v1 preblock is different than v2

core/appmodule/module.go

@@ -48,11 +48,17 @@ type HasPrecommit interface {
 // It can modify consensus parameters in storage and signal the caller through the return value.
 // When it returns ConsensusParamsChanged=true, the caller must refresh the consensus parameter in the finalize context.
 // The new context (ctx) must be passed to all the other lifecycle methods.
-type ResponsePreBlock = appmodule.ResponsePreBlock
+type ResponsePreBlock interface {
+	IsConsensusParamsChanged() bool
+}
 
 // HasPreBlocker is the extension interface that modules should implement to run
 // custom logic before BeginBlock.
-type HasPreBlocker = appmodule.HasPreBlocker
+type HasPreBlocker interface {
+	AppModule
+	// PreBlock is method that will be run before BeginBlock.
+	PreBlock(context.Context) (ResponsePreBlock, error)
+}
 
 // HasServices is the extension interface that modules should implement to register
 // implementations of services defined in .proto files.

core/appmodule/v2/comet.go

@@ -2,18 +2,10 @@ package appmodule
 
 import "context"
 
-// ResponsePreBlock represents the response from the PreBlock method.
-// It can modify consensus parameters in storage and signal the caller through the return value.
-// When it returns ConsensusParamsChanged=true, the caller must refresh the consensus parameter in the finalize context.
-// The new context (ctx) must be passed to all the other lifecycle methods.
-type ResponsePreBlock interface {
-	IsConsensusParamsChanged() bool
-}
-
 // HasPreBlocker is the extension interface that modules should implement to run
 // custom logic before BeginBlock.
 type HasPreBlocker interface {
 	AppModule
 	// PreBlock is method that will be run before BeginBlock.
-	PreBlock(context.Context) (ResponsePreBlock, error)
+	PreBlock(context.Context) error
 }