W2-B-029 - `currencyConverter` calls `.toNumber()` on `string | Date | Decimal`

[likableai]

Severity: High | Area: backend/rates | Evidence: src/services/rates/currencyConverter.ts:96,167 — TS2339
Impact: Rate fields from Prisma Decimal columns are union-typed; calling .toNumber() fails to compile and may throw at runtime. Fix: Normalize the rate to Decimal before arithmetic; use Number() only for comparisons. Acceptance: Conversions work with string, Decimal, and Date rate rows.

[Gadflyxx]

@Gadflyxx has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer please assign this issue to my repo

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[samsonmbah002]

@samsonmbah002 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Good day. Please can i work on these issue.

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[drips-wave]

Congratulations, @samsonmbah002! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@samsonmbah002's PR #917 was approved and merged by @likableai.

🏆 @samsonmbah002: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (592 total points). Track your full progress on GrantFox.

👏 Great work, @samsonmbah002! Keep contributing to Pi-Defi-world.