brk: first commit

_src/structs/empty_address_data.rs

@@ -0,0 +1,37 @@
+use allocative::Allocative;
+use snkrj::{direct_repr, Storable, UnsizedStorable};
+
+use super::{AddressData, AddressType, Amount};
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Default, Allocative)]
+pub struct EmptyAddressData(u64);
+direct_repr!(EmptyAddressData);
+
+const SHIFT: u64 = 5;
+const AND: u64 = (1 << SHIFT) - 1;
+const MAX: u64 = (u64::MAX - 1) >> 5;
+
+impl EmptyAddressData {
+    pub fn from_non_empty(non_empty: &AddressData) -> Self {
+        if non_empty.sent != non_empty.received {
+            dbg!(&non_empty);
+            panic!("Trying to convert not empty wallet to empty !");
+        }
+
+        let transfered = non_empty.sent.to_sat();
+
+        if transfered >= MAX {
+            panic!("Too large !");
+        }
+
+        Self((transfered << SHIFT) + (non_empty.address_type as u64))
+    }
+
+    pub fn address_type(&self) -> AddressType {
+        (self.0 & AND).try_into().unwrap()
+    }
+
+    pub fn transfered(&self) -> Amount {
+        Amount::from_sat(self.0 >> SHIFT)
+    }
+}