Mezo Pools

Mezo Pools enable users to swap tokens and provide liquidity using optimized pool mechanics. Mezo supports two pool architectures: basic pools (constant-product and stable-curve AMMs) and concentrated liquidity (CL) pools with custom price ranges.

Basic Pools

Basic pools use an Aerodrome-style AMM with either constant-product (volatile) or stable-curve (stable) pricing.

Pool Factory: 0x83FE469C636C4081b87bA5b3Ae9991c6Ed104248
Swap Fees: 0.30% for volatile pools, 0.02% for stable pools
Position Type: Fungible LP tokens (ERC-20)

Supported Basic Pools

Pool	Type	Address
MUSD/BTC	Volatile	`0x52e604c44417233b6CcEDDDc0d640A405Caacefb`
MUSD/mUSDC	Stable	`0xEd812AEc0Fecc8fD882Ac3eccC43f3aA80A6c356`
MUSD/mUSDT	Stable	`0x10906a9E9215939561597b4C8e4b98F93c02031A`

Basic Swap Flow

Router Contract: 0x16A76d3cd3C1e3CE843C6680d6B37E9116b5C706

User approves token to router
Call router’s swapExactTokensForTokens(...) with path array
Output token returned to wallet

Concentrated Liquidity (CL) Pools

CL pools allow liquidity providers to deposit within custom price ranges, concentrating capital where trading occurs. Mezo’s CL implementation is based on Velodrome’s Slipstream.

CL Factory: 0xBB24AF5c6fB88F1d191FA76055e30BF881BeEb79
Position Type: Non-fungible (ERC-721 NFTs via NonfungiblePositionManager)
Price Model: sqrtPriceX96 (Q64.96 fixed-point), same as Uniswap V3

Supported CL Pools

Pool	Tick Spacing	Default Fee	Address
BTC/MUSD-200	200	0.30%	See explorer

Tick Spacing and Fees

CL pools are created with a specific tick spacing that determines the granularity of price ranges. Pools with tick spacing below 100 are classified as stable; 100 and above are volatile.

Tick Spacing	Default Fee
1	0.01%
10	0.05%
50	0.05%
100	0.05%
200	0.30%
2,000	1.00%

Custom fees can be set via a pluggable swapFeeModule on the factory. An unstakedFeeModule controls the portion of swap fees redirected from unstaked to staked positions (default: 10%).

CL Swap Flow

CL Swap Router: 0x37cDd11919ec3860eaD9efB8673d7476E5326225

User approves token to CL swap router
Call exactInputSingle(...) or exactInput(...) with pool key (token0, token1, tickSpacing) and swap parameters
Output token returned to wallet

CL Position Management

NonfungiblePositionManager: 0x509Bc221df2B83927c695FA0bb0f5B21053C874c

Positions are managed as ERC-721 NFTs. Key operations:

mint(...) — Create a new position with a price range (tickLower, tickUpper) and deposit tokens
increaseLiquidity(...) — Add more liquidity to an existing position
decreaseLiquidity(...) — Remove liquidity from a position
collect(...) — Claim accumulated swap fees

Staking and Gauges

CL positions can be staked into gauges for MEZO emissions. Staked in-range liquidity earns both swap fees and emissions. The unstaked fee mechanism redirects a portion of fees from unstaked positions to staked ones.

CL Gauge Factory: 0xfc41E1AAe0e58E8bDC32e85d8C995A902FEdEb13

Key Features

Slippage Control: Provided on frontend or via amountOutMinimum / sqrtPriceLimitX96 parameters
Built-in TWAP Oracle: Each CL pool maintains a time-weighted average price oracle
Dynamic Fees: Pluggable fee modules for custom fee logic per pool

Contract Addresses

Mainnet — Basic Pool Contracts

Name	Address
Router	`0x16A76d3cd3C1e3CE843C6680d6B37E9116b5C706`
PoolFactory	`0x83FE469C636C4081b87bA5b3Ae9991c6Ed104248`
MUSD/BTC Pool	`0x52e604c44417233b6CcEDDDc0d640A405Caacefb`
MUSD/mUSDC Pool	`0xEd812AEc0Fecc8fD882Ac3eccC43f3aA80A6c356`
MUSD/mUSDT Pool	`0x10906a9E9215939561597b4C8e4b98F93c02031A`

Mainnet — CL Contracts

Name	Address
CLFactory	`0xBB24AF5c6fB88F1d191FA76055e30BF881BeEb79`
CLPool (implementation)	`0x819CfAdd7F5bc0854FA3B7F5749ea0410a943E5F`
CLSwapRouter	`0x37cDd11919ec3860eaD9efB8673d7476E5326225`
NonfungiblePositionManager	`0x509Bc221df2B83927c695FA0bb0f5B21053C874c`
NonfungibleTokenPositionDescriptor	`0x818f6CcFbEe90202B967567bCF2a5Fb9B73CFEcA`
CLGaugeFactory	`0xfc41E1AAe0e58E8bDC32e85d8C995A902FEdEb13`
CLGauge (implementation)	`0x8f11a90265f7a784B46fe326638Ec37a5CC29c33`

Mainnet — Governance Contracts

Name	Address
VeBTC	`0x7D807e9CE1ef73048FEe9A4214e75e894ea25914`
VeBTCVoter	`0x3A4a6919F70e5b0aA32401747C471eCfe2322C1b`
VeBTCRewardsDistributor	`0x535E01F948458E0b64F9dB2A01Da6F32E240140f`
VeBTCEpochGovernor	`0x1494102fa1b240c3844f02e0810002125fb5F054`
ChainFeeSplitter	`0xcb79aE130b0777993263D0cdb7890e6D9baBE117`

Testnet — Basic Pool Contracts

Name	Address
Router	`0x9a1ff7FE3a0F69959A3fBa1F1e5ee18e1A9CD7E9`
PoolFactory	`0x4947243CC818b627A5D06d14C4eCe7398A23Ce1A`
MUSD/BTC Pool	`0xd16A5Df82120ED8D626a1a15232bFcE2366d6AA9`
MUSD/mUSDC Pool	`0x525F049A4494dA0a6c87E3C4df55f9929765Dc3e`
MUSD/mUSDT Pool	`0x27414B76CF00E24ed087adb56E26bAeEEe93494e`

Testnet — CL Contracts

Name	Address
CLFactory	`0x7B61BC8Aa460476d142F1CD107A47297002f69ff`
CLPool (implementation)	`0xfB28eA9eC9f01775bD42E92BafeE9584808419CD`
CLSwapRouter	`0x3112908bB72ce9c26a321Eeb22EC8e051F3b6E6a`
NonfungiblePositionManager	`0x9B753e11bFEd0D88F6e1D2777E3c7dac42F96062`
NonfungibleTokenPositionDescriptor	`0xD6018646aE1d7fAA849D2369e6157050051F0e51`
CLGaugeFactory	`0x5b0dbAfdcE363d6662F36163D91862B0a3808373`
CLGauge (implementation)	`0x1aE1a27b709A5eb4BbcF7B7AA2c28620c593a3EE`

Testnet — Governance Contracts

Name	Address
VeBTC	`0xB63fcCd03521Cf21907627bd7fA465C129479231`
VeBTCVoter	`0x72F8dd7F44fFa19E45955aa20A5486E8EB255738`
VeBTCRewardsDistributor	`0x10B0E7b3411F4A38ca2F6BB697aA28D607924729`
VeBTCEpochGovernor	`0x12fda93041aD8aB6d133aE4d038b5159033d937a`
ChainFeeSplitter	`0x63aD4D014246eaD52408dF3BC8F046107cbf6065`