Read the news.
Beat the ship.
A harbour stock exchange on Portaldot. News arrives by ship, and every share price is a live pool on the chain’s native DEX.
On-chain trading feels like a spreadsheet. On-chain games fake the market.
DEX screens are for experts
Pools, slippage and fees, with nothing that tells a newcomer why a price should move or what to do about it.
Trading games don’t trade
Most keep made-up prices on a server. Nothing settles, so nothing teaches you how a real pool behaves.
News games need fair timing
If the operator knows the headline first, the game is rigged. Players have to be able to check who knew what, and when.
The first stock exchange grew up on a harbour.
In 1600s Amsterdam, a ship coming in, or not, moved the share price of the company that sent it. Portside plays that same game with five stocks people talk about today, each with its own pier.
NVDA chips
AAPL phones
TSLA cars
AMZN parcels
META headsets
One headline. One ship. One decision.
News is drawn
The Harbour contract picks a stock, a kind of news and a size: “Earnings beat · NVDA ▲ 12%”.
Trade before it docks
Buy before good news, sell before bad. Every trade is a real swap signed in the browser.
The ship docks
One public house swap moves that pool by exactly the posted amount. Right call, right money.
Tide, then rumours
Prices drift a quarter of the way back. A minute before the next round, rumour holders hear the next ship.
A living harbour, not a price table
Six kinds of news. Three push a stock up, two push it down.
The size of each move, 5% to 29%, is on the card. The skill is in timing and sizing, and in selling into the move before the tide pulls it back.
A proper game site around the harbour
Daily missionsThree a day, the same for every captain, like “Sell before a fall”.12 badgesFrom First trade to Admiral, plus streaks of right calls.Rumours25 DUCAT paid on-chain to hear the next ship a minute early. Two a day.Season podiumHighest net worth takes the Admiral’s flag; daily champions are anchored.PortfolioHoldings, average cost, P&L and a net worth chart for every captain.Share cardOne tap turns a win into an image for X, with the harbour behind it.Nobody knows the next ship. Not even us.
Commit, then reveal
The keeper commits to a secret seed a round ahead and must reveal that exact seed to the contract.
Block hash mixed in
The contract mixes the seed with the previous block hash, so the keeper can’t choose or predict a headline.
Docking is one public swap
When a ship lands, one house swap moves the pool by exactly the posted amount. Anyone can check its size.
Rumours don’t change the draw
A ticket only reveals the contract’s next draw a minute early. Standings are anchored daily as a Merkle root.