feat: use crypto compare multi api for currency rate controller

[bergeron]

Explanation

Updates the currency rate controller to use the pricemulti endpoint of crypto compare. This allows us to fetch exchange rates for multiple native currencies in a single http request.

References

Changelog

@metamask/assets-controllers

• BREAKING: CurrencyRateController now accepts an array of native currencies as its polling input.
• BREAKING: RatesController now types the conversionRate and usdConversionRate in its state as number instead of string, to match what it was actually storing.

Checklist

• [ ] I've updated the test suite for new or updated code as appropriate
• [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [ ] I've highlighted breaking changes using the "BREAKING" category above as appropriate
• [ ] I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

[legobeat]

Would it be viable to make the public API less tightly coupled to Crypto Compare API?

Would make it less involved to make future changes and make it more flexible and robust at the same time.

Related: https://github.com/MetaMask/core/pull/4852/files#r1817508642

[bergeron]

Would it be viable to make the public API less tightly coupled to Crypto Compare API?

Can you explain what you're thinking? The crypto compare stuff is already behind a separate service with generic interfaces for fetchExchangeRate and fetchMultiExchangeRate.

[bergeron]

@metamaskbot publish-preview

[github-actions[bot]]

Preview builds have been published. See these instructions for more information about preview builds.

Expand for full list of packages and versions.

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