/**
 * @name policy/risk-level
 * @description Risk level calculation utilities for SAP MCP transactions.
 *
 * Provides functions to compute a `SapRiskLevel` from transaction parameters
 * and determine whether a given risk level requires human approval.
 *
 * @module policy/risk-level
 */
import type { SapRiskLevel } from '../../core/src/types.js';
/**
 * @name calculateRiskLevel
 * @description Calculate risk level for a transaction based on amount and operation type.
 *
 * Evaluates the transaction amount, whether it is a write operation, and whether
 * it targets a known program to produce a graduated risk level from `safe` to `critical`.
 * Write operations elevate risk by one tier; known operations reduce risk by one tier.
 *
 * @param params - Transaction parameters including amount, write flag, known flag, and tool name.
 * @param params.amountSol - Transaction amount in SOL.
 * @param params.isWriteOperation - Whether the operation mutates on-chain state.
 * @param params.isKnownOperation - Whether the target program is in the known set.
 * @param params.toolName - Name of the tool invoking the transaction.
 * @returns A `SapRiskLevel` string: `safe`, `low`, `medium`, `high`, or `critical`.
 *
 * @usedBy `policy-engine.ts:PolicyEngine.checkPermission`
 */
export declare function calculateRiskLevel(params: {
    amountSol: number;
    isWriteOperation: boolean;
    isKnownOperation: boolean;
    toolName: string;
}): SapRiskLevel;
/**
 * @name requiresApproval
 * @description Check if a risk level requires human approval before execution.
 *
 * Returns `true` when the risk level is `high` or `critical`, indicating
 * that the operation should be escalated for manual review.
 *
 * @param riskLevel - The risk level to evaluate.
 * @returns `true` if the risk level is `high` or `critical`; otherwise `false`.
 *
 * @usedBy `policy-engine.ts:PolicyEngine.checkPermission`
 */
export declare function requiresApproval(riskLevel: SapRiskLevel): boolean;
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