import { type N8nOAuth2FlowResult, type N8nOAuth2RefreshResult } from 'n8n-workflow';
export interface N8nOAuth2Flow {
    begin(resourceUrl: string, metadata?: Record<string, string>): Promise<string>;
    complete(code: string, state: string): Promise<N8nOAuth2FlowResult>;
    refreshVirtualClientToken(refreshToken: string, resourceUrl: string): Promise<N8nOAuth2RefreshResult>;
}
export declare class OAuth2FlowProxy implements N8nOAuth2Flow {
    private provider;
    registerProvider(provider: N8nOAuth2Flow): void;
    begin(resourceUrl: string, metadata?: Record<string, string>): Promise<string>;
    complete(code: string, state: string): Promise<N8nOAuth2FlowResult>;
    refreshVirtualClientToken(refreshToken: string, resourceUrl: string): Promise<N8nOAuth2RefreshResult>;
}