glisten to validation configuration, fix uint conversion

# Conflicts:
#	pkg/datastore/transaction_rpc.go
#	pkg/server/datastore.go

Author: alexandernorth

pkg/server/server.go

@@ -275,6 +275,7 @@ func (s *Server) createInitialDatastores(ctx context.Context) {
 
 	for _, dsCfg := range s.config.Datastores {
 		log.Debugf("creating datastore %s", dsCfg.Name)
+		dsCfg.Validation = s.config.Validation
 		go func(dsCfg *config.DatastoreConfig) {
 			defer wg.Done()
 			// TODO: handle error

pkg/utils/leaf_convert.go

@@ -140,16 +140,26 @@ func ConvertSdcpbNumberToUint64(mm *sdcpb.Number) (uint64, error) {
 	return mm.Value, nil
 }
 
-func ConvertSdcpbNumberToInt64(mm *sdcpb.Number) (int64, error) {
-	if mm.Value > math.MaxInt64 {
-		return 0, fmt.Errorf("error converting %d to int64 overflow", mm.Value)
+func intAbs(x int64) uint64 {
+	ui := uint64(x)
+	if x < 0 {
+		return ^(ui) + 1
 	}
+	return ui
+}
 
+func ConvertSdcpbNumberToInt64(mm *sdcpb.Number) (int64, error) {
 	if mm.Negative {
+		if mm.Value > intAbs(math.MinInt64) {
+			return 0, fmt.Errorf("error converting -%d to int64: overflow", mm.Value)
+		}
 		return -int64(mm.Value), nil
-	} else {
-		return int64(mm.Value), nil
 	}
+
+	if mm.Value > math.MaxInt64 {
+		return 0, fmt.Errorf("error converting %d to int64 overflow", mm.Value)
+	}
+	return int64(mm.Value), nil
 }
 
 func convertUint(value string, minMaxs []*sdcpb.SchemaMinMaxType, ranges *URnges) (*sdcpb.TypedValue, error) {