Invoice Data Type Changes

Author(s)

• Bishwanath Jana

Last Updated Date

2024-10-16

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Version History

Version	Date	Changes	Author
1.0	2024-10-16	Initial draft	Bishwanath Jana

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Feature Overview

Objective:
The goal of this feature is to update the invoice system's handling of payment-related data to use precise numeric types instead of rounding off values. This change is necessary because the current rounding method causes discrepancies in payment calculations.

Scope:
This change only affects payment-related fields that were previously rounded off due to double precision issues. Existing structures not related to payments will remain unchanged.

Dependencies:
(List any external dependencies, libraries, or other features that this feature depends on.)

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Requirements

1. Ensure that payment-related data uses precise numeric types to avoid rounding errors.
2. Maintain the integrity of the existing system by not modifying unrelated structures.
3. The feature must not impact non-payment-related functionality.
4. Ensure backward compatibility with existing systems that consume invoice data.

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Design Specifications

• UI/UX Design:
  No major UI changes are required. However, any fields displaying payment data should now reflect the precise values without rounding.

• API Interfaces:
  The API interfaces will remain the same, but the data types returned in payment-related fields will reflect numeric precision.

• Third-Party Integrations:
  Ensure that any integrations relying on payment data can handle the new precision without errors.

• Workflow:
  The workflow of the invoice creation, payment processing, and retrieval will stay the same. However, the calculations that previously resulted in rounding off values will now use precise numeric data types, ensuring accurate totals.

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Development Tasks & Estimates

No	Task Name	Estimate (Hours)	Dependencies	Notes
1	Update data models to use numeric types	2 hours	None
2	Modify API responses to ensure precision	2 hours	None
3	Integration testing	2 hours	Any integrations
4	Total	6 hours

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Testing & Quality Assurance

• Unit Tests:
  Unit tests will be updated to validate payment calculations with the new numeric types. These tests will ensure that no rounding occurs during payment-related calculations.

• Integration Tests:
  Integration tests will focus on verifying that external systems can still handle invoice data with the new precision.

• Acceptance Criteria:

  • Payment-related data is stored and processed as precise numeric values.
  • No rounding discrepancies appear in calculations.
  • Non-payment fields remain unaffected.

• Testing Tools:
  Standard testing tools such as xUnit and Moq for unit testing, along with postman or Swagger for API testing.

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Deployment Considerations

• Configuration Changes:
  None required for this feature, but ensure the database is configured to handle numeric data types where needed.

• Rollout Plan:
  This feature will be rolled out in a single release. Before deployment, ensure that all systems using the invoice API are tested for compatibility.

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Risks & Mitigations

Risk	Impact	Likelihood	Mitigation Strategy
Data type incompatibility	High	Low	Test third-party integrations thoroughly
Calculation errors	Medium	Medium	Ensure proper testing for payment fields
User confusion	Low	Low	Provide clear communication about changes

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Review & Approval

• Reviewer:
  Ayon Das

• Approval Date:
  2024-10-16

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Notes
This update focuses solely on correcting numeric precision issues for payment data. All other fields and functionalities remain unchanged.