Questions tagged [random]
The random tag has no usage guidance.
9
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How to generate random number of a specific length in Substrate pallet
I want to generate random number of a specific length. I can't use insecure-randomness-collective-flip because it's not recommended for production.
I also can't use rand package because it doesn't ...
- 413
2
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1
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33
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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 ...
- 523
3
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1
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53
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What does `no particular order` mean for storage iterations?
I am always curious what the documentation for the storage means when I see the following.
Enumerate all elements in the map in no particular order.
https://paritytech.github.io/substrate/master/...
- 523
1
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193
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Is the random number generation safe for pallet_lottery?
I read this post of Shawn https://substrate.stackexchange.com/a/128/2484 and found out, that random numbers for lotteries are not reliable, even with VRF on GRANDPA since the validators could earn ...
- 523
1
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125
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Test panic with Randomness::random() 'attempt to subtract with overflow'
Sorry for the title but I don't know how to explain it better.
I have this simple custom pallet and I try to test the create_random_number dispatchable function with a simple assert_ok! but I get this ...
- 97
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59
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How to use "A secure, local entropy source for random number generation" in offchain worker?
The official website tells us there is " A secure, local entropy source for random number generation" . I think it means that I can make use of this feature to generate random number or even ...
- 161
4
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2
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367
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Generating random numbers in ink!
I've been trying to use most common
let mut rng = rand::thread_rng();
let winner_pos = rng.gen_range(0..10);
way to get a random number and use it in one of the contract's messages. But it throws a ...
- 474
4
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1
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74
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On-chain pseudo-random numbers - agreed by all
I'm looking for a source of random numbers - doesn't need to be cryptographically secure, just hard to predict in advance but agreed by and visible to all participants. I'm thinking about using the ...
7
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2
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522
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Secure random number generation?
I've been watching Substrate_ tutorials for a while now, with the goal of learning a little more about their technology.
My question is:
Would random number generation using Randomness be feasible in ...
- 73