feat(client/v2): improve error message on enums (#21936)

(cherry picked from commit dc2cea5)

# Conflicts:
#	client/v2/CHANGELOG.md

client/v2/CHANGELOG.md

@@ -38,7 +38,22 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+<<<<<<< HEAD
 * [#21809](https://github.com/cosmos/cosmos-sdk/pull/21809) Correctly handle enhanced sub commands.
+=======
+### Features
+
+* [#18626](https://github.com/cosmos/cosmos-sdk/pull/18626) Support for off-chain signing and verification of a file.
+* [#18461](https://github.com/cosmos/cosmos-sdk/pull/18461) Support governance proposals.
+
+### Improvements
+
+* [#21936](https://github.com/cosmos/cosmos-sdk/pull/21936) Print possible enum values in error message after an invalid input was provided.
+
+### API Breaking Changes
+
+* [#17709](https://github.com/cosmos/cosmos-sdk/pull/17709) Address codecs have been removed from `autocli.AppOptions` and `flag.Builder`. Instead client/v2 uses the address codecs present in the context (introduced in [#17503](https://github.com/cosmos/cosmos-sdk/pull/17503)).
+>>>>>>> dc2cea5bc (feat(client/v2): improve error message on enums (#21936))
 
 ## [v2.0.0-beta.5] - 2024-09-18
 

client/v2/autocli/flag/enum.go

@@ -58,7 +58,12 @@ func (e enumValue) String() string {
 func (e *enumValue) Set(s string) error {
 	valDesc, ok := e.valMap[s]
 	if !ok {
-		return fmt.Errorf("%s is not a valid value for enum %s", s, e.enum.FullName())
+		var validValues []string
+		for k := range e.valMap {
+			validValues = append(validValues, k)
+		}
+
+		return fmt.Errorf("%s is not a valid value for enum %s. Valid values are: %s", s, e.enum.FullName(), strings.Join(validValues, ", "))
 	}
 	e.value = valDesc.Number()
 	return nil