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* Add markdown linting - add linter default rules - adapt rules to current code - fix the code for linting to pass - add CI check fix #1243 * Fix markdown for Substrate * Fix tooling install * Fix workflow * Add documentation * Remove trailing spaces * Update .github/.markdownlint.yaml Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> * Fix mangled markdown/lists * Fix captalization issues on known words
55 lines
1.8 KiB
Markdown
55 lines
1.8 KiB
Markdown
# DO NOT USE IN PRODUCTION
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The produced values do not fulfill the cryptographic requirements for random numbers. Should not be used for high-stake
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production use-cases.
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# Randomness Module
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The Randomness Collective Flip module provides a
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[`random`](https://docs.rs/pallet-insecure-randomness-collective-flip/latest/pallet_insecure_randomness_collective_flip/struct.Module.html#method.random)
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function that generates low-influence random values based on the block hashes from the previous `81` blocks.
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Low-influence randomness can be useful when defending against relatively weak adversaries. Using this pallet as a
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randomness source is advisable primarily in low-security situations like testing.
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## Public Functions
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See the
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[`Module`](https://docs.rs/pallet-insecure-randomness-collective-flip/latest/pallet_insecure_randomness_collective_flip/struct.Module.html)
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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 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::traits::Randomness;
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#[frame_support::pallet]
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pub mod pallet {
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use super::*;
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use frame_support::pallet_prelude::*;
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use frame_system::pallet_prelude::*;
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#[pallet::pallet]
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pub struct Pallet<T>(_);
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#[pallet::config]
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pub trait Config: frame_system::Config + pallet_insecure_randomness_collective_flip::Config {}
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#[pallet::call]
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impl<T: Config> Pallet<T> {
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#[pallet::weight(0)]
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pub fn random_module_example(origin: OriginFor<T>) -> DispatchResult {
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let _random_value = <pallet_insecure_randomness_collective_flip::Pallet<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
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