/**
 * Postgres-backed SpendStore + DecisionLogStore.
 *
 * Install: `npm install @agentguard-run/spend pg`
 *
 * UPSERT semantics for window spend. Append-only decision log table
 * with UNIQUE(signer_fingerprint, sequence) for crash-safe chain ordering.
 *
 * @example
 *   import { Pool } from 'pg';
 *   import {
 *     PostgresSpendStore, PostgresDecisionLogStore, ensureSchema,
 *   } from '@agentguard-run/spend/dist/adapters/postgres-store';
 *
 *   const pool = new Pool({ connectionString: process.env.DATABASE_URL });
 *   await ensureSchema(pool);
 *   const config = {
 *     policy,
 *     spendStore: new PostgresSpendStore(pool),
 *     logStore: new PostgresDecisionLogStore(pool),
 *     signingKeys: { privateKey, publicKey },
 *   };
 */
import type { SignedDecisionLogEntry, SpendStore, DecisionLogStore, SpendWindow } from '../types';
type PoolLike = {
    query(text: string, params?: any[]): Promise<{
        rows: any[];
        rowCount: number | null;
    }>;
};
/** Create the required tables/indexes if they don't exist. Idempotent. */
export declare function ensureSchema(pool: PoolLike): Promise<void>;
export declare class PostgresSpendStore implements SpendStore {
    private pool;
    constructor(pool: PoolLike);
    getWindowSpend(scopeKey: string, window: SpendWindow): Promise<number>;
    incrementWindowSpend(scopeKey: string, window: SpendWindow, cents: number): Promise<number>;
    reserveWindowSpend(scopeKey: string, window: SpendWindow, cents: number, limitCents: number): Promise<{
        allowed: boolean;
        before: number;
        after: number;
    }>;
    settleWindowSpend(scopeKey: string, window: SpendWindow, deltaCents: number): Promise<number>;
}
export declare class PostgresDecisionLogStore implements DecisionLogStore {
    private pool;
    constructor(pool: PoolLike);
    append(entry: SignedDecisionLogEntry): Promise<void>;
    getLatest(signerFingerprint?: string): Promise<SignedDecisionLogEntry | null>;
    read(fromSequence: number, limit: number, signerFingerprint?: string): Promise<SignedDecisionLogEntry[]>;
}
export {};
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