84 lines
2.5 KiB
TypeScript
84 lines
2.5 KiB
TypeScript
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// Thin typed client over the tRPC backend (DESIGN.md §2). Slice 1 uses a fetch wrapper
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// rather than @trpc/client to keep the Next app decoupled from the server's Node-native
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// type graph; the server is a real tRPC server and full end-to-end client types can be
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// layered later without changing this surface.
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export interface Quote {
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symbol: string;
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price: number;
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bid?: number | null;
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ask?: number | null;
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change?: number | null;
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changePercent?: number | null;
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iv?: number | null;
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}
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export interface PriceCandle {
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ts: string;
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o: number;
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h: number;
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l: number;
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c: number;
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v: number;
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adjClose?: number | null;
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}
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export interface SymbolMeta {
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symbol: string;
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name?: string | null;
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sector?: string | null;
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industry?: string | null;
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exchange?: string | null;
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tickerKind: string;
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peers?: string[] | null;
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}
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export interface Snapshot {
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symbol: string;
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quote: Quote | null;
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candles: PriceCandle[] | null;
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sector: SymbolMeta | null;
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stale: { quote: boolean; candles: boolean; sector: boolean };
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}
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export interface AuthUser {
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userId: string;
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email?: string;
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complexity?: string;
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riskTolerance?: string;
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convexityPosture?: string;
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}
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async function parse<T>(res: Response): Promise<T> {
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const json = await res.json();
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if (json?.error) {
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const msg = json.error.message ?? `tRPC error ${json.error.data?.code ?? ""}`;
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throw new Error(typeof msg === "string" ? msg : "tRPC error");
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}
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return json.result.data as T;
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}
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async function trpcQuery<T>(procedure: string, input?: unknown): Promise<T> {
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const search = input ? `?input=${encodeURIComponent(JSON.stringify(input))}` : "";
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const res = await fetch(`/api/trpc/${procedure}${search}`, {
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headers: { "content-type": "application/json" },
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credentials: "include",
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});
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return parse<T>(res);
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}
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async function trpcMutate<T>(procedure: string, input: unknown): Promise<T> {
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const res = await fetch(`/api/trpc/${procedure}`, {
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method: "POST",
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headers: { "content-type": "application/json" },
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credentials: "include",
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body: JSON.stringify(input),
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});
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return parse<T>(res);
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}
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export const api = {
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market: { snapshot: (symbol: string) => trpcQuery<Snapshot>("market.snapshot", { symbol }) },
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auth: {
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signup: (email: string, password: string) => trpcMutate<{ userId: string }>("auth.signup", { email, password }),
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login: (email: string, password: string) => trpcMutate<{ userId: string }>("auth.login", { email, password }),
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logout: () => trpcMutate<{ ok: boolean }>("auth.logout", {}),
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me: () => trpcQuery<AuthUser | null>("auth.me"),
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},
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};
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