Port multisig example to low level data structures (#1078)

* Fix `Default` impl of `Mapping` * Replace HashMap by Mapping * Use initialize_contract * Initialize everything within `initialize_contract` * Make owners lazy * Remove commented out code There's no way to get the length of a `Mapping` so it doesn't make sense to check this in tests anymore * Fix - + bug * No need to make a primitive lazy * Clippy Co-authored-by: Hernando Castano <[email protected]>
use-ink · Dec 14, 2021 · bee7f73 · bee7f73
1 parent 82cfba6
commit bee7f73
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diff --git a/crates/storage/src/lazy/mapping.rs b/crates/storage/src/lazy/mapping.rs
@@ -38,12 +38,21 @@ use ink_primitives::Key;
 
 /// A mapping of key-value pairs directly into contract storage.
 #[cfg_attr(feature = "std", derive(scale_info::TypeInfo))]
-#[derive(Default)]
 pub struct Mapping<K, V> {
     offset_key: Key,
     _marker: PhantomData<fn() -> (K, V)>,
 }
 
+/// We implement this manually because the derived implementation adds trait bounds.
+impl<K, V> Default for Mapping<K, V> {
+    fn default() -> Self {
+        Self {
+            offset_key: Default::default(),
+            _marker: Default::default(),
+        }
+    }
+}
+
 impl<K, V> core::fmt::Debug for Mapping<K, V> {
     fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
         f.debug_struct("Mapping")