chore: update accounts api v6 endpoint response - #9911
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Explanation
Update accounts api v6 endpoint with the new response format (breaking change) and any associated code.
Preview PRs:
MetaMask/metamask-mobile#35091
MetaMask/metamask-extension#45666
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High Risk
Breaking change to Accounts API v6 response types used for token balances and DeFi positions. Incorrect parsing could drop balances or overwrite DeFi state while accounts are still indexing.
Overview
Aligns Accounts API v6 types and consumers with the live flat
/v6/multiaccount/balancespayload.@metamask/core-backend(breaking):V6BalancesResponse.accountsis replaced by a flatbalancesarray. EachV6BalanceItemnow carriesaccountId,object(token|defi), andtype.processingDefiPositionsis a response-level CAIP-10 account-ID list (DeFi rows for those accounts are omitted until indexing finishes).V6AccountBalancesEntryis removed, andprotocolIconUrlis optional.Consumers:
AccountsApiDataSourcereads token rows from the flat list (object === 'token').DeFiPositionsControllerV2polls whileprocessingDefiPositionsis non-empty so partial responses cannot wipe still-indexing accounts;groupDeFiPositionsV6seeds empty lists from the request-account map and defaults a missing protocol icon to''.Reviewed by Cursor Bugbot for commit b5a8d2e. Bugbot is set up for automated code reviews on this repo. Configure here.