/**
 * The interface required by the GossipFilter to perform on-chain validation checks
 * of messages. A simplified interface is required by the GossipFilter. The actual
 * chain client implementation may offer a broader set of feautures. Additionally,
 * an adapter could be constructred to make an chain client conform to that required
 * by the GossipFilter.
 */
export interface IGossipFilterChainClient {
    getBlockHash(height: number): Promise<string>;
    getBlock(hash: string): Promise<HasTxStrings>;
    getUtxo(txId: string, voutIdx: number): Promise<HasScriptPubKey & HasValue>;
    waitForSync(): Promise<boolean>;
}
export declare type HasTxStrings = {
    tx: string[];
};
export declare type HasScriptPubKey = {
    scriptPubKey: HasHex;
};
export declare type HasValue = {
    value: number;
};
export declare type HasHex = {
    hex: string;
};