Metropolis DLMM Vaults Review 2026: Curated Maker Vaults on Sonic

Metropolis DLMM Vaults, called Maker Vaults, are the liquidity-management layer of Metropolis, a Liquidity Book DEX native to the Sonic chain. The project says the vaults are the first curated, non-custodial DLMM vaults in DeFi, where operators run the strategy and depositors earn.

The core product is a set of smart contracts that deploy and manage liquidity into DLMM pools. This spares liquidity providers from rebalancing price bins themselves while keeping funds out of any company's custody.

DefiLlama tracks the product under Liquidity Managers on Sonic, with total value locked of about $235,752 and a 7-day change of -2.2%. It has been listed since January 2026, so it is early-stage and small.

Metropolis is a DEX built on Liquidity Book, a design that splits liquidity into discrete price bins. Within a single bin, trades execute at a fixed price, which is why the project describes trades as zero slippage. Liquidity providers choose which bins to fund, which gives them precise control over where their capital earns fees.

That control takes work, because positions must be adjusted as prices move. Maker Vaults address this. A vault is a smart contract that takes deposits and deploys them into DLMM pools, with a curator or operator managing the positioning. Depositors share in the fees the vault earns.

Metropolis says vaults are non-custodial and fully on-chain, and that users can create and manage their own vault. The result is a liquidity manager on top of the DEX, sitting between passive liquidity provision and fully manual bin management.

The project does not publish vault fees. DLMM pools usually charge trading fees that go to liquidity providers, and vaults may add management or performance fees, but the exact figures for Metropolis are not stated here.

Users would see the actual fee structure on the vault and pool pages in the Metropolis app before depositing. Network gas on Sonic applies to every transaction as well.

Metropolis states that Maker Vaults are fully on-chain and non-custodial, so there is no centralised party holding deposits. That removes counterparty custody risk but not smart-contract risk. DefiLlama lists no audits for this product, and the project does not detail an audit report, so users should look for security documentation themselves. A public security competition for the vault contracts appears in public reporting, but its outcome is not described.

Market risks remain. Concentrated liquidity can lose value relative to holding tokens when prices leave the active range, and vault performance depends on the curator's decisions. TVL is small, which can magnify the impact of any single large deposit or withdrawal. Metropolis does not publish a licence or regulatory status, as is typical for DeFi protocols.

Liquidity providers already active on Sonic who understand impermanent loss and want vault-managed Liquidity Book positions. It also suits strategy operators who want to create their own vault. Beginners and anyone who needs audited, long-tested contracts should be cautious.