add query to get cctx error message

go.mod

@@ -337,7 +337,6 @@ require (
 	github.com/bnb-chain/tss-lib v1.5.0
 	github.com/showa-93/go-mask v0.6.2
 	github.com/tonkeeper/tongo v1.9.3
-	gotest.tools v2.2.0+incompatible
 )
 
 require (

x/crosschain/keeper/cctx.go

@@ -81,6 +81,23 @@ func (k Keeper) GetCrossChainTx(ctx sdk.Context, index string) (val types.CrossC
 	return val, true
 }
 
+// GetCrossChainTxError returns the error message for a given cctx index.
+func (k Keeper) GetCrossChainTxError(ctx sdk.Context, index string) (errMsg string, found bool) {
+	var cctx types.CrossChainTx
+
+	p := types.KeyPrefix(fmt.Sprintf("%s", types.CCTXKey))
+	store := prefix.NewStore(ctx.KVStore(k.storeKey), p)
+
+	b := store.Get(types.KeyPrefix(index))
+	if b == nil {
+		return "", false
+	}
+
+	k.cdc.MustUnmarshal(b, &cctx)
+
+	return cctx.CctxStatus.ErrorMessage, true
+}
+
 // GetAllCrossChainTx returns all cctxs
 func (k Keeper) GetAllCrossChainTx(ctx sdk.Context) (list []types.CrossChainTx) {
 	p := types.KeyPrefix(fmt.Sprintf("%s", types.CCTXKey))

x/crosschain/keeper/cctx_test.go

@@ -169,8 +169,13 @@ func TestCCTXs(t *testing.T) {
 				send, found := keeper.GetCrossChainTx(ctx, s.Index)
 				require.True(t, found)
 				require.Equal(t, s, send)
+				err, found := keeper.GetCrossChainTxError(ctx, s.Index)
+				require.True(t, found)
+				require.Equal(t, "", err)
 			}
-
+			err, found := keeper.GetCrossChainTxError(ctx, "does-not-exist")
+			require.False(t, found)
+			require.Equal(t, "", err)
 		})
 	}
 }

x/crosschain/types/status_test.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
-	"gotest.tools/assert"
 
 	"github.com/zeta-chain/node/x/crosschain/types"
 )