export declare class BallotPool {
    ballots: {
        [author: string]: {
            url: URL;
            index: number;
        };
    };
    private authorizedVoters;
    constructor(authorizedVoters?: string[]);
    addBallot({ url, author }: {
        url: URL;
        author?: string;
    }): boolean;
}
export interface CommitNode {
    sha: string;
    author: string;
    isValid: boolean;
}
export default class BallotPoolGit extends BallotPool {
    private commits;
    constructor(commitTree: CommitNode[], authorizedVoters?: string[]);
    addBallot({ url, commitSha, }: {
        url: URL;
        commitSha: string;
    }): boolean;
}