import * as API from '../api/types';
export declare type Match<T, S extends API.APIKey> = T extends API.API<infer U, infer UP, infer M, infer P, infer R> ? S extends "uri" ? U : S extends "uriParams" ? UP : S extends "method" ? M : S extends "param" ? P : S extends "response" ? R : never : never;
export declare function mkHeader(extra?: any): any;
export declare function canvas<T>(props: {
    uri: Match<T, "uri">;
    method: Match<T, "method">;
    uriParams?: Match<T, "uriParams">;
    param: Match<T, "param">;
    extraHeaders?: any;
}): Promise<Match<T, "response">>;