Commits on Nov 30, 2024

1. Introduce subscription support in the Wallet crate. …

   The main goal is to add a subscription to CDK Mint updates into the wallet.
   This feature will be particularly useful for improving the code whenever loops
   hit the mint server to check status changes.
   
   The goal is to add an easy-to-use interface that will hide the fact that we're
   connecting to WebSocket and subscribing to events. This will also hide the fact
   that the CDK-mint server may not support WebSocket updates.
   
   To be fully backward compatible, the HttpClientMethods traits have a new
   method, `subscribe,` which will return an object that implements
   `ActiveSubscription.`
   
   In the primary implementation, there is a `SubscriptionClient` that will
   attempt to connect through WebSocket and will fall to the HTTP-status pull and
   sleep approach (the current approach), but upper stream code will receive
   updates as if they come from a stream of updates through WebSocket. This
   `SubscriptionClient` struct will also manage reconnections to WebSockets (with
   automatic resubscriptions) and all the low-level stuff, providing an
   easy-to-use interface and leaving the upper-level code with a nice interface
   that is hard to misuse. When `ActiveSubscription` is dropped, it will
   automatically unsubscribe.

   

   crodas committed Nov 30, 2024
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