/**
 * @db4/core - Constants and Limits
 *
 * Defines system-wide constants, limits, thresholds, and default values.
 *
 * @packageDocumentation
 */
/**
 * Maximum document size in bytes (100KB).
 * Documents larger than this will be rejected.
 */
export declare const MAX_DOCUMENT_SIZE: number;
/**
 * Maximum batch size in bytes (900KB).
 * Batches larger than this will be split.
 */
export declare const MAX_BATCH_SIZE: number;
/**
 * Maximum result size in bytes (10MB).
 * Query results larger than this will trigger streaming mode.
 */
export declare const MAX_RESULT_SIZE: number;
/**
 * Maximum query memory budget in bytes (50MB).
 * Queries exceeding this will be aborted.
 */
export declare const MAX_QUERY_MEMORY: number;
/**
 * Maximum CDC log size in bytes before compaction (100MB).
 */
export declare const MAX_CDC_LOG_SIZE: number;
/**
 * Maximum index size in bytes (1GB).
 */
export declare const MAX_INDEX_SIZE: number;
/**
 * Durable Object transient allocation limit (128MB).
 */
export declare const DO_TRANSIENT_LIMIT: number;
/**
 * Documents per batch tier options.
 */
export declare const BATCH_SIZE_TIER: {
    readonly SMALL: 64;
    readonly MEDIUM: 128;
    readonly LARGE: 256;
};
/**
 * Default documents per batch.
 */
export declare const DEFAULT_BATCH_SIZE: 128;
/**
 * Maximum nested depth for documents.
 */
export declare const MAX_NESTED_DEPTH = 100;
/**
 * Maximum field name length.
 */
export declare const MAX_FIELD_NAME_LENGTH = 256;
/**
 * Maximum string field value length.
 */
export declare const MAX_STRING_VALUE_LENGTH: number;
/**
 * Maximum array length in a document.
 */
export declare const MAX_ARRAY_LENGTH = 10000;
/**
 * Maximum number of fields in a document.
 */
export declare const MAX_DOCUMENT_FIELDS = 1000;
/**
 * Default query result limit.
 */
export declare const DEFAULT_QUERY_LIMIT = 100;
/**
 * Maximum query result limit.
 */
export declare const MAX_QUERY_LIMIT = 10000;
/**
 * Default query timeout in milliseconds (30 seconds).
 */
export declare const DEFAULT_QUERY_TIMEOUT: number;
/**
 * Maximum query timeout in milliseconds (5 minutes).
 */
export declare const MAX_QUERY_TIMEOUT: number;
/**
 * Threshold for auto-switching to streaming mode (document count).
 */
export declare const STREAMING_THRESHOLD = 1000;
/**
 * Maximum filters in a single query.
 */
export declare const MAX_QUERY_FILTERS = 50;
/**
 * Maximum sort fields in a single query.
 */
export declare const MAX_SORT_FIELDS = 10;
/**
 * Maximum projection fields in a single query.
 */
export declare const MAX_PROJECTION_FIELDS = 100;
/**
 * Default transaction timeout in milliseconds (30 seconds).
 */
export declare const DEFAULT_TRANSACTION_TIMEOUT: number;
/**
 * Maximum transaction timeout in milliseconds (2 minutes).
 */
export declare const MAX_TRANSACTION_TIMEOUT: number;
/**
 * Maximum concurrent transactions per shard.
 */
export declare const MAX_CONCURRENT_TRANSACTIONS = 100;
/**
 * Maximum documents in a transaction read set.
 */
export declare const MAX_TRANSACTION_READ_SET = 10000;
/**
 * Maximum documents in a transaction write set.
 */
export declare const MAX_TRANSACTION_WRITE_SET = 1000;
/**
 * Default CDC batch size (entries per batch).
 */
export declare const DEFAULT_CDC_BATCH_SIZE = 100;
/**
 * Maximum CDC batch size.
 */
export declare const MAX_CDC_BATCH_SIZE = 1000;
/**
 * Default CDC flush interval in milliseconds (5 seconds).
 */
export declare const DEFAULT_CDC_FLUSH_INTERVAL: number;
/**
 * CDC retention period in milliseconds (7 days).
 */
export declare const DEFAULT_CDC_RETENTION_PERIOD: number;
/**
 * Maximum CDC log entries before compaction.
 */
export declare const MAX_CDC_LOG_ENTRIES = 1000000;
/**
 * Maximum indexes per collection.
 */
export declare const MAX_INDEXES_PER_COLLECTION = 20;
/**
 * Maximum fields in a compound index.
 */
export declare const MAX_COMPOUND_INDEX_FIELDS = 10;
/**
 * Maximum index name length.
 */
export declare const MAX_INDEX_NAME_LENGTH = 64;
/**
 * Maximum shards per database.
 */
export declare const MAX_SHARDS = 1000;
/**
 * Default number of shards.
 */
export declare const DEFAULT_SHARD_COUNT = 1;
/**
 * Maximum shard key length.
 */
export declare const MAX_SHARD_KEY_LENGTH = 256;
/**
 * Default retry count for transient errors.
 */
export declare const DEFAULT_RETRY_COUNT = 3;
/**
 * Default retry delay in milliseconds.
 */
export declare const DEFAULT_RETRY_DELAY = 100;
/**
 * Maximum retry delay in milliseconds.
 */
export declare const MAX_RETRY_DELAY: number;
/**
 * Retry backoff multiplier.
 */
export declare const RETRY_BACKOFF_MULTIPLIER = 2;
/**
 * Jitter factor for retry delays (0-1).
 */
export declare const RETRY_JITTER_FACTOR = 0.1;
/**
 * Default cursor TTL in milliseconds (1 hour).
 */
export declare const DEFAULT_CURSOR_TTL: number;
/**
 * Maximum cursor TTL in milliseconds (24 hours).
 */
export declare const MAX_CURSOR_TTL: number;
/**
 * Cursor version for schema migration.
 */
export declare const CURSOR_VERSION = 1;
/**
 * Default telemetry buffer size.
 */
export declare const DEFAULT_TELEMETRY_BUFFER_SIZE = 100;
/**
 * Default telemetry flush interval in milliseconds.
 */
export declare const DEFAULT_TELEMETRY_FLUSH_INTERVAL: number;
/**
 * Default query sampling rate.
 */
export declare const DEFAULT_QUERY_SAMPLING_RATE = 1;
/**
 * Default performance sampling rate.
 */
export declare const DEFAULT_PERFORMANCE_SAMPLING_RATE = 0.1;
/**
 * Maximum log entry size in bytes.
 */
export declare const MAX_LOG_ENTRY_SIZE: number;
/**
 * Default log batch size.
 */
export declare const DEFAULT_LOG_BATCH_SIZE = 50;
/**
 * Default log batch interval in milliseconds.
 */
export declare const DEFAULT_LOG_BATCH_INTERVAL = 1000;
/**
 * Reserved collection names that cannot be used.
 */
export declare const RESERVED_COLLECTION_NAMES: readonly ["_system", "_meta", "_cdc", "_indexes", "_transactions", "_stats", "_config", "_schema"];
/**
 * Internal collection name prefix.
 */
export declare const INTERNAL_COLLECTION_PREFIX = "_";
/**
 * Maximum collection name length.
 */
export declare const MAX_COLLECTION_NAME_LENGTH = 128;
/**
 * Reserved field names that have special meaning.
 */
export declare const RESERVED_FIELD_NAMES: readonly ["id", "_meta", "_id", "_rev", "_deleted"];
/**
 * Internal field name prefix.
 */
export declare const INTERNAL_FIELD_PREFIX = "_";
/**
 * Default feature flag values.
 */
export declare const DEFAULT_FEATURE_FLAGS: {
    /** Enable CDC logging */
    readonly enableCDC: true;
    /** Enable schemaless mode */
    readonly enableSchemaless: true;
    /** Enable query caching */
    readonly enableQueryCache: false;
    /** Enable compression */
    readonly enableCompression: false;
    /** Enable telemetry */
    readonly enableTelemetry: true;
    /** Enable structured logging */
    readonly enableStructuredLogging: true;
    /** Enable cursor pagination */
    readonly enableCursorPagination: true;
    /** Enable transactions */
    readonly enableTransactions: true;
    /** Enable streaming queries */
    readonly enableStreamingQueries: true;
};
/**
 * Feature flag type.
 */
export type FeatureFlags = typeof DEFAULT_FEATURE_FLAGS;
/**
 * Default HTTP request timeout in milliseconds.
 */
export declare const DEFAULT_HTTP_TIMEOUT: number;
/**
 * Maximum HTTP request body size in bytes.
 */
export declare const MAX_HTTP_BODY_SIZE: number;
/**
 * Maximum concurrent HTTP requests.
 */
export declare const MAX_CONCURRENT_REQUESTS = 100;
/**
 * Package version.
 */
export declare const VERSION = "0.1.0-rc.1";
/**
 * Minimum supported version for compatibility.
 */
export declare const MIN_COMPATIBLE_VERSION = "0.1.0";
/**
 * Schema version for data format.
 */
export declare const SCHEMA_VERSION = 1;
/**
 * Check if a collection name is reserved.
 */
export declare function isReservedCollectionName(name: string): boolean;
/**
 * Check if a field name is reserved.
 */
export declare function isReservedFieldName(name: string): boolean;
/**
 * Check if a collection name is internal (starts with underscore).
 */
export declare function isInternalCollection(name: string): boolean;
/**
 * Check if a field name is internal (starts with underscore).
 */
export declare function isInternalField(name: string): boolean;
/**
 * Validates that a document size is within limits.
 */
export declare function validateDocumentSize(sizeBytes: number): {
    valid: boolean;
    error?: string;
};
/**
 * Validates that a collection name is valid.
 */
export declare function validateCollectionName(name: string): {
    valid: boolean;
    error?: string;
};
/**
 * Validates that a field name is valid.
 */
export declare function validateFieldName(name: string): {
    valid: boolean;
    error?: string;
};
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