Add decimal precision handling for amounts

[meshackyaro]

Description

Using JavaScript numbers for currency amounts causes floating-point precision errors.

Component

Backend

Difficulty

🟡 Medium

Tasks

• Use decimal.js or work in stroops
• Update amount calculations
• Add amount validation
• Test precision edge cases
• Document amount handling

Acceptance Criteria

• No floating-point errors
• Exact decimal arithmetic
• Amount handling documented

Estimated Time

2-3 days

[marimuthusanthosh]

Hi @meshackyaro , could you please assign this issue to me?

I can take this currency precision issue in the Backend. I’ll handle:

• Updating amount calculations using decimal.js or stroops
• Adding proper amount validation
• Testing floating-point precision edge cases
• Documenting the expected amount-handling approach

I’ll make sure the acceptance criteria around exact decimal arithmetic and avoiding floating-point errors are covered.