eth/backend.go
func (b *backendInstance) FilterLogs(ctx context.Context,
	q ethereum.FilterQuery) ([]types.Log, error) {
	return b.conn.ethClient().FilterLogs(ctx, q)
}
func (b *backendInstance) FilterLogs(ctx context.Context,
	q ethereum.FilterQuery) ([]types.Log, error) {
	return b.conn.ethClient().FilterLogs(ctx, q)
}
// FilterLogs executes a Ethereum filter query.