HIP-904 Add Outstanding Token Airdrops endpoint to REST API

[edwin-greene]

Problem

Add the outstanding airdrops endpoint to Rest-Java.

Solution

List outstanding airdrops:

/api/v1/accounts/{senderIdOrEvmAddress}/airdrops/outstanding

List of outstanding airdrops in the PENDING state. The primary use case is for the sender of the airdrop. All information returned to the requester will be queried from the token_airdrop table and should be performant based on the token_airdrop__sender_id index.
Input validation will be applied to the senderIdOrEvmAddress path parameter and the optional query parameters. An error code response of 400 will be returned if any parameters fail validation.

Response:

{
  "airdrops": [
    {
      "amount": 333,
      "receiver_id": "0.0.999",
      "sender_id": "0.0.222",
      "serial_number": null,
      "timestamp": {
        "from": "1111111111.111111111",
        "to": null
      },
      "token_id": "0.0.111"
    },
    {
      "amount": 555,
      "receiver_id": "0.0.999",
      "sender_id": "0.0.222",
      "serial_number": null,
      "timestamp": {
        "from": "1111111111.111111112",
        "to": null
      },
      "token_id": "0.0.444"
    },
    {
      "amount": null,
      "receiver_id": "0.0.999",
      "sender_id": "0.0.222",
      "serial_number": 888,
      "timestamp": {
        "from": "1111111111.111111113",
        "to": null
      },
      "token_id": "0.0.666"
    }
  ],
  "links": {
    "next": null
  }
}

Optional Filters

• limit - The maximum number of airdrops to return in the response. Defaults to 25 with a max of 100.
• order - The direction to sort the items in the response. Sorted by the token_airdrop__sender_id index. Can be asc or desc with a default of asc.
• receiver.id - The receiver account the outstanding airdrop was intended for. Supports eq, gt, gte, lt, and lte operators. Only one occurrence is allowed.
• serialnumber - The specific serial number associated with airdrop. Supports eq, gt, gte, lt, and lte operators. Only one occurrence is allowed.
• token.id - The token ID this airdrop is associated with. Supports eq, gt, gte, lt, and lte operators. Only one occurrence is allowed.

Alternatives

No response