Refactor services to align with eventual RpcService #5109
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Both RetryPolicy and CircuitBreakerPolicy from the Cockatiel library allow for listening for events using `on*` methods. Our "service policy" allows for listening to some of the same events as well as the "degraded" event. For parity with Cockatiel — and for easier use in general — this commit removes the callbacks that `createServicePolicy` takes and replaces them with `on*` methods.
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In a future commit, we are adding an RpcService class to `network-controller` to handle automatic failovers. This class is different from the existing service classes in a couple of ways: - RpcService will make use of a new `createServicePolicy` function which encapsulates retry and circuit breaker logic. This will relieve the consuming module for RpcService from needing to test this logic. - RpcService will have `onBreak` and `onDegraded` methods instead of taking `onBreak` and `onDegraded` callbacks as constructor options. This is reflected not only in the class but also in the abstract RPC service interface. To these ends, this commit makes the following changes to `CodefiTokenPricesServiceV2` in `assets-controllers` and `ClientConfigApiService` in `remote-feature-flag-controller`: - Refactor service class to use `createServicePolicy` - Update the abstract service class interface to extend `ServicePolicy` from `controller-utils`, and prepend `I` to the type to indicate that it's not a superclass, but an interface - Deprecate the `onBreak` and `onDegraded` constructor options, and add methods instead
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mcmire
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Jan 23, 2025
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We don't need these tests because this functionality is already covered in the tests for createServicePolicy. We just need to test that the onDegraded callback option works somehow.
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Similar for this test, it's already covered.
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I opted not to use PublicInterface here because it aligns with AbstractTokenPricesService, and it's more explicit IMO.
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Similar to tests in codefi-v2.test.ts, we don't need these since they're already covered by the createServicePolicy tests.
Prithpal-Sooriya
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Jan 24, 2025
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| - Deprecate `ClientConfigApiService` constructor options `onBreak` and `onDegraded` in favor of methods ([#5109](https://github.com/MetaMask/core/pull/5109)) | ||
| - Add `@metamask/controller-utils@^11.4.5` as a dependency ([#5109](https://github.com/MetaMask/core/pull/5109)) | ||
| - `cockatiel` should still be in the dependency tree because it's now a dependency of `@metamask/controller-utils` |
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(comment, can be resolved) IIRC extension assets controller had added patches for cockatiel imports. It would be interesting to see if they are still needed, or if the patch is instead moved to this utils package.
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Ah interesting. I wonder if Cockatiel defines a default export in addition to named exports. But to answer your question yes I think these patches may need to be moved to controller-utils.
zone-live
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Jan 27, 2025
In a future commit, we are adding an RpcService class to `network-controller` to handle automatic failovers. This class is different from the existing service classes in a couple of ways: - RpcService will make use of a new `createServicePolicy` function which encapsulates retry and circuit breaker logic. This will relieve any module that consumes RpcService from needing to test this logic. - RpcService will have `onBreak` and `onDegraded` methods instead of taking `onBreak` and `onDegraded` callbacks as constructor options. This is reflected not only in the class but also in the abstract RPC service interface. To these ends, this commit makes the following changes to `CodefiTokenPricesServiceV2` in `assets-controllers` and `ClientConfigApiService` in `remote-feature-flag-controller`: - Refactor service class to use `createServicePolicy` - Update the abstract service class interface to extend `ServicePolicy` from `controller-utils` - Deprecate the `onBreak` and `onDegraded` constructor options, and add methods instead Note that we are not including `TokenSearchApiService` in this commit, even though it is a class, because it does not use the retry or circuit breaker policy.
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Explanation
In a future commit, we are adding an RpcService class to
network-controllerto handle automatic failovers. This class is different from the existing service classes in a couple of ways:createServicePolicyfunction which encapsulates retry and circuit breaker logic. This will relieve any module that consumes RpcService from needing to test this logic.onBreakandonDegradedmethods instead of takingonBreakandonDegradedcallbacks as constructor options. This is reflected not only in the class but also in the abstract RPC service interface.To these ends, this commit makes the following changes to
CodefiTokenPricesServiceV2inassets-controllersandClientConfigApiServiceinremote-feature-flag-controller:createServicePolicyServicePolicyfromcontroller-utilsonBreakandonDegradedconstructor options, and add methods insteadNote that we are not including
TokenSearchApiServicein this commit, even though it is a class, because it does not use the retry or circuit breaker policy.References
Closes #4994.
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(Updated in changelog.)
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