export declare const MAX_BATCH_ITEMS_READ_COUNT = 100;
export declare const MAX_BATCH_ITEMS_WRITE_COUNT = 25;
/**
 * Checks if a given value is an error that was thrown because DynamoDB conditional
 * write failed to meet its condition.
 * @param err The error to check
 * @returns `true` if the error is DynamoDB conditional check error. \
 * Otherwise, `false`.
 */
export declare function isDynamoDBConditionalCheckFailureError(err: unknown): boolean;
/**
 * Checks if a given value is an error that was thrown because a transaction was cancelled. \
 * Usually because DynamoDB conditional check failure.
 * @param err The error to check
 * @returns `true` if the error is DynamoDB transaction cancelled error. \
 * Otherwise, `false`.
 */
export declare function isDynamoDBTransactionCanceledError(err: unknown): boolean;
export interface ConditionalExpression {
    ConditionExpression: string;
    ExpressionAttributeNames: Record<string, string>;
}
/**
 * Creates a conditional that prevent a record to be put into a DynamoDB table
 * if a record with its partition-key already exist
 * @param pkKey The key that is used as partition key (default = `'pk'`)
 * @param attributeName The name of the attribute as it is being used in the expression,
 * without the `'#'` prefix (default = `'pk'`)
 * @returns An object containing the expression and expression-attribute-names
 * that can be used in DynamoDB put query
 */
export declare function recordDoesNotExistConditionalExpression(pkKey?: string, attributeName?: string): ConditionalExpression;
/**
 * Creates a conditional that prevent a record being updated in a DynamoDB table
 * unless it exists
 * @param pkKey The key that is used as partition key (default = `'pk'`)
 * @param attributeName The name of the attribute as it is being used in the expression,
 * without the `'#'` prefix (default = `'pk'`)
 * @returns An object containing the expression and expression-attribute-names
 * that can be used in DynamoDB put query
 */
export declare function recordExistsConditionalExpression(pkKey?: string, attributeName?: string): ConditionalExpression;
export declare type DynamoDBScalar = boolean | number | string | null;
export interface DynamoDBMap {
    [k: string]: DynamoDBType;
}
export declare type DynamoDBType = DynamoDBMap | DynamoDBScalar | DynamoDBType[];
export declare const isDynamoDBScalar: import("@altostra/type-validations").TypeValidation<DynamoDBScalar>;
export declare const isDynamoDBType: import("@altostra/type-validations").WithRecursionValidation<DynamoDBType>;
export declare const isDynamoDBMap: import("@altostra/type-validations").TypeValidation<Record<string | number, DynamoDBType>>;