feat: add getErc20Balances helper TokenBalancesControllers

[salimtb]

Explanation

This change introduces a new getErc20Balances service function within the TokenBalancesController. The goal is to provide a reusable and isolated utility to fetch ERC-20 token balances for a given address and token list.

The service is intended to be used internally by the controller or other consumers needing direct access to raw ERC-20 balances, while abstracting away Web3 calls and error handling.

References

Changelog

@metamask/assets-controllers

UPDATE: Created getErc20Balances function within TokenBalancesController to support fetching ERC-20 token balances for a given address and token list. This modular service simplifies balance retrieval logic and can be reused across different parts of the controller.

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 communicated my changes to consumers by updating changelogs for packages I've changed, highlighting breaking changes as necessary
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

[salimtb]

@metamaskbot publish-preview

[github-actions]

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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