TripSplit-Backend

A bill spliting application, uses a greedy algorithm to give the min number of transactions to resolve the expenses, also reduces the complexity.

Made Using Spring Boot with fully scalable code, JWT authentication used to verify the user, database used AWS RDS.

Frontend : https://tripsplits.netlify.app/register

Required request body

• UserLogin

{
    "username":	string,
    "password": string,
}

• User Register

{
    "userFirstName":	string,
    "userLastName":	string,
    "userName": string,
    "userPassword":	string,
    "userMatchingPassword": string
}

• Group

{
    "grpName":	string,
    "grpType":	string,
    "grpBudget": Long,
    "grpUser":	List<User>,
}

• Expense

{
    "expName":	string,
    "expAmt":	Long,
    "expPaidBy": Long,
    "usrSplitBtw":	List<User>,
    "expGrp": Group
}

Examples

• User

Endpoint:
user/register
Request Boddy:

{
   "userFirstName":"aarhan",
   "userLastName":"khan",
   "userName":"bdab",
   "userPassword":"hello123",
   "userMatchingPassword":"hello123"
}

Response:

{
  "jwtToken": "eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJiZGFiIiwiZXhwIjoxNjYzNzgwNTM1LCJpYXQiOjE2NjM3NjI1MzV9.jyxoG1RFcT9jNrDSnbYuKo7I0zUob8M- pJphmiUl7i61aTny_EZ0LtfZBQhqA-WgsblY240QHC92LWxCzf3nrA"
}

• Expense

Endpoint:
expense/create
Request Body:

{
   "expName":"Bus",
   "expAmt":60,
   "expPaidBy":1,
   "usrSplitBtw":[{"id":2}],
   "expGrp":
   {
       "id": 1,
       "groupName": "Shimla",
       "groupBudget": 10000,
       "groupType": "trip"
   }
}

Response:

{
  "id": 2,
  "expName": "Bus",
  "expAmt": 60,
  "expPaidBy": 1,
  "expGrp": {
      "id": 1,
      "groupName": "Shimla",
      "groupBudget": 10000,
      "groupType": "trip"
  }
}

• FinalSplit

Endpoint:
FinalSplit/{groupId}
Reponse:

[
    {
        "finalPayTo": 1,
        "finalPayBy": 2,
        "finalAmt": 60.0,
        "finalSplitGrp": {
            "id": 1,
            "groupName": "Shimla",
            "groupBudget": 10000,
            "groupType": "trip"
        }
    }
]