Overview

The main objective of the billing module is to serve the Bill for all revenue Business services. To serve the Bill, Billing-Service requires demand. Demands will be prepared by Revenue modules and stored by billing based on which it will generate the Bill.

Pre-requisites

Prior Knowledge of Java/J2EE.
Prior Knowledge of Spring Boot.
Prior Knowledge of KAFKA
Prior Knowledge of REST APIs and related concepts like path parameters, headers, JSON, etc.
Prior knowledge of the demand-based systems.
Following services should be up and running:
- user
- MDMS
- Id-Gen
- URL-Shortening
- notification-sms

Key Functionalities

eGov billing service creates and maintains demands.
Generates bills based on demands.
push created and updated bill/demand to Kafka on specified topics
Updates the demands from payment when the collection service takes a payment.

Deployment Details

Deploy the latest image of the billing service available.

Configuration Details

In the MDMS data configuration, the following master data is needed for the functionality of the billing

MDMS

Business Service JSON

{
  "tenantId": "pb",
  "moduleName": "BillingService",
  "BusinessService": [
    {
      "businessService": "EXPENSE.ELECTRICITY_BILL",
      "code": "EXPENSE.ELECTRICITY_BILL",
      "collectionModesNotAllowed": [
        "DD"
      ],
      "partPaymentAllowed": true,
      "isAdvanceAllowed": false,
      "isVoucherCreationEnabled": true,
      "isActive": true,
      "type": "Adhoc"
    },
     {
      "businessService": "EXPENSE.SALARY",
      "code": "EXPENSE.SALARY",
      "collectionModesNotAllowed": [
        "DD"
      ],
      "partPaymentAllowed": true,
      "isAdvanceAllowed": false,
      "isVoucherCreationEnabled": true,
      "isActive": true,
      "type": "Adhoc"
    },
    {
      "businessService": "EXPENSE.OM",
      "code": "EXPENSE.OM",
      "collectionModesNotAllowed": [
        "DD"
      ],
      "partPaymentAllowed": true,
      "isAdvanceAllowed": false,
      "isVoucherCreationEnabled": true,
      "isActive": true,
      "type": "Adhoc"
    },
    {
      "businessService": "EXPENSE.MISC",
      "code": "EXPENSE.MISC",
      "collectionModesNotAllowed": [
        "DD"
      ],
      "partPaymentAllowed": true,
      "isAdvanceAllowed": false,
      "isVoucherCreationEnabled": true,
      "isActive": true,
      "type": "Adhoc"
    },
    {
      "businessService": "ws-services-calculation",
      "code": "WS",
      "collectionModesNotAllowed": [
        "DD",
        "CHEQUE",
        "CARD",
        "OFFLINE_NEFT",
        "OFFLINE_RTGS",
        "POSTAL_ORDER",
        "ONLINE"
      ],
      "partPaymentAllowed": true,
      "isAdvanceAllowed": false,
      "demandUpdateTime": 86400000,
      "isVoucherCreationEnabled": false,
      "billGineiURL" : "egov-searcher/bill-genie/waterbills/_get",
      "isBillAmendmentEnabled":true
    }
  ]
}

TAX-Head JSON

{
  "tenantId": "pb",
  "moduleName": "BillingService",
  "TaxHeadMaster": [
    {
      "category": "CHARGES",
      "service": "EXPENSE.ADVANCE",
      "name": "EXPENSE.ADVANCE_TAX",
      "code": "EXPENSE.ADVANCE_TAX",
      "isDebit": true,
      "isActualDemand": false,
      "order": "1",
      "isRequired": true
    },
    {
      "category": "CHARGES",
      "service": "EXPENSE.ELECTRICITY_BILL",
      "name": "EXPENSE.ELECTRICITY_BILL_TAX",
      "code": "20101",
      "isDebit": true,
      "isActualDemand": false,
      "order": "1",
      "isRequired": true
    },
    {
      "category": "CHARGES",
      "service": "EXPENSE.SALARY",
      "name": "Salary",
      "code": "20201",
      "isDebit": true,
      "isActualDemand": false,
      "order": "1",
      "isRequired": true
    },
    {
      "category": "CHARGES",
      "service": "EXPENSE.OM",
      "name": "O&M",
      "code": "20301",
      "isDebit": true,
      "isActualDemand": false,
      "order": "1",
      "isRequired": true
    },
    {
      "category": "CHARGES",
      "service": "EXPENSE.MISC",
      "name": "MISC",
      "code": "20401",
      "isDebit": true,
      "isActualDemand": false,
      "order": "1",
      "isRequired": true
    },
    {
      "category": "CHARGES",
      "service": "WS",
      "name": "Water Charges",
      "code": "10101",
      "isDebit": true,
      "isActualDemand": false,
      "order": "0",
      "isRequired": false,
      "IsBillamend": true
    },
    {
      "category": "CHARGES",
      "service": "WS",
      "name": "Water Charges - Arrears",
      "code": "10102",
      "isDebit": true,
      "isActualDemand": false,
      "order": "0",
      "isRequired": false,
      "IsBillamend": true
    },
    {
      "category": "TAX",
      "service": "WS",
      "name": "Rebate",
      "code": "WS_TIME_REBATE",
      "isDebit": true,
      "isActualDemand": false,
      "order": "0",
      "isRequired": false,
      "IsBillamend": false
    },
    {
      "category": "TAX",
      "service": "WS",
      "name": "Interest",
      "code": "WS_TIME_INTEREST",
      "isDebit": false,
      "isActualDemand": true,
      "order": "1",
      "isRequired": false,
      "IsBillamend": true
    },
    {
      "category": "TAX",
      "service": "WS",
      "name": "Water Cess",
      "code": "WS_WATER_CESS",
      "isDebit": false,
      "isActualDemand": true,
      "order": "2",
      "isRequired": false,
      "IsBillamend": true
    },
    {
      "category": "PENALTY",
      "service": "WS",
      "name": "Penalty",
      "code": "10201",
      "isDebit": false,
      "isActualDemand": true,
      "order": "3",
      "isRequired": false,
      "IsBillamend": true
    },
    {
      "category": "TAX",
      "service": "WS",
      "name": "Round Off",
      "code": "WS_Round_Off",
      "isDebit": false,
      "isActualDemand": true,
      "order": "4",
      "isRequired": false,
      "IsBillamend": false
    },
    {
      "category": "TAX",
      "service": "WS",
      "name": "Water adhoc rebate",
      "code": "WS_TIME_ADHOC_REBATE",
      "isDebit": false,
      "isActualDemand": true,
      "order": "5",
      "isRequired": false,
      "IsBillamend": false
    },
    {
      "category": "TAX",
      "service": "WS",
      "name": "Water adhoc penalty",
      "code": "WS_TIME_ADHOC_PENALTY",
      "isDebit": false,
      "isActualDemand": true,
      "order": "6",
      "isRequired": false,
      "IsBillamend": false
    },
    {
      "category": "ADVANCE_COLLECTION",
      "service": "WS",
      "name": "Ws advance carry forward",
      "code": "WS_ADVANCE_CARRYFORWARD",
      "isDebit": true,
      "isActualDemand": false,
      "order": "0",
      "isRequired": false,
      "IsBillamend": false
    },
    {
      "category": "CHARGES",
      "service": "WS",
      "name": "Water Amendment Charges",
      "code": "WS_AMENDMENT_CHARGES",
      "isDebit": true,
      "isActualDemand": false,
      "order": "3",
      "isRequired": false,
      "IsBillamend": true
    }
  ]
}

Tax-Period JSON

{
  "tenantId": "pb",
  "moduleName": "BillingService",
  "TaxPeriod": [
    {
      "fromDate": 1554076799000,
      "toDate": 1585679399000,
      "periodCycle": "ANNUAL",
      "service": "PT",
      "code": "PTAN2019",
      "financialYear": "2019-20"
    },
    {
      "fromDate": 1522540800000,
      "toDate": 1554076799000,
      "periodCycle": "ANNUAL",
      "service": "PT",
      "code": "PTAN2018",
      "financialYear": "2018-19"
    },
    {
      "fromDate": 1491004800000,
      "toDate": 1522540798000,
      "periodCycle": "ANNUAL",
      "service": "PT",
      "code": "PTAN2017",
      "financialYear": "2017-18"
    },
    {
      "fromDate": 1459468800000,
      "toDate": 1491004799000,
      "periodCycle": "ANNUAL",
      "service": "PT",
      "code": "PTAN2016",
      "financialYear": "2016-17"
    },
    {
      "fromDate": 1522540800000,
      "toDate": 1554076799000,
      "periodCycle": "ANNUAL",
      "service": "TL",
      "code": "TLAN2018",
      "financialYear": "2018-19"
    }
  ]
}


bs.businesscode.demand.updateurl	{ "WS":"http://ws-calculator:8080/ws-calculator/waterCalculator/_updatedemand", "TL":"" }	Each module’s application calculator should provide its own update URL. if not present then new bill will be generated without making any changes to the demand.
bs.bill.billnumber.format	BILLNO-{module}-[SEQ_egbs_billnumber{tenantid}]	IdGen format for bill number
`bs.amendment.idbs.bill.billnumber.format`	`BILLNO-{module}-[SEQ_egbs_billnumber{tenantid}]`
`is.amendment.workflow.enabled`	`true/false`	enable disable workflow of bill amendment
`kafka.mgramseva.create.demand`	`mgramseva-create-demand`	topic name to push demand created, to be consumed by mgramseva adaptor
`kafka.mgramseva.update.demand`	`mgramseva-update-demand`	topic name to push demand updated, to be consumed mgram sevaadaptor
`kafka.mgramseva.create.bill`	`mgramseva-create-bill`	topic name to push bill created, to be consumed mgram seva
`kafka.mgramseva.update.bill`	`mgramseva-update-bill`	topic name to push bill updated, to be consumed mgram seva

Integration

Integration Scope

Billing service can be integrated with any organization or system that wants a demand-based payment system.

Integration Benefits

Easy to create and simple process of generating bills from demands
The amalgamation of bills period-wise for a single entity like Water connection.
Amendment of bills in case of legal requirements.

Steps to Integration

Customers can create a demand using the /demand/_create
Organization or System can search the demand using /demand/_searchendpoint
Once the demand is raised the system can call /demand/_update endpoint to update the demand as per need.
Bills can be generated using, which is a self-managing API that generates a new bill only when the old one expires /bill/_fetchbill.
Bills can be searched using /bill/_search.
Amendment facility can be used in case of a legal issue to add values to existing demands using /amendment/_create and /amendment/_update can be used to cancel the created ones or update workflow if configured.

Interaction Diagram

Interaction Diagram V1.1

Reference Docs

Doc Links

Title	Link
Id-Gen service
url-shortening
MDMS

API List

Title	Link
/demand/_create, _update, _search	https://www.getpostman.com/collections/900d99a85d083fb2d377
/bill/_fetchbill, _search	https://www.getpostman.com/collections/900d99a85d083fb2d377
/amendment/_create, _update	https://www.getpostman.com/collections/b195d3b1d354c767b6bd

Apportioning

What is apportioning?

Adjusting the receivable amount with the individual tax head.

Types of apportioning V1.1:

Default order based apportioning(Based on apportioning order adjust the received amount with each tax head).V1.1

Types of apportioning V1.2: (TBD)

Proportionate based apportioning (Adjust total receivable with all the tax head equally)
Order & Percentage based apportioning(Adjust total receivable based on order and the percentage which is defined for each tax head).

Principle of Apportioning

The basic principle of apportioning is, if the full amount is paid for any bill then each individual tax head should get nullify with their corresponding adjusted amount.

Example:
Case 1: When there are no arrears all tax heads belong to their current purpose:

TaxHead	Amount	Order	Full Payment(2000)	Partial Payment1(1500)	Partial payment2(750)	Partial payment2 with rebate(500)

WS_CHARGE	1000	6	1000	1000	750	750
AdjustedAmt			1000	-250	-750	-750
RemainingAMTfromPayableAMT			0	0	0	0

Penality	500	5	500	500
AdjustedAmt			500	-500
RemainingAMTfromPayableAMT			1000	250


Interest	500	4	500	500
AdjustedAmt			500	-500
RemainingAMTfromPayableAMT			1500	750

Cess	500	3	500	500
AdjustedAmt			500	-500
RemainingAMTfromPayableAMT			2000	1250

Exm	-250	1	-250	-250
AdjustedAmt			-250	250
RemainingAMTfromPayableAMT			2250	1750

Rebate	-250	2	-250			-250
AdjustedAmt			-250			250
RemainingAMTfromPayableAMT			2500			750

Case 2: Apportioning with two years of arrear:
If the current financial year is 2014-15. Below are the demands

TaxHead	Amount	TaxPeriodFrom	TaxPeriodTo	Order	Purpose

WS_CHARGE	1000	2014	2015	6	Current
AdjustedAmt	0

Penality	500	2014	2015	5	Current
AdjustedAmt	0

Interest	500	2014	2015	4	Current
AdjustedAmt	0

Cess	500	2014	2015	3	Current
AdjustedAmt	0

Exm	-250	2014	2015	1	Current
AdjustedAmt	0

if any payment is not done, and we generating demand in 2015-16 then the demand structure will as follows:

TaxHead	Amount	TaxPeriodFrom	TaxPeriodTo	Order	Purpose

WS_CHARGE	1000	2014	2015	6	Arrear
AdjustedAmt	0

WS_CHARGE	1500	2015	2016	6	Current
AdjustedAmt	0

Penality	600	2014	2015	5	Arrear
AdjustedAmt	0

Penalty	500	2015	2016	5	Current
AdjustedAmt	0

Interest	500	2014		4	Arrear
AdjustedAmt	0

Cess	500	2014		3	Arrear
AdjustedAmt	0

Exm	-250	2014		1	Arrear
AdjustedAmt	0

eGov Knowledge Base

mGramSeva - Billing Service