# 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>
A redundant comparison for the `EIP_1559_V2_ENABLED` variable has been
removed. This variable is a boolean, so it can be treated as a boolean
directly in most cases.
One such comparison has been preserved for the purpose of allowing unit
testing, because `process.env` entries are always strings in Node.js. A
comment was added to explain this.
* Trigger Build
* Trigger Build
* Move swaps index variables to redux
* all optimizations so far
* Add better equality checks for selectors in swaps index and build quote
* Clean up PR, remove extra code and logs
* Clean up lavamoat file
* Fixes for optimizations
* Update tests and test snapshots
* Remove unnecessary tests
* Remove unnecessary console log
* Trigger Build
* Trigger Build
* Add delay to account for remote call made by trezor keyring
Co-authored-by: Dan Miller <danjm.com@gmail.com>
* fix missing conversion rates in swaps token drop down
* make defaultToken appear at the top of the owned section of the dropdown with full renderable data regardless of whether swaps tokens are available
* revert change to filter non-native tokens with symbol ETH
* Replace hardcoded sent ether label on confirm screen
* replace transaction type SENT_ETHER with network agnostic SENDING_NATIVE_ASSET
* remove sentEther translation base
* make backwards compatible with lingering transaction of legacy sentEther type
* update localalization files
* fixup legacy sentEther transaction type
* changing new transaction type away from localization string
* revert migration tests
* update fixtures and test data
* update name of new transaction type
* add migration
* remove legacy SENT_ETHER from transaction types enum object
* Allow submission of transactions with dapp suggested gas fees, while estimates are loading
* Allow editing of transactions with dapp suggested feeds, while estimates are still loading
* Ensure that advanced gas is always editible inline when gas is loading
* Ensure that insufficient balance error is shown when gas is loading if the user has customized the gas
* Only set gas price insufficient errors if the current network is non-eip-1559, or the txparams actually have a gas price
* Remove unnecessary param
* lint fix
* ensure insufficient balance warning is showing when loading
* Ensure that eip1559 network transactions do not combined eip1559 and non-eip1559 gas fee properties
* Lint fix
* Allow submission of transactions with dapp suggested gas fees, while estimates are loading
* Allow editing of transactions with dapp suggested feeds, while estimates are still loading
* Ensure that advanced gas is always editible inline when gas is loading
* Ensure that insufficient balance error is shown when gas is loading if the user has customized the gas
* Only set gas price insufficient errors if the current network is non-eip-1559, or the txparams actually have a gas price
* Remove unnecessary param
* lint fix
* ensure insufficient balance warning is showing when loading
* Ensure that eip1559 network transactions do not combined eip1559 and non-eip1559 gas fee properties
* Lint fix
* Hide gasTiming on edit-gas-popover when form is in error
* Show unknown processing error if maxFeePerGas is too low for network conditions
* remove unnecessary change
* remove unnecessary function wrapper
Matthew Epps
Erik Marks
Jyoti Puri
Mark Stacey
Niranjana Binoy
David Walsh
VSaric
Alex Donesky
Brad Decker
Dan J Miller
ryanml