import { type Hex } from 'viem';
/**
 * Utility for hashing a message hash. This computes the storage slot
 * where the message hash will be stored in state. 0 is used
 * because the first mapping in the contract is used.
 *
 * @param messageHash sent message hash, i.e. keccak256(abi.encode({...WithdrawalTransaction})).
 * @returns The storage slot in L2ToL1MessagePasser of the sent message
 */
export declare const getWithdrawalMessageStorageSlot: (messageHash: Hex) => Hex;
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