NewLeaseCache creates a new instance of a LeaseCache.

NewSendResponse creates a new SendResponse and takes care of initializing its fields properly.

APIProxy is an implementation of the proxier interface that is used to forward the request to Vault and get the response.

CacheMeta contains metadata information about the response, such as whether it was a cache hit or miss, and the age of the cached entry.

LeaseCache is an implementation of Proxier that handles the caching of responses.

LeaseCacheConfig is the configuration for initializing a new Lease.

SendRequest is the input for Proxier.Send.

SendResponse is the output from Proxier.Send.

Proxier is the interface implemented by different components that are responsible for performing specific tasks, such as caching and proxying.