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metamask-extension/app/scripts/controllers/permissions/caveat-mutators.js
2022-03-14 12:37:19 -07:00

40 lines
1.3 KiB
JavaScript

import { CaveatMutatorOperation } from '@metamask/controllers';
import { CaveatTypes } from '../../../../shared/constants/permissions';
/**
* Factories that construct caveat mutator functions that are passed to
* PermissionController.updatePermissionsByCaveat.
*/
export const CaveatMutatorFactories = {
[CaveatTypes.restrictReturnedAccounts]: {
removeAccount,
},
};
/**
* Removes the target account from the value arrays of all
* `restrictReturnedAccounts` caveats. No-ops if the target account is not in
* the array, and revokes the parent permission if it's the only account in
* the array.
*
* @param {string} targetAccount - The address of the account to remove from
* all accounts permissions.
* @param {string[]} existingAccounts - The account address array from the
* account permissions.
*/
function removeAccount(targetAccount, existingAccounts) {
const newAccounts = existingAccounts.filter(
(address) => address !== targetAccount,
);
if (newAccounts.length === existingAccounts.length) {
return { operation: CaveatMutatorOperation.noop };
} else if (newAccounts.length > 0) {
return {
operation: CaveatMutatorOperation.updateValue,
value: newAccounts,
};
}
return { operation: CaveatMutatorOperation.revokePermission };
}