chore: remove multichain deprecated package #5960
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mcmire
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Jun 12, 2025
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One thing but otherwise looks good!
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It looks like there are more things to remove here, can you run yarn update-readme-content? I see four lines to remove when I do that:
multichain --> controller_utils;
multichain --> json_rpc_engine;
multichain --> network_controller;
multichain --> permission_controller;
matthewwalsh0
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Oct 16, 2025
## Explanation When publishing a transaction, a batch is automatically created if `batchTransactions` are found on the `TransactionMeta`. If this batch can be achieved via EIP-7702, we currently add a new transaction that supersedes the original. While the original transaction promise currently resolves or rejects based on the new EIP-7702 transaction, its status is changed to `dropped` and duplicate metrics are generated in the clients given two transactions are ultimately created and submitted. This PR instead converts the original transaction to EIP-7702 by updating the transaction parameters and re-signing the original transaction. ## References Related to [#5959](MetaMask/MetaMask-planning#5959) [#5960](MetaMask/MetaMask-planning#5960) ## Checklist - [x] I've updated the test suite for new or updated code as appropriate - [x] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate - [x] I've communicated my changes to consumers by [updating changelogs for packages I've changed](https://github.com/MetaMask/core/tree/main/docs/contributing.md#updating-changelogs), highlighting breaking changes as necessary - [x] I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes <!-- CURSOR_SUMMARY --> --- > [!NOTE] > Converts existing transactions to EIP-7702 when publishing batches, adds newSignature support to onPublish, and refactors publish flow with a default/extra publish hook; updates batch utils to estimate gas/re-sign and tests accordingly. > > - **Transaction publish flow**: > - Introduce `#defaultPublishHook` to encapsulate publish/trace and fallback submission. > - Use `ExtraTransactionsPublishHook` when `txMeta.batchTransactions` exist; it now receives `getTransaction` and `originalPublishHook` and can call the original hook when provided a `newSignature`. > - **Batch processing (EIP-7702)**: > - Convert an existing transaction to EIP-7702 on publish (update `txParams`, estimate gas via new `estimateGas` hook, set `batchId`, re-sign) instead of creating a new superseding tx. > - Add helpers `convertTransactionToEIP7702` and `updateTransactionSignature`. > - **Types**: > - Extend `TransactionBatchSingleRequest.existingTransaction.onPublish` to accept optional `newSignature`. > - **Controller/utils API**: > - Pass `estimateGas` into `addTransactionBatch`. > - **Tests/Changelog**: > - Update tests for new publish and batch behaviors. > - Changelog entry noting EIP-7702 conversion and `newSignature` addition. > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit cae3e22. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY -->
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Explanation
As follow-up work to the previous splitting of the
multichainpackage into 3 new packages@metamask/chain-agnostic-permission@metamask/eip1193-permission-middleware@multichain/multichain-api-middlewaredone in the following PR, we now want to completely deprecate/remove the legacy package and later mark it as deprecated while also linking to the new packages in npm.
References
Changelog
Checklist