export type JsonRecord = Record<string, unknown>;
export declare function asRecord(value: unknown): JsonRecord | null;
export declare function asJsonRecord(input: unknown, errorMessage: string): JsonRecord;
export declare function assertKnownKeys(record: JsonRecord, allowedKeys: readonly string[], label: string): void;
export declare function requireTrimmedString(value: unknown, options: {
    fieldPath: string;
    maxLength?: number;
    requiredMessage?: string;
    invalidTypeMessage?: string;
}): string;
export declare function optionalTrimmedString(value: unknown, options: {
    fieldPath: string;
    maxLength?: number;
    invalidTypeMessage?: string;
}): string | undefined;
export declare function requireBoolean(value: unknown, fieldPath: string, errorMessage?: string): boolean;
export declare function requireInteger(value: unknown, fieldPath: string, options?: {
    allowZero?: boolean;
    integerMessage?: string;
}): number;