/**
 * Wallet-balance retry helper.
 *
 * Used by the agent UI's startup balance fetch and the post-turn refresh.
 * Some wallet client paths return `0` transiently — for example, when the
 * SDK is queried before the chain provider has finished initializing — even
 * when the on-chain balance is non-zero. A single defensive retry catches
 * that case without lengthening the path for a genuinely empty wallet:
 * empty wallets still resolve to `0` in roughly two RPC round-trips.
 */
export interface RetryOptions {
    /** Delay between the first and second attempt, in milliseconds. */
    delayMs?: number;
}
export declare function retryFetchBalance(fetchOnce: () => Promise<number>, opts?: RetryOptions): Promise<number>;