export declare enum HeliusPriorityLevel {
    MIN = "min",
    LOW = "low",
    MEDIUM = "medium",
    HIGH = "high",
    VERY_HIGH = "veryHigh",
    UNSAFE_MAX = "unsafeMax"
}
export type HeliusPriorityFeeLevels = {
    [key in HeliusPriorityLevel]: number;
};
export type HeliusPriorityFeeResponse = {
    jsonrpc: string;
    result: {
        priorityFeeEstimate?: number;
        priorityFeeLevels?: HeliusPriorityFeeLevels;
    };
    id: string;
};
export declare function fetchHeliusPriorityFee(heliusRpcUrl: string, lookbackDistance: number, addresses: string[]): Promise<HeliusPriorityFeeResponse>;