import type { Transport } from 'viem';
export declare function http({ apiKey, entitySecret, baseUrl, name, chainId, timeout, pollingInterval, fallbackTransport, }: {
    apiKey: string;
    entitySecret: string;
    baseUrl?: string;
    name?: string;
    chainId: number;
    /**
     * The polling timeout for the transaction (milliseconds).
     * If not provided, there is no timeout.
     */
    timeout?: number;
    /**
     * Interval of polling (milliseconds).
     * Default is 1000 (1 second).
     */
    pollingInterval?: number;
    /**
     * The fallback transport is used when the requested method is not supported by the Circle Wallets provider.
     * By default, it's a http provider that uses the public RPC endpoint.
     * Set to null to disable the fallback behavior.
     */
    fallbackTransport?: Transport | null;
}): import("viem").CustomTransport;