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Swap Tokens

Trade one token for another against STRATO's on-chain liquidity pools.

Live quotes

Rates, fees and price impact depend on each pool's reserves and settings. Always check the quote in the app before you confirm.

Before You Start

  • Sign in to app.strato.nexus. You must be signed in to trade.
  • Hold the token you want to sell on STRATO. Use Fund to bridge assets in (Bridge Assets).
  • Keep a little USDST or some vouchers for fees. Every STRATO transaction costs 0.01 USDST, or one voucher if you hold one. A trade usually needs an approval plus the swap, and the Transaction Fee line shows the total.

Step-by-Step

  1. Open Trade from the sidebar (under TRADE). The card is titled Trade your assets.
  2. From: pick the token you're selling and enter an amount. You can also type the amount you want to receive in To.
  3. To: pick the token you want.

  4. Pick a pool (optional). The app shows a card for each pool that trades this pair, each with its own quote:

    • Classic pool: constant-product pool
    • Stable pool: pool for assets that should trade near par
    • Concentrated liquidity: range-based (V3-style) pool

    The app selects the pool with the best rate. Click a card to use that pool instead. Changing the pair clears your choice.

  5. Review the details:

    • Exchange Rate
    • Price Impact: the gap between the pool's current price and your average price. Larger trades mean higher impact.
    • Transaction Fee
    • Max slippage: Auto or Manual (see below)
  6. Click Trade Assets.
  7. In Confirm Trade, check You pay, You receive, Minimum received (after slippage) and Exchange rate, then confirm.

Your recent trades appear in the history table below the widget (desktop only).

One pool per trade

A trade runs against a single pool. The app doesn't split orders or route through an intermediate token. If no pool trades your pair directly, swap in two steps (for example, token A to USDST, then USDST to token B).

Slippage

Slippage tolerance sets the lowest output you'll accept. If the pool price moves against you before your trade executes and the output would fall below Minimum received, the trade reverts.

  • Auto (default): 1.5 × the quoted price impact, but never below 0.5% or above 5%.
  • Manual: set anywhere from 0.1% to 10% (starts at 0.5%). The app warns you below 0.5% or above 5%.

Pool Types and Swap Fees

The swap fee is taken from the input amount inside the pool. It is separate from the STRATO transaction fee.

Pool type Pricing Swap fee
Classic (Pool) Constant product, x × y = k Factory default 0.30%; can be set per pool (up to 10%). By default 70% goes to liquidity providers and 30% to the protocol fee collector.
Stable (StablePool) StableSwap curve (ported from Curve StableSwap-NG). Low slippage near par; can hold two or more tokens. Base fee set at creation (the factory uses the classic default) with a dynamic multiplier that raises the fee when the pool is off-peg. Half of fees go to the protocol.
Concentrated liquidity (PoolV3) Uniswap-v3-style ranges Fee tier per pool: 0.05%, 0.30% or 1.00%. A configurable share can go to the protocol.

The quote in the app already includes the pool's swap fee.

Common Issues

Message Meaning What to do
Insufficient balance You don't hold enough of the From token Lower the amount
Amount exceeds pool liquidity The pool can't fill this size Trade less, or pick another pool card
No quote / Insufficient liquidity (on a pool card) That pool can't quote this trade Use a different pool
Pool is paused by admin at this time / This pool is disabled Trading in that pool is stopped Pick another pool or wait
Transaction reverted The price moved past your slippage tolerance, or you ran out of fee balance Refresh the quote, raise slippage carefully, or top up USDST or vouchers. A reverted transaction still pays its fee.

Tips

  • Large trades: check Price Impact first. Splitting a trade doesn't reduce the total fee, but it can reduce impact if other traders or arbitrage rebalance the pool in between.
  • Stable pairs: for tokens that should trade near $1 (for example USDST and other stablecoins), a Stable pool card usually quotes best.
  • Verify tokens: check the symbol and icon before trading. Anyone can see pool contents on-chain, but not every token is what its name suggests.

Next Steps