/**
 * @name policy/spending-limits
 * @description Spending limit enforcement utilities for SAP MCP transactions.
 *
 * Provides functions to validate transaction amounts against configured maximums
 * and approval thresholds, and to derive a risk level from the transaction amount.
 *
 * @module policy/spending-limits
 */
import type { SapMcpConfig } from '../../core/src/types.js';
/**
 * @name checkSpendingLimit
 * @description Check if a transaction amount is within configured spending limits.
 *
 * Compares the amount against `maxTxValueSol` (hard ceiling) and
 * `requireApprovalAboveSol` (approval threshold). Returns a result object
 * indicating whether the transaction is allowed, requires approval, or is blocked.
 *
 * @param config - The SAP MCP server configuration containing spending limits.
 * @param amountSol - The transaction amount in SOL to validate.
 * @returns An object with `allowed` flag, optional `reason` string, and optional `requiresApproval` flag.
 *
 * @usedBy `policy-engine.ts:PolicyEngine.checkPermission`
 */
export declare function checkSpendingLimit(config: SapMcpConfig, amountSol: number): {
    allowed: boolean;
    reason?: string;
    requiresApproval?: boolean;
};
/**
 * @name calculateRiskLevel
 * @description Calculate risk level based solely on transaction amount in SOL.
 *
 * Maps amount thresholds to risk tiers: 0 SOL is `safe`, <0.1 is `low`,
 * <1.0 is `medium`, <10.0 is `high`, and 10.0+ is `critical`.
 *
 * @param amountSol - The transaction amount in SOL.
 * @returns A risk level string: `safe`, `low`, `medium`, `high`, or `critical`.
 *
 * @usedBy `spending-limits.ts:checkSpendingLimit`
 */
export declare function calculateRiskLevel(amountSol: number): 'safe' | 'low' | 'medium' | 'high' | 'critical';
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