import { type Address } from "@morpho-org/blue-sdk";
/** Supported spender slots that can be validated against the chain address registry. */
export type RequirementSpenderKey = "generalAdapter1" | "permit2" | "midnight" | "midnightBundles" | "vaultExitBundlesV1";
/**
 * Validates that a requirement encoder spender matches one of the allowed chain addresses.
 *
 * @param params - Spender validation parameters.
 * @param params.chainId - Chain id used to resolve supported spender addresses.
 * @param params.spender - Spender address to validate.
 * @param params.allowed - Allowed registry slots for this requirement.
 * @returns Nothing after the spender matches an allowed chain address.
 * @throws {UnsupportedErc20ApprovalSpenderError} when `spender` does not match any allowed slot.
 * @example
 * ```ts
 * import { validateRequirementSpender } from "@morpho-org/morpho-sdk";
 * import { getChainAddress } from "@morpho-org/morpho-ts";
 *
 * validateRequirementSpender({
 *   chainId: 8453,
 *   spender: getChainAddress(8453, "midnightBundles"),
 *   allowed: ["midnightBundles"],
 * });
 * ```
 */
export declare const validateRequirementSpender: (params: {
    readonly chainId: number;
    readonly spender: Address;
    readonly allowed: readonly RequirementSpenderKey[];
}) => void;