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PrimeSwap V3 DEX

PrimeSwap V3 is a concentrated liquidity DEX on Mersennet, built on the Uniswap V3 protocol. It enables capital-efficient liquidity positions with custom price ranges and multiple fee tiers—giving liquidity providers fine-grained control over where their capital is deployed.

Overview​

FeaturePrimeSwap V3
ArchitectureUniswap V3 fork
LiquidityConcentrated (custom price ranges)
Fee Tiers0.05%, 0.3%, 1%
Position TypeNFT-based (ERC-721)
ChainMersennet Testnet (Chain ID 7919)
Frontendhttp://46.225.30.187:4002

V3 vs V2​

FeaturePrimeSwap V2PrimeSwap V3
Liquidity ModelFull range (x × y = k)Concentrated (custom ranges)
Capital Efficiency1×Up to 4000× for narrow ranges
Fee Tiers0.3% only0.05%, 0.3%, 1%
Position RepresentationFungible LP tokens (ERC-20)Non-fungible positions (ERC-721 NFT)
Best ForSimple swaps, passive LPsActive LPs, stablecoin pairs, advanced strategies

Key Concepts​

Concentrated Liquidity​

Unlike V2 where liquidity is spread across the entire price curve (0 to ∞), V3 lets LPs choose a specific price range. Liquidity is only active when the current price is within that range, resulting in higher fee earnings per unit of capital.

Fee Tiers​

Each pool is created with one of three fee tiers, allowing the market to express different risk profiles:

Fee TierBest ForExample Pairs
0.05%Stable pairs with minimal price movementUSDC/USDT, USDC/DAI
0.3%Standard volatile pairsWPRIM/USDC, WPRIM/USDT
1%Exotic or high-volatility pairsNew tokens, low-liquidity assets

NFT Position Management​

Each liquidity position is represented as an ERC-721 NFT, managed through the NonfungiblePositionManager contract. The NFT encodes the pool, price range (tick bounds), and liquidity amount.

Core Contracts​

ContractPurpose
UniswapV3FactoryCreates and tracks V3 pools with fee tier configuration
SwapRouterUser-facing swap execution across V3 pools
NonfungiblePositionManagerMint, modify, and burn concentrated liquidity positions (NFTs)
QuoterOff-chain quote simulation for swap amounts
info

V3 contract addresses are listed on the Ecosystem Directory and Deployed Contracts pages.

Adding Concentrated Liquidity​

To provide liquidity in V3, you select a token pair, fee tier, and price range:

INonfungiblePositionManager.MintParams memory params = INonfungiblePositionManager.MintParams({
    token0: USDC,
    token1: WPRIM,
    fee: 3000,           // 0.3% fee tier
    tickLower: -887220,  // lower bound of price range
    tickUpper: 887220,   // upper bound of price range
    amount0Desired: 1000e6,
    amount1Desired: 1000e18,
    amount0Min: 0,
    amount1Min: 0,
    recipient: msg.sender,
    deadline: block.timestamp + 1200
});

(uint256 tokenId, uint128 liquidity, uint256 amount0, uint256 amount1) =
    nonfungiblePositionManager.mint(params);

Swapping on V3​

Use the SwapRouter for exact-input or exact-output swaps:

ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams({
    tokenIn: USDC,
    tokenOut: WPRIM,
    fee: 3000,
    recipient: msg.sender,
    deadline: block.timestamp + 1200,
    amountIn: 100e6,
    amountOutMinimum: 0,
    sqrtPriceLimitX96: 0
});

uint256 amountOut = swapRouter.exactInputSingle(params);