chore(statics): add megaeth mainnet config

TICKET: WIN-8334

Author: nvrakesh06

modules/bitgo/test/v2/unit/keychains.ts

@@ -106,6 +106,7 @@ describe('V2 Keychains', function () {
         n.asset !== UnderlyingAsset.OKB &&
         n.asset !== UnderlyingAsset.MORPH &&
         n.asset !== UnderlyingAsset.DOGEOS &&
+        n.asset !== UnderlyingAsset.MEGAETH &&
         coinFamilyValues.includes(n.name)
     );
 

modules/statics/src/networks.ts

@@ -2121,8 +2121,8 @@ class MegaETH extends Mainnet implements EthereumNetwork {
   family = CoinFamily.MEGAETH;
   explorerUrl = 'https://www.megaexplorer.xyz/tx/';
   accountExplorerUrl = 'https://www.megaexplorer.xyz/address/';
-  chainId = 6342;
-  nativeCoinOperationHashPrefix = '6342';
+  chainId = 4326;
+  nativeCoinOperationHashPrefix = '4326';
 }
 
 class MegaETHTestnet extends Testnet implements EthereumNetwork {