## API Report File for "@tldraw/store"

> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).

```ts

import { Atom } from '@tldraw/state';
import { Computed } from '@tldraw/state';

// @public
export type AllRecords<T extends Store<any>> = ExtractR<ExtractRecordType<T>>;

// @public
export function assertIdType<R extends UnknownRecord>(id: string | undefined, type: RecordType<R, any>): asserts id is IdOf<R>;

// @public
export interface BaseRecord<TypeName extends string, Id extends RecordId<UnknownRecord>> {
    // (undocumented)
    readonly id: Id;
    // (undocumented)
    readonly typeName: TypeName;
}

// @public
export type CollectionDiff<T> = {
    added?: Set<T>;
    removed?: Set<T>;
};

// @public (undocumented)
export function compareRecordVersions(a: RecordVersion, b: RecordVersion): -1 | 0 | 1;

// @public (undocumented)
export const compareSchemas: (a: SerializedSchema, b: SerializedSchema) => -1 | 0 | 1;

// @public
export type ComputedCache<Data, R extends UnknownRecord> = {
    get(id: IdOf<R>): Data | undefined;
};

// @public
export function createRecordType<R extends UnknownRecord>(typeName: R['typeName'], config: {
    migrations?: Migrations;
    validator?: StoreValidator<R>;
    scope: RecordScope;
}): RecordType<R, keyof Omit<R, 'id' | 'typeName'>>;

// @public (undocumented)
export function defineMigrations<FirstVersion extends EMPTY_SYMBOL | number = EMPTY_SYMBOL, CurrentVersion extends EMPTY_SYMBOL | Exclude<number, 0> = EMPTY_SYMBOL>(opts: {
    firstVersion?: CurrentVersion extends number ? FirstVersion : never;
    currentVersion?: CurrentVersion;
    migrators?: CurrentVersion extends number ? FirstVersion extends number ? CurrentVersion extends FirstVersion ? {
        [version in Exclude<Range_2<1, CurrentVersion>, 0>]: Migration;
    } : {
        [version in Exclude<Range_2<FirstVersion, CurrentVersion>, FirstVersion>]: Migration;
    } : {
        [version in Exclude<Range_2<1, CurrentVersion>, 0>]: Migration;
    } : never;
    subTypeKey?: string;
    subTypeMigrations?: Record<string, BaseMigrationsInfo>;
}): Migrations;

// @public
export function devFreeze<T>(object: T): T;

// @public (undocumented)
export function getRecordVersion(record: UnknownRecord, serializedSchema: SerializedSchema): RecordVersion;

// @public
export type HistoryEntry<R extends UnknownRecord = UnknownRecord> = {
    changes: RecordsDiff<R>;
    source: ChangeSource;
};

// @public (undocumented)
export type IdOf<R extends UnknownRecord> = R['id'];

// @internal
export class IncrementalSetConstructor<T> {
    constructor(
    previousValue: Set<T>);
    // @public
    add(item: T): void;
    // @public
    get(): {
        value: Set<T>;
        diff: CollectionDiff<T>;
    } | undefined;
    // @public
    remove(item: T): void;
}

// @public (undocumented)
export function migrate<T>({ value, migrations, fromVersion, toVersion, }: {
    value: unknown;
    migrations: Migrations;
    fromVersion: number;
    toVersion: number;
}): MigrationResult<T>;

// @public (undocumented)
export function migrateRecord<R extends UnknownRecord>({ record, migrations, fromVersion, toVersion, }: {
    record: unknown;
    migrations: Migrations;
    fromVersion: number;
    toVersion: number;
}): MigrationResult<R>;

// @public (undocumented)
export type Migration<Before = any, After = any> = {
    up: (oldState: Before) => After;
    down: (newState: After) => Before;
};

// @public (undocumented)
export enum MigrationFailureReason {
    // (undocumented)
    IncompatibleSubtype = "incompatible-subtype",
    // (undocumented)
    MigrationError = "migration-error",
    // (undocumented)
    TargetVersionTooNew = "target-version-too-new",
    // (undocumented)
    TargetVersionTooOld = "target-version-too-old",
    // (undocumented)
    UnknownType = "unknown-type",
    // (undocumented)
    UnrecognizedSubtype = "unrecognized-subtype"
}

// @public (undocumented)
export type MigrationResult<T> = {
    type: 'error';
    reason: MigrationFailureReason;
} | {
    type: 'success';
    value: T;
};

// @public (undocumented)
export interface Migrations extends BaseMigrationsInfo {
    // (undocumented)
    subTypeKey?: string;
    // (undocumented)
    subTypeMigrations?: Record<string, BaseMigrationsInfo>;
}

// @public (undocumented)
export type RecordId<R extends UnknownRecord> = string & {
    __type__: R;
};

// @public
export type RecordsDiff<R extends UnknownRecord> = {
    added: Record<IdOf<R>, R>;
    updated: Record<IdOf<R>, [from: R, to: R]>;
    removed: Record<IdOf<R>, R>;
};

// @public
export class RecordType<R extends UnknownRecord, RequiredProperties extends keyof Omit<R, 'id' | 'typeName'>> {
    constructor(
    typeName: R['typeName'], config: {
        readonly createDefaultProperties: () => Exclude<OmitMeta<R>, RequiredProperties>;
        readonly migrations: Migrations;
        readonly validator?: StoreValidator<R>;
        readonly scope?: RecordScope;
    });
    clone(record: R): R;
    create(properties: Pick<R, RequiredProperties> & Omit<Partial<R>, RequiredProperties>): R;
    // @deprecated
    createCustomId(id: string): IdOf<R>;
    // (undocumented)
    readonly createDefaultProperties: () => Exclude<OmitMeta<R>, RequiredProperties>;
    createId(customUniquePart?: string): IdOf<R>;
    isId(id?: string): id is IdOf<R>;
    isInstance: (record?: UnknownRecord) => record is R;
    // (undocumented)
    readonly migrations: Migrations;
    parseId(id: IdOf<R>): string;
    // (undocumented)
    readonly scope: RecordScope;
    readonly typeName: R['typeName'];
    validate(record: unknown, recordBefore?: R): R;
    // (undocumented)
    readonly validator: StoreValidator<R>;
    withDefaultProperties<DefaultProps extends Omit<Partial<R>, 'id' | 'typeName'>>(createDefaultProperties: () => DefaultProps): RecordType<R, Exclude<RequiredProperties, keyof DefaultProps>>;
}

// @public (undocumented)
export type RecordVersion = {
    rootVersion: number;
    subTypeVersion?: number;
};

// @public (undocumented)
export function reverseRecordsDiff(diff: RecordsDiff<any>): RecordsDiff<any>;

// @public (undocumented)
export interface SerializedSchema {
    recordVersions: Record<string, {
        version: number;
        subTypeVersions: Record<string, number>;
        subTypeKey: string;
    } | {
        version: number;
    }>;
    schemaVersion: number;
    storeVersion: number;
}

// @public
export type SerializedStore<R extends UnknownRecord> = Record<IdOf<R>, R>;

// @public
export function squashRecordDiffs<T extends UnknownRecord>(diffs: RecordsDiff<T>[]): RecordsDiff<T>;

// @public
export class Store<R extends UnknownRecord = UnknownRecord, Props = unknown> {
    constructor(config: {
        initialData?: SerializedStore<R>;
        schema: StoreSchema<R, Props>;
        props: Props;
    });
    allRecords: () => R[];
    // (undocumented)
    applyDiff(diff: RecordsDiff<R>, runCallbacks?: boolean): void;
    clear: () => void;
    createComputedCache: <T, V extends R = R>(name: string, derive: (record: V) => T | undefined, isEqual?: ((a: V, b: V) => boolean) | undefined) => ComputedCache<T, V>;
    createSelectedComputedCache: <T, J, V extends R = R>(name: string, selector: (record: V) => T | undefined, derive: (input: T) => J | undefined) => ComputedCache<J, V>;
    // @internal (undocumented)
    ensureStoreIsUsable(): void;
    // (undocumented)
    extractingChanges(fn: () => void): RecordsDiff<R>;
    filterChangesByScope(change: RecordsDiff<R>, scope: RecordScope): {
        added: { [K in IdOf<R>]: R; };
        updated: { [K_1 in IdOf<R>]: [from: R, to: R]; };
        removed: { [K in IdOf<R>]: R; };
    } | null;
    // (undocumented)
    _flushHistory(): void;
    get: <K extends IdOf<R>>(id: K) => RecFromId<K> | undefined;
    // (undocumented)
    getRecordType: <T extends R>(record: R) => T;
    getSnapshot(scope?: 'all' | RecordScope): StoreSnapshot<R>;
    has: <K extends IdOf<R>>(id: K) => boolean;
    readonly history: Atom<number, RecordsDiff<R>>;
    readonly id: string;
    // @internal (undocumented)
    isPossiblyCorrupted(): boolean;
    listen: (onHistory: StoreListener<R>, filters?: Partial<StoreListenerFilters>) => () => void;
    loadSnapshot(snapshot: StoreSnapshot<R>): void;
    // @internal (undocumented)
    markAsPossiblyCorrupted(): void;
    mergeRemoteChanges: (fn: () => void) => void;
    migrateSnapshot(snapshot: StoreSnapshot<R>): StoreSnapshot<R>;
    onAfterChange?: (prev: R, next: R, source: 'remote' | 'user') => void;
    onAfterCreate?: (record: R, source: 'remote' | 'user') => void;
    onAfterDelete?: (prev: R, source: 'remote' | 'user') => void;
    onBeforeChange?: (prev: R, next: R, source: 'remote' | 'user') => R;
    onBeforeCreate?: (next: R, source: 'remote' | 'user') => R;
    onBeforeDelete?: (prev: R, source: 'remote' | 'user') => false | void;
    // (undocumented)
    readonly props: Props;
    put: (records: R[], phaseOverride?: 'initialize') => void;
    readonly query: StoreQueries<R>;
    remove: (ids: IdOf<R>[]) => void;
    // (undocumented)
    readonly schema: StoreSchema<R, Props>;
    // (undocumented)
    readonly scopedTypes: {
        readonly [K in RecordScope]: ReadonlySet<R['typeName']>;
    };
    serialize: (scope?: 'all' | RecordScope) => SerializedStore<R>;
    unsafeGetWithoutCapture: <K extends IdOf<R>>(id: K) => RecFromId<K> | undefined;
    update: <K extends IdOf<R>>(id: K, updater: (record: RecFromId<K>) => RecFromId<K>) => void;
    // (undocumented)
    validate(phase: 'createRecord' | 'initialize' | 'tests' | 'updateRecord'): void;
}

// @public (undocumented)
export type StoreError = {
    error: Error;
    phase: 'createRecord' | 'initialize' | 'tests' | 'updateRecord';
    recordBefore?: unknown;
    recordAfter: unknown;
    isExistingValidationIssue: boolean;
};

// @public
export type StoreListener<R extends UnknownRecord> = (entry: HistoryEntry<R>) => void;

// @public (undocumented)
export class StoreSchema<R extends UnknownRecord, P = unknown> {
    // (undocumented)
    static create<R extends UnknownRecord, P = unknown>(types: {
        [TypeName in R['typeName']]: {
            createId: any;
        };
    }, options?: StoreSchemaOptions<R, P>): StoreSchema<R, P>;
    // @internal (undocumented)
    createIntegrityChecker(store: Store<R, P>): (() => void) | undefined;
    // (undocumented)
    get currentStoreVersion(): number;
    // (undocumented)
    migratePersistedRecord(record: R, persistedSchema: SerializedSchema, direction?: 'down' | 'up'): MigrationResult<R>;
    // (undocumented)
    migrateStoreSnapshot(snapshot: StoreSnapshot<R>): MigrationResult<SerializedStore<R>>;
    // (undocumented)
    serialize(): SerializedSchema;
    // (undocumented)
    serializeEarliestVersion(): SerializedSchema;
    // (undocumented)
    readonly types: {
        [Record in R as Record['typeName']]: RecordType<R, any>;
    };
    // (undocumented)
    validateRecord(store: Store<R>, record: R, phase: 'createRecord' | 'initialize' | 'tests' | 'updateRecord', recordBefore: null | R): R;
}

// @public (undocumented)
export type StoreSchemaOptions<R extends UnknownRecord, P> = {
    snapshotMigrations?: Migrations;
    onValidationFailure?: (data: {
        error: unknown;
        store: Store<R>;
        record: R;
        phase: 'createRecord' | 'initialize' | 'tests' | 'updateRecord';
        recordBefore: null | R;
    }) => R;
    createIntegrityChecker?: (store: Store<R, P>) => void;
};

// @public (undocumented)
export type StoreSnapshot<R extends UnknownRecord> = {
    store: SerializedStore<R>;
    schema: SerializedSchema;
};

// @public (undocumented)
export type StoreValidator<R extends UnknownRecord> = {
    validate: (record: unknown) => R;
    validateUsingKnownGoodVersion?: (knownGoodVersion: R, record: unknown) => R;
};

// @public (undocumented)
export type StoreValidators<R extends UnknownRecord> = {
    [K in R['typeName']]: StoreValidator<Extract<R, {
        typeName: K;
    }>>;
};

// @public (undocumented)
export type UnknownRecord = BaseRecord<string, RecordId<UnknownRecord>>;

// (No @packageDocumentation comment for this package)

```