export declare const IRIS_ATTESTATION_API_URL = "https://iris-api-sandbox.circle.com";
export declare enum AttestationStatus {
    complete = "complete",
    pending_confirmations = "pending_confirmations"
}
export interface AttestationResponse {
    attestation: string | null;
    status: AttestationStatus;
}
export interface Attestation {
    message: string | null;
    status: AttestationStatus;
}
export declare const getAttestation: (messageHash: string) => Promise<Attestation | null>;