export interface ReceiptEvent<T = unknown> {
    schemaVersion: "receipt-event/1.0";
    domain: string;
    transactionId: string;
    sequence: number;
    previousEventHash: string | null;
    snapshotHash: string;
    snapshot: T;
    eventHash: string;
}
export interface LkgRecord {
    schemaVersion: "lkg-record/1.0";
    domain: string;
    transactionId: string;
    sequence: number;
    previousRecordHash: string | null;
    receiptEventHash: string;
    planHash: string;
    observedHash: string;
    recordHash: string;
}
export interface ReceiptKey {
    root: string;
    stateDirectory?: "harness" | ".harness";
    domain: string;
    transactionId: string;
}
export interface ReceiptProjection {
    root: string;
    path: string;
}
/** Includes durable receipts whose LKG append has not completed. Callers still validate each chain. */
export declare function listReceiptTransactions(args: Pick<ReceiptKey, "root" | "stateDirectory" | "domain">): string[];
export declare function readReceiptChain<T = unknown>(args: ReceiptKey & {
    compatibilitySnapshot?: unknown;
}): ReceiptEvent<T>[];
export declare function readLatestReceiptEvent<T = unknown>(args: ReceiptKey & {
    compatibilitySnapshot?: unknown;
}): ReceiptEvent<T> | null;
/** Persist the immutable event before updating its mutable compatibility projection. */
export declare function appendReceiptEvent<T>(args: ReceiptKey & {
    snapshot: T;
    projection?: ReceiptProjection;
}): ReceiptEvent<T>;
export declare function readLkgChain(args: Pick<ReceiptKey, "root" | "stateDirectory" | "domain">): LkgRecord[];
export declare function readLatestLkgRecord(args: Pick<ReceiptKey, "root" | "stateDirectory" | "domain">): LkgRecord | null;
/** Record only an explicit, already-persisted applied receipt event as last-known-good. */
export declare function appendLkgRecord(args: ReceiptKey & {
    appliedReceiptEventHash: string;
    planHash: string;
    observedHash: string;
}): LkgRecord;
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