Extend supported fiat currencies to include Swiss Franc (CHF)

[baumea]

🔘 PR Type

• Enhancement

📜 Background

Previously, xverse-core supported only to compute the conversion rates for USD, EUR, CAD, CNY, ARS, KRW, HKD, JPY, SGD, GBP, BRL, RUB. This PR extends the support to Swiss Francs. In fact, the xverse.app api for the mainnet as well as for the testnet support Swiss Francs already:

curl 'https://api-testnet.xverse.app/v1/prices/btc/CHF'
curl 'https://api-3.xverse.app/v1/prices/btc/CHF'

🔄 Changes

Does this PR introduce a breaking change?

• Yes, Incompatible API changes
• No, Adds functionality (backwards compatible)
• No, Bug fixes (backwards compatible)

Changes:

• Changes were only made to types/currency.ts

Impact:

• Allows for other software, e.g., the xverse-web-extension, to compute the Swiss Francs conversion rates.

✅ Review checklist

Please ensure the following are true before merging:

• Code Style is consistent with the project guidelines.
• Code is readable and well-commented.
• No unnecessary or debugging code has been added.
• Security considerations have been taken into account.
• The change has been manually tested and works as expected.
• Breaking changes and their impacts have been considered and documented.
• Code does not introduce new technical debt or issues.

[victorkirov]

@baumea Thanks for submitting this PR. Sorry for the delay, I just saw it now. We'll try and push it in soon!