import { ParametersSpendProof, SaplingSpendDescription } from '../types';
/**
 * holds the proving key, create proof for spend descriptions
 * The class can be instantiated from a proving key or a spending key
 */
export declare class InMemoryProvingKey {
    #private;
    constructor(provingKey: string);
    /**
     * Allows to instantiate the InMemoryProvingKey from an encrypted/unencrypted spending key
     *
     * @param spendingKey Base58Check-encoded spending key
     * @param password Optional password to decrypt the spending key
     * @example
     * ```
     * await InMemoryProvingKey.fromSpendingKey('sask27SLmU9herddHz4qFJBLMjWYMbJF8RtS579w9ej9mfCYK7VUdyCJPHK8AzW9zMsopGZEkYeNjAY7Zz1bkM7CGu8eKLzrjBLTMC5wWJDhxiK91ahA29rhDRsHdJDV2u2jFwb2MNUix8JW7sAkAqYVaJpCehTBPgRQ1KqKwqqUaNmuD8kazd4Q8MCWmgbWs21Yuomdqyi9FLigjRp7oY4m5adaVU19Nj1AHvsMY2tePeU2L')
     * ```
     *
     */
    static fromSpendingKey(spendingKey: string, password?: string): Promise<InMemoryProvingKey>;
    /**
     * Prepare an unsigned sapling spend description using the proving key
     *
     * @param parametersSpendProof.saplingContext The sapling proving context
     * @param parametersSpendProof.address The address of the input
     * @param parametersSpendProof.randomCommitmentTrapdoor The randomness of the commitment
     * @param parametersSpendProof.publicKeyReRandomization The re-randomization of the public key
     * @param parametersSpendProof.amount The value of the input
     * @param parametersSpendProof.root The root of the merkle tree
     * @param parametersSpendProof.witness The path of the commitment in the tree
     * @returns The unsinged spend description
     */
    prepareSpendDescription(parametersSpendProof: Omit<ParametersSpendProof, 'spendingKey'>): Promise<Omit<SaplingSpendDescription, 'signature'>>;
}