NUT-19: Cached Requests and Responses (#624)

* fast-api-cache setup

* testing the cache

* fix

* still not working

* asynccontextmanager

* move test

* use redis & custom caching setup (like CDK)

* make format

* poetry lock

* fix format string + log when a cached response is found

* log when a cahced response is found

* fix tests

* poetry lock

* try tests on github

* use docker compose

* maybe we dont need docker

* fix types

* create_task instead of run

* how about we start postgres

* mint features

* format

* remove deprecated setex call

* use global expiry for all cached routes

* refactor feature map and set default to 1 week

* refactor feature construction

* Cache NUT-19

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Co-authored-by: callebtc <93376500+callebtc@users.noreply.github.com>

cashu/core/settings.py

@@ -231,6 +231,12 @@ class CoreLightningRestFundingSource(MintSettings):
     mint_corelightning_rest_cert: Optional[str] = Field(default=None)
 
 
+class MintRedisCache(MintSettings):
+    mint_redis_cache_enabled: bool = Field(default=False)
+    mint_redis_cache_url: Optional[str] = Field(default=None)
+    mint_redis_cache_ttl: Optional[int] = Field(default=60 * 60 * 24 * 7)  # 1 week
+
+
 class Settings(
     EnvSettings,
     LndRPCFundingSource,
@@ -240,6 +246,7 @@ class Settings(
     FakeWalletSettings,
     MintLimits,
     MintBackends,
+    MintRedisCache,
     MintDeprecationFlags,
     MintSettings,
     MintInformation,