export type ConnectionErrorReason = 'unreachable' | 'authentication' | 'unknown_database' | 'unknown';
export interface ConnectionErrorInit {
    message: string;
    reason: ConnectionErrorReason;
    host?: string;
    port?: number;
    database?: string;
    hint?: string;
    cause?: unknown;
}
export declare class ConnectionError extends Error {
    readonly name = "ConnectionError";
    readonly reason: ConnectionErrorReason;
    readonly host?: string;
    readonly port?: number;
    readonly database?: string;
    readonly hint?: string;
    readonly cause?: unknown;
    constructor(init: ConnectionErrorInit);
}
export interface PgErrorContext {
    host?: string;
    port?: number;
    database?: string;
}
export declare function wrapPgError(err: unknown, ctx: PgErrorContext): ConnectionError;