POST http://example.com/hook HTTP/1.1

Host: example.com
X-Komoju-Id: 6cul2yma626autvvxz2xre1qr
X-Komoju-Signature: 75e653443e6543ee4c4b0665c73a4818216c9464f4a3ac959bff5ebafc105693
X-Komoju-Event: payment.authorized
User-Agent: Komoju-Webhook
Content-Type: application/json
Accept-Encoding: gzip;q=1.0,deflate;q=0.6,identity;q=0.3
Accept: */*
{
  "id": "dv7ywuavew3n2meqsllj5bbob",
  "type": "payment.authorized",
  "resource": "event",
  "data": {
    "id": "8xz5cn01gkt37cz0myd98k2f1",
    "resource": "payment",
    "status": "authorized",
    "amount": 1000,
    "tax": 80,
    "customer": null,
    "payment_deadline": "2018-11-20T14:59:59Z",
    "payment_details": {
      "type": "bank_transfer",
      "email": "[email protected]",
      "order_id": "Y5236584956",
      "bank_name": "三井住友銀行",
      "account_branch_name": "ひなぎく",
      "account_number": "6",
      "account_type": "普通預金",
      "account_name": "株式会社DEGICA（カブシキガイシャ デジカ）",
      "instructions_url": "https://komoju.com/ja/instructions/8xz5cn01gkt37cz0myd98k2f1"
    },
    "payment_method_fee": 0,
    "total": 1080,
    "currency": "JPY",
    "description": null,
    "captured_at": null,
    "external_order_num": "123",
    "metadata": {
    },
    "created_at": "2018-11-13T06:19:49Z",
    "amount_refunded": 0,
    "locale": "ja",
    "refunds": [

    ],
    "refund_requests": [

    ]
  },
  "created_at": "2018-11-13T06:19:49Z"
}

POST http://example.com/hook HTTP/1.1

Host: example.com
X-Komoju-Id: 1lqjmj6k7li996cdiqxqqzf1k
X-Komoju-Signature: ee52defb62c1d48125741bfe92a13b6cbffc97b0b3a26b5cab582f766a4ae97e
X-Komoju-Event: ping
User-Agent: Komoju-Webhook
Content-Type: application/json
Accept-Encoding: gzip;q=1.0,deflate;q=0.6,identity;q=0.3
Accept: */*
{
  "id": "do33foclbroj52ib9whb6yh4m",
  "type": "ping",
  "resource": "event",
  "data": {
    "id": "bll40gxhuhcw19vor5kx55akw",
    "resource": "webhook",
    "url": "http://example.com/hook",
    "active": true,
    "event_list": [
      "ping",
      "payment.captured"
    ],
    "created_at": "2018-11-13T06:19:49Z"
  },
  "created_at": "2018-11-13T06:19:49Z"
}

require "sinatra"

WEBHOOK_SECRET_TOKEN = "keep it secret, keep it safe!"

post '/hook' do
  # NOTE: it's important to use the raw, unmodified request body here.
  # If you parse the body JSON and then re-encode, you might be unable to verify.
  request_body = request.body.read
  signature = OpenSSL::HMAC.hexdigest('sha256', WEBHOOK_SECRET_TOKEN, request_body)
  return 400 unless Rack::Utils.secure_compare(signature, request.env["HTTP_X_KOMOJU_SIGNATURE"])

  "Hello World"
end