Questions tagged [boundedvec]
The boundedvec tag has no usage guidance.
20
questions
2
votes
1
answer
26
views
Data structure to choose for ordered items?
Can someone help me understand the difference b/w using a Vec (BoundedVec) instead of a StorageMap for storing ordered items? Basically inside a vector, the index would be an indicator of order ...
- 3,632
2
votes
1
answer
28
views
How to convert a u32 into a BoundedVec compatible format?
I am using a BoundedVec as the id for a storage map, and intend to transform a u32 value into a compatible format. Is there a streamlined way to accomplish this, or should I split the u32 into smaller ...
- 55
1
vote
2
answers
39
views
Update the way to limit a boundedvec
I've developing a pallet where I'm using the following custom data type to save a CID: types.rs
pub type CID = BoundedVec<u8, ConstU32<100>>;
I want to change the way I limit that ...
- 45
1
vote
1
answer
58
views
Substrate BoundedVec Error Cannot Borrow as mutable
I have substrate pallet structure as follows
#[derive(
Encode, Decode, CloneNoBound, PartialEqNoBound, Eq, RuntimeDebugNoBound, TypeInfo, MaxEncodedLen,
...
- 343
6
votes
1
answer
197
views
Prepare pallets for Weights v2
I am trying to prepare the pallets for Weights v2 at Encointer and a couple of questions arose.
Where can I find documentation on what exactly has to be done in terms of bounded types?
What is the ...
- 73
4
votes
2
answers
84
views
What should be the maximum size of a `BoundedVec`?
What is the recommended maximum number of bytes to store within a BoundedVec?
I am currently having the following struct:
#[derive(
parity_scale_codec::Decode,
parity_scale_codec::Encode,
...
- 483
2
votes
1
answer
46
views
Does it make sense to convert Vec<Vec<u8>> to Vec<BoundedVec<u8, DescriptionLimit>>? [duplicate]
I have a scenario where I have to store multiple strings. For single string, we can use BoundedVec<u8, DescriptionLimit>, that's why I converted Vec<u8> into BoundedVec<u8, ...
- 403
2
votes
1
answer
85
views
BoundedVec on ink!
BoundedVec is a vector where the length of the queue is always bounded, which is better than Vec for storage because it has a defined a maximum length.
I recommend this StackExchange questions to ...
- 5,014
1
vote
1
answer
47
views
How to store a bounded map inside `StorageValue`?
I need to query a specific account id associated with a Balance in a pool of 10_000 account ids. But I also need to iterate over all account ids in a reasonable amount of computation time.
So my ...
- 483
0
votes
1
answer
42
views
frame_benchmarking convert Vec to BoundedVec
I am unable to get benchmarks to work after changing an extrinsic argument from Vec<u8> to a custom type which is a BoundedVec defined in the pallet pallets config.
Can someone provide me with ...
- 53
0
votes
1
answer
37
views
How to benchmark huge bounded vectors?
I want to have a queue system in a pallet using a storage value and a bounded vector.
/// Data related to tranmission queues.
#[pallet::storage]
#[pallet::getter(fn at_block_queue)]
pub type ...
- 177
1
vote
2
answers
416
views
How to create a bounded vec from a normal vec?
Some pallet that I am configuring requires it's genesis configuration to have a BoundedVec. The problem I'm facing is getting to cast a Vec as a BoundedVec. How can I do this? I have taken care of ...
- 502
3
votes
1
answer
56
views
What happens when a bounded vec in storage is fully populated and then its bound is reduced?
Consider the following scenario, where I have a BoundedVec which has bound parameter MaxItems. Now this MaxItems parameter would be configured in the runtime.
pub type StorageItem<T: Config<I>...
- 329
3
votes
1
answer
90
views
Error defining BoundedVec as a Pallet Storage the trait `Decode` is not implemented for `sp_runtime::BoundedVec
I have a StorageValue defined as follows
#[pallet::storage]
#[pallet::getter(fn reg_students)]
pub type RegStudents<T: Config> =
StorageValue<_, BoundedVec<StudentId, T:...
- 343
1
vote
0
answers
18
views
BoundedBTreeMap error with Debug trait
Consider the following snippet
#[weight = 100_000_000] //TODO: update weights
pub fn test(
_origin,
_outputs: frame_support::BoundedBTreeSet<JoyBalanceOf<...
- 161
2
votes
1
answer
70
views
Why BoundedVec does not implement a Decode trait
A clear explanation will be appreciated as to why Decode trait is not implemented while encode is. What are the design reason for this?
- 763
2
votes
1
answer
76
views
Use BoundedVec in benchmark
I have some code that benchmarks one of my extrinsic.
benchmarks! {
create_supersig {
let z in 0 .. 10;
let alice: T::AccountId = get_account::<T>("ALICE");
...
1
vote
0
answers
53
views
Extrinsic's string parameter lower bound validation
I want to validate the extrinsic string parameters like name, title, cid, etc. The type should be capable of min/max length validation. And checking the lower bound is impossible with the current ...
- 148
5
votes
1
answer
95
views
Issue with #[pallet::generate_storage_info]
I was digging into substrate's storage_info macro https://docs.substrate.io/v3/runtime/macros/#palletgenerate_storage_info.
To get hands dirty checked code from
https://github.com/yourarj/substrate-...
- 317
5
votes
2
answers
114
views
How to implement BoundedVec inside an extrinsic?
I need to check if an extrinsic matches "default" inside an extrinsic. The following works:
let bv: BoundedVec<u8, T::StringLimit> = "default".as_bytes().to_vec().try_into()....
- 227