import { type Address, type Hex, type PublicClient } from "viem";
import { type BuildQueryFn } from "../../utils/buildQuery.js";
import { type EulerPlugin } from "../types.js";
export type PythUpdateBundle = {
    feedIds: Hex[];
    publishTimes: number[];
    updates: Hex[];
};
/**
 * Adapter for the Pyth plugin. Follows the SDK's injectable query pattern:
 * all external calls are `query*` arrow-function properties, wrapped by `applyBuildQuery`.
 */
export declare class PythPluginAdapter {
    private hermesUrl;
    private fetchFn;
    private inFlightUpdateBundles;
    constructor(hermesUrl: string, buildQuery?: BuildQueryFn, fetchFn?: typeof fetch);
    /**
     * Fetch latest price update data from Pyth Hermes API.
     * Concurrent calls coalesce only when their normalized feed sets are
     * identical.
     */
    queryPythUpdateBundle: (feedIds: Hex[]) => Promise<PythUpdateBundle>;
    queryPythUpdateData: (feedIds: Hex[]) => Promise<Hex[]>;
    getQueryKeyPythUpdateBundle(feedIds: Hex[]): string | null;
    getQueryKeyPythUpdateData(feedIds: Hex[]): string | null;
    private fetchPythUpdateBundle;
    /**
     * Query the on-chain Pyth contract for the fee required to update given price data.
     */
    queryPythUpdateFee: (provider: PublicClient, pythAddress: Address, updateData: Hex[]) => Promise<bigint>;
    getQueryKeyPythUpdateFee(provider: PublicClient, pythAddress: Address, updateData: Hex[]): string | null;
    setQueryPythUpdateData(fn: typeof this.queryPythUpdateData): void;
    setQueryPythUpdateBundle(fn: typeof this.queryPythUpdateBundle): void;
    setQueryPythUpdateFee(fn: typeof this.queryPythUpdateFee): void;
}
export interface PythPluginConfig {
    hermesUrl?: string;
    buildQuery?: BuildQueryFn;
    /** Additional trusted Pyth contract addresses by chain ID. Official addresses are allowed by default. */
    pythAddresses?: Record<number, Address | readonly Address[]>;
    /** Maximum native-token fee accepted for one Pyth update batch. Defaults to 0.01 native token. */
    maxUpdateFee?: bigint;
    /** Override fetch used to call the Hermes endpoint. Apps that proxy Hermes through their own backend (e.g. to satisfy CSP) pass a fetcher that rewrites the request URL. */
    fetchFn?: typeof fetch;
}
export declare function createPythPlugin(config?: PythPluginConfig): EulerPlugin;
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