Add item DataComponent implements (part 1)

level/component/repaircost.go

@@ -0,0 +1,28 @@
+package component
+
+import (
+	"io"
+
+	pk "github.com/Tnze/go-mc/net/packet"
+)
+
+var _ DataComponent = (*RepairCost)(nil)
+
+type RepairCost struct {
+	Cost pk.VarInt
+}
+
+// ID implements DataComponent.
+func (RepairCost) ID() string {
+	return "minecraft:repair_cost"
+}
+
+// ReadFrom implements DataComponent.
+func (r *RepairCost) ReadFrom(reader io.Reader) (n int64, err error) {
+	return r.Cost.ReadFrom(reader)
+}
+
+// WriteTo implements DataComponent.
+func (r *RepairCost) WriteTo(writer io.Writer) (n int64, err error) {
+	return r.Cost.WriteTo(writer)
+}