one/types/background/backgroundContract.d.ts

One is a React framework for web, iOS, and Android apps.

export type BackgroundRequest<Input> = {
    revision: number;
    input: Input;
};
export type BackgroundResult<Output> = {
    revision: number;
    value: Output;
};
export type BackgroundResponse<Output> = {
    ok: true;
    result: BackgroundResult<Output>;
} | {
    ok: false;
    revision: number;
    error: string;
};
export type BackgroundState<Output> = {
    phase: 'idle';
    revision: number;
} | {
    phase: 'computing';
    revision: number;
} | {
    phase: 'ready';
    result: BackgroundResult<Output>;
} | {
    phase: 'failed';
    revision: number;
    error: Error;
};
export type BackgroundExecutor<Input, Output> = {
    execute: (request: BackgroundRequest<Input>, isCurrent: (revision: number) => boolean) => Promise<BackgroundResult<Output> | null>;
    dispose: () => void;
};
export type BackgroundComputation<Input, Output> = {
    readonly createExecutor: () => BackgroundExecutor<Input, Output>;
};
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