Initial stake module specs

[shanev]

Fixes #3.

This wraps the Cosmos x/staking module, making delegations unbond after a certain period of time.

Storing delegations with a key tuple of expire_time | post_id | stake_id in a FIFO queue.

post_id: tweet id
stake_id: auto-incrementing uint64 for each like

This allows the end blocker to only peek the first element on each block. Then it can get all stakes for a post by iterating on expire_time | post_id , and pop each element when processed. So only currently active stakes are stored on chain.

It will be the duty of the the indexer to keep track of stake and tweet relationships long-term.

[jhernandezb]

Looks good to me, just have one thought.

Is it maybe too soon to add a vendor_id ? like
DelegationQueue: 0x01 | format(expire_time) | vendor_id | post_id | stake_id -> Delegation

[shanev]

Looks good to me, just have one thought.

Is it maybe too soon to add a vendor_id ? like
DelegationQueue: 0x01 | format(expire_time) | vendor_id | post_id | stake_id -> Delegation

Excellent point. Added vendor_id.