/**
 * Token definition for Tinybird
 * Define reusable static tokens as TypeScript with full type safety
 */
declare const TOKEN_BRAND: unique symbol;
/**
 * Token scope for datasources
 */
export type DatasourceTokenScope = "READ" | "APPEND";
/**
 * Token scope for pipes (READ only)
 */
export type PipeTokenScope = "READ";
/**
 * A token definition
 */
export interface TokenDefinition {
    readonly [TOKEN_BRAND]: true;
    /** Token name */
    readonly _name: string;
    /** Type marker for inference */
    readonly _type: "token";
}
/**
 * Define a static token
 *
 * @param name - The token name (must be valid identifier)
 * @returns A token definition that can be referenced in datasources and pipes
 *
 * @example
 * ```ts
 * import { defineToken } from '@tinybirdco/sdk';
 *
 * export const appToken = defineToken('app_read');
 *
 * // Use in datasource
 * const events = defineDatasource('events', {
 *   schema: { id: t.string() },
 *   tokens: [{ token: appToken, scope: 'READ' }],
 * });
 * ```
 */
export declare function defineToken(name: string): TokenDefinition;
/**
 * Check if a value is a token definition
 */
export declare function isTokenDefinition(value: unknown): value is TokenDefinition;
export {};
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