The connect route now takes a route parameter: the permissions request
id. This id is set whenever the permissions connect screen is opened,
ensuring that that tab is for that specific request alone.
This makes handling of multiple permissions requests a bit more
intuitive. Previously whenever opening multiple permissions requests,
the first one would be shown on each successive tab, whereas you
would expect each tab to show the request that prompted the tab to
open. Users may now address permissions request in whichever order
they'd like to, rather than being forced to deal with them
chronologically.
* add PermissionsController
remove provider approval controller
integrate rpc-cap
create PermissionsController
move provider approval functionality to permissions controller
add permissions approval ui, settings page
add permissions activity and history
move some functionality to metamask-inpage-provider
rename siteMetadata -> domainMetadata
add accountsChange notification to inpage provider
move functionality to inpage provider
update inpage provider
Remove 'Connections' settings page (#7369)
add hooks for exposing accounts in settings
rename unused messages in non-English locales
Add external extension id to metadata (#7396)
update inpage provider, rpc-cap
add eth_requestAccounts handling to background
prevent notifying connections if extension is locked
update inpage provider
Fix lint errors
add migration
review fixes
transaction controller review updates
removed unused messages
* Login Per Site UI (#7368)
* LoginPerSite original UI changes to keep
* First commit
* Get necessary connected tab info for redirect and icon display for permissioned sites
* Fix up designs and add missing features
* Some lint fixes
* More lint fixes
* Ensures the tx controller + tx-state-manager orders transactions in the order they are received
* Code cleanup for LoginPerSite-ui
* Update e2e tests to use new connection flow
* Fix display of connect screen and app header after login when connect request present
* Update metamask-responsive-ui.spec for new item in accounts dropdown
* Fix approve container by replacing approvedOrigins with domainMetaData
* Adds test/e2e/permissions.spec.js
* Correctly handle cancellation of a permissions request
* Redirect to home after disconnecting all sites / cancelling all permissions
* Fix display of site icons in menu
* Fix height of permissions page container
* Remove unused locale messages
* Set default values for openExternalTabs and tabIdOrigins in account-menu.container
* More code cleanup for LoginPerSite-ui
* Use extensions api to close tab in permissions-connect
* Remove unnecessary change in domIsReady() in contentscript
* Remove unnecessary private function markers and class methods (for background tab info) in metamask-controller.
* Adds getOriginOfCurrentTab selector
* Adds IconWithFallback component and substitutes for appropriate cases
* Add and utilize font mixins
* Remove unused method in disconnect-all.container.js
* Simplify buttonSizeLarge code in page-container-footer.component.js
* Add and utilize getAccountsWithLabels selector
* Remove console.log in ui/app/store/actions.js
* Change last connected time format to yyyy-M-d
* Fix css associated with IconWithFallback change
* Ensure tracked openNonMetamaskTabsIDs are correctly set to inactive on tab changes
* Code cleanup for LoginPerSite-ui
* Use reusable function for modifying openNonMetamaskTabsIDs in background.js
* Enables automatic switching to connected account when connected domain is open
* Prevent exploit of tabIdOriginMap in background.js
* Remove unneeded code from contentscript.js
* Simplify current tab origin and window opener logic using remotePort listener tabs.queryTabs
* Design and styling fixes for LoginPerSite-ui
* Fix permissionHistory and permission logging for eth_requestAccounts and eth_accounts
* Front end changes to support display of lastConnected time in connected and permissions screens
* Fix lint errors
* Refactor structure of permissionsHistory
* Fix default values and object modifications for domain and permissionsHistory related data
* Fix connecting to new accounts from modal
* Replace retweet.svg with connect-white.svg
* Fix signature-request.spec
* Update metamask-inpage-provider version
* Fix permissions e2e tests
* Remove unneeded delay from test/e2e/signature-request.spec.js
* Add delay before attempting to retrieve network id in dapp in ethereum-on=.spec
* Use requestAccountTabIds strategy for determining tab id that opened a given window
* Improve default values for permissions requests
* Add some message descriptions to app/_locales/en/messages.json
* Code clean up in permission controller
* Stopped deep cloning object in mapObjectValues
* Bump metamask-inpage-provider version
* Add missing description in app/_locales/en/messages.json
* Return promises from queryTabs and switchToTab of extension.js
* Remove unused getAllPermissions function
* Use default props in icon-with-fallback.component.js
* Stop passing to permissions controller
* Delete no longer used clear-approved-origins modal code
* Remove duplicate imports in ui/app/components/app/index.scss
* Use URL instead of regex in getOriginFromUrl()
* Add runtime error checking to platform, promise based extension.tab methods
* Support permission requests from external extensions
* Improve font size and colour of the domain origin on the permission confirmation screen
* Add support for toggling permissions
* Ensure getRenderablePermissionsDomains only returns domains with exposedAccount caveat permissions
* Remove unused code from LoginPerSite-ui branch
* Ensure modal closes on Enter press for new-account-modal.component.js
* Lint fix
* fixup! Login Per Site UI (#7368)
* Some code cleanup for LoginPerSite
* Adds UX for connecting to dapps via the connected sites screen (#7593)
* Adds UX for connecting to dapps via the connected sites screen
* Use openMetaMaskTabIds from background.js to determine if current active tab is MetaMask
* Delete unused permissions controller methods
* Fixes two small bugs in the LoginPerSite ui (#7595)
* Restore `providerRequest` message translations (#7600)
This message was removed, but it was replaced with a very similar
message called `likeToConnect`. The only difference is that the new
message has "MetaMask" in it. Preserving these messages without
"MetaMask" is probably better than deleting them, so these messages
have all been restored and renamed to `likeToConnect`.
* Login per site no sitemetadata fix (#7610)
* Support connected sites for which we have no site metadata.
* Change property containing subtitle info often populated by origin to a more accurate of purpose name
* Lint fix
* Improve disconnection modal messages (#7612)
* Improve disconnectAccountModalDescription and disconnectAllModalDescription messages
* Update disconnectAccountModalDescription app/_locales/en/messages.json
Co-Authored-By: Mark Stacey <markjstacey@gmail.com>
* Improve disconnectAccount modal message clarity
* Adds cancel button to the account selection screen of the permissions request flow (#7613)
* Fix eth_accounts permission language & selectability (#7614)
* fix eth_accounts language & selectability
* fix MetaMask capitalization in all messages
* Close sidebar when opening connected sites (#7611)
The 'Connected Sites' button in the accounts details now closes the
sidebar, if it is open. This was accomplished by pulling the click
handler for that button up to the wallet view component, where another
button already followed a similar pattern of closing the sidebar.
It seemed confusing to me that one handler was in the `AccountsDetails`
container component, and one was handed down from above, so I added
PropTypes to the container component.
I'm not sure that the WalletView component is the best place for this
logic, but I've put it there for now to be consistent with the add
token button.
* Reject permissions request upon tab close (#7618)
Permissions requests are now rejected when the page is closed. This
only applies to the full-screen view, as that is the view permission
requests should be handled in. The case where the user deals with the
request through a different view is handled in #7617
* Handle tab update failure (#7619)
`extension.tabs.update` can sometimes fail if the user interacts with
the tabs directly around the same time. The redirect flow has been
updated to ensure that the permissions tab is still closed in that
case. The user is on their own to find the dapp tab again in that case.
* Login per site tab popup fixes (#7617)
* Handle redirect in response to state update in permissions-connect
* Ensure origin is available to permissions-connect subcomponents during redirect
* Hide app bar whenever on redirect route
* Improvements to handling of redirects in permissions-connect
* Ensure permission request id change handling only happens when page is not null
* Lint fix
* Decouple confirm transaction screen from the selected address (#7622)
* Avoid race condtion that could prevent contextual account switching (#7623)
There was a race condition in the logic responsible for switching the
selected account based upon the active tab. It was asynchronously
querying the active tab, then assuming it had been retrieved later.
The active tab info itself was already in the redux store in another
spot, one that is guaranteed to be set before the UI renders. The
race condition was avoided by deleting the duplicate state, and using
the other active tab state.
* Only redirect back to dapp if current tab is active (#7621)
The "redirect back to dapp" behaviour can be disruptive when the
permissions connect tab is not active. The purpose of the redirect was
to maintain context between the dapp and the permissions request, but
if the user has already moved to another tab, that no longer applies.
* Fix JSX style lint errors
* Remove unused state
* add PermissionsController
remove provider approval controller
integrate rpc-cap
create PermissionsController
move provider approval functionality to permissions controller
add permissions approval ui, settings page
add permissions activity and history
move some functionality to metamask-inpage-provider
rename siteMetadata -> domainMetadata
add accountsChange notification to inpage provider
move functionality to inpage provider
update inpage provider
Remove 'Connections' settings page (#7369)
add hooks for exposing accounts in settings
rename unused messages in non-English locales
Add external extension id to metadata (#7396)
update inpage provider, rpc-cap
add eth_requestAccounts handling to background
prevent notifying connections if extension is locked
update inpage provider
Fix lint errors
add migration
review fixes
transaction controller review updates
removed unused messages
* Login Per Site UI (#7368)
* LoginPerSite original UI changes to keep
* First commit
* Get necessary connected tab info for redirect and icon display for permissioned sites
* Fix up designs and add missing features
* Some lint fixes
* More lint fixes
* Ensures the tx controller + tx-state-manager orders transactions in the order they are received
* Code cleanup for LoginPerSite-ui
* Update e2e tests to use new connection flow
* Fix display of connect screen and app header after login when connect request present
* Update metamask-responsive-ui.spec for new item in accounts dropdown
* Fix approve container by replacing approvedOrigins with domainMetaData
* Adds test/e2e/permissions.spec.js
* Correctly handle cancellation of a permissions request
* Redirect to home after disconnecting all sites / cancelling all permissions
* Fix display of site icons in menu
* Fix height of permissions page container
* Remove unused locale messages
* Set default values for openExternalTabs and tabIdOrigins in account-menu.container
* More code cleanup for LoginPerSite-ui
* Use extensions api to close tab in permissions-connect
* Remove unnecessary change in domIsReady() in contentscript
* Remove unnecessary private function markers and class methods (for background tab info) in metamask-controller.
* Adds getOriginOfCurrentTab selector
* Adds IconWithFallback component and substitutes for appropriate cases
* Add and utilize font mixins
* Remove unused method in disconnect-all.container.js
* Simplify buttonSizeLarge code in page-container-footer.component.js
* Add and utilize getAccountsWithLabels selector
* Remove console.log in ui/app/store/actions.js
* Change last connected time format to yyyy-M-d
* Fix css associated with IconWithFallback change
* Ensure tracked openNonMetamaskTabsIDs are correctly set to inactive on tab changes
* Code cleanup for LoginPerSite-ui
* Use reusable function for modifying openNonMetamaskTabsIDs in background.js
* Enables automatic switching to connected account when connected domain is open
* Prevent exploit of tabIdOriginMap in background.js
* Remove unneeded code from contentscript.js
* Simplify current tab origin and window opener logic using remotePort listener tabs.queryTabs
* Design and styling fixes for LoginPerSite-ui
* Fix permissionHistory and permission logging for eth_requestAccounts and eth_accounts
* Front end changes to support display of lastConnected time in connected and permissions screens
* Fix lint errors
* Refactor structure of permissionsHistory
* Fix default values and object modifications for domain and permissionsHistory related data
* Fix connecting to new accounts from modal
* Replace retweet.svg with connect-white.svg
* Fix signature-request.spec
* Update metamask-inpage-provider version
* Fix permissions e2e tests
* Remove unneeded delay from test/e2e/signature-request.spec.js
* Add delay before attempting to retrieve network id in dapp in ethereum-on=.spec
* Use requestAccountTabIds strategy for determining tab id that opened a given window
* Improve default values for permissions requests
* Add some message descriptions to app/_locales/en/messages.json
* Code clean up in permission controller
* Stopped deep cloning object in mapObjectValues
* Bump metamask-inpage-provider version
* Add missing description in app/_locales/en/messages.json
* Return promises from queryTabs and switchToTab of extension.js
* Remove unused getAllPermissions function
* Use default props in icon-with-fallback.component.js
* Stop passing to permissions controller
* Delete no longer used clear-approved-origins modal code
* Remove duplicate imports in ui/app/components/app/index.scss
* Use URL instead of regex in getOriginFromUrl()
* Add runtime error checking to platform, promise based extension.tab methods
* Support permission requests from external extensions
* Improve font size and colour of the domain origin on the permission confirmation screen
* Add support for toggling permissions
* Ensure getRenderablePermissionsDomains only returns domains with exposedAccount caveat permissions
* Remove unused code from LoginPerSite-ui branch
* Ensure modal closes on Enter press for new-account-modal.component.js
* Lint fix
* fixup! Login Per Site UI (#7368)
* Some code cleanup for LoginPerSite
* Adds UX for connecting to dapps via the connected sites screen (#7593)
* Adds UX for connecting to dapps via the connected sites screen
* Use openMetaMaskTabIds from background.js to determine if current active tab is MetaMask
* Delete unused permissions controller methods
* Fixes two small bugs in the LoginPerSite ui (#7595)
* Restore `providerRequest` message translations (#7600)
This message was removed, but it was replaced with a very similar
message called `likeToConnect`. The only difference is that the new
message has "MetaMask" in it. Preserving these messages without
"MetaMask" is probably better than deleting them, so these messages
have all been restored and renamed to `likeToConnect`.
* Login per site no sitemetadata fix (#7610)
* Support connected sites for which we have no site metadata.
* Change property containing subtitle info often populated by origin to a more accurate of purpose name
* Lint fix
* Improve disconnection modal messages (#7612)
* Improve disconnectAccountModalDescription and disconnectAllModalDescription messages
* Update disconnectAccountModalDescription app/_locales/en/messages.json
Co-Authored-By: Mark Stacey <markjstacey@gmail.com>
* Improve disconnectAccount modal message clarity
* Adds cancel button to the account selection screen of the permissions request flow (#7613)
* Fix eth_accounts permission language & selectability (#7614)
* fix eth_accounts language & selectability
* fix MetaMask capitalization in all messages
* Close sidebar when opening connected sites (#7611)
The 'Connected Sites' button in the accounts details now closes the
sidebar, if it is open. This was accomplished by pulling the click
handler for that button up to the wallet view component, where another
button already followed a similar pattern of closing the sidebar.
It seemed confusing to me that one handler was in the `AccountsDetails`
container component, and one was handed down from above, so I added
PropTypes to the container component.
I'm not sure that the WalletView component is the best place for this
logic, but I've put it there for now to be consistent with the add
token button.
* Reject permissions request upon tab close (#7618)
Permissions requests are now rejected when the page is closed. This
only applies to the full-screen view, as that is the view permission
requests should be handled in. The case where the user deals with the
request through a different view is handled in #7617
* Handle tab update failure (#7619)
`extension.tabs.update` can sometimes fail if the user interacts with
the tabs directly around the same time. The redirect flow has been
updated to ensure that the permissions tab is still closed in that
case. The user is on their own to find the dapp tab again in that case.
* Login per site tab popup fixes (#7617)
* Handle redirect in response to state update in permissions-connect
* Ensure origin is available to permissions-connect subcomponents during redirect
* Hide app bar whenever on redirect route
* Improvements to handling of redirects in permissions-connect
* Ensure permission request id change handling only happens when page is not null
* Lint fix
* Decouple confirm transaction screen from the selected address (#7622)
* Avoid race condtion that could prevent contextual account switching (#7623)
There was a race condition in the logic responsible for switching the
selected account based upon the active tab. It was asynchronously
querying the active tab, then assuming it had been retrieved later.
The active tab info itself was already in the redux store in another
spot, one that is guaranteed to be set before the UI renders. The
race condition was avoided by deleting the duplicate state, and using
the other active tab state.
* Only redirect back to dapp if current tab is active (#7621)
The "redirect back to dapp" behaviour can be disruptive when the
permissions connect tab is not active. The purpose of the redirect was
to maintain context between the dapp and the permissions request, but
if the user has already moved to another tab, that no longer applies.
* Fix JSX style lint errors
* Remove unused state
Maker has upgraded its Dai token to "Multi-Collateral Dai" (MCD) and requires
all users interacting with Dai migrate their tokens to the new version. Dai
now exclusively refers to Multi-Collateral Dai and what was previouly called
Dai is now Sai (Single Collateral Dai).
In this description, Sai refers to what was (prior to the 2019-11-18) known as Dai.
Dai is the _new_ token.
This changeset:
1. Only affects users who had non-zero Sai at the old contract address
2. Displays a persistent notification for users with Sai
3. Updates the token symbol for users already tracking the Sai token
4. Bumps our direct and indirect eth-contract-metadata dependencies
The notification copy:
> A message from Maker: The new Multi-Collateral Dai token has been released. Your old tokens are now called Sai. Please upgrade your Sai tokens to the new Dai.
The copy is from the Maker team.
* Use child components for multiple notifications component
The multiple notifications component has been updated to take its child
components as children rather than as a props array, so that the child
components are never executed in the case where they aren't needed.
* Fix threebox last updated proptype
* Delete unused code
* Run threebox imports through migrations
* Remove 3box feature flag
* Remove unnecessary use of 'type' in threebox._updatePlugin
* Fix threebox controller getLastUpdated
* Turn off threebox by default
* Rename restoredFromThreeBox to showRestorePrompt
* Remove accientally added method from threebox controller
* Restore from threebox on import from unlock screen
* Throw on non 404 errors from Box.getconfig in new3Box
* Adds threebox controller
* Adds threebox approval modal
* Fix unit tests and lint after addition of threebox
* Correct threebox behaviour after rejecting request for backup; fixes e2e tests.
* Update threebox controller for automatic syncing
* Ensure frontend locale updates when preferences are changed via direct update within controller
* Add toggle in settings for 3box syncing
* Update threebox controller for latest 3box version
* Delete unnecessary frontend changes for threebox integration
* Backing up address book contacts with threebox
* Update unit tests for 3box-integration additions
* Only enable threebox by default for new wallets
* Mock globals for correct unit tests
* 3box '1.10.2' -> '^1.10.2'
* Correct capilalization on 3Box
* Use log.debug instead of console.log in threebox controller
* Update yarn.lock
* Remove edge build
* Split 3box module into background deps js file
* extra bundle opts for bg-libs
* sync yarn.lock
* new3Box logic
* Show confirm threebox restore after import
* Remove bg-libs.js from manifest file for dev builds
* Switch 3Box controller to using the spaces api (instead of the profile api)
* Finalize switching to spaces api and only restoring from 3box after import
* Update metamask-controller-test.js for threebox controller changes
* Make threebox modal style consistent with others and update success button wording
* Use mock 3box when in test
* Correct 3box modal header
* Remove unnecessary property of threebox controller provider
* Remove unnecessary method calls after restoration from 3box in the threebox-restore-confirm modal.
* Replace setThreeBoxSyncingPermission calls in routes/index.js with turnThreeBoxSyncingOn
* Replace erroneous use of with
* Replace erroneous use of threeboxSyncing with threeBoxSyncingAllowed in advancted-tab directory
* Lint fixes for 3box changes
* Log errors encountered when updating 3Box
* Remove unnecessary parameter from state update
* Add timeout to initial 3Box sync
The initial 3Box sync will now timeout after 1 minute. If the timeout
is triggered, 3Box is disabled and cannot be re-enabled unless the
initial sync does finally finish. If it never finishes, 3Box cannot
be enabled unless the extension is reinstalled.
The Advanced Settings page was updated to show this option as disabled
in that circumstance, with a new discription explaining why it's
disabled. The UI here could certainly be improved.
Additionally, "on" and "off" labels were added to the toggle to match
the other toggles on the Advanced Settings page.
* Use non-minified 3Box module
We had previously used the minified 3Box module to avoid a build error
encountered when `envify` was processing the `libp2p` module (which is
used by 3Box). The build would fail because `esprima` (used by `envify`)
is incompatible with the object spread/rest operator (which is used in
`libp2p`).
That issue has been solved by adding a global Babelify transformation
specifically for transpiling out the object rest/spread operator from
dependencies. It has been targetted to only affect `libp2p` to avoid
extending the build time too much. This workaround can be used until
a new version of `esprima` is released that includes this bug fix.
* Use app key addresses for threebox
* Replace use of modal for confirming 3box restoration with a home notification
* Adds e2e tests for restoring from threebox
* Update eth-keyring-controller to 5.1.0
* Correct parameters passed to getAppKeyAddress in threebox.js
* Add prefix to origin passed to getAppKeyAddress in threebox.js
* Remove unused locale message.
* Prevent CORS errors in firefox e2e tests
* Ensure extraneous scripts are excluded from the local test dev build
* Move threeBoxLastUpdate state from home.component to redux
* Threebox PR code cleanup
* Always use first address when initializing threebox
* Replace setRestoredFromThreeBox api with setRestoredFromThreeBoxToFalse and setRestoredFromThreeBoxToTrue
* Update development/metamaskbot-build-announce.js to include ui-libs and bg-libs in hard coded bundle list
* Update test/e2e/threebox.spec.js to use new helpers added with pull #7144
* Make setFeatureFlag available on the ui window during testing
* Hide threebox feature behind a feature flag that can only be activated via dev console
* Remove unnecessary migration of threebox feature flag
* Prevent this.init() call in threebox constructor if feature flag is not turned on
* Prevent threebox notification from showing if feature flag is falsy
* http://localhost/8889 -> http://localhost/* in gulp manifest:testing tasks
The privacy mode notification was not able to be dismissed from the
popup UI. It should have been dismissed after clicking "Learn more",
but that button opens a new tab first before dismissing the flag.
Opening the new tab kills the pop UI process before it has a chance
to set that flag, so it never gets set.
Re-ordering the handler to set the flag first avoids this problem.
* Nix notification for Share Address
* Add Connections settings tab in place of privacy mode toggle
* Split ProviderApprovalController into two stores
* Remove privacyMode feature flag altogether
* Add migration to remove privacyMode feature flag
* Open backup challenge screen, prompted from notification, in browser window
* Remove no longer used showingSeedPhraseBackupAfterOnboarding related code
* Make incremental-security.spec.js click through the seed phrase success screen
* Replace use of backup-notification with use of home notification
* Pin notifications relative to window
* Remove unneeded isRequired condition on some home.component properties
* Refactor rendering of home notifications
* UX for multiple notifications
* Adds dismissal to provider request notification.
* Fix test failures
The e2e tests have been updated to reference `home-notification`
classnames instead of the removed `background-notification`. The
active tab proptypes and default values were updated as well.
* Implements ability to defer seed phrase backup to later
* Adds incremental-security.spec.js, including test dapp that sends signed tx with stand alone localhost provider
* Update metamask-responsive-ui for incremental account security changes
* Update backup-notification style and fix responsiveness of seed phrase screen
* Remove uneeded files from send-eth-with-private-key-test/
* Apply linguist flags in .gitattributes for send-eth-with-private-key-test/ethereumjs-tx.js
* Improve docs in controllers/onboarding.js
* Clean up metamask-extension/test/e2e/send-eth-with-private-key-test/index.html
* Remove unnecessary newlines in a couple first-time-flow/ files
* Fix import of backup-notification in home.component
* Fix git attrs file
`seedWords` used to be stored on the metamask state temporarily at
certain points. This hasn't been the case since #5994, but references
to this state remained. All of the logic remained for correctly updating
these `seedWords`, handling them during navigation, and scrubbing them
from the state.
However the state was never updated in practice. The `seedWords` are
still returned by `verifySeedPhrase`, and they're still stored in
component state in a few places. But they aren't ever set in the Redux
metadata state or the Preferences controller.
All references to this state have been removed, along with any logic
for interacting with this state. A few unused actions were removed as
well.
* Action select step of onboarding flow added.
* Update navigation on create and import password screens.
* Adds terms of service checkbox to create and import account screens.
* Add security warning to jazzicon intro step
* Update and streamline unique image to confirm seed steps of first time flow.
* UI touch ups to welcome screen.
* UI touch up on select action page
* Fix first time import flow.
* Add end of flow screen to first time flow
* Replace unique image screen with updated fishing warning screen.
* Update e2e tests for onboarding flow changes.
* Add required translations to onboarding flow.
* Update design of select action screen to emphasize create new wallet option.
* Clean up onboarding flow code.
* Remove notice related code from first-time-flow directory.
* Use updater function argument in new-account.component
* Refactor and fix styling for first time flow. Remove seed phrase from persisted metamask state
* Fix linting and tests
* Fix translations, initialization notice routing
* Fix drizzle tests
* Fix e2e tests
* Fix integration tests
* Fix styling
* Fix migration naming from 030 to 031
* Open extension in browser when user has not completed onboarding
* Parameterize NetworkDisplay background colour
* Update design for login request screen
* Pass siteTitle, siteImage through for calls to ethereum.enable()
* Bring the site images closer together
Mark Stacey
Dan Finlay
Whymarrh Whitby
Dan J Miller
Dan J Miller
Chi Kei Chan
Alexander Tseung
bitpshr
Alexander Tseung