fix(block number): link to the correct page in etherscan for optimism block number links

src/utils/getExplorerLink.ts

@@ -62,6 +62,9 @@ export function getExplorerLink(chainId: number, data: string, type: ExplorerDat
       return `${prefix}/token/${data}`
 
     case ExplorerDataType.BLOCK:
+      if (chainId === SupportedChainId.OPTIMISM || chainId === SupportedChainId.OPTIMISTIC_KOVAN) {
+        return `${prefix}/tx/${data}`
+      }
       return `${prefix}/block/${data}`
 
     case ExplorerDataType.ADDRESS:

src/utils/getLibrary.ts

 import { Web3Provider } from '@ethersproject/providers'
+import ms from 'ms.macro'
 import { SupportedChainId } from '../constants/chains'
 
 const NETWORK_POLLING_INTERVALS: { [chainId: number]: number } = {
-  [SupportedChainId.ARBITRUM_ONE]: 1_000,
-  [SupportedChainId.ARBITRUM_RINKEBY]: 1_000,
-  [SupportedChainId.OPTIMISM]: 1_000,
-  [SupportedChainId.OPTIMISTIC_KOVAN]: 1_000,
+  [SupportedChainId.ARBITRUM_ONE]: ms`1s`,
+  [SupportedChainId.ARBITRUM_RINKEBY]: ms`1s`,
+  [SupportedChainId.OPTIMISM]: ms`1s`,
+  [SupportedChainId.OPTIMISTIC_KOVAN]: ms`1s`,
 }
 
 export default function getLibrary(provider: any): Web3Provider {