diff --git a/domain/structures.go b/domain/structures.go
new file mode 100644
index 0000000..d954b59
--- /dev/null
+++ b/domain/structures.go
@@ -0,0 +1,105 @@
+package minecraftgame
+
+type JavaVersion struct {
+	VersionNums `json:"version"`
+	Specifics   []struct {
+		Os   string `json:"os"`
+		Arch string `json:"arch"`
+		URL  string `json:"URL"`
+		Sha1 string `json:"SHA1"`
+	} `json:"specifics"`
+}
+
+type VersionNums struct {
+	Major string `json:"major"`
+	Minor string `json:"minor"`
+	Patch string `json:"patch"`
+}
+
+type Version struct {
+	AssetIndex AssetIndex `json:"assetIndex"`
+	Downloads  struct {
+		Client Artifact `json:"client"`
+		Server Artifact `json:"server"`
+		Mods   struct {
+			Required []ModArtifact `json:"required"`
+		} `json:"mods"`
+	} `json:"downloads"`
+	ID        string `json:"id"`
+	Libraries []Lib  `json:"libraries"`
+	//ClientLog LogCfg
+	MainClass string `json:"mainClass"`
+	GameArgs  []Argument
+	JVMArgs   []Argument
+	Type      string `json:"type"`
+}
+
+type AssetIndex struct {
+	ID        string `json:"id"`
+	TotalSize uint64 `json:"totalSize"`
+	Artifact
+}
+
+type Argument struct {
+	Value string `json:"value"`
+	Rules []Rule `json:"rules"`
+}
+
+type Rule struct {
+	Action RuleAct `json:"action" mapstructure:"action"`
+	// OS information. All fields are regexes.
+	OS struct {
+		Name    string `json:"name" mapstructure:"name"`
+		Version string `json:"version" mapstructure:"version"`
+		Arch    string `json:"arch" mapstructure:"arch"`
+	} `json:"os" mapstructure:"os"`
+	Features struct {
+		IsDemoUser          *bool `json:"is_demo_user" mapstructure:"is_demo_user"`
+		HasCustomResolution *bool `json:"has_custom_resolution" mapstructure:"has_custom_resolution"`
+	} `json:"features" mapstructure:"features"`
+}
+
+type RuleAct string
+
+const (
+	ActAllow    RuleAct = "allow"
+	ActDisallow RuleAct = "disallow"
+)
+
+type LibClassifiers struct {
+	JavaDoc      *Artifact `json:"javadoc"`
+	NativesLinux *Artifact `json:"natives-linux"`
+	NativesMacOS *Artifact `json:"natives-osx"`
+	NativesWin   *Artifact `json:"natives-windows"`
+	Sources      *Artifact `json:"sources"`
+}
+
+type Lib struct {
+	Downloads struct {
+		MainJar        *Artifact `json:"artifact"`
+		LibClassifiers `json:"classifiers"`
+	} `json:"downloads"`
+	NativeSuffixes struct {
+		Linux   string `json:"linux"`
+		MacOS   string `json:"osx"`
+		Windows string `json:"windows"`
+	} `json:"natives"`
+	Name         string `json:"name"`
+	Rules        []Rule `json:"rules"`
+	ExtractRules struct {
+		Exclude []string `json:"exclude"`
+	} `json:"extract"`
+}
+
+type Artifact struct {
+	SHA1 string `json:"sha1"`
+	Size uint64 `json:"size"`
+	URL  string `json:"url"`
+}
+
+type ModArtifact struct {
+	Artifact
+	File    string
+	Name    string
+	Version string
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..b23aa27
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module git.gregbrzezinski.com/Skirda/sharedutils
+
+go 1.18