SDK @zentto/kyc-sdk

@zentto/kyc-sdk es el cliente oficial de Zentto KYC para Node y browser. Envuelve la API REST (/v1/...), añade reintentos con backoff, timeout y manejo de errores tipados.

Instalación

Paquete privado (requiere acceso al scope @zentto/*):

npm install @zentto/kyc-sdk

Configuración del cliente

import { ZenttoKyc } from "@zentto/kyc-sdk";

const kyc = new ZenttoKyc({
  apiKey: process.env.KYC_API_KEY,   // zkyc_... (server-to-server)
  baseUrl: "https://kyc.zentto.net", // default
  timeout: 30000,                    // ms, default 30000
  maxRetries: 3,                     // default 3
});

Opción	Tipo	Default	Descripción
apiKey	string	—	API key zkyc_... para auth server-to-server. Opcional si se usan cookies en browser.
baseUrl	string	https://kyc.zentto.net	URL base del servicio.
timeout	number	30000	Timeout por request en ms.
maxRetries	number	3	Reintentos con backoff exponencial (no reintenta errores 4xx).
withCredentials	boolean	true si no hay apiKey	Envía cookies httpOnly (uso browser/dashboard).

En browser, sin exponer la API key:

const kyc = new ZenttoKyc({ withCredentials: true });

Todas las respuestas incluyen ok: boolean. Los métodos devuelven el JSON de la API tal cual ({ ok, session }, { ok, result }, etc.).

Uploads: FileInput

Los métodos multipart (documentos y biometría) reciben archivos como FileInput:

interface FileInput {
  data: Uint8Array | ArrayBuffer | Blob;
  filename: string;
  contentType?: string;
}

En Node (Buffer es un Uint8Array):

import { readFile } from "node:fs/promises";

const front: FileInput = {
  data: await readFile("./front.jpg"),
  filename: "front.jpg",
  contentType: "image/jpeg",
};

En browser (File/Blob de un <input type="file">):

const file = input.files[0]; // File extiende Blob
const front: FileInput = { data: file, filename: file.name, contentType: file.type };

kyc.sessions

Método	Firma	Endpoint
create	create(opts?: CreateSessionOptions)	POST /v1/sessions
get	get(id: string)	GET /v1/sessions/:id
list	list(opts?: ListSessionsOptions)	GET /v1/sessions
delete	delete(id: string)	DELETE /v1/sessions/:id
pending	pending()	GET /v1/sessions/pending
decide	decide(id: string, opts: DecideSessionOptions)	POST /v1/sessions/:id/decision
share	share(id: string)	POST /v1/sessions/:id/share
import	import(shareToken: string)	POST /v1/sessions/import
createWorkflow	createWorkflow(opts: CreateWorkflowOptions)	POST /v1/sessions/workflows
listWorkflows	listWorkflows()	GET /v1/sessions/workflows
getWorkflow	getWorkflow(id: string)	GET /v1/sessions/workflows/:id
updateWorkflow	updateWorkflow(id: string, opts: UpdateWorkflowOptions)	PATCH /v1/sessions/workflows/:id
deleteWorkflow	deleteWorkflow(id: string)	DELETE /v1/sessions/workflows/:id

const { session } = await kyc.sessions.create({
  features: ["id", "liveness", "face_match"],
});
const detail = await kyc.sessions.get(session.id);
const { sessions, total } = await kyc.sessions.list({ status: "approved", limit: 20 });

kyc.documents

Método	Firma	Endpoint
idVerification	idVerification(opts: IdVerificationOptions)	POST /v1/documents/id-verification
proofOfAddress	proofOfAddress(opts: ProofOfAddressOptions)	POST /v1/documents/poa
databaseValidation	databaseValidation(opts: DatabaseValidationOptions)	POST /v1/documents/database-validation

const res = await kyc.documents.idVerification({
  sessionId,
  frontImage: { data: frontBuf, filename: "front.jpg", contentType: "image/jpeg" },
  backImage: { data: backBuf, filename: "back.jpg", contentType: "image/jpeg" },
});

kyc.biometrics

Método	Firma	Endpoint
liveness	liveness(opts: LivenessOptions)	POST /v1/biometrics/liveness
faceMatch	faceMatch(opts: FaceMatchOptions)	POST /v1/biometrics/face-match
ageEstimation	ageEstimation(opts: AgeEstimationOptions)	POST /v1/biometrics/age
faceSearch	faceSearch(opts: FaceSearchOptions)	POST /v1/biometrics/face-search
faceIndex	faceIndex(opts: FaceIndexOptions)	POST /v1/biometrics/face-search/index

await kyc.biometrics.liveness({ sessionId, image: { data: buf, filename: "selfie.jpg" } });
await kyc.biometrics.faceMatch({
  sessionId,
  userImage: { data: selfie, filename: "selfie.jpg" },
  refImage: { data: front, filename: "front.jpg" },
});

kyc.aml

Método	Firma	Endpoint
screen	screen(opts: AmlScreenOptions)	POST /v1/aml/screen

const { match, score, hits } = await kyc.aml.screen({
  fullName: "John Doe",
  entityType: "person",
});

kyc.kyb

Método	Firma	Endpoint
check	check(opts: KybCheckOptions)	POST /v1/kyb
get	get(id: string)	GET /v1/kyb/:id
list	list()	GET /v1/kyb

const { check } = await kyc.kyb.check({ companyName: "Acme Inc", country: "us" });

kyc.webhooks

Método	Firma	Endpoint
create	create(opts: CreateWebhookOptions)	POST /v1/webhooks
list	list()	GET /v1/webhooks
delete	delete(id: string)	DELETE /v1/webhooks/:id
test	test(id: string)	POST /v1/webhooks/:id/test
deliveries	deliveries(id: string)	GET /v1/webhooks/:id/deliveries

const { secret } = await kyc.webhooks.create({
  url: "https://miapp.com/kyc/webhook",
  events: ["session.completed", "session.declined", "session.review"],
});

kyc.keys

Método	Firma	Endpoint
create	create(opts?: CreateApiKeyOptions)	POST /v1/keys
list	list()	GET /v1/keys
revoke	revoke(id: string)	DELETE /v1/keys/:id

Manejo de errores

El SDK lanza errores tipados ante fallos de la API o de red:

Error	Cuándo
ZenttoKycError	La API devolvió un error (statusCode >= 400) o el request falló. Expone statusCode y response.
ZenttoKycTimeoutError	El request superó el timeout configurado (extiende ZenttoKycError, statusCode = 0).

Los errores 4xx no se reintentan; los 5xx y los de red se reintentan con backoff exponencial hasta maxRetries.

import { ZenttoKyc, ZenttoKycError, ZenttoKycTimeoutError } from "@zentto/kyc-sdk";

try {
  const { session } = await kyc.sessions.create({ features: ["id"] });
} catch (err) {
  if (err instanceof ZenttoKycTimeoutError) {
    // request superó el timeout
  } else if (err instanceof ZenttoKycError) {
    console.error(err.statusCode, err.response?.error);
  } else {
    throw err;
  }
}