$ go build
$ ./fetch-exercise

Starting server at port 8080

curl -H "Content-Type: application/json" -X POST -d '{ "payer": "DANNON", "points": 1000, "timestamp": "2020-11-02T14:00:00Z" }' http://localhost:8080/add_transaction

curl -H "Content-Type: application/json" -X POST -d '{ "payer": "UNILEVER", "points": 200, "timestamp": "2020-10-31T11:00:00Z" }' http://localhost:8080/add_transaction

curl -H "Content-Type: application/json" -X POST -d '{ "payer": "DANNON", "points": -200, "timestamp": "2020-10-31T15:00:00Z" }' http://localhost:8080/add_transaction

curl -H "Content-Type: application/json" -X POST -d '{ "payer": "MILLER COORS", "points": 10000, "timestamp": "2020-11-01T14:00:00Z" }' http://localhost:8080/add_transaction

curl -H "Content-Type: application/json" -X POST -d '{ "payer": "DANNON", "points": 300, "timestamp": "2020-10-31T10:00:00Z" }' http://localhost:8080/add_transaction

{"message":"201 Created"}
{"message":"201 Created"}
{"message":"201 Created"}
{"message":"201 Created"}
{"message":"201 Created"}

curl -H "Content-Type: application/json" -X POST -d '{ "points": 5000 }' http://localhost:8080/spend_points

{
  "spent_points": [
    {
      "payer": "DANNON",
      "points": -100
    },
    {
      "payer": "UNILEVER",
      "points": -200
    },
    {
      "payer": "MILLER COORS",
      "points": -4700
    }
  ]
}

curl -H "Content-Type: application/json" http://localhost:8080/points

{
  "points": {
    "DANNON": 1000,
    "MILLER COORS": 5300,
    "UNILEVER": 0
  }
}