fix: represent storage in same order in genesis state

golang/cosmos/proto/agoric/swingset/genesis.proto

@@ -10,10 +10,16 @@ option go_package = "github.com/Agoric/agoric-sdk/golang/cosmos/x/swingset/types
 message GenesisState {
     option (gogoproto.equal) = false;
 
-    map<string, string> storage = 1 [
+    repeated StorageEntry storage = 1 [
         (gogoproto.jsontag)    = "storage",
         (gogoproto.moretags)   = "yaml:\"storage\""
     ];
 
     Params params = 2 [(gogoproto.nullable) = false];
 }
+
+// A storage entry.
+message StorageEntry {
+    string key = 1;
+    string value = 2;
+}

golang/cosmos/x/swingset/genesis.go

@@ -14,7 +14,7 @@ import (
 
 func NewGenesisState() *types.GenesisState {
 	return &types.GenesisState{
-		Storage: make(map[string]string),
+		Storage: []*types.StorageEntry{},
 	}
 }
 
@@ -31,7 +31,7 @@ func ValidateGenesis(data *types.GenesisState) error {
 func DefaultGenesisState() *types.GenesisState {
 	return &types.GenesisState{
 		Params:  types.DefaultParams(),
-		Storage: make(map[string]string),
+		Storage: []*types.StorageEntry{},
 	}
 }
 
@@ -44,9 +44,8 @@ type bootstrapBlockAction struct {
 func InitGenesis(ctx sdk.Context, keeper Keeper, data *types.GenesisState) []abci.ValidatorUpdate {
 	keeper.SetParams(ctx, data.GetParams())
 
-	// NONDETERMINISM: order of SetStorage is not deterministic
-	for key, value := range data.Storage {
-		keeper.SetStorage(ctx, key, value)
+	for _, entry := range data.Storage {
+		keeper.SetStorage(ctx, entry.Key, entry.Value)
 	}
 
 	// Just run the SwingSet kernel to finish bootstrap and get ready to open for

golang/cosmos/x/swingset/keeper/keeper.go

@@ -125,17 +125,18 @@ func (k Keeper) SetEgress(ctx sdk.Context, egress *types.Egress) error {
 }
 
 // ExportStorage fetches all storage
-func (k Keeper) ExportStorage(ctx sdk.Context) map[string]string {
+func (k Keeper) ExportStorage(ctx sdk.Context) []*types.StorageEntry {
 	store := ctx.KVStore(k.storeKey)
 	dataStore := prefix.NewStore(store, types.DataPrefix)
 
 	iterator := sdk.KVStorePrefixIterator(dataStore, nil)
 
-	exported := make(map[string]string)
+	exported := []*types.StorageEntry{}
 	defer iterator.Close()
 	for ; iterator.Valid(); iterator.Next() {
 		keyStr := keyToString(iterator.Key())
-		exported[keyStr] = string(iterator.Value())
+		entry := types.StorageEntry{Key: keyStr, Value: string(iterator.Value())}
+		exported = append(exported, &entry)
 	}
 	return exported
 }