import { FirebaseEdgeError } from './errors.js';
export type GithubTokenResponse = {
    access_token: string;
    token_type: string;
    scope: string;
};
export type GithubOAuthError = {
    error: string;
    error_description?: string;
    error_uri?: string;
};
export declare function exchangeCodeForGitHubIdToken(code: string, redirect_uri: string, client_id: string, client_secret: string, fetchFn?: typeof globalThis.fetch): Promise<{
    data: null;
    error: FirebaseEdgeError;
} | {
    data: GithubTokenResponse | null;
    error: null;
}>;
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