Storage Extra

Additional feature implementation to access cw-storage-plus and cosmwasm-storage

Cow

Cow implementation of storage accessor in cw-storage-plus to provide owned string variant of namespace, useful for constructing the accessor dynamically though format! macro.

Also implements new useful storage accessor, such as ConditionalMultiIndex and CustomDeseMultiIndex

Every struct will have access to new_owned and new_ref constant constructor function.

ItemCow

Like Item from cw-storage-plus but in Cow.

rust let item: ItemCow<Addr> = ItemCow::new_owned(String::from("g")); const ITEM: ItemCow<Addr> = ItemCow::new_ref("g");

MapCow

Like Map from cw-storage-plus but in Cow.

rust let addr_owne: MapCow<&Addr, u64> = MapCow::new_owned(String::from("g")); const ADDR_REF: MapCow<&Addr, u64> = MapCow::new_ref("g");

IndexMapCow

Like IndexedMap from cw-storage-plus but in Cow. Index struct can be construct from normal Index trait, like MultiIndex and UniqueIndex.

MultiIndexCow

Like MultiIndex from cw-storage-plus but in Cow. Also usable in normal IndexedMap.

UniqueIndexCow

Like UniqueIndex from cw-storage-plus but in Cow. Also usable in normal IndexedMap.

```rust

[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]

struct ToIndex { id: u64, count: u64, address: Addr, }

[derive(Clone)]

struct ToIndexList<'a> { count: MultiIndexCow<'a, (U64Key, Vec), ToIndex>, address: UniqueIndexCow<'a, Addr, ToIndex>, }

const TO: IndexedMapCow = IndexedMapCow::newref( "primary", ToIndexList { count: MultiIndexCow::newref("primary", "primarycount", |e, k| { (e.count.into(), k) }), address: UniqueIndexCow::newref("primary_address", |e| e.address.clone()), }, );

let to: IndexedMapCow = IndexedMapCow::newowned( "primary".tostring(), ToIndexList { count: MultiIndexCow::newowned( "primary".tostring(), "primarycount".tostring(), |e, k| (e.count.into(), k), ), address: UniqueIndexCow::newowned("primaryaddress".to_string(), |e| { e.address.clone() }), }, ); ```

CustomDeseMultiIndex

MultiIndexCow with customizable index to pk deserialize function. Also usable in normal IndexedMap.

Use deserialize_multi_kv_custom_pk helper function to map old kv to new kv, also works with a fully customed one.

Use None to operate as normal MultiIndexCow.

```rust

[derive(Serialize, Deserialize, Debug, Clone, PartialEq, PartialOrd)]

struct Test { id: u64, val: Uint128, }

struct TestIndexes<'a> { val: CustomDeseMultiIndex<'a, (U128Key, Vec), Test>, }

fn idm<'a>() -> IndexedMap<'a, U64Key, Test, TestIndexes<'a>> { IndexedMap::new( "test", TestIndexes { val: CustomDeseMultiIndex::newref( |t, _| { ( t.val.u128().into(), U64Key::new(u64::maxvalue() - t.id).joinedkey(), ) }, Some(|s, pk, kv| { deserializemultikvcustompk(s, pk, kv, |oldkv| { U64Key::new( u64::maxvalue() - u64::frombebytes(oldkv.asslice().tryinto().unwrap()), ) .joinedkey() }) }), "test", "test_val", ), }, ) }

```

ConditionalMultiIndex

CustomDeseMultiIndex with addtional condition to save/remove from original indexed map. Useful for reducing composite key complexity. Also usable in normal IndexedMap.

cond_fn must be constant, otherwise might raise unexpected behavior.

```rust

[derive(Serialize, Deserialize, Debug, Clone, PartialEq, PartialOrd)]

struct Test { id: u64, val: Uint128, }

struct TestIndexes<'a> { val: ConditionalMultiIndex<'a, (U128Key, Vec), Test>, }

fn idm<'a>() -> IndexedMap<'a, U64Key, Test, TestIndexes<'a>> { IndexedMap::new( "test", TestIndexes { val: ConditionalMultiIndex::newref( |t, k| (t.val.u128().into(), k), // only add to val if t.val > 100 |t| t.val.u128() > 100, None, "test", "test_val", ), }, ) }

```d