topsoil_core/storage/
bounded_vec.rs

1// This file is part of Soil.
2
3// Copyright (C) Soil contributors.
4// Copyright (C) Parity Technologies (UK) Ltd.
5// SPDX-License-Identifier: Apache-2.0 OR GPL-3.0-or-later WITH Classpath-exception-2.0
6
7//! Traits, types and structs to support putting a bounded vector into storage, as a raw value, map
8//! or a double map.
9
10use crate::{
11	storage::{StorageDecodeLength, StorageTryAppend},
12	traits::Get,
13};
14pub use subsoil::runtime::{BoundedSlice, BoundedVec};
15
16impl<T, S> StorageDecodeLength for BoundedVec<T, S> {}
17
18impl<T, S: Get<u32>> StorageTryAppend<T> for BoundedVec<T, S> {
19	fn bound() -> usize {
20		S::get() as usize
21	}
22}
23
24#[cfg(test)]
25pub mod test {
26	use super::*;
27	use crate::{traits::ConstU32, Twox128};
28	use subsoil::io::TestExternalities;
29	use subsoil::runtime::bounded_vec;
30
31	#[crate::storage_alias]
32	type Foo = StorageValue<Prefix, BoundedVec<u32, ConstU32<7>>>;
33
34	#[crate::storage_alias]
35	type FooMap = StorageMap<Prefix, Twox128, u32, BoundedVec<u32, ConstU32<7>>>;
36
37	#[crate::storage_alias]
38	type FooDoubleMap =
39		StorageDoubleMap<Prefix, Twox128, u32, Twox128, u32, BoundedVec<u32, ConstU32<7>>>;
40
41	#[test]
42	fn decode_len_works() {
43		TestExternalities::default().execute_with(|| {
44			let bounded: BoundedVec<u32, ConstU32<7>> = bounded_vec![1, 2, 3];
45			Foo::put(bounded);
46			assert_eq!(Foo::decode_len().unwrap(), 3);
47		});
48
49		TestExternalities::default().execute_with(|| {
50			let bounded: BoundedVec<u32, ConstU32<7>> = bounded_vec![1, 2, 3];
51			FooMap::insert(1, bounded);
52			assert_eq!(FooMap::decode_len(1).unwrap(), 3);
53			assert!(FooMap::decode_len(0).is_none());
54			assert!(FooMap::decode_len(2).is_none());
55		});
56
57		TestExternalities::default().execute_with(|| {
58			let bounded: BoundedVec<u32, ConstU32<7>> = bounded_vec![1, 2, 3];
59			FooDoubleMap::insert(1, 1, bounded);
60			assert_eq!(FooDoubleMap::decode_len(1, 1).unwrap(), 3);
61			assert!(FooDoubleMap::decode_len(2, 1).is_none());
62			assert!(FooDoubleMap::decode_len(1, 2).is_none());
63			assert!(FooDoubleMap::decode_len(2, 2).is_none());
64		});
65	}
66}
topsoil_core/storage/bounded_vec.rs

topsoil_core/storage/
bounded_vec.rs
