fix: incorrect token balance changes for simulations of multiple tokens that include an NFT mint#4290
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fix: incorrect token balance changes for simulations of multiple tokens that include an NFT mint#4290
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OGPoyraz
approved these changes
May 21, 2024
vinistevam
approved these changes
May 21, 2024
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dbrans
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May 21, 2024
## Explanation Patch release of TransactionController with #4290 ## References <!-- Are there any issues that this pull request is tied to? Are there other links that reviewers should consult to understand these changes better? For example: * Fixes #12345 * Related to #67890 --> * Related to MetaMask/metamask-extension#24586
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Explanation
When simulating a transaction resulting in an NFT mint, we skip the prior owner check for the NFT since the token does not exist yet. However, for subsequent tokens, we were using the incorrect index for the prior balance transaction.
The fix is to keep a separate prevBalanceIndex, which we only increment if a prior balance transaction was included in the simulation.
References
Changelog
@metamask/transaction-controllerChecklist