import type { EtherscanResponse, Transport } from './types.js';
/** Endpoint-specific query parameters supplied by a namespace method. */
export type QueryParams = Record<string, string | number | boolean>;
/** The shared GET request function handed to every namespace. */
export interface GetRequest {
    <T = unknown>(params: QueryParams): Promise<EtherscanResponse<T>>;
}
/** A POST request function (used by the contract-verification endpoints). */
export interface PostRequest {
    <T = unknown>(params: QueryParams): Promise<EtherscanResponse<T>>;
}
/** A GET against an arbitrary path under the base URL (e.g. `/v2/chainlist`). */
export interface RawGet {
    <T = unknown>(path: string): Promise<EtherscanResponse<T>>;
}
export interface RequestConfig {
    baseUrl: string;
    timeout: number;
}
/** True for keys that could pollute a prototype if copied via bracket assignment. */
export declare function isUnsafeKey(key: string): boolean;
/**
 * Builds the shared GET request function. Every namespace passes a plain params
 * object; this injects the universal `apikey` and `chainid`, serialises the
 * query, performs the GET via the supplied transport, and normalises the result.
 */
export declare function createGetRequest(request: Transport, defaults: Record<string, string | number>, config: RequestConfig): GetRequest;
/**
 * Builds a POST request function. Params (plus `apikey`/`chainid`) are sent as a
 * form-encoded body — required by the contract-verification endpoints.
 */
export declare function createPostRequest(request: Transport, defaults: Record<string, string | number>, config: RequestConfig): PostRequest;
/**
 * Builds a raw GET function for endpoints that live outside `/v2/api` and take
 * no apikey/chainid — currently just `/v2/chainlist`.
 */
export declare function createRawGet(request: Transport, config: RequestConfig): RawGet;