STON.fi: TON liquidity pools, cross-chain swaps and locked STON staking

STON.fi operates automated spot liquidity pools on TON. Traders exchange tokens against those pools, while liquidity providers supply inventory and receive a proportional pool claim. Farming and STON governance staking are additional contract activities. Their returns, withdrawal conditions and assets at risk differ from a completed spot swap; they should be assessed as separate positions.[3]

The current swap guide routes the public interface through Omniston. A user selects the assets and amount, reviews the output and transaction parameters, and confirms through the wallet. Routing can aggregate connected liquidity instead of using only one STON.fi pool. The pool brand, quoted route and final settlement mechanism therefore deserve separate attention.[5]

Omniston’s current operational matrix spans 13 chains, including TON, TRON, Ethereum, Base, Arbitrum and HyperEVM. Its cross-chain asset list is largely stablecoins, with chain-specific contracts. A chain appearing in that matrix does not mean every token, amount or direction has liquidity. The request-for-quote response determines whether the selected route can currently be quoted.[8]

Cross-chain orders use linked hash-and-time-locked settlement. The trader funds the source side and a resolver supplies destination liquidity. Completion, cancellation and rollback have distinct windows; refundability is conditional on the actual stage reached. An order may have several executions or partial fills, so cancelling an eligible unfilled remainder does not reverse completed exchanges.[9]

For liquidity provision, the guide offers a balanced deposit and V2 arbitrary-ratio deposits, including a single-sided choice. Previewed pool share and resulting position matter more than the amount typed into one token field. The deposited inventory can change as swaps occur, and the LP token represents the pool claim rather than a fixed entitlement to the original quantities.[12]

At the default 0.30% tariff, a 1,000-unit swap has a 3-unit pool fee: 2 units for LPs and 1 for the protocol. This calculation excludes price impact, route-specific charges and network costs. The current pool page or API supplies the applicable fee; a protocol-wide default is insufficient to price a particular execution.[4]

Pool APR is a backward-looking activity estimate. TVL measures the value currently deposited, while 24-hour volume measures recent turnover; neither is interest owed to an LP. A large pool can have little fee-generating activity. Conversely, a busy smaller pool can expose a trade to appreciable price impact. Read the metrics together and account for changes in the value and composition of the deposited assets.[33]

The gas guide uses GRAM as the label for TON-network fee amounts. Its reservation figures describe the TON transaction flow, not a universal cost for EVM or TRON settlement. Network fees remain separate from pool trading fees, and a wallet must retain spendable gas even when the asset being exchanged is a stablecoin.[6]

The cross-chain guide requires the correct source and destination wallet details and sufficient source-chain assets. Moving between chains is a funded settlement process, not merely selecting another network in a wallet. Confirm the token contract, receiving network and destination before signing. The June 2026 launch examples in the guide are dated illustrations; the maintained Omniston matrix and current quote determine present coverage.[7]

A TON wallet connection shares the address and allows signature requests; it does not by itself send the wallet’s assets to the exchange. The documented connection can persist until the user disconnects or clears browser data. Moving between devices may require reconnection. An existing connection and a previously signed transaction are separate states, so disconnecting does not cancel an operation already onchain.[17]

On EVM routes, token spending may use an EIP-2612 permit, Permit2 or a conventional ERC-20 approval. Permit2 can require an initial onchain authorisation followed by signed permissions. Check the spender, token, amount and validity when approving. Ending the website session does not revoke a contract allowance; that follows from the distinction between a browser connection and an onchain spending permission.[10]

The farming exit guide says unstaking also claims unclaimed rewards; an ended farm can show a combined Remove and claim action. Neither action alone means the underlying trading pair is back in the wallet. After the LP tokens return, use the pool withdrawal flow and choose a partial amount or the full position as required.[14]

A separate developer refund method concerns tokens sent to an LP account but not yet incorporated into the pool. It builds a wallet-signed refund request for that pending balance. This is distinct from withdrawing an existing LP position, and it should not be interpreted as a general reversal function for completed swaps or a promise that support can recover any mistaken transfer.[22]

Self-custody of wallet keys does not mean every committed asset stays freely spendable in the wallet. Pool, farm, staking and settlement contracts impose their own states. The V2 router reference documents administrative trading locks, fee changes and upgrades: router locking blocks swaps and liquidity additions, while pool locking can block swaps and liquidity withdrawals. It specifies seven days for code upgrades and two days for administrator changes.[21]

The security index lists a January 2025 Trail of Bits DEX V2 review, a separate TON Tech escrow review, monitoring and a bug-bounty route. This review inspected the published index rather than every underlying report and deployed-code match. The index gives no verified customer insurance limit, named policy entitlement or commitment to reimburse every loss.[20]

Token behaviour adds another layer of risk. The current labelling policy blocks tokens classified as fake or honeypots. Suspicious and DMCA-marked assets require address-based discovery and warnings. It also describes limited support for taxed tokens with a transfer tax no higher than 10%, only at route endpoints. That narrower current policy supersedes older blanket descriptions that all taxed tokens are unsupported.[19]

Wallet recovery remains the holder’s responsibility. The wallet guide says support cannot restore a lost recovery phrase and will never request it. A local device password protects access to that wallet installation; it is not a central STON.fi account password whose reset restores blockchain ownership. Recovery also cannot remove a separately chosen staking lock.[18]

The May 2025 interface terms require legal majority and capacity, prohibit use where unlawful and exclude sanctioned or restricted persons. They also prohibit VPN circumvention by ineligible users. They give no exhaustive country matrix, so public documentation or a functioning wallet connection is insufficient to confirm a particular resident’s eligibility.[26]

The acceptable-use policy permits restrictions involving the interface, addresses and tokens and prohibits unlawful activity or service abuse. Frontend availability and blockchain contract accessibility are consequently different questions. A technical ability to submit a transaction does not waive an access restriction, and a token visible through another interface may remain unavailable through STON.fi’s own interface.[27]

The help centre provides a request form with an email response route and identifies STONfi_support_bot on Telegram. It distinguishes that support route from announcements at stonfidex and the stonfichat community. The inspected page gives no response-time guarantee, staffed dealing desk or service commitment to cancel transactions during an outage.[24]

For a liquidity withdrawal problem, the help page first directs users to check the wallet’s native-gas balance and the My pools withdrawal flow, then contact support. Establish the transaction status and affected pool before retrying: an interface error alone does not identify whether an onchain action failed or completed. A support ticket is assistance, not an alternative signed withdrawal instruction.[25]

The terms call for an initial dispute email, allow 100 days from its sending for resolution, and then specify British Virgin Islands arbitration in English before one or three arbitrators. Their governing-law clause is not evidence that a particular company is incorporated or licensed there.[26]

An exact registered interface counterparty, registration jurisdiction and exchange-specific financial permission were not established from the reviewed terms. This limits the ability to identify a legally accountable service provider. The accessible interface terms still describe the TON-only architecture, while current product documentation covers additional chains.[26]

Ston Foundation is named as the governance administrator. The governance rules retain Foundation discretion over implementation, so a community vote does not automatically execute every proposal or create contractual investor rights. Those governance powers explain decision-making within the project; they are separate from permission granted by a financial regulator.[30]

The homepage displayed approximately $8 billion in cumulative trading volume, six million all-time swappers, 37 million swaps and $27 million in TVL when checked on 20 October 2026. These are provider-reported website figures with different units and no common displayed measurement timestamp. All-time wallet participation is not a verified count of registered people or currently active traders.[2]

The current press room names Slavik Baranov as CEO, Alexey Papirovskiy as CPO and Dmitriy Malinovskiy as CFO. It describes Omniston’s 2025 introduction as an aggregation layer and its subsequent cross-chain role. The press room contains older scale panels alongside newer descriptions; those panels have not been combined with the homepage figures into a purported current market ranking.[35]

Integration versions also matter. The current Omniston reference is v1beta8; it says support for v1beta6 ended on 1 June and v1beta7 on 1 September. An old integration guide may therefore describe an unsupported API flow. These software-version transitions should not be read as automatic migration of every user’s liquidity or permission to ignore an existing contract position.[32]

Operator

STON.fi protocol and interface; Ston Foundation administers governance. An exact registered interface counterparty was not established.

Exchange model

Decentralised

Service scope

TON AMM pools, Omniston-routed swaps and cross-chain orders, LP farming and locked STON governance staking. Quotes and settlement depend on the selected route.

Client types

Retail clients; Professional clients

Pricing publication

Public pricing

Other names

STON.fi DEX; STON.fi V2

Funding scope

Fund a compatible source-chain wallet and retain native gas. Cross-chain flows use destination-wallet details; farm exits and pool removal are separate transactions. No native bank account was verified.

Custody and asset handling

Wallets authorise transactions; pool, farm, staking and cross-chain contracts subsequently hold committed assets. V2 administrators retain documented locking and upgrade powers.

Client eligibility

Legal majority, capacity and lawful access are required. Sanctioned or otherwise prohibited users are excluded; the terms provide no exhaustive eligible-country list.

Support

Official help-request form and STONfi_support_bot on Telegram; published community channels supplement assistance. No guaranteed response or emergency dealing time was verified.

Authorisation and registration scope

No exact licensed interface counterparty or exchange-specific financial permission was independently verified. Foundation governance and contract administration are distinct from financial authorisation.

Exchange metadata checked 20 Oct 2026Source 1Source 2Source 3Source 4Source 7Source 8Source 15Source 21Source 24Source 26Source 34

STON staking issues non-transferable ARKENSTON governance weight and GEMSTON community-related tokens. The chosen lock prevents early redemption, including a partial withdrawal. The governance site currently describes lock choices from three to 24 months. Longer voting weight or receipt-token quantities should not be confused with guaranteed growth in the underlying STON principal.[15][29]

The published Boost Farm programme concerns the STON/USDt V2 pool: 500 or more staked STON can qualify for up to a 1.5-times boost, and 1,000 for up to two times. Eligible liquidity is capped at $10,000, rewards are in STON, and both the campaign and stake must be active. No exact current reward window was established, so these conditions are not presented as an immediately withdrawable cash bonus.[16]

DAO voting follows a discussion and voting process, with seven days of discussion and 14 days of voting described on the governance site. A late quorum or outcome change can extend voting by 72 hours. Votes already cast cannot be altered. Token-based participation is therefore a timed governance action, distinct from transferring a token or closing a trading position.[29]

The DEX API exposes pool and related accounting data, including V1/V2 accrual and vault information. Its documentation says some externally routed protocol fees are outside that REST API’s coverage. Reconciling a wallet can therefore require more than one data source. A complete tax statement, cost-basis calculation and universally available CSV export were not verified; preserve transaction hashes, networks and position records.[23]

The privacy policy covers device, IP and contact information, and describes retaining contact data until a deletion request. That is a personal-data policy, not a guarantee that an exchange will retain a complete tax ledger indefinitely. The reviewed pages did not establish an inactivity tariff or an account-deactivation schedule applicable to blockchain-held positions.[28]

STON.fi’s Docs Assistant answers questions from documentation. Its help page explicitly says it does not connect to the blockchain or execute transactions. It therefore has no documented authority to approve spending, place a trade or recover funds. A suggested answer still needs checking against the relevant contract generation and the wallet transaction presented for signature.[31]