIS = {
     HARDHAT: 5_000,
     GNOSIS: 5_000,
     DEFAULT: 12_000,
+    BASE: 2_000,
 };
 
 export const TRANSACTION_CONFIRMATIONS = 1;

src/modules/blockchain/implementation/base/base-service.js

@@ -0,0 +1,25 @@
+import Web3Service from '../web3-service.js';
+import { BLOCK_TIME_MILLIS } from '../../../../constants/constants.js';
+
+class BaseService extends Web3Service {
+    constructor(ctx) {
+        super(ctx);
+
+        this.baseTokenTicker = 'ETH';
+        this.tracTicker = 'TRAC';
+    }
+
+    getBlockTimeMillis() {
+        return BLOCK_TIME_MILLIS.BASE;
+    }
+
+    async getGasPrice() {
+        return this.provider.getGasPrice();
+    }
+
+    async getAgreementScoreFunctionId() {
+        return 2;
+    }
+}
+
+export default BaseService;