fixes for heimdall v2 init, new msg for updateParams

testutil/sims/app_helpers.go

@@ -47,6 +47,9 @@ var DefaultConsensusParams = &cmtproto.ConsensusParams{
 			cmttypes.ABCIPubKeyTypeEd25519,
 		},
 	},
+	Abci: &cmtproto.ABCIParams{
+		VoteExtensionsEnableHeight: 1,
+	},
 }
 
 // CreateRandomValidatorSet creates a validator set with one random validator

types/module/module.go

@@ -518,10 +518,17 @@ func (m *Manager) InitGenesis(ctx sdk.Context, cdc codec.JSONCodec, genesisData
 		}
 	}
 
+	// TODO HV2: This check is not present in v1.
+	//  As staking is managed on L1,
+	//  and our stake module's InitGenesis does not return []abci.ValidatorUpdate
+	//  we should not need it. Is this assumption correct?
+
 	// a chain must initialize with a non-empty validator set
-	if len(validatorUpdates) == 0 {
-		return &abci.ResponseInitChain{}, fmt.Errorf("validator set is empty after InitGenesis, please ensure at least one validator is initialized with a delegation greater than or equal to the DefaultPowerReduction (%d)", sdk.DefaultPowerReduction)
-	}
+	/*
+		if len(validatorUpdates) == 0 {
+			return &abci.ResponseInitChain{}, fmt.Errorf("validator set is empty after InitGenesis, please ensure at least one validator is initialized with a delegation greater than or equal to the DefaultPowerReduction (%d)", sdk.DefaultPowerReduction)
+		}
+	*/
 
 	return &abci.ResponseInitChain{
 		Validators: validatorUpdates,