/** Network identifiers accepted by the ChainGate RPC proxy. */
export type RpcNetwork = 'bitcoin' | 'bitcointestnet' | 'bitcoincash' | 'litecoin' | 'dogecoin' | 'ethereum' | 'sonic' | 'polygon' | 'arbitrum' | 'avalanche' | 'bnb' | 'base';
/**
 * Provides pre-built JSON-RPC endpoint URLs for every network supported by the
 * ChainGate RPC proxy.
 *
 * Each property returns a fully-qualified URL ready to be used with any
 * JSON-RPC client (ethers, viem, bitcoinjs, etc.) or with
 * {@link ChainGate.networks.evmRpc | `cg.networks.evmRpc()`}. When a
 * ChainGate API key is configured, it is appended automatically.
 *
 * @example
 * ```ts
 * const cg = new ChainGate();
 *
 * // Use directly
 * console.log(cg.rpcUrls.ethereum);
 * // → "https://api.chaingate.dev/rpc/ethereum"
 *
 * // Combine with evmRpc connector
 * const polygon = cg.networks.evmRpc({
 *   rpcUrl: cg.rpcUrls.polygon,
 *   chainId: 137,
 *   name: 'Polygon',
 *   symbol: 'POL',
 * });
 * ```
 */
export declare class RpcUrls {
    readonly bitcoin: string;
    readonly bitcoinTestnet: string;
    readonly bitcoincash: string;
    readonly litecoin: string;
    readonly dogecoin: string;
    readonly ethereum: string;
    readonly sonic: string;
    readonly polygon: string;
    readonly arbitrum: string;
    readonly avalanche: string;
    readonly bnb: string;
    readonly base: string;
    private readonly _apiKey;
    /** @internal */
    constructor(apiKey?: string);
    /**
     * Returns the RPC URL for any supported network by its identifier.
     *
     * @example
     * ```ts
     * const url = cg.rpcUrls.get('polygon');
     * // → "https://api.chaingate.dev/rpc/polygon"
     * ```
     */
    get(network: RpcNetwork): string;
}
/** @internal */
export declare function buildRpcUrl(network: RpcNetwork, apiKey?: string): string;