Suppress scope value owner migration events.

.changelog/unreleased/improvements/2195-hide-md-mig-events.md

@@ -0,0 +1 @@
+* Suppress the events emitted during the metadata migration that changes how scope value owners are recorded [PR 2195](https://github.com/provenance-io/provenance/pull/2195).

internal/sdk/events.go

@@ -0,0 +1,46 @@
+package sdk
+
+import (
+	abci "github.com/cometbft/cometbft/abci/types"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/gogoproto/proto"
+)
+
+// NoOpEventManager is an event manager that satisfies the sdk.EventManagerI interface, but does nothing.
+type NoOpEventManager struct{}
+
+var _ sdk.EventManagerI = (*NoOpEventManager)(nil)
+
+// NewNoOpEventManager returns a new event manager that does nothing.
+func NewNoOpEventManager() *NoOpEventManager {
+	return &NoOpEventManager{}
+}
+
+// Events returns sdk.EmptyEvents().
+func (x NoOpEventManager) Events() sdk.Events {
+	// Returning sdk.EmptyEvents() here (instead of nil) to match sdk.EventManager behavior.
+	return sdk.EmptyEvents()
+}
+
+// ABCIEvents returns sdk.EmptyABCIEvents().
+func (x NoOpEventManager) ABCIEvents() []abci.Event {
+	// Returning sdk.EmptyABCIEvents() here (instead of nil) to match sdk.EventManager behavior.
+	return sdk.EmptyABCIEvents()
+}
+
+// EmitTypedEvent ignores the provided argument, does nothing, and always returns nil.
+func (x NoOpEventManager) EmitTypedEvent(_ proto.Message) error {
+	return nil
+}
+
+// EmitTypedEvents ignores the provided arguments, does nothing, and always returns nil.
+func (x NoOpEventManager) EmitTypedEvents(_ ...proto.Message) error {
+	return nil
+}
+
+// EmitEvent ignores the provided event and does nothing.
+func (x NoOpEventManager) EmitEvent(_ sdk.Event) {}
+
+// EmitEvents ignores the provided events and does nothing.
+func (x NoOpEventManager) EmitEvents(_ sdk.Events) {}

x/metadata/keeper/migrations_v4.go

@@ -10,12 +10,20 @@ import (
 	"github.com/cosmos/cosmos-sdk/types/address"
 	"github.com/cosmos/gogoproto/proto"
 
+	internalsdk "github.com/provenance-io/provenance/internal/sdk"
 	markertypes "github.com/provenance-io/provenance/x/marker/types"
 	"github.com/provenance-io/provenance/x/metadata/types"
 )
 
 // Migrate3To4 will update the metadata store from version 3 to version 4. This should be part of the viridian upgrade.
 func (m Migrator) Migrate3To4(ctx sdk.Context) error {
+	// This migration emits too many events and can cause problems with nodes due to its size.
+	// So we'll just throw all of them away by swapping in a different event manager here.
+	// But the testnet migration already ran using v1.20.0-rc2 which included all of the events in the block result.
+	// So, to keep v1.20.0-rc2 and v1.20.0 state compatible, we only throw out the events when not on a testnet.
+	if sdk.GetConfig().GetBech32AccountAddrPrefix() != "tp" {
+		ctx = ctx.WithEventManager(internalsdk.NewNoOpEventManager())
+	}
 	logger := m.keeper.Logger(ctx)
 	logger.Info("Starting migration of x/metadata from 3 to 4.")
 	if err := migrateValueOwners(ctx, newKeeper3To4(m.keeper)); err != nil {