Powerball is a popular US lottery game with draws twice a week. For the purposes of this exercise, a Powerball lottery "ticket" includes one or more "picks". Each "pick" is a set of 5 integers (from 1-69) along with a 6th integer (the Powerball, from 1-26) that the user has chosen to play during a specific draw.
For example, a pick for the draw on 2017-11-09 might be:
02 14 19 21 61 25
The application's API accepts data for a lottery ticket, and respond with whether each pick has won, the prize won per-pick, and the total of all prizes won on the ticket.
The test end point used is:
https://games.api.lottery.com/api/v2.0/results?game=59bc2b6031947b9daf338d32
To calculate the prize, the prize matrix image below is used:
When the advertised annuity jackpot is less than or equal to the Major Jackpot Level, the multiplier will be either 2X, 3X, 4X, 5X or 10X.
When the advertised annuity jackpot is greater than the Major Jackpot Level, the multiplier will be either 2X, 3X, 4X or 5X.
The Major Jackpot Level is defined as "the level above which Powerball drawings will no longer include a Power Play of 10X." The Major Jackpot Level is currently $150,000,000.
The 10X multiplier is not available when the jackpot is above the Major Jackpot Level
This app requires:
- A Linux or MacOS Environment (Windows Untested)
- Node.js 8.9+
If you do not have node.js installed:
- Install NVM
- Install Node 8.9
nvm install 8.9 - Switch to Node 8.9
nvm use 8.9
From the checked-out application folder, run:
npm start
You should see output like this:
node index.js
App listening on port 3000
You can then hit the endpoint with POST:
with a REQUEST LIKE:
[
{
"message": "2 Win the Lotto!",
"game": "powerball",
"gameDate": "2018-04-01",
"powerPlay": true,
"line": [
{
"value": "8",
"type": "NUMBER"
},
{
"value": "4",
"type": "NUMBER"
},
{
"value": "2",
"type": "NUMBER"
},
{
"value": "5",
"type": "NUMBER"
},
{
"value": "1",
"type": "NUMBER"
},
{
"value": "71",
"type": "NUMBER",
"name": "Powerball",
"category": "EXTRA"
}
]
},
{
"message": "Win the Lotto!",
"game": "powerball",
"gameDate": "2018-04-01",
"powerPlay": false,
"line": [
{
"value": "8",
"type": "NUMBER"
},
{
"value": "24",
"type": "NUMBER"
},
{
"value": "52",
"type": "NUMBER"
},
{
"value": "55",
"type": "NUMBER"
},
{
"value": "61",
"type": "NUMBER"
},
{
"value": "21",
"type": "NUMBER",
"name": "Powerball",
"category": "EXTRA"
}
]
}
]
http://localhost:3000/api
You should see something like this:
{
"totalAmountWon": 50000000,
"results": [
{
"date": "2018-04-01",
"powerPlay": true,
"powerBall": "71",
"originalWhites": [
"8",
"4",
"2",
"5",
"1"
],
"matchedPowerBall": false,
"matchingNumbers": [
"8"
],
"amountWon": 0
},
{
"date": "2018-04-01",
"powerPlay": false,
"powerBall": "21",
"originalWhites": [
"8",
"24",
"52",
"55",
"61"
],
"matchedPowerBall": true,
"matchingNumbers": [
"8",
"24",
"52",
"55",
"61"
],
"amountWon": 50000000
}
]
}To shutdown the server simply send a ^C.
To run the existing (sample) tests simply use:
npm test
You should see output like this:
✔ app › App Environment
✔ app › App Base Path
✔ app › App Includes Error Handler Middleware
✔ controllers › index › Hello World Controller
✔ controllers › index › Fail Controller
✔ controllers › index › Not Found Controller
✔ middleware › errors › Error Handler Middleware
✔ middleware › errors › Error Handler for NotFound Case
✔ routes › routes › Router Setup
9 tests passed
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