feat(core/event): make core/event as a type alias of schema/appdata (#21719)

core/CHANGELOG.md

@@ -36,6 +36,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+### Features
+
+* [#21719](https://github.com/cosmos/cosmos-sdk/pull/21719) Make `core/event` as a type alias of `schema/appdata`.
+
 <!-- ## [v1.0.0](https://github.com/cosmos/cosmos-sdk/releases/tag/core%2Fv1.0.0) -->
 ## [v1.0.0-alpha.2](https://github.com/cosmos/cosmos-sdk/releases/tag/core%2Fv1.0.0-alpha.2)
 

core/README.md

@@ -10,7 +10,7 @@ Key features and principles:
 4. Modules depend solely on core APIs for maximum compatibility.
 5. New API additions undergo thorough consideration to maintain stability.
 6. Adheres to a no-breaking-changes policy for reliable dependency management.
-7. Aimed to have zero dependencies, ensuring a lightweight and self-contained foundation.
+7. Aimed to only depend on `schema`, ensuring a lightweight and self-contained foundation.
 
 The core module offers the [appmodule](https://pkg.go.dev/cosmossdk.io/core/appmodule) and [appmodule/v2](https://pkg.go.dev/cosmossdk.io/core/appmodule/v2) packages that include APIs to describe how modules can be written.
 Additionally, it contains all core services APIs that can be used in modules to interact with the SDK, majoritarily via the `appmodule.Environment` struct.

core/event/event.go

@@ -1,29 +1,24 @@
 package event
 
+import "cosmossdk.io/schema/appdata"
+
 // Attribute is a kv-pair event attribute.
-type Attribute struct {
-	Key, Value string
-}
+type Attribute = appdata.EventAttribute
 
 func NewAttribute(key, value string) Attribute {
 	return Attribute{Key: key, Value: value}
 }
 
 // Events represents a list of events.
-type Events struct {
-	Events []Event
-}
+type Events = appdata.EventData
 
 func NewEvents(events ...Event) Events {
 	return Events{Events: events}
 }
 
 // Event defines how an event will emitted
-type Event struct {
-	Type       string
-	Attributes []Attribute
-}
+type Event = appdata.Event
 
 func NewEvent(ty string, attrs ...Attribute) Event {
-	return Event{Type: ty, Attributes: attrs}
+	return Event{Type: ty, Attributes: func() ([]Attribute, error) { return attrs, nil }}
 }

core/go.mod

@@ -7,3 +7,5 @@ go 1.23
 
 // Version tagged too early and incompatible with v0.50 (latest at the time of tagging)
 retract v0.12.0
+
+require cosmossdk.io/schema v0.2.0

core/go.sum

@@ -0,0 +1,2 @@
+cosmossdk.io/schema v0.2.0 h1:UH5CR1DqUq8yP+5Np8PbvG4YX0zAUsTN2Qk6yThmfMk=
+cosmossdk.io/schema v0.2.0/go.mod h1:RDAhxIeNB4bYqAlF4NBJwRrgtnciMcyyg0DOKnhNZQQ=