# Permission System 2.0
## Background
This PR migrates the extension permission system to [the new `PermissionController`](https://github.com/MetaMask/snaps-skunkworks/tree/main/packages/controllers/src/permissions).
The original permission system, based on [`rpc-cap`](https://github.com/MetaMask/rpc-cap), introduced [`ZCAP-LD`](https://w3c-ccg.github.io/zcap-ld/)-like permissions to our JSON-RPC stack.
We used it to [implement](https://github.com/MetaMask/metamask-extension/pull/7004) what we called "LoginPerSite" in [version 7.7.0](https://github.com/MetaMask/metamask-extension/releases/tag/v7.7.0) of the extension, which enabled the user to choose which accounts, if any, should be exposed to each dapp.
While that was a worthwhile feature in and of itself, we wanted a permission _system_ in order to enable everything we are going to with Snaps.
Unfortunately, the original permission system was difficult to use, and necessitated the creation of the original `PermissionsController` (note the "s"), which was more or less a wrapper for `rpc-cap`.
With this PR, we shake off the yoke of the original permission system, in favor of the modular, self-contained, ergonomic, and more mature permission system 2.0.
Note that [the `PermissionController` readme](https://github.com/MetaMask/snaps-skunkworks/tree/main/packages/controllers/src/permissions/README.md) explains how the new permission system works.
The `PermissionController` and `SubjectMetadataController` are currently shipped via `@metamask/snap-controllers`. This is a temporary state of affairs, and we'll move them to `@metamask/controllers` once they've landed in prod.
## Changes in Detail
First, the changes in this PR are not as big as they seem. Roughly half of the additions in this PR are fixtures in the test for the new migration (number 68), and a significant portion of the remaining ~2500 lines are due to find-and-replace changes in other test fixtures and UI files.
- The extension `PermissionsController` has been deleted, and completely replaced with the new `PermissionController` from [`@metamask/snap-controllers`](https://www.npmjs.com/package/@metamask/snap-controllers).
- The original `PermissionsController` "domain metadata" functionality is now managed by the new `SubjectMetadataController`, also from [`@metamask/snap-controllers`](https://www.npmjs.com/package/@metamask/snap-controllers).
- The permission activity and history log controller has been renamed `PermissionLogController` and has its own top-level state key, but is otherwise functionally equivalent to the existing implementation.
- Migration number 68 has been added to account for the new state changes.
- The tests in `app/scripts/controllers/permissions` have been migrated from `mocha` to `jest`.
Reviewers should focus their attention on the following files:
- `app/scripts/`
- `metamask-controller.js`
- This is where most of the integration work for the new `PermissionController` occurs.
Some functions that were internal to the original controller were moved here.
- `controllers/permissions/`
- `selectors.js`
- These selectors are for `ControllerMessenger` selector subscriptions. The actual subscriptions occur in `metamask-controller.js`. See the `ControllerMessenger` implementation for details.
- `specifications.js`
- The caveat and permission specifications are required by the new `PermissionController`, and are used to specify the `eth_accounts` permission and its JSON-RPC method implementation.
See the `PermissionController` readme for details.
- `migrations/068.js`
- The new state should be cross-referenced with the controllers that manage it.
The accompanying tests should also be thoroughly reviewed.
Some files may appear new but have just moved and/or been renamed:
- `app/scripts/lib/rpc-method-middleware/handlers/request-accounts.js`
- This was previously implemented in `controllers/permissions/permissionsMethodMiddleware.js`.
- `test/mocks/permissions.js`
- A truncated version of `test/mocks/permission-controller.js`.
Co-authored-by: Mark Stacey <markjstacey@gmail.com>
* support qr based signer
* add CSP for fire fox
* get QR Hardware wallet name from device
* fix qrHardware state missing in runtime
* support qr based signer sign transaction
* refine Request Signature modal ui
* remove feature toggle
* refine ui
* fix notification is closing even there is a pending qr hardware transaction
* add chinese translation, refine ui, fix qr process was breaking in some case
* support import accounts by pubkeys
* refine qr-based wallet ui and fix bugs
* update @keystonehq/metamask-airgapped-keyring to fix that the signing hd path was inconsistent in some edge case
* fix: avoid unnecessay navigation, fix ci
* refactor qr-hardware-popover with @zxing/browser
* update lavamoat policy, remove firefox CSP
* refine qr reader ui, ignore unnecessary warning display
* code refactor, use async functions insteads promise
Co-authored-by: Soralit <soralitria@gmail.com>
* GridPlus: Adds support for GridPlus Lattice1 hardware wallet
* Fixes issue with switching hardware HD path
The main `Select HD Path` piece of the account selection component was not
properly hooked up to the state manager (`onPathChange`) and the extra
`Popover` component was being used instead.
I'm not sure what the origin of this is, but I don't see why the Popover
is needed at all. I have remove it and hooked `onPathChange` directly into
the HD path selector dropdown.
This was an issue that nearly every Lattice user who had come from Ledger
has contacted us about.
* GridPlus: Addresses QA issues
* Adds Lattice tutorial + image
* Cleans up connectivity issues (see: https://github.com/GridPlus/eth-lattice-keyring/pull/16)
* GridPlus: Adds Firefox support
To connect to the Lattice you need to open a new tab/window and get
login data from it. We were not able to do this for Firefox because
we relied on the `window` API. This is now fixed.
See corresponding changes:
* `eth-lattice-keyring`: https://github.com/GridPlus/eth-lattice-keyring/pull/17
* Lattice connector: https://github.com/GridPlus/wallet-web/pull/152
* GridPlus: Adds missing error path for Firefox
See: 242a93f559
