import type { JsonObject } from 'type-fest';
declare const VALID_SEVERITIES: readonly ["fatal", "error", "warning", "info", "debug"];
type SerializedSeverity = (typeof VALID_SEVERITIES)[number];
/**
 * assert that a value has the minimum serialized Xception shape
 * @param value the candidate serialized payload
 */
export declare function assertSerializedError(value: unknown): asserts value is JsonObject & {
    message: string;
};
/**
 * determine whether a value can be treated as a JSON object
 * @param value the value to inspect
 * @returns whether the value is a non-null object and not an array
 */
export declare function isJsonObject(value: unknown): value is JsonObject;
/**
 * extract an optional string field from serialized input
 * @param value the field value to normalize
 * @returns the string value when present
 */
export declare function readOptionalString(value: unknown): string | undefined;
/**
 * normalize the serialized metadata payload
 * @param value the serialized meta field
 * @returns a plain object or an empty object fallback
 */
export declare function readMeta(value: unknown): Record<string, unknown>;
/**
 * normalize the serialized tag list
 * @param value the serialized tags field
 * @returns the string tags preserved from the payload
 */
export declare function readTags(value: unknown): string[];
/**
 * normalize the serialized severity field
 * @param value the serialized severity value
 * @returns a valid severity or the default error severity
 */
export declare function readSeverity(value: unknown): SerializedSeverity;
/**
 * normalize the serialized code field
 * @param value the serialized code value
 * @returns the machine-readable code when it is string or number
 */
export declare function readCode(value: unknown): number | string | undefined;
/**
 * clamp the configured cause depth to a safe integer value
 * @param value the caller-supplied max depth
 * @returns the safe max depth used during recursive deserialization
 */
export declare function normalizeMaxDepth(value: number | undefined): number;
/**
 * determine whether a value is one of the supported severities
 * @param value the candidate severity value
 * @returns whether the value is a valid serialized severity member
 */
export declare function isSeverity(value: unknown): value is SerializedSeverity;
export {};
//# sourceMappingURL=fromJson.d.ts.map