import { AuthParams, SupportedTransactionPayload, TransactionIDPayload } from '@zeniai/client-epic-state';
export interface TransactionAttachmentPayload {
    attachment_id: string;
    transaction_key: TransactionIDPayload;
}
export interface UploadAttachmentPayload {
    transaction: SupportedTransactionPayload;
}
export default function downloadAndSaveAttachment(transactionAttachmentEndPoint: string, authParams: AuthParams, attachmentPayload: TransactionAttachmentPayload, billFileName?: string): Promise<void>;