Questions tagged [iteration]
The iteration tag has no usage guidance.
5 questions
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Batch insert into StorageMap without iterations
Is there a way to do batch inset operation into a StorageMap without iteration or using a Vec[] type or best workarounds. and if its not whats the reason for not supporting this?
For example there's a ...
- 167
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46
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Concerns about returning all elements from a `StorageDoubleMap`
I defined a storage item as StorageDoubleMap, and I need to provide a method that returns the list of elements with the first key (k1). This getter method has to be provided by the pallet. I found a ...
- 394
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Iterating on a storage from Offchain Worker Concerns
I have a StorageMap named PublicKeyToMsaId which has around 300K inserted items and I want to iterate on all of those keys-values in offchain-worker to create a reverse map in offchain storage.
To ...
- 161
3
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How to check if a `StorageMap` changed after the last access?
I am currently trying to iterate over a storage map over multiple blocks. For this I need to ensure that the StorageMap was not modified.
My plan is to derive a hash from the current StorageMap and ...
- 543
2
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How to select n random keys from a `StorageMap`?
Assume I have the following storage map:
ZAccounts: StorageMap(AccountId -> AccountInfoOf<T>)
Is there a simple way to draw n AccountId's randomly. I assume that I already have a secure ...
- 543