chore: add mainnet details for somnia

WIN-5278

TICKET: WIN-5278

Author: rv-bitgo

modules/sdk-core/src/bitgo/environments.ts

@@ -227,7 +227,7 @@ const mainnetBase: EnvironmentTemplate = {
   },
   icpNodeUrl: 'https://ic0.app',
   worldExplorerBaseUrl: 'https://worldscan.org/',
-  somniaExplorerBaseUrl: 'https://shannon-explorer.somnia.network/', //TODO: WIN-5278: change it with mainnet explorer, when its available
+  somniaExplorerBaseUrl: 'https://mainnet.somnia.w3us.site/',
   soneiumExplorerBaseUrl: 'https://soneium-minato.blockscout.com',
   monExplorerBaseUrl: 'https://mainnet-beta.monvision.io',
   stxNodeUrl: 'https://api.hiro.so',

modules/statics/src/networks.ts

@@ -1516,9 +1516,9 @@ class SeiEvmTestnet extends Testnet implements EthereumNetwork {
 class Somnia extends Mainnet implements EthereumNetwork {
   name = 'Somnia';
   family = CoinFamily.STT;
-  explorerUrl = 'https://shannon-explorer.somnia.network/tx/'; //TODO: WIN-5278: change it with mainnet explorer, when its available
-  chainId = 50312; //TODO: WIN-5278: change it with mainnet explorer, when its available
-  nativeCoinOperationHashPrefix = '50312'; //TODO: WIN-5278: change it with mainnet explorer, when its available
+  explorerUrl = 'https://mainnet.somnia.w3us.site/tx/';
+  chainId = 5031;
+  nativeCoinOperationHashPrefix = '5031';
 }
 
 class SomniaTestnet extends Testnet implements EthereumNetwork {