MetaMask/core

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This monorepo is a collection of packages used across multiple MetaMask clients

Is MetaMask/core beginner-friendly?

In the last 30 days, MetaMask/core merged 262 of 377 pull requests from outside contributors, and its maintainers usually reply within 1 day. 12 beginner-friendly issues are open now.

Stars
422
Forks
313
Open beginner issues
12
Indexed issues
331
Avg merge
1d 8h
Merged PRs (30d)
414
Dominant language
TypeScript
License
MIT
Last GitHub push
Nov 4, 2026
Latest indexed
Sep 19, 2026
No contributing guide
Code of conduct
Beginner labels
No beginner labels indexed

How to contribute to MetaMask/core

  1. There is no contributing guide, so start from the README and a few recently merged pull requests to see how changes are proposed.
  2. Read its code of conduct: it covers issues and pull requests as well as chat.
  3. Your contributions will be published under the project's MIT license.
  4. Pick one of the 12 open beginner-friendly issues below and comment that you want to work on it before you start.
Beginner friendly Everything
Open All

Issues somebody may already be working on are listed last. List everything by date

  • EIP-1898 object selectors fail before downstream RPC in eth-json-rpc-middleware 26.0.0
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 62/100

    MetaMask/core#11219 ·

    Maintainers usually reply within 1 day

  • 🚨 CRITICAL: Active EIP-7702 sweeper operation on BNB Chain, Base, Optimism (~1.23M txs, operator funded via Bybit)
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    MetaMask/core#10682 ·

    Maintainers usually reply within 1 day

  • Dependency Dashboard
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    MetaMask/core#10300 ·

    Maintainers usually reply within 1 day

  • [utils] Ban enums, and replace them with alternatives
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 65/100

    MetaMask/core#10211 ·

    Maintainers usually reply within 1 day

  • Cannot sign a UserOperation for gasless approve + swap with MetaMask Stateless7702
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 30/100

    MetaMask/core#9970 ·

    Maintainers usually reply within 1 day

  • Tested with Firefox 152.0.5 and 154.0a1, both had the issue with jQuery.
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 10/100

    MetaMask/core#9805 ·

    Maintainers usually reply within 1 day

  • Remove legacy global/selected-chain path from GasFeeController
    Open
    • Is something wrong?
    team-confirmations

    Difficulty 4/5 3-5 days Newbie friendliness 55/100

    MetaMask/core#9585 ·

    Maintainers usually reply within 1 day

  • False-Positive/Removal Request.
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    MetaMask/core#9479 ·

    Maintainers usually reply within 1 day

  • Derive transaction status-change events from state in `#updateTransactionInternal`
    May be free again Open
    • Is something wrong?
    team-confirmations

    MetaMask/core#9412 · 1 assignee ·

    Maintainers usually reply within 1 day

  • False positive on my website
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 25/100

    MetaMask/core#9410 ·

    Maintainers usually reply within 1 day

  • Backport workflow-hardening fix (unpinned-uses) to 5 release branches
    Open
    • Is something wrong?

    Difficulty 3/5 3-5 days Newbie friendliness 72/100

    MetaMask/core#9276 ·

    Maintainers usually reply within 1 day

  • Support smart-contract / multisig accounts (e.g. Safe) via keyring Snaps — relax the internal-account guards
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 45/100

    MetaMask/core#9179 ·

    Maintainers usually reply within 1 day

  • wallet: Make `fetch` injectable in `NetworkController` initialization
    May be free again Open
    • Is something wrong?
    team-ocap-kernel

    MetaMask/core#8793 · 1 assignee ·

    Maintainers usually reply within 1 day

  • wallet: Document the state-injection contract in README
    May be free again Open
    • Is something wrong?
    team-ocap-kernel

    MetaMask/core#8792 · 1 assignee ·

    Maintainers usually reply within 1 day

  • wallet: Make and record an init-messenger pattern decision
    May be free again Open
    • Is something wrong?
    team-ocap-kernel

    MetaMask/core#8790 · 1 assignee ·

    Maintainers usually reply within 1 day

  • wallet-cli: Integrate ocap kernel
    Open
    • Is something wrong?
    team-ocap-kernel

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    MetaMask/core#8683 ·

    Maintainers usually reply within 1 day

  • [P2] `QueryClient` distributed-tracing observability in `BaseDataService`
    May be free again Open
    • Is something wrong?
    for-migration mig-epic-42-child

    Difficulty 4/5 3-5 days Newbie friendliness 50/100

    MetaMask/core#8552 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Expose replacement implementations of `QueryClient` APIs in UI
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    MetaMask/core#8531 ·

    Maintainers usually reply within 1 day

  • Block `QueryClient` API surface in UI
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    MetaMask/core#8530 ·

    Maintainers usually reply within 1 day

  • Upgrade to TypeScript 6.0
    Open
    • Is something wrong?
    team-core-platform wf-typescript-upgrades

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    MetaMask/core#8210 · 2 comments ·

    Maintainers usually reply within 1 day

  • [RemoteFeatureFlagController] Unclear behaviour on threshold ordering.
    Open
    • Is something wrong?
    team-extension-platform team-mobile-platform

    Difficulty 4/5 3-5 days Newbie friendliness 30/100

    MetaMask/core#8122 · 4 comments ·

    Maintainers usually reply within 1 day

  • Custom tokens show 0 balance after import
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    MetaMask/core#7888 · 6 comments ·

    Maintainers usually reply within 1 day

  • [base-controller] Make `metadata` a static property
    Open
    • Is something wrong?
    team-core-platform

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    MetaMask/core#7633 ·

    Maintainers usually reply within 1 day

  • [base-controller] Make `name` a static property
    Open
    • Is something wrong?
    team-core-platform

    Difficulty 3/5 1-2 days Newbie friendliness 45/100

    MetaMask/core#7632 ·

    Maintainers usually reply within 1 day

  • Re-enable `jsdoc/check-tag-names`
    Open
    • Is something wrong?
    team-core-platform

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    MetaMask/core#7629 ·

    Maintainers usually reply within 1 day

  • Re-enable `jsdoc/require-jsdoc`
    Open
    • Is something wrong?
    team-core-platform

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    MetaMask/core#7628 ·

    Maintainers usually reply within 1 day

  • Proxy Key Implementation
    Open
    • Is something wrong?

    Difficulty 5/5 Over a week Newbie friendliness 15/100

    MetaMask/core#7549 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `user-operation-controller`
    Open
    • Is something wrong?
    No-Epic team-confirmations

    Difficulty 3/5 1-2 days Newbie friendliness 30/100

    MetaMask/core#7399 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `token-search-discovery-controller`
    Open
    • Is something wrong?
    team-assets

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7396 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `signature-controller`
    Open
    • Is something wrong?
    No-Epic team-confirmations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7393 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `selected-network-controller`
    Open
    • Is something wrong?
    team-wallet-integrations

    Difficulty 3/5 1-2 days Newbie friendliness 30/100

    MetaMask/core#7391 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `profile-sync-controller`
    Open
    • Is something wrong?
    team-accounts

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7386 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `phishing-controller`
    Open
    • Is something wrong?
    team-product-safety

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7382 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `network-enablement-controller`
    Open
    • Is something wrong?
    team-assets

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7378 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `name-controller`
    Open
    • Is something wrong?
    No-Epic team-confirmations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7376 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `multichain-transactions-controller`
    Open
    • Is something wrong?
    team-accounts

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7375 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `multichain-api-middleware`
    Open
    • Is something wrong?
    team-wallet-integrations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7373 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `multichain-account-service`
    Open
    • Is something wrong?
    team-accounts

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7372 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `message-manager`
    Open
    • Is something wrong?
    No-Epic team-confirmations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7370 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `logging-controller`
    Open
    • Is something wrong?
    No-Epic team-confirmations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7369 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `gator-permissions-controller`
    Open
    • Is something wrong?
    team-delegation

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7365 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `gas-fee-controller`
    Open
    • Is something wrong?
    No-Epic team-confirmations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7364 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `foundryup`
    Open
    • Is something wrong?
    team-extension-platform team-mobile-platform

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7363 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `ens-controller`
    Open
    • Is something wrong?
    No-Epic team-confirmations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7358 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `eip1193-permission-middleware`
    Open
    • Is something wrong?
    team-wallet-integrations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7357 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `eip-5792-middleware`
    May be free again Open
    • Is something wrong?
    team-wallet-integrations

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7355 · 1 comment ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `earn-controller`
    Open
    • Is something wrong?
    team-earn

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7354 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `delegation-controller`
    Open
    • Is something wrong?
    team-delegation

    Difficulty 3/5 1-2 days Newbie friendliness 25/100

    MetaMask/core#7353 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `chain-agnostic-permission`
    Open
    • Is something wrong?
    team-wallet-integrations

    Difficulty 3/5 1-2 days Newbie friendliness 32/100

    MetaMask/core#7348 ·

    Maintainers usually reply within 1 day

  • Fix suppressed lint errors in `bridge-status-controller`
    Open
    • Is something wrong?
    team-swaps-and-bridge

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    MetaMask/core#7346 ·

    Maintainers usually reply within 1 day

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