DAT Javascript, Typescript Library ​

const manager = await DatCmsManager.builder()
    .uri("http://localhost:8088")
    //.intervalOff() // disable auto sync
    .intervalSeconds(60)
    .logger(console)
    .token("12345678901b")
    .build();

// manual sync
// await manager.sync();

// build() never throws on a failed first sync — it returns a manager with no
// certificates so a CMS outage cannot stop your app from starting.
// Ask for the reason instead:
const syncError = manager.lastError();
if (syncError && syncError.retry === "permanent") {
    // Retrying will not help — the token or the URL is wrong.
    console.error("fix the CMS config:", syncError.code);
}

let plain = "Unicode 유니코드 ユニコード 万国码 يونيكود यूनिकोड Юникод 🦄💻";
let secure = "Ciphertext 암호문 暗号文 密文 Шифротекст Texte chiffré Geheimtext نص مشفر सिफरपाठ 🔐";

const dat = await manager.issue(plain, secure);
console.log("dat : " + dat);

// parse dat
const payload = await manager.parse(dat);

const payloadPlain = payload.plain;
const payloadSecure = payload.secure;

console.log("payload plain : " + payloadPlain);
console.log("payload secure : " + payloadSecure);

import {DatCertificate, DatCrypto, DatInteger, DatManager, DatSignature} from "saro-dat";
import {Unixtime} from "infinite-unixtime";

const manager = new DatManager();

// (cid, issuanceStart, issuanceDuration, datTtl, signature, crypto)
const now = Unixtime.now().time;
manager.importCertificates([new DatCertificate(
    DatInteger.toCid(0), now - 10n, 3600n, 1800n,
    await DatSignature.generate("HMAC-SHA512-MFS"),
    await DatCrypto.generate("IV-AES256-GCM"),
)]);

let plain = "Unicode 유니코드 ユニコード 万国码 يونيكود यूनिकोड Юникод 🦄💻";
let secure = "Ciphertext 암호문 暗号文 密文 Шифротекст Texte chiffré Geheimtext نص مشفر सिफरपाठ 🔐";

const dat = await manager.issue(plain, secure);
console.log("dat : " + dat);

// parse dat
const payload = await manager.parse(dat);

const payloadPlain = payload.plain;
const payloadSecure = payload.secure;

console.log("payload plain : " + payloadPlain);
console.log("payload secure : " + payloadSecure);

import {DatError, DatErrorCodes} from "saro-dat";

async function verify(manager, dat) {
    try {
        return await manager.parse(dat);
    } catch (e) {
        if (!(e instanceof DatError)) throw e;

        switch (e.code) {
            case DatErrorCodes.TOKEN_EXPIRED:
                // Normal end of life. Send the client back to log in again.
                return refreshFlow();
            case DatErrorCodes.SIG_MISMATCH:
            case DatErrorCodes.CRYPTO_TAG_MISMATCH:
                // Forged or tampered. e.securityEvent is true for exactly these two.
                securityLog(e.code);
                return blockSession();
            default:
                // Malformed, unknown cid, ... — just reject the request.
                return reject(e.code);
        }
    }
}

// "transient" -> back off and retry | "permanent" -> fix config | "state" -> not an error
if (e.retry === "transient") {
    await backoff();
    return retry();
}