how to calculate the voteweight when we vote snft ?

[baoqingli]

Background

According to wormholes economy system，we need to reward snfts to miners. 
wormholes allows users to provide the snfts, so users need competing this.
wormholes will select the snfts  that users provide automatically according to the users' voteweight.

how to calculate the voteweight

voteweight = (currentblocknumber - voteblocknumber) * snftvalue

* currentblocknumber is the current height of the wormholes chain
* voteblocknumber is the height when this user's snft was selected by wormholes chain
* snftvalue is the value of snfts the user have.

[Skips1]

Thank you