# 2022-03-31
###### tags: `progress`
###
- round: (time,MIN_PRICE,MAX_PRICE) (limit orders)
- address: the agent that each bid comes from
- bid: (address, type(sell|buy), volume, price,round)
- transaction: (sell_bid, buy_bid, volume, price,round)

### requirements
- validity requirements(bid)
- In every round, each bid's address is unique
- bid_1's price > MIN_PRICE and bid_1's price < MAX_PRICE
- matching requirements(transaction)
- sell_bid.type == sell && buy_bid.type == buy
- sell_bid.price <= tx.price <= buy_bid.price
- tx.volume <= min(sell_bid.volume,buy_bid.volume)
- sum(tx.volume) <= sum(sell_bid.volume)
- matching quality
- seller and buyer's satisfaction
seller: satisfaction ∝ price
buyer: satisfaction ∝ 1/price
- more traded energy
min(sum(sell_bid.volume) - sum(tx.volume))