import { ACEvent, ACSState, PaginatedACSState } from '../../types';
import { AbstractLedgerProvider } from '@canton-network/core-provider-ledger';
import { LedgerCommonSchemas } from '@canton-network/core-ledger-client-types';
import pino from 'pino';
import { ResolvedAcsOptions, AcsService, PaginatedResolvedAcsOptions } from '../../service';
export declare const logger: pino.Logger<never, boolean>;
/**
 * Checks if an event represents a contract creation.
 * Used to distinguish between created and archived events when processing cache updates.
 */
export declare function isCreatedEvent(event: ACEvent): event is ACEvent & {
    archived: false;
    event: LedgerCommonSchemas['CreatedEvent'];
};
export type BaseCache<Paginated extends boolean> = {
    State: Paginated extends true ? PaginatedACSState : ACSState;
    Options: Paginated extends true ? PaginatedResolvedAcsOptions : ResolvedAcsOptions;
    ReturnValue: ReturnType<AcsService[Paginated extends true ? 'getPaginatedActiveContracts' : 'getActiveContracts']>;
};
export declare abstract class BaseACSCache<Paginated extends boolean = false> {
    protected readonly ledger: AbstractLedgerProvider;
    protected abstract readonly state: BaseCache<Paginated>['State'];
    protected readonly service: AcsService;
    constructor(ledger: AbstractLedgerProvider);
    /**
     * Updates the cache to include ledger changes up to the specified offset.
     * Fetches and applies incremental updates from the ledger, initializing the cache if needed.
     * Automatically prunes old events when the update buffer exceeds configured thresholds (when not in pagination mode).
     */
    abstract update(options: BaseCache<Paginated>['Options']): Promise<void>;
    /**
     * Calculates the active contract set at a specific ledger offset.
     * Applies cached updates to the initial snapshot and filters out archived contracts.
     * Throws an error if the cache is not initialized or the requested offset is too old.
     */
    abstract calculateAt(offset: number): LedgerCommonSchemas['JsGetActiveContractsResponse'][];
}
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