generating randomness

[4meta5]

Mechanisms for generating randomness offer varying levels of security/cost. Random seed is inexpensive but not very secure; VRFs are more expensive and more secure. Likewise, a recipe on randomness should guide developers based on the requirements of their application to navigate this tradeoff between runtime cost and security requirements...

• randomness module PR
• wip recipe

[JoshOrndorff]

When working on the CI, I realized that gen-random didn't compile. I just now realized it's a work in progress. I did a little work fixing compile errors that lives here. https://github.com/substrate-developer-hub/recipes/tree/start-updating-random

There's a cool example of decoupling randomness in paritytech/substrate#3792

[kaichaosun]

The way to generate a random seed seems outdated in recipes.
There is pallet randomness-collective-flip which probably serves this purpose.
cc @JoshOrndorff @jimmychu0807

[JoshOrndorff]

Lucky timing to post this @kaichaosun There is a PR open now #182

[JoshOrndorff]

Review welcome :)