Error converting value {null} to type 'System.Int64'. Path 'payments[0].block.height'

Version Information

Software	Version(s)
NuGet Package	1.10.0

What is the expected behavior?

No error while convert webhook body to the object.

What is the actual behavior?

Error converting value {null} to type 'System.Int64'. Path 'payments[0].block.height'

Please provide a unit test that demonstrates the bug.

Webhook example to reproduce:

{
  "attempt_number": 1,
  "event": {
    "api_version": "2018-03-22",
    "created_at": "2019-12-19T16:18:40Z",
    "data": {
      "id": "foo",
      "code": "foo",
      "name": "foo",
      "pricing": {
        "usdc": {
          "amount": "1275.000000",
          "currency": "USDC"
        },
        "local": {
          "amount": "1275.00",
          "currency": "USD"
        },
        "bitcoin": {
          "amount": "0.17824340",
          "currency": "BTC"
        },
        "ethereum": {
          "amount": "9.982384000",
          "currency": "ETH"
        },
        "litecoin": {
          "amount": "31.90291505",
          "currency": "LTC"
        },
        "bitcoincash": {
          "amount": "6.76410515",
          "currency": "BCH"
        }
      },
      "logo_url": "foo",
      "metadata": {
        "DepositId": "111"
      },
      "payments": [
        {
          "block": {
            "hash": null,
            "height": null,
            "confirmations": 0,
            "confirmations_required": 1
          },
          "value": {
            "local": {
              "amount": "1274.67",
              "currency": "USD"
            },
            "crypto": {
              "amount": "0.17819718",
              "currency": "BTC"
            }
          },
          "status": "PENDING",
          "network": "bitcoin",
          "detected_at": "2019-12-19T16:18:40Z",
          "transaction_id": "foo"
        }
      ],
      "resource": "charge",
      "timeline": [
        {
          "time": "2019-12-19T16:18:11Z",
          "status": "NEW"
        },
        {
          "time": "2019-12-19T16:18:40Z",
          "status": "PENDING",
          "payment": {
            "network": "bitcoin",
            "transaction_id": "foo"
          }
        }
      ],
      "addresses": {
        "usdc": "foo",
        "bitcoin": "foo",
        "ethereum": "foo",
        "litecoin": "foo",
        "bitcoincash": "foo"
      },
      "created_at": "2019-12-19T16:18:11Z",
      "expires_at": "2019-12-19T17:18:11Z",
      "hosted_url": "https:\/\/commerce.coinbase.com\/charges\/foo",
      "description": "foo",
      "pricing_type": "fixed_price"
    },
    "id": "foo",
    "resource": "event",
    "type": "charge:pending"
  },
  "id": "foo",
  "scheduled_for": "2019-12-19T16:18:40Z"
}

Other notes on how to reproduce the issue?

Coinbase sends the 'height' null value only when webhook type is 'charge:pending'

Any possible solutions?

Change in Block class from public long Height { get; set; } to public long? Height { get; set; }

bchavez / Coinbase.Commerce