import type { DB, Transaction } from '@op-engineering/op-sqlite';
export interface PendingTransaction {
    readonly: boolean;
    start: (tx: Transaction) => Promise<void>;
    finish: () => void;
}
export declare class TransactionQueue {
    queue: PendingTransaction[];
    inProgress: boolean;
    db: DB;
    constructor(db: DB);
    run(): void;
    push(fn: (tx: Transaction) => Promise<void>): Promise<void>;
    pushReadOnly(fn: (tx: Transaction) => Promise<void>): Promise<void>;
}
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