Ex/Import missing LastInstanceID key

x/wasm/internal/keeper/genesis.go

@@ -29,6 +29,9 @@ func InitGenesis(ctx sdk.Context, keeper Keeper, data types.GenesisState) {
 		keeper.setContractState(ctx, contract.ContractAddress, contract.ContractState)
 	}
 
+	for _, seq := range data.Sequences {
+		keeper.setAutoIncrementID(ctx, seq.IDKey, seq.Value)
+	}
 }
 
 // ExportGenesis returns a GenesisState for a given context and keeper.
@@ -67,5 +70,13 @@ func ExportGenesis(ctx sdk.Context, keeper Keeper) types.GenesisState {
 		return false
 	})
 
+	// types.KeyLastCodeID is updated via keeper create
+	for _, k := range [][]byte{types.KeyLastInstanceID} {
+		genState.Sequences = append(genState.Sequences, types.Sequence{
+			IDKey: k,
+			Value: keeper.peekAutoIncrementID(ctx, k),
+		})
+	}
+
 	return genState
 }

x/wasm/internal/keeper/genesis_test.go

@@ -24,8 +24,9 @@ func TestGenesisExportImport(t *testing.T) {
 	wasmCode, err := ioutil.ReadFile("./testdata/contract.wasm")
 	require.NoError(t, err)
 
+	// store some test data
 	f := fuzz.New().Funcs(FuzzAddr, FuzzAbsoluteTxPosition, FuzzContractInfo, FuzzStateModel)
-	for i := 0; i < 20; i++ {
+	for i := 0; i < 25; i++ {
 		var (
 			codeInfo    types.CodeInfo
 			contract    types.ContractInfo
@@ -57,7 +58,7 @@ func TestGenesisExportImport(t *testing.T) {
 	for i := 0; srcIT.Valid(); i++ {
 		require.True(t, dstIT.Valid(), "destination DB has less elements than source. Missing: %q", srcIT.Key())
 		require.Equal(t, srcIT.Key(), dstIT.Key(), i)
-		require.Equal(t, srcIT.Value(), dstIT.Value(), i)
+		require.Equal(t, srcIT.Value(), dstIT.Value(), "element (%d): %s", i, srcIT.Key())
 		srcIT.Next()
 		dstIT.Next()
 	}

x/wasm/internal/keeper/keeper.go

@@ -485,6 +485,23 @@ func (k Keeper) autoIncrementID(ctx sdk.Context, lastIDKey []byte) uint64 {
 	return id
 }
 
+// peekAutoIncrementID reads the current value without incrementing it.
+func (k Keeper) peekAutoIncrementID(ctx sdk.Context, lastIDKey []byte) uint64 {
+	store := ctx.KVStore(k.storeKey)
+	bz := store.Get(lastIDKey)
+	id := uint64(1)
+	if bz != nil {
+		id = binary.BigEndian.Uint64(bz)
+	}
+	return id
+}
+
+func (k Keeper) setAutoIncrementID(ctx sdk.Context, lastIDKey []byte, val uint64) {
+	store := ctx.KVStore(k.storeKey)
+	bz := sdk.Uint64ToBigEndian(val)
+	store.Set(lastIDKey, bz)
+}
+
 func addrFromUint64(id uint64) sdk.AccAddress {
 	addr := make([]byte, 20)
 	addr[0] = 'C'

x/wasm/internal/types/genesis.go

@@ -2,10 +2,16 @@ package types
 
 import sdk "github.com/cosmos/cosmos-sdk/types"
 
+type Sequence struct {
+	IDKey []byte `json:"id_key"`
+	Value uint64 `json:"value"`
+}
+
 // GenesisState is the struct representation of the export genesis
 type GenesisState struct {
 	Codes     []Code     `json:"codes"`
 	Contracts []Contract `json:"contracts"`
+	Sequences []Sequence `json:"sequences"`
 }
 
 // Code struct encompasses CodeInfo and CodeBytes