import { type Address, type PublicClient, type StateMapping, type StateOverride } from "viem";
import { type SlotHints } from "./slotHints.js";
/**
 * Compute Permit2 allowance storage slots for the given approvals.
 *
 * Permit2 uses: mapping(owner => mapping(token => mapping(spender => PackedAllowance)))
 * Storage slot 1 is the base slot for the allowance mapping.
 */
export declare function computePermit2StateDiff(account: Address, approvals: [Address, Address][]): StateMapping;
export type GetApprovalOverridesOptions = {
    /**
     * Caller-supplied on-chain allowances keyed by `${asset}:${spender}`.
     * When the supplied allowance is `maxUint256` the approval override for
     * that pair is skipped entirely (no override, no RPC).
     */
    walletAllowances?: Record<`${Address}:${Address}`, bigint>;
    /**
     * Caller-supplied slot hints. When `allowanceSlotIndex` is present for an
     * asset, the storage slot is computed cryptographically and no probing
     * RPC fires.
     */
    slotHints?: SlotHints;
};
/**
 * Generate state overrides for ERC20 approvals and Permit2 allowances.
 *
 * Resolution order, per asset:
 *  1. Permit2 storage slots are always derivable cryptographically — no RPC.
 *  2. Apply caller-supplied `walletAllowances[asset:spender]` — if `maxUint256`,
 *     skip emitting an override entirely.
 *  3. Use caller-supplied `slotHints[asset].allowanceSlotIndex` →
 *     cryptographic slot, no RPC.
 *  4. Use cached probed slot index (`fetchErc20SlotHints` cache) → same.
 *  5. Probe once via `eth_createAccessList`; this handles proxy / namespaced token
 *     layouts without burning many failed state-override reads first.
 *  6. Fall back to sequential `fetchErc20SlotHints` probing when access-list
 *     discovery is unavailable.
 */
export declare function getApprovalOverrides(client: PublicClient, account: Address, approvals: [Address, Address][], permit2Address: Address, options?: GetApprovalOverridesOptions): Promise<StateOverride>;
//# sourceMappingURL=approvalOverrides.d.ts.map