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tonch is a fully on-chain launchpad. You trade by signing TonConnect transactions from your own wallet — there is no exchange account, no deposit, no withdrawal. Every trade is a Jetton transfer or TON transfer to a curve contract that exists for exactly one token.

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Connecting a wallet

tonch works with any TonConnect-compatible TON wallet:
  • Tonkeeper (mobile + browser extension)
  • MyTonWallet (browser extension + standalone)
  • OpenMask (browser extension)
  • Tonhub (mobile)
Click Connect Wallet at the top of tonch.app and pick your wallet. Approve the connection request — TonConnect only asks for your address, not signing permissions. Each transaction is approved individually when you trade or launch. You’ll need:
  • TON for gas — at minimum ~0.2 TON in the wallet for buys/sells.
  • TON to trade — whatever amount you want to spend on the curve.

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Two trading phases

A Jetton’s price discovery happens in two clearly separated phases.

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Curve phase (before graduation)

Before the curve fills (1,000 TON collected), all trading happens on the per-launch bonding curve. Buys and sells go directly to the curve contract — there is no order book, no market maker, no spread. Price moves deterministically along the virtual constant-product curve as the real TON reserve fills. During this phase:
  • The Jetton can only be bought from or sold back to the curve.
  • Liquidity grows monotonically with each buy. It never leaves until graduation.
  • There is a 1% fee on every buy and sell, taken from the curve and claimable by the deployer.

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DeDust phase (after graduation)

Once the curve hits 1,000 TON, the next graduation transaction migrates all reserves to a TON/Jetton pool on DeDust v2 and locks the LP Jettons. From then on:
  • The original curve contract no longer accepts buys or sells.
  • Trading happens on the DeDust pool like any other Jetton pair.
  • DeDust’s standard fee schedule applies (separate from tonch’s curve fee).
  • Liquidity is locked permanently — it cannot be withdrawn by anyone, including the deployer or the protocol.
See After graduation for how to trade on DeDust.

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Fees you’ll see

WhenFeeWho paysWhere it goes
Curve buy1% of TON inBuyerHeld in the curve, claimable by deployer
Curve sell1% of TON outSellerSame
Network gas~0.05–0.15 TONTraderTON validators (standard)
DeDust tradeDeDust’s fee tierTraderDeDust LPs and protocol
There is no slippage protection on the curve in the sense of an off-chain price oracle — the curve price is the on-chain price, computed deterministically from current reserves at the moment your transaction is processed. If a different trade lands between your quote and your transaction, your fill price will reflect the curve state at execution.

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What you cannot do

  • You cannot trade a Jetton after the curve fills but before graduation finalizes — there is a brief window (usually under a minute) where the curve has crossed the threshold but DeDust seeding hasn’t completed. The frontend will block buys during this window and show a “graduating” state.
  • You cannot withdraw LP after graduation. There is no opcode for it.
  • You cannot get a better-than-curve price as the deployer. The optional dev-buy goes through the same curve.