# Overview

Create for each validator corresponding to 1 pool reward. Requirements:

Staking token & reward token: RON
The amount of reward is equal to % staked amount in the pool.
- Staking ratio $x\%$ of the pool ⇒ $rewardAmount = x\% * totalReward$
- IE: Staking ratio $50\%$ ⇒ $rewardAmount= 50\% * totalReward$
The reward will be distributed at the end of each period ($1 \ period = x \ epoch ,\ \forall x \in \N^*$).

## Problem Statement

Create a staking pool that rewards each user staking %. The reward will be distributed only once at the end of the block:

Block	Action	Total staking	Pool Reward	User Reward
i + 0	-	-	-	-
i + 1	◦ User A: +100	100	100	UserA+=100
i + 2	◦ User B: +100	200	100	UserA+=50, UserB+=50
i + 3	-	200	100	UserA+=50, UserB+=50
i + 4	-	200	-	-
i + 5	◦ User A: +200	400	-
i + 6	-	400	100	UserA+=75, UserB+=25
i + 7	-	400	-	-
Sum			400	UserA=275,UserB=125

Entity	Behavior
Pool reward	◦ Record reward at the current block
~~◦ Clear the pending reward (when being slashed)
◦ Commit the pending reward~~
User	◦ Stake/unstake
◦ Claim reward
◦ Peek (~~pending~~/claimable) reward

Let $rps_i$ be the reward earned when the user stake 1 token into the pool at block $i$:

$$ rps_i\leftarrow \frac{reward_i}{totalBalance_i} $$