Fraud Detection Service

Tools and Technology

• SpringBoot
• H2 In-Memory Database
• LiquiBase
• Log4j2
• Postman

API Endpoints

Evaluate Fraud

[POST] [http://localhost:8080/evaluateFraud]

Evaluate Fraud on Requested Transaction by Applying Fraud Rules

• Request must use content-type: application/json
• The [POST] request example is mentioned below:

    {
      "amount":600,
      "currency":"EUR",
      "terminalId" : "123",
      "merchand" : "KFC",
      "terminalThreatScore" : "80"
    }

Response

• 200 OK: a JSON response is returned containing fraud evaluation result.

    {
      "status": "H",
      "message": "High",
      "fraudScore": "75.0"
    }

Add Operational Fraud Rule

[POST] [http://localhost:8080/operationalrules/addFraudRule]

Add Fraud Rules in Database

• Request must use content-type: application/json
• The [POST] request example is mentioned below:

    {
        "merchant": {
          "id": 1,
          "name": "KFC"
        },
        "fraudParameterApi": {
          "id": 1
        },
        "entity": {
          "id": 1
        },
        "operator": {
          "id": 3
        },
        "fraudRuleName": "MaxTransAmount",
        "fraudScore": 33,
        "terminalThreadThreshold": 45,
        "fraudCriteriaValue1": "30",
        "exchangeCode": "ABC",
        "toCurrCode": "USD"
    }

Response

• 200 OK: a JSON response is returned containing success response
• 400 BAD REQUEST: : a JSON response is returned containing request violation details

Update Operational Fraud Rule

[POST] [http://localhost:8080/operationalrules/updateFraudRule]

Updare Fraud Rules Details from Database

• Request must use content-type: application/json
• The [POST] request example is mentioned below:

    {
        "merchant": {
          "id": 1,
          "name": "KFC"
        },
        "fraudRuleName": "MaxTransAmount",
        "fraudScore": 33,
    }

Response

• 200 OK: a JSON response is returned containing success response
• 400 BAD REQUEST: : a JSON response is returned containing request violation details

Delete Operational Fraud Rule

[POST] [http://localhost:8080/operationalrules/deleteFraudRule]

Delete Fraud Rules from Database

• Request must use content-type: application/json
• The [POST] request example is mentioned below:

    {
        "merchant": {
          "id": 1,
          "name": "KFC"
        },
        "fraudRuleName": "MaxTransAmount"
    }

Response

• 200 OK: a JSON response is returned containing success response
• 400 BAD REQUEST: : a JSON response is returned containing request violation details