/**
* Minimal fetch wrapper with timeout and retry for banking APIs.
*/
export interface FetchOptions {
method?: string;
headers?: Record<string, string>;
body?: string;
timeoutMs?: number;
retries?: number;
}
export async function httpFetch(
url: string,
opts: FetchOptions = {},
): Promise<unknown> {
const { method = "GET", headers, body, timeoutMs = 30000, retries = 1 } = opts;
let lastError: Error | undefined;
for (let attempt = 0; attempt < retries; attempt++) {
const controller = new AbortController();
const timer = setTimeout(() => controller.abort(), timeoutMs);
try {
const res = await fetch(url, {
method,
headers,
body,
signal: controller.signal,
});
clearTimeout(timer);
if (!res.ok) {
const text = await res.text().catch(() => "");
throw new Error(
`HTTP ${res.status} ${res.statusText}: ${text.slice(0, 200)}`,
);
}
return await res.json();
} catch (err) {
clearTimeout(timer);
lastError = err instanceof Error ? err : new Error(String(err));
// Don't retry on 4xx (client errors)
if (lastError.message.includes("HTTP 4")) break;
}
}
throw lastError!;
}
