import { AbstractContract } from '../abstractContract.js';
import { SHPreimage } from '../types/index.js';
/**
 * Verifies a signature against the contract's public key using the provided SH preimage.
 *
 * This function uses a two-step verification process:
 * 1. checkDataSig - verifies the signature against sha256(serialized_preimage)
 *    Since checkDataSig internally applies sha256, it becomes sha256(sha256(preimage)) = hash256(preimage)
 * 2. checkSig - verifies the signature against the actual transaction preimage (hash256)
 *
 * The signature is expected to be pre-generated off-chain over hash256(preimage)
 * and injected via the _injectedPreimageSig property on SmartContract instances.
 *
 * @ignore
 * @param self - The contract instance to verify against
 * @param shPreimage - The SH preimage containing the signature to verify
 * @returns True if the signature is valid for this contract's public key
 */
export declare function checkSHPreimageImpl(self: AbstractContract, shPreimage: SHPreimage): boolean;
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