# Randomness Module
The Randomness Collective Flip module provides a [`random`](https://docs.rs/pallet-randomness-collective-flip/latest/pallet_randomness_collective_flip/struct.Module.html#method.random)
function that generates low-influence random values based on the block hashes from the previous
`81` blocks. Low-influence randomness can be useful when defending against relatively weak
adversaries. Using this pallet as a randomness source is advisable primarily in low-security
situations like testing.
## Public Functions
See the [`Module`](https://docs.rs/pallet-randomness-collective-flip/latest/pallet_randomness_collective_flip/struct.Module.html) struct for details of publicly available functions.
## Usage
### Prerequisites
Import the Randomness Collective Flip module and derive your module's configuration trait from
the system trait.
### Example - Get random seed for the current block
```rust
use frame_support::{decl_module, dispatch, traits::Randomness};
pub trait Trait: frame_system::Trait {}
decl_module! {
pub struct Module<T: Trait> for enum Call where origin: T::Origin {
#[weight = 0]
pub fn random_module_example(origin) -> dispatch::DispatchResult {
let _random_value = <pallet_randomness_collective_flip::Module<T>>::random(&b"my context"[..]);
Ok(())
}
}
}
```
License: Apache-2.0