import type { Transport } from "viem";
export type TransportConfig = {
    url: string;
    timeout?: number;
    retryCount?: number;
    retryDelay?: number;
};
export type HttpTransportOptions = Omit<TransportConfig, "url">;
export declare function makeHttpTransport(config: TransportConfig): Transport;
export declare function makeFallbackTransport(urls: readonly string[], options?: HttpTransportOptions): Transport;
export declare function makeChainTransports(chains: {
    chainId: number;
    rpcUrls: readonly string[];
    http?: HttpTransportOptions | undefined;
}[]): Record<number, Transport>;
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