Make your first call
Go from browsing to a settled result with test funds.
A call is a prediction about an asset's price during a Window: one asset, one start, one close. Choose UP or DOWN, pay the amount shown, then wait for the closing result.
Masayume currently uses Somnia Shannon testnet. Trades use test collateral. You can browse first, or try Practice without a wallet.
Start with the asset, opening line and time left. This capture is waiting for its live quote; cost and return must finish loading before review.
- 1Read the opening line and the Window’s closing time.
- 2Choose UP or DOWN for this Window.
- 3Enter the amount you want to stake.
Connect your wallet
Open Markets and choose Connect. Approve the connection in your wallet. If the app shows Wrong network, switch to Somnia Shannon.
Connection lets the app see your address. It does not place an order.
Get test funds
Open the balance pill in the header, or Get test funds in Portfolio. Eligible wallets below 1 STT receive a top-up to 2 STT after a free ownership signature. Once gas is available, confirm the separate 10,000 tUSDC mint in your wallet.
The panel shows the gas allocation and transaction status. If the allocation is unavailable, use its external STT faucet links. Wallet setup explains eligibility and recovery after a cancelled prompt.
Choose a Window and a side
Pick an asset and a live Window. UP wins when the final oracle price is at or above the opening print. DOWN wins when it is below.
Choose Up or Down in Your call. Start with the ordinary wallet route and 1× for a first order.
Review and place
Enter Bet amount. Read Current cost, Return and the time left. Choose Buy UP for … or Buy DOWN for ….
Your first order may need an approval for tUSDC followed by the order itself. Wait for the app's result. A wallet signature alone does not confirm that an order filled.
Watch and collect
Open Portfolio → Your bets → Open. Once the Window has a final result, winning wallet positions appear under To collect. Choose Claim all or Collect it now and confirm the collection transaction.
The timer reaching zero does not move winnings into your wallet by itself.
If the quote changes, review the new amount before trying again. If a transaction's outcome is unknown, open its explorer link first. The complete trade guide covers partial fills, closing Windows and quote blockers.
Source notes
This guide follows the application code reviewed on 2026-09-07. Links point to that reviewed commit and require repository access. GitHub may show 404 if you are signed out or do not have access.