/**
 * Custom errors for the validator HA signer
 */
import type { SlotNumber } from '@aztec/foundation/branded-types';
import type { DutyType } from './db/types.js';
/**
 * Thrown when a duty has already been signed (by any node).
 * This is expected behavior in an HA setup - all nodes try to sign,
 * the first one wins, and subsequent attempts get this error.
 */
export declare class DutyAlreadySignedError extends Error {
    readonly slot: SlotNumber;
    readonly dutyType: DutyType;
    readonly blockIndexWithinCheckpoint: number;
    readonly signedByNode: string;
    constructor(slot: SlotNumber, dutyType: DutyType, blockIndexWithinCheckpoint: number, signedByNode: string);
}
/**
 * Thrown when the slashing-protection record for an in-flight signing operation can no longer be
 * updated because it is no longer owned by this node - for example, the stuck-duty cleanup loop
 * deleted the SIGNING row while the remote signer was slow. The produced signature must be
 * discarded rather than broadcast: with no protection record in place, a later attempt for the
 * same duty with different data would sign freely, which is slashable equivocation.
 */
export declare class SigningLockLostError extends Error {
    readonly slot: SlotNumber;
    readonly dutyType: DutyType;
    readonly nodeId: string;
    constructor(slot: SlotNumber, dutyType: DutyType, nodeId: string);
}
/**
 * Thrown when attempting to sign data that conflicts with an already-signed duty.
 * This means the same validator tried to sign DIFFERENT data for the same slot.
 *
 * This is expected in HA setups where nodes may build different blocks
 * (e.g., different transaction ordering) - the protection prevents double-signing.
 */
export declare class SlashingProtectionError extends Error {
    readonly slot: SlotNumber;
    readonly dutyType: DutyType;
    readonly blockIndexWithinCheckpoint: number;
    readonly existingMessageHash: string;
    readonly attemptedMessageHash: string;
    readonly signedByNode: string;
    constructor(slot: SlotNumber, dutyType: DutyType, blockIndexWithinCheckpoint: number, existingMessageHash: string, attemptedMessageHash: string, signedByNode: string);
}
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