/**
 * The shape of the validate fn
 */
export type ValidateFn<T extends unknown> = (key: string, value?: string) => T;
/**
 * A standard set of options accepted by the schema validation
 * functions
 */
export type SchemaFnOptions = {
    message?: string;
};
/**
 * Options accepted by the URL format
 */
export type StringFnUrlOptions = SchemaFnOptions & {
    format: 'url';
    /**
     * Whether the URL must have a valid TLD in their domain.
     * Defaults to `true`.
     */
    tld?: boolean;
    /**
     * Whether the URL must start with a valid protocol.
     * Defaults to `true`.
     */
    protocol?: boolean;
};
/**
 * Options accepted by the string schema function
 */
export type StringFnOptions = (SchemaFnOptions & {
    format?: 'host' | 'email' | 'uuid';
}) | StringFnUrlOptions;