Make sure the user has a valid address before doing the staking (#324)

We should make sure that the user has a connected account with a
supported address through tBTC before entering the staking flow.

dapp/src/components/TransactionModal/ModalContentWrapper/index.tsx

@@ -8,6 +8,7 @@ import {
 } from "#/hooks"
 import { ConnectBTCAccount, ConnectETHAccount } from "#/assets/icons"
 import { ActionFlowType, PROCESS_STATUSES } from "#/types"
+import { isSupportedBTCAddressType } from "#/utils"
 import ActionFormModal from "./ActionFormModal"
 import MissingAccountModal from "./MissingAccountModal"
 import ResumeModal from "./ResumeModal"
@@ -27,7 +28,7 @@ export default function ModalContentWrapper({
   const { type, status, onClose, onResume } = useModalFlowContext()
   const { tokenAmount } = useTransactionContext()
 
-  if (!btcAccount)
+  if (!btcAccount || !isSupportedBTCAddressType(btcAccount.address))
     return (
       <MissingAccountModal
         currency="bitcoin"