Check and avoid duplicates at BitCannaID.Bcnaid

x/bcna/keeper/bitcannaid.go

@@ -8,6 +8,24 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
+// Check if the BitCannaID exist previously
+func (k Keeper) HasBitcannaidWithBcnaid(ctx sdk.Context, bcnaid string) bool {
+	store := ctx.KVStore(k.storeKey)
+	iterator := sdk.KVStorePrefixIterator(store, []byte(types.BitcannaidKey))
+
+	defer iterator.Close()
+	for ; iterator.Valid(); iterator.Next() {
+		var bitcannaid types.Bitcannaid
+		k.cdc.MustUnmarshal(iterator.Value(), &bitcannaid)
+
+		if bitcannaid.Bcnaid == bcnaid {
+			return true
+		}
+	}
+
+	return false
+}
+
 // GetBitcannaidCount get the total number of bitcannaid
 func (k Keeper) GetBitcannaidCount(ctx sdk.Context) uint64 {
 	store := prefix.NewStore(ctx.KVStore(k.storeKey), []byte{})

x/bcna/keeper/msg_server_bitcannaid.go

@@ -12,6 +12,10 @@ import (
 func (k msgServer) CreateBitcannaid(goCtx context.Context, msg *types.MsgCreateBitcannaid) (*types.MsgCreateBitcannaidResponse, error) {
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
+	// Check if a BitCannaID with the same Bcnaid already exists
+	if k.HasBitcannaidWithBcnaid(ctx, msg.Bcnaid) {
+		return nil, sdkerrors.Wrapf(types.ErrDuplicateBitcannaid, "BitCannaID with Bcnaid %s already exists", msg.Bcnaid)
+	}
 	var bitcannaid = types.Bitcannaid{
 		Creator: msg.Creator,
 		Bcnaid:  msg.Bcnaid,
@@ -31,6 +35,10 @@ func (k msgServer) CreateBitcannaid(goCtx context.Context, msg *types.MsgCreateB
 func (k msgServer) UpdateBitcannaid(goCtx context.Context, msg *types.MsgUpdateBitcannaid) (*types.MsgUpdateBitcannaidResponse, error) {
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
+	// Check if a BitCannaID with the same Bcnaid already exists
+	if k.HasBitcannaidWithBcnaid(ctx, msg.Bcnaid) {
+		return nil, sdkerrors.Wrapf(types.ErrDuplicateBitcannaid, "BitCannaID with Bcnaid %s already exists", msg.Bcnaid)
+	}
 	var bitcannaid = types.Bitcannaid{
 		Creator: msg.Creator,
 		Id:      msg.Id,

x/bcna/types/errors.go

@@ -8,5 +8,5 @@ import (
 
 // x/bcna module sentinel errors
 var (
-	ErrSample = sdkerrors.Register(ModuleName, 1100, "sample error")
+	ErrDuplicateBitcannaid = sdkerrors.Register(ModuleName, 1101, "BitCannaID already exists")
 )