refactor: add either.Bytes alias (#117)

pkg/client/events_query/client.go

@@ -48,9 +48,9 @@ type eventsQueryClient struct {
 // corresponding connection which produces its inputs.
 type eventsBytesAndConn struct {
 	// eventsBytes is an observable which is notified about chain event messages
-	// matching the given query. It receives an either.Either[[]byte] which is
+	// matching the given query. It receives an either.Bytes which is
 	// either an error or the event message bytes.
-	eventsBytes observable.Observable[either.Either[[]byte]]
+	eventsBytes observable.Observable[either.Bytes]
 	conn        client.Connection
 	isClosed    bool
 }
@@ -81,7 +81,7 @@ func NewEventsQueryClient(cometWebsocketURL string, opts ...client.EventsQueryCl
 }
 
 // EventsBytes returns an eventsBytes observable which is notified about chain
-// event messages matching the given query. It receives an either.Either[[]byte]
+// event messages matching the given query. It receives an either.Bytes
 // which is either an error or the event message bytes.
 // (see: https://pkg.go.dev/github.com/cometbft/cometbft/types#pkg-constants)
 // (see: https://docs.cosmos.network/v0.47/core/events#subscribing-to-events)
@@ -151,7 +151,7 @@ func (eqc *eventsQueryClient) newEventsBytesAndConn(
 	}
 
 	// Construct an eventsBytes for the given query.
-	eventsBzObservable, eventsBzPublishCh := channel.NewObservable[either.Either[[]byte]]()
+	eventsBzObservable, eventsBzPublishCh := channel.NewObservable[either.Bytes]()
 
 	// Publish either events bytes or an error received from the connection to
 	// the eventsBz observable.
@@ -198,7 +198,7 @@ func (eqc *eventsQueryClient) openEventsBytesAndConn(
 func (eqc *eventsQueryClient) goPublishEventsBz(
 	ctx context.Context,
 	conn client.Connection,
-	eventsBzPublishCh chan<- either.Either[[]byte],
+	eventsBzPublishCh chan<- either.Bytes,
 ) {
 	// Read and handle messages from the websocket. This loop will exit when the
 	// websocket connection is isClosed and/or returns an error.

pkg/client/interface.go

@@ -22,8 +22,8 @@ import (
 // value which contains either an error or the event message bytes.
 // TODO_HACK: The purpose of this type is to work around gomock's lack of
 // support for generic types. For the same reason, this type cannot be an
-// alias (i.e. EventsBytesObservable = observable.Observable[either.Either[[]byte]]).
-type EventsBytesObservable observable.Observable[either.Either[[]byte]]
+// alias (i.e. EventsBytesObservable = observable.Observable[either.Bytes]).
+type EventsBytesObservable observable.Observable[either.Bytes]
 
 // EventsQueryClient is used to subscribe to chain event messages matching the given query,
 type EventsQueryClient interface {

pkg/either/types.go

@@ -3,4 +3,7 @@ package either
 // AsyncError represents a value which could either be a synchronous error or
 // an asynchronous error (sent through a channel). It wraps the more generic
 // `Either` type specific for error channels.
-type AsyncError Either[chan error]
+type (
+	AsyncError Either[chan error]
+	Bytes      = Either[[]byte]
+)