feat: add valset change and block info service to runtime (#15811)

Co-authored-by: Aaron Craelius <aaron@regen.network>

runtime/services.go

@@ -1,9 +1,12 @@
 package runtime
 
 import (
+	"context"
+
 	appv1alpha1 "cosmossdk.io/api/cosmos/app/v1alpha1"
 	autocliv1 "cosmossdk.io/api/cosmos/autocli/v1"
 	reflectionv1 "cosmossdk.io/api/cosmos/reflection/v1"
+	abci "github.com/cometbft/cometbft/abci/types"
 
 	"github.com/cosmos/cosmos-sdk/runtime/services"
 	"github.com/cosmos/cosmos-sdk/types/module"
@@ -21,3 +24,24 @@ func (a *App) registerRuntimeServices(cfg module.Configurator) error {
 
 	return nil
 }
+
+// ======================================================
+// ValidatorUpdateService & BlockInfoService
+// ======================================================
+
+// ValidatorUpdateService is the service that runtime will provide to the module that sets validator updates.
+type ValidatorUpdateService interface {
+	SetValidatorUpdates(context.Context, []abci.ValidatorUpdate)
+}
+
+// BlockInfoService is the service that runtime will provide to modules which need Comet block information.
+type BlockInfoService interface {
+	GetHeight() int64                // GetHeight returns the height of the block
+	Misbehavior() []abci.Misbehavior // Misbehavior returns the misbehavior of the block
+	GetHeaderHash() []byte           // GetHeaderHash returns the hash of the block header
+	// GetValidatorsHash returns the hash of the validators
+	// For Comet, it is the hash of the next validators
+	GetValidatorsHash() []byte
+	GetProposerAddress() []byte            // GetProposerAddress returns the address of the block proposer
+	GetDecidedLastCommit() abci.CommitInfo // GetDecidedLastCommit returns the last commit info
+}