import { Context } from "koa";
import { SimpleInput } from "../controls/simple-input.js";
import { FormDataValue } from "../form-types.js";
import { FieldParseResult, FormField } from "./field.js";
export declare class NumberField<DefaultValue extends number | null = number, Required extends boolean = boolean> extends FormField<Required, number | DefaultValue, SimpleInput> {
    default_value: DefaultValue;
    options: Partial<{
        max: number;
        min: number;
        decimalDigits: number;
    }>;
    constructor(required: Required, default_value: DefaultValue, options?: Partial<{
        max: number;
        min: number;
        decimalDigits: number;
    }>);
    predicate: import("@sealcode/ts-predicates").Predicate<number>;
    isValueValid(_: Context, value: unknown): Promise<{
        valid: boolean;
        message: string;
    }>;
    parse(_: Context, value: FormDataValue): Promise<FieldParseResult<number>>;
    getEmptyValue(): DefaultValue;
    getControl(): SimpleInput;
}