import type { BudgetLimit, PolicyApproval, PolicyDecision, PolicyEngineOptions, PolicyRequest, PolicyRule, PolicyState } from './types.js';
export declare class AgenticPolicyEngine {
    private readonly now;
    private readonly signingKey?;
    private readonly keyId?;
    private readonly evidenceVerifier?;
    private readonly approvalIssuerVerifier?;
    private state;
    constructor(options?: PolicyEngineOptions);
    static fromState(state: PolicyState, options?: Omit<PolicyEngineOptions, 'mode' | 'rules' | 'budgets' | 'usage' | 'approvals' | 'receipts'>): AgenticPolicyEngine;
    exportState(): PolicyState;
    setMode(mode: PolicyState['mode']): void;
    setConfiguredMode(mode: PolicyState['mode']): void;
    upsertRule(rule: PolicyRule): void;
    setBudget(limit: BudgetLimit): void;
    issueApproval(approval: Omit<PolicyApproval, 'uses' | 'issuedAt'> & {
        uses?: number;
        issuedAt?: number;
    }): PolicyApproval;
    revokeApproval(id: string): boolean;
    evaluate(request: PolicyRequest): PolicyDecision;
    verifyLedger(): {
        valid: boolean;
        length: number;
        error?: string;
    };
    private applyBudget;
    private applyApproval;
    private consumeBudget;
    private appendReceipt;
    private validateRequest;
}
export declare function createLegacyCompatibleState(source?: string): PolicyState;
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