Most DeFi users hit this wall: your wallet holds 70% USDT and 30% TON, but classic AMMs force a 50/50 split. You either swap half your stack, paying fees and slippage or sit out.
STON.fi fixes this with arbitrary ratio deposits. For TON's ecosystem, this is the first major AMM to support flexible LP positions, and it changes how capital flows into pools.
Traditional AMMs enforce strict ratio deposits. You need Token A and Token B in exact proportions matching the pool's current price. Before every LP deposit, you run a swap to rebalance. That swap costs fees (0.3-0.5%), incurs slippage, and exposes you to MEV — bots can frontrun your rebalance and extract value before you even enter the pool.
For large positions, this pre-deposit tax hits 0.5-1.5% of your capital.
With STON.fi, you deposit any ratio. 80/20, 100/0, 30/70—the protocol accepts it and rebalances internally in one atomic transaction.
The flow:
1. SDK simulates your deposit and returns expected LP tokens.
2. You submit one transaction with your imbalanced tokens.
3. Contract internally rebalances to maintain pool ratio (x × y = k).
4. You receive LP tokens based on final balanced amounts.
Key point: The rebalancing swap still happens, it's just internal and atomic. You eliminate the MEV window and simplify execution, though fees remain similar.
Treasury holds: 500,000 USDT + 50,000 TON
Pool ratio: 1 TON = 5 USDT (needs 50/50 split)
Traditional approach:
• Swap 250,000 USDT → 49,250 TON (0.3% fee + slippage = $750-1,500)
• Deposit balanced amounts
• Cost: $750-1,500 + MEV exposure
STON.fi:
• Deposit 500,000 USDT + 50,000 TON directly
• Internal rebalancing (0.3% fee = ~$750)
• Cost: ~$750, zero MEV window
The win isn't lower fees—it's atomic execution. No frontrunning opportunity, no multi-step complexity.
Good for:
• Deep pools where your deposit won't significantly impact price
• Large treasuries where MEV exposure matters
• Irregular holdings requiring multiple rebalancing swaps
• Automated strategies eliminating pre-swap logic
Less ideal for:
• Shallow pools (price impact from internal rebalancing can be worse than manual timing)
• Very small deposits (MEV risk is negligible anyway)
This doesn't eliminate impermanent loss or change LP economics. It optimizes execution.
Capital velocity. Telegram-native projects with unbalanced treasuries can LP immediately instead of timing swaps.
Reduced MEV. Single-transaction deposits collapse the frontrunning window. TON's actor model creates different MEV dynamics than Ethereum, but observation and value extraction remain possible.
Composability. Yield aggregators and liquidity managers building on STON.fi don't need complex pre-swap logic. The AMM absorbs that complexity.
Arbitrary liquidity is the foundation for what comes next: concentrated liquidity ranges, multi-hop provisioning, cross-chain liquidity bridging. These only work if base-layer deposits are frictionless.
For projects launching on TON: your treasury can LP organically without maintaining 50/50 ratios. For builders: this is a composability primitive that reduces integration overhead. For TON's DeFi stack: the infrastructure gap with mature chains just got narrower.
STONfi holds the largest TVL on TON and was first to implement arbitrary deposits. DeDust and other DEXs are building competing infrastructure. When choosing where to deploy liquidity, consider pool depth, fee structures, and whether your treasury distribution makes this feature valuable.
Arbitrary deposits don't solve everything, but they remove meaningful execution friction. The protocols that adopt efficient execution early compound that advantage over time.
Disclosure: Technical analysis only. Verify pool conditions before depositing. DeFi protocols carry smart contract risk.
Explore pools on STON.fi and test the mechanics at http://app.ston.fi/pools.
