Assuming the number of full blocks per DS-Epoch is 100 and DS-Committee/Shard size is 100
I understand from the white paper that
the leader of a shard is changed after every successful micro-block and leader of DS-committee is changed after every successful full block
After every DS-Epoch, one new DS node is joined into the DS-Committee and the oldest one is churned out.
Rewards are only distributed to the leader of DS-Committee and the corresponding leader of shards.
Using the above statements, we can see that once a node solves PoW1 and enters in the DS-Committee, then it can become leader (and hence get reward) for 100*50 blocks.
whereas once a node does PoW2 and enters into a shard, it only becomes leader once in that epoch after which she has to again perform PoW2 to enter into a different shard.
Question 1 : Is my understanding correct?
If yes, nodes would be incentivised to always perform PoW1 to earn more rewards?
Question 2 : Let us assume that a node becomes the leader of a shard after initial network sharding during an DS-Epoch.This node would get the reward for the first micro block which would be mined in that shard.
After the first block, what is the incentive for that node to participate in consensus?
Is it the case that the leaders share their rewards among the participating nodes?