/**
 * Shared types for sequence/signer data storage.
 * This file has no dependencies on crypto libraries, making it safe to import
 * in Cloudflare Workers at module load time.
 */
export declare type SignerData = {
    accountNumber: number;
    sequence: number;
    chainId: string;
};
export declare type LocalStoreFunctions = {
    getLocalData: (key: string) => Promise<any>;
    setLocalData: (key: string, data: any) => void | Promise<void>;
    /**
     * Optional atomic get-and-increment for distributed sequence coordination.
     * If provided, this method is used instead of the local storage logic,
     * enabling coordination across multiple workers/processes (e.g., via Durable Objects).
     */
    getAndIncrementSequence?: (params: {
        chainId: string;
        accountNumber: number;
        chainSequence: number;
    }) => Promise<SignerData>;
};