export declare function prepareSpaceInboxMessage({ message, spaceId, inboxId, encryptionPublicKey, signaturePrivateKey, authorAccountAddress, }: Readonly<{
    message: string;
    spaceId: string;
    inboxId: string;
    encryptionPublicKey: string;
    signaturePrivateKey: string | null;
    authorAccountAddress: string | null;
}>): Promise<{
    readonly signature?: {
        readonly hex: string;
        readonly recovery: number;
    } | undefined;
    readonly ciphertext: string;
    readonly authorAccountAddress?: string | undefined;
}>;
export declare function prepareAccountInboxMessage({ message, accountAddress, inboxId, encryptionPublicKey, signaturePrivateKey, authorAccountAddress, }: Readonly<{
    message: string;
    accountAddress: string;
    inboxId: string;
    encryptionPublicKey: string;
    signaturePrivateKey: string | null;
    authorAccountAddress: string | null;
}>): Promise<{
    readonly signature?: {
        readonly hex: string;
        readonly recovery: number;
    } | undefined;
    readonly ciphertext: string;
    readonly authorAccountAddress?: string | undefined;
}>;
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