troubleshooting inferred type error in types/math

types/math/math.go

@@ -5,7 +5,6 @@ import (
 	"cosmossdk.io/errors"
 	"fmt"
 	"github.com/cockroachdb/apd/v2"
-	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
 
 var exactContext = apd.Context{
@@ -49,7 +48,7 @@ func SafeSubBalance(x Dec, y Dec) (Dec, error) {
 	}
 
 	if z.IsNegative() {
-		return z, sdkerrors.ErrInsufficientFunds
+		return z, errNegativeSub
 	}
 
 	return z, nil
@@ -61,8 +60,7 @@ func SafeAddBalance(x Dec, y Dec) (Dec, error) {
 	var z Dec
 
 	if x.IsNegative() || y.IsNegative() {
-		return z, sdkerrors.ErrInvalidRequest.Wrap(fmt.Sprintf("AddBalance() requires two non-negative Dec parameters, but received %s and %s", x, y))
-
+		return z, fmt.Errorf("SafeAddBalance() requires two non-negative Dec parameters, but received %s and %s", x, y)
 	}
 
 	if _, err := exactContext.Add(&z.dec, &x.dec, &y.dec); err != nil {