type APICallWriter interface {
	WriteAPICall(ctx context.Context, l *ctlog.Log, apiCall *apicall.APICall) error
}

type RootSetID string

type RootsReader interface {
	// WatchRoots monitors storage for get-roots responses and communicates their content to the caller.
	// A unique, deterministic identifier is generated for any set of root certificates (a RootSetID);
	// this will be sent over the channel and can be used to lookup further information about that set.
	// WatchRoots will immediately send the latest RootSetID when it is first called.
	WatchRoots(ctx context.Context, l *ctlog.Log) (<-chan RootSetID, error)

	// ReadRoots returns the root certificates that make up a particular RootSet,
	// i.e. the set of certificates returned by a CT get-roots call.
	ReadRoots(ctx context.Context, rootSet RootSetID) ([]*x509.Certificate, error)
}

type RootsWriter interface {
	// WriteRoots stores the fact that the given roots were received from a particular CT Log at the specified time.
	// It will remove any duplicate certificates from roots before storing them.
	WriteRoots(ctx context.Context, l *ctlog.Log, roots []*x509.Certificate, receivedAt time.Time) error
}

type STHWriter interface {
	WriteSTH(ctx context.Context, l *ctlog.Log, sth *ct.SignedTreeHead, receivedAt time.Time, errs []error) error
}