feat: custom pricing

closes #3

src/provisioner/mod.rs

@@ -1,7 +1,62 @@
 mod capacity;
 mod lnvps;
 mod network;
+mod pricing;
 
 pub use capacity::*;
 pub use lnvps::*;
+use lnvps_db::{DiskInterface, DiskType, VmCustomTemplate, VmTemplate};
 pub use network::*;
+pub use pricing::*;
+
+pub trait Template {
+    fn cpu(&self) -> u16;
+    fn memory(&self) -> u64;
+    fn disk_size(&self) -> u64;
+    fn disk_type(&self) -> DiskType;
+    fn disk_interface(&self) -> DiskInterface;
+}
+
+impl Template for VmTemplate {
+    fn cpu(&self) -> u16 {
+        self.cpu
+    }
+
+    fn memory(&self) -> u64 {
+        self.memory
+    }
+
+    fn disk_size(&self) -> u64 {
+        self.disk_size
+    }
+
+    fn disk_type(&self) -> DiskType {
+        self.disk_type
+    }
+
+    fn disk_interface(&self) -> DiskInterface {
+        self.disk_interface
+    }
+}
+
+impl Template for VmCustomTemplate {
+    fn cpu(&self) -> u16 {
+        self.cpu
+    }
+
+    fn memory(&self) -> u64 {
+        self.memory
+    }
+
+    fn disk_size(&self) -> u64 {
+        self.disk_size
+    }
+
+    fn disk_type(&self) -> DiskType {
+        self.disk_type
+    }
+
+    fn disk_interface(&self) -> DiskInterface {
+        self.disk_interface
+    }
+}