import type { Address } from 'viem';
import type { CrossChainSettlementLayer } from '../../smart-sessions/types.js';
/**
 * Collects every distinct arbiter address for the given settlement layers. The
 * resulting whitelist is what the Permit2 claim policy enforces on-chain — a
 * session signed once with this whitelist is valid against any of those
 * arbiters.
 *
 * **"Any" means any of the *supported* settlement layers**, not any address on
 * earth. When `layers` is empty or undefined, this expands to the union of
 * every layer in {@link SETTLEMENT_LAYER_CONTRACT_KEYS}, so the on-chain arbiter
 * check stays meaningful (the worst case is still a Rhinestone-blessed arbiter).
 *
 * @param layers   Settlement layers the session is permitted to use.
 *                 Empty/undefined ⇒ all supported layers.
 * @param useDevContracts  Pull from the dev address book instead of mainnet.
 */
export declare function getArbitersForSettlementLayers(layers: readonly CrossChainSettlementLayer[] | undefined, useDevContracts?: boolean): Address[] | undefined;
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