import { PythiaClientError } from "./errors.js";
/**
 * Decode a non-2xx PYTHIA service response into the matching client-side typed
 * error, discriminating on the envelope's self-identifying `code`:
 * `pythia_pool_exhausted` → {@link PythiaPoolExhaustedError} (with
 * `failures`/`chainId`); `pythia_unsupported_chain` →
 * {@link PythiaUnsupportedChainError}; `pythia_validation` →
 * {@link PythiaValidationError}; anything else (incl. `pythia_upstream` and an
 * absent code) → the base {@link PythiaClientError}. Only PYTHIA's own envelopes
 * reach here — node-arrived relay responses are returned verbatim by the client.
 */
export declare function mapServiceError(status: number, body: unknown): PythiaClientError;
/** Whether a service response body is one of Pythia's OWN error envelopes (as
 * opposed to a node-arrived relay body). Keys off the self-identifying `code`
 * discriminator: only Pythia's own bodies carry a known `code`. Used by the
 * `read`/`send` relays to decide whether a non-2xx response is mapped to a typed
 * error or returned verbatim — a node's own `{error:"…"}` 400 has no `code` and
 * is passed through. */
export declare function isPythiaErrorEnvelope(_status: number, body: unknown): boolean;