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https://github.com/pezkuwichain/pezkuwi-subxt.git
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Benjamin Kampmann
2416aa7999
* Bump version * update test-utils crates to be ready for publishing * adding changelog * Adding automaticly generated READMEs * fixing versions * another version mishap
38 lines
1.1 KiB
Markdown
38 lines
1.1 KiB
Markdown
# Randomness Module
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The Randomness Collective Flip module provides a [`random`](./struct.Module.html#method.random)
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function that generates low-influence random values based on the block hashes from the previous
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`81` blocks. Low-influence randomness can be useful when defending against relatively weak
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adversaries. Using this pallet as a randomness source is advisable primarily in low-security
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situations like testing.
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## Public Functions
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See the [`Module`](./struct.Module.html) struct for details of publicly available functions.
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## Usage
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### Prerequisites
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Import the Randomness Collective Flip module and derive your module's configuration trait from
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the system trait.
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### Example - Get random seed for the current block
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```rust
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use frame_support::{decl_module, dispatch, traits::Randomness};
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pub trait Trait: frame_system::Trait {}
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decl_module! {
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pub struct Module<T: Trait> for enum Call where origin: T::Origin {
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#[weight = 0]
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pub fn random_module_example(origin) -> dispatch::DispatchResult {
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let _random_value = <pallet_randomness_collective_flip::Module<T>>::random(&b"my context"[..]);
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Ok(())
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}
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}
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}
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```
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License: Apache-2.0 |