feat(wallet)_: add new API to restart the wallet reload timer

- Added `restartWalletReloadTimer` method in `api.go` to expose an API for restarting the wallet reload timer.
- Implemented `Restart` method in `reader.go` to stop and start the wallet reader.
- Updated reader_test.go to comply with minimum test coverage threshold

services/wallet/api.go

@@ -873,3 +873,7 @@ func (api *API) SignTypedDataV4(typedJson string, address string, password strin
 	}
 	return types.HexBytes(sig), err
 }
+
+func (api *API) RestartWalletReloadTimer(ctx context.Context) error {
+	return api.s.reader.Restart()
+}

services/wallet/reader.go

@@ -143,6 +143,11 @@ func (r *Reader) Stop() {
 	r.lastWalletTokenUpdateTimestamp = sync.Map{}
 }
 
+func (r *Reader) Restart() error {
+	r.Stop()
+	return r.Start()
+}
+
 func (r *Reader) triggerWalletReload() {
 	r.cancelDelayedWalletReload()
 

services/wallet/reader_test.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/event"
 	"github.com/status-im/status-go/rpc/chain"
 	mock_client "github.com/status-im/status-go/rpc/chain/mock/client"
 	"github.com/status-im/status-go/services/wallet/testutils"
@@ -165,8 +166,9 @@ func setupReader(t *testing.T) (*Reader, *mock_token.MockManagerInterface, *mock
 	mockCtrl := gomock.NewController(t)
 	mockTokenManager := mock_token.NewMockManagerInterface(mockCtrl)
 	tokenBalanceStorage := mock_balance_persistence.NewMockTokenBalancesStorage(mockCtrl)
+	eventsFeed := &event.Feed{}
 
-	return NewReader(mockTokenManager, nil, tokenBalanceStorage, nil), mockTokenManager, tokenBalanceStorage, mockCtrl
+	return NewReader(mockTokenManager, nil, tokenBalanceStorage, eventsFeed), mockTokenManager, tokenBalanceStorage, mockCtrl
 }
 
 func TestGetCachedWalletTokensWithoutMarketData(t *testing.T) {
@@ -1023,3 +1025,18 @@ func TestFetchBalances(t *testing.T) {
 
 	require.True(t, reader.isBalanceCacheValid(addresses))
 }
+
+func TestReaderRestart(t *testing.T) {
+	reader, _, _, mockCtrl := setupReader(t)
+	defer mockCtrl.Finish()
+
+	err := reader.Start()
+	require.NoError(t, err)
+	require.NotNil(t, reader.walletEventsWatcher)
+	previousWalletEventsWatcher := reader.walletEventsWatcher
+
+	err = reader.Restart()
+	require.NoError(t, err)
+	require.NotNil(t, reader.walletEventsWatcher)
+	require.NotEqual(t, previousWalletEventsWatcher, reader.walletEventsWatcher)
+}