import type { GitHubAppConfig } from "./types.js";
export interface Installation {
    id: number;
    account: {
        login: string;
        type: string;
    };
    repositorySelection: string;
}
export interface CreateKeyPROpts {
    owner: string;
    repo: string;
    installationId: number;
    userId: string;
    publicKey: string;
    keyPath: string;
}
export interface CreateKeyPRResult {
    prUrl: string;
    prNumber: number;
    branch: string;
}
/**
 * Client for interacting with GitHub as a GitHub App.
 * Uses @octokit/rest and @octokit/auth-app for authentication.
 */
export declare class GitHubAppClient {
    private readonly config;
    constructor(config: GitHubAppConfig);
    /**
     * Get an installation access token for a specific installation.
     */
    getInstallationToken(installationId: number): Promise<string>;
    /**
     * Create a pull request to add an SSH public key to a repository.
     */
    createKeyPR(opts: CreateKeyPROpts): Promise<CreateKeyPRResult>;
    /**
     * Read a file from a repository.
     */
    readFile(opts: {
        owner: string;
        repo: string;
        installationId: number;
        path: string;
        ref?: string;
    }): Promise<string>;
    /**
     * List all installations for this GitHub App.
     */
    listInstallations(): Promise<Installation[]>;
    /**
     * Extract the key type prefix from an SSH public key string.
     */
    private extractKeyType;
    /**
     * Extract a short fingerprint-like identifier from an SSH public key.
     * Returns the first 16 chars of the base64 key data for identification.
     */
    private extractKeyFingerprint;
    private createAppOctokit;
    private createInstallationOctokit;
}
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