import type { HistoryPolicy, NormalizedHistoryPolicy, NormalizedPayloadSizePolicy, NormalizedRetentionPolicy, PayloadSizePolicy, RetentionPolicy, WorkflowState, WorkflowStatus, WorkflowTimelineEntry } from '../types.ts';
import type { WorkflowVersionTuple } from '../workflow-version-tuple.ts';
export declare function isSanitizedSearchAttributeValue(value: unknown): value is import('../types.ts').SearchAttributeValue;
export declare function isWorkflowVersionTuple(value: unknown): value is WorkflowVersionTuple;
export declare function isFiniteNumber(value: unknown): value is number;
export declare function isTimelineStep(value: unknown): value is number;
export declare function isWorkflowTimelineEntry(value: unknown): value is WorkflowTimelineEntry;
export declare function normalizeBulkFilterNumber(value: unknown, fieldName: 'limit' | 'offset'): number | undefined;
export declare function isValidDecodedTags(value: unknown): value is string[] | undefined;
export declare function decodeWorkflowState(bytes: Uint8Array): WorkflowState;
export declare function normalizeRetentionDuration(value: import('../types.ts').Duration | undefined, fieldName: string): number | undefined;
/**
 * Validate and normalise a {@link HistoryPolicy} into a
 * {@link NormalizedHistoryPolicy}. Mirrors {@link normalizeRetentionPolicy}'s
 * throw-on-bad-input contract.
 *
 * Both `maxEvents` and `retentionWindow` share the same validation mechanics
 * (they differ in semantics — see {@link HistoryPolicy}):
 * - omitted policy, or omitted/`undefined` field → `null` (disabled).
 * - `0` → `null` (disabled; mirrors `checkpointHistory: 0` meaning "off").
 * - any other value that is not a positive safe integer (negatives, non-integers,
 *   non-finite values, unsafe integers, wrong types) → throws.
 */
export declare function normalizeHistoryPolicy(policy: HistoryPolicy | undefined, context: string): NormalizedHistoryPolicy;
/**
 * Validate and normalise a {@link PayloadSizePolicy} into a
 * {@link NormalizedPayloadSizePolicy}. Mirrors {@link normalizeHistoryPolicy}'s
 * throw-on-bad-input contract.
 *
 * Contract for `maxBytes`:
 * - omitted policy, or omitted/`undefined`/`null` field → `{ maxBytes: null }` (disabled).
 * - `0` → `{ maxBytes: null }` (disabled).
 * - any other value that is not a positive safe integer (negatives, non-integers,
 *   non-finite values, unsafe integers, wrong types) → throws.
 */
export declare function normalizePayloadSizePolicy(policy: PayloadSizePolicy | undefined, context: string): NormalizedPayloadSizePolicy;
export declare function normalizeRetentionPolicy(policy: RetentionPolicy | undefined, context: string): NormalizedRetentionPolicy | null;
export declare function resolveRetentionForStatus(policy: NormalizedRetentionPolicy | null | undefined, status: WorkflowStatus): number | undefined;
export declare function isTerminalWorkflowStatus(status: WorkflowStatus): boolean;
export declare function isPlainObjectRecord(value: unknown): value is Record<string, unknown>;