52 lines
1.4 KiB
TypeScript
52 lines
1.4 KiB
TypeScript
import useSWRMutation from "swr/mutation";
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import { useState } from "react";
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import type { CaptchaVerificationRawResponse, CaptchaSessionRawResponse } from "@cvsa/backend";
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import { fetcher } from "@/lib/net";
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import { computeVdfInWorker } from "@/lib/vdf";
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interface UseCaptchaOptions {
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backendURL: string;
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route: string;
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}
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export function useCaptcha({ backendURL, route }: UseCaptchaOptions) {
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const fullUrl = `${backendURL}/captcha/session`;
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const [isUsed, setIsUsed] = useState(false);
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const { trigger, data, isMutating, error } = useSWRMutation<CaptchaVerificationRawResponse, Error>(
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fullUrl,
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async (url: string) => {
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const sessionRes = await fetcher<CaptchaSessionRawResponse>(url, {
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method: "POST",
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headers: {
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"Content-Type": "application/json"
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},
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data: { route }
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});
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const { g, n, t, id } = sessionRes;
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if (!g || !n || !t || !id) {
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throw new Error("Missing required CAPTCHA parameters");
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}
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const ans = await computeVdfInWorker(BigInt(g), BigInt(n), BigInt(t));
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const resultUrl = new URL(`${backendURL}/captcha/${id}/result`);
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resultUrl.searchParams.set("ans", ans.result.toString());
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const result = await fetcher<CaptchaVerificationRawResponse>(resultUrl.toString());
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setIsUsed(false);
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return result;
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}
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);
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return {
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startCaptcha: trigger,
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captchaResult: data,
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isLoadingCaptcha: isMutating,
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captchaError: error,
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captchaUsed: isUsed,
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setCaptchaUsedState: setIsUsed
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};
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}
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