diff --git a/hardhat.config.ts b/hardhat.config.ts
index d518905a..3db6b821 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -3,7 +3,7 @@ import fs from 'fs';
 import { HardhatUserConfig } from 'hardhat/types';
 // @ts-ignore
 import { accounts } from './test-wallets.js';
-import { eEthereumNetwork, iParamsPerNetwork } from './helpers/types';
+import { eEthereumNetwork, ePolygonNetwork, eXDaiNetwork } from './helpers/types';
 import { BUIDLEREVM_CHAINID, COVERAGE_CHAINID } from './helpers/buidler-constants';
 import { NETWORKS_RPC_URL, NETWORKS_DEFAULT_GAS } from './helper-hardhat-config';
  
@@ -41,7 +41,7 @@ if (!SKIP_LOAD) {
 
 require(`${path.join(__dirname, 'tasks/misc')}/set-bre.ts`);
 
-const getCommonNetworkConfig = (networkName: eEthereumNetwork, networkId: number) => ({
+const getCommonNetworkConfig = (networkName: eEthereumNetwork | ePolygonNetwork | eXDaiNetwork, networkId: number) => ({
   url: NETWORKS_RPC_URL[networkName],
   hardfork: HARDFORK,
   blockGasLimit: DEFAULT_BLOCK_GAS_LIMIT,
@@ -95,8 +95,9 @@ const buidlerConfig: HardhatUserConfig = {
     ropsten: getCommonNetworkConfig(eEthereumNetwork.ropsten, 3),
     main: getCommonNetworkConfig(eEthereumNetwork.main, 1),
     tenderlyMain: getCommonNetworkConfig(eEthereumNetwork.main, 1),
-    matic: getCommonNetworkConfig(eEthereumNetwork.matic, 137),
-    mumbai: getCommonNetworkConfig(eEthereumNetwork.mumbai, 80001),
+    matic: getCommonNetworkConfig(ePolygonNetwork.matic, 137),
+    mumbai: getCommonNetworkConfig(ePolygonNetwork.mumbai, 80001),
+    xdai: getCommonNetworkConfig(eXDaiNetwork.xdai, 100),
     hardhat: {
       hardfork: 'istanbul',
       blockGasLimit: DEFAULT_BLOCK_GAS_LIMIT,
diff --git a/helper-hardhat-config.ts b/helper-hardhat-config.ts
index 159418e9..c25f7b9f 100644
--- a/helper-hardhat-config.ts
+++ b/helper-hardhat-config.ts
@@ -1,5 +1,5 @@
 // @ts-ignore
-import { eEthereumNetwork, iParamsPerNetwork } from './helpers/types';
+import { eEthereumNetwork, ePolygonNetwork, eXDaiNetwork, iParamsPerNetwork } from './helpers/types';
 
 require('dotenv').config();
 
@@ -24,9 +24,9 @@ export const NETWORKS_RPC_URL: iParamsPerNetwork<string> = {
   [eEthereumNetwork.tenderlyMain]: ALCHEMY_KEY
     ? `https://eth-mainnet.alchemyapi.io/v2/${ALCHEMY_KEY}`
     : `https://mainnet.infura.io/v3/${INFURA_KEY}`,
-  [eEthereumNetwork.mumbai]: 'https://rpc-mumbai.maticvigil.com',
-  [eEthereumNetwork.matic]: 'https://rpc-mainnet.matic.network',
-  [eEthereumNetwork.xdai]: 'https://rpc.xdaichain.com/',
+  [ePolygonNetwork.mumbai]: 'https://rpc-mumbai.maticvigil.com',
+  [ePolygonNetwork.matic]: 'https://rpc-mainnet.matic.network',
+  [eXDaiNetwork.xdai]: 'https://rpc.xdaichain.com/',
 }
 
 export const NETWORKS_DEFAULT_GAS: iParamsPerNetwork<number> = {
@@ -37,7 +37,7 @@ export const NETWORKS_DEFAULT_GAS: iParamsPerNetwork<number> = {
   [eEthereumNetwork.hardhat]: 65 * GWEI ,
   [eEthereumNetwork.buidlerevm]: 65 * GWEI ,
   [eEthereumNetwork.tenderlyMain]: 65 * GWEI ,
-  [eEthereumNetwork.mumbai]: 1 * GWEI ,
-  [eEthereumNetwork.matic]: 2 * GWEI ,
-  [eEthereumNetwork.xdai]: 1 * GWEI,
+  [ePolygonNetwork.mumbai]: 1 * GWEI ,
+  [ePolygonNetwork.matic]: 2 * GWEI ,
+  [eXDaiNetwork.xdai]: 1 * GWEI,
 }
\ No newline at end of file