Zoi ID で開発する

curl https://kyc.zoi.network/v1/partner/sessions \
  -H "Authorization: Bearer $ZOI_ID_PARTNER_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: signup-user_42" \
  -d '{ "externalUserId": "user_42", "level": "standard", "appId": "com.example.app" }'

POST /v1/partner/sessions
Authorization: Bearer <partner key>
Content-Type: application/json
Idempotency-Key: 6f1c2a9e-signup-42

{
  "externalUserId": "user_42",
  "level": "standard",
  "locale": "en",
  "appId": "com.example.app"
}

200 OK
{
  "sessionId": "ses_...",
  "clientToken": "...",
  "clientTokenExpiresAt": 1767225600000,
  "status": "created",
  "apiBaseUrl": "https://kyc.zoi.network",
  "resumed": false
}

POST /v1/partner/sessions
Authorization: Bearer <partner key>
Content-Type: application/json
Idempotency-Key: edd-user_42-2026-11

{
  "externalUserId": "user_42",
  "appId": "com.example.app",
  "requirements": ["source_of_funds", "source_of_wealth"],
  "reuseIdentity": true,
  "fundsPolicy": { "evidence": "required" }
}

// No active identity for user_42:
409 { "error": { "code": "step_not_allowed", ... } }

"session": {
  "id": "ses_...",
  "status": "approved",
  "requirements": ["address", "source_of_funds"],
  "reusesIdentity": false,
  "address": {
    "verified": true,
    "method": "signed_pdf",
    "evidenceLevel": "high",
    "documentType": "bank_statement",
    "documentDate": "2026-10-14",
    "verifiedAt": 1767225600000,
    "country": "DE",
    // scope "address"
    "address": { "line1": "Musterstrasse 12", "city": "Berlin", "postalCode": "10115", "country": "DE" }
  },
  "funds": {
    "kinds": ["source_of_funds"],
    "evidenceLevel": "medium",
    "reviewed": true,
    "documentCount": 2,
    "verifiedAt": 1767225600000,
    // scope "financial_data"
    "answers": {
      "employmentStatus": "employed",
      "income": { "min": 50000, "max": 100000, "currency": "EUR" },
      "sources": ["salary", "savings"],
      ...
    },
    "documents": [
      { "documentType": "payslip", "documentDate": "2026-10-31", "amount": 5200, "currency": "EUR",
        "signature": "valid", "signedByKnownIssuer": true, "nameMatch": "match", "findings": [], ... },
      ...
    ],
    "findings": []
  }
}

POST /v1/partner/sessions
Authorization: Bearer <partner key>
Content-Type: application/json

{
  "externalUserId": "user_42",
  "level": "standard",
  "locale": "en",
  "appId": "com.example.app",
  "redirectUrl": "https://example.com/kyc/done"
}

200 OK
{
  "sessionId": "ses_...",
  "clientToken": "...",
  "verificationUrl": "https://kyc.zoi.network/verify/#token=...&lang=en",
  ...
}

// Sent to each bridge that exists:
//   window.ReactNativeWebView.postMessage(JSON string)
//   window.webkit.messageHandlers.zoiId.postMessage(object)
//   window.ZoiIdAndroid.postMessage(JSON string)
//   window.opener.postMessage(object, "<origin of your redirectUrl>")
//     (popups only, and only when the session has a redirectUrl)
{
  "source": "zoi-id",
  "type": "finished",        // or "cancelled"
  "sessionId": "ses_...",
  "status": "processing"     // the session status at that moment
}

// Then, if redirectUrl was set (the page uses the one stored with the
// session, never one from the address bar):
https://example.com/kyc/done?zoiIdSession=ses_...&zoiIdStatus=processing

POST <your webhook URL>
Zoi-Id-Signature: t=1767225600,v1=5f2b...e9

{
  "v": 1,
  "eventId": "evt_...",
  "type": "identity.suspended",
  "createdAt": 1767225600000,
  "object": "identity",
  "externalUserId": "user_42",
  "identity": {
    "identityId": "idn_...",
    "revision": 7,
    "status": "suspended",
    "level": "standard",
    "verifiedAt": 1764547200000,
    "validUntil": 1859155200000,
    "ageOver18": true,
    "captureMethod": "nfc"
  }
}

import { createHmac, timingSafeEqual } from "node:crypto";

const TOLERANCE_SECONDS = 300;

export function verifyZoiIdSignature(
  rawBody: string,
  header: string | null,
  secret: string,
  nowSeconds = Math.floor(Date.now() / 1000),
): boolean {
  if (!header) return false;

  let t: string | undefined;
  const signatures: Buffer[] = [];
  for (const part of header.split(",")) {
    const [key, value] = part.trim().split("=");
    if (!value) continue;
    if (key === "t") t = value;
    if (key === "v1" && /^[0-9a-f]+$/i.test(value)) signatures.push(Buffer.from(value, "hex"));
  }
  if (!t || !/^\d+$/.test(t) || signatures.length === 0) return false;
  if (Math.abs(nowSeconds - Number(t)) > TOLERANCE_SECONDS) return false;

  const expected = createHmac("sha256", secret).update(`${t}.${rawBody}`).digest();
  return signatures.some((sig) => sig.length === expected.length && timingSafeEqual(sig, expected));
}

// Example handler: read the raw body first, parse JSON only after the check.
export async function POST(request: Request) {
  const rawBody = await request.text();
  const ok = verifyZoiIdSignature(rawBody, request.headers.get("Zoi-Id-Signature"), process.env.ZOI_ID_WEBHOOK_SECRET!);
  if (!ok) return new Response("bad signature", { status: 400 });

  const event = JSON.parse(rawBody);
  // Store event.eventId to skip duplicates, then apply it if the revision is newer.
  return new Response(null, { status: 204 });
}

package zoiid

import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/hex"
	"strconv"
	"strings"
	"time"
)

const toleranceSeconds = 300

// VerifySignature checks the Zoi-Id-Signature header against the raw body.
func VerifySignature(rawBody []byte, header, secret string, now time.Time) bool {
	var t string
	var sigs [][]byte
	for _, part := range strings.Split(header, ",") {
		key, value, ok := strings.Cut(strings.TrimSpace(part), "=")
		if !ok || value == "" {
			continue
		}
		switch key {
		case "t":
			t = value
		case "v1":
			if b, err := hex.DecodeString(value); err == nil {
				sigs = append(sigs, b)
			}
		}
	}
	ts, err := strconv.ParseInt(t, 10, 64)
	if err != nil || len(sigs) == 0 {
		return false
	}
	if d := now.Unix() - ts; d > toleranceSeconds || d < -toleranceSeconds {
		return false
	}

	mac := hmac.New(sha256.New, []byte(secret))
	mac.Write([]byte(t + "."))
	mac.Write(rawBody)
	expected := mac.Sum(nil)
	for _, sig := range sigs {
		if hmac.Equal(sig, expected) {
			return true
		}
	}
	return false
}

POST /v1/partner/sessions/ses_.../fraud-reports
Authorization: Bearer <partner key>
Content-Type: application/json
Idempotency-Key: chargeback-8812

{
  "status": "confirmed_fraud",
  "category": "impostor",
  "note": "Chargeback on the first deposit"
}

201 Created
{
  "id": "flb_...",
  "sessionId": "ses_...",
  "status": "confirmed_fraud",
  "category": "impostor",
  "noteKept": true,
  "createdAt": 1767225600000
}