Manta Bridge Deposits Created Yield-Bearing Claims

Between Manta New Paradigm’s Dec. 14, 2023 launch and Dec. 31, deposits reached $565 million, according to Four Pillars’ review of on-chain data; those deposits did not arrive on Manta Pacific as ordinary bridged ETH and USDC, but as STONE and wUSDM. The design made deposited capital usable and yield-bearing, while replacing a simple cross-chain balance with a claim whose value and redemption depend on additional protocols. The $565 million is a campaign-period flow, not a current balance: DefiLlama’s Sept. 6, 2026 snapshot put all assets bridged to Manta at $58.78 million, including about $507,348 of wUSDM.

What token does a Manta Bridge deposit create?

An ETH deposit through New Paradigm created STONE on Manta Pacific, while a USDC deposit created wUSDM. Manta’s launch announcement identified STONE as StakeStone’s non-rebasing omnichain liquid-staking token and wUSDM as wrapped USDM, whose underlying stablecoin accrued Treasury-bill yield.

The verified Ethereum DepositBridge contract shows the ETH mechanism directly: it forwards ETH to a StakeStone vault, receives the amount of STONE minted, then calls STONE’s cross-chain sendFrom function for the Manta destination. The distinction should frame any reading of the Manta Bridge overview: the user is exchanging one economic claim for another, not moving the same token object between ledgers.

• The source asset leaves the user’s Ethereum address.
• A vault or conversion layer issues a yield-bearing claim.
• A cross-chain message credits the mapped ERC-20 on Manta Pacific.
• Redemption follows the receipt token’s bridge and conversion rules.

How is this different from a standard L2 bridge?

A standard canonical bridge normally escrows an L1 asset and credits a mapped L2 representation intended to track it one-for-one. New Paradigm inserted an investment layer: STONE represents staked ETH exposure, while wUSDM wraps a yield-accruing dollar token. That enables collateral, liquidity provision and trading without leaving the L2, but it also adds exchange-rate, liquidity, contract and issuer dependencies.

The yield does not come from Manta validators. For STONE, it originates from Ethereum staking through StakeStone; for wUSDM, Manta said it came from the reserves supporting USDM. Operators therefore should not book that return as sequencer revenue or native protocol issuance. Indexers also must avoid counting the source deposit and destination receipt as two independent pools of capital.

What changes for operators and market makers?

Operators must treat STONE and wUSDM as separate instruments, not cosmetic tickers for ETH and USDC. Wallets need verified contract mappings; indexers need deposit, message and mint reconciliation; lenders need the receipt token’s exchange rate and redemption status; market makers need inventory for the receipt token itself. A broken message, paused redemption or thin exit market can separate the L2 price from the underlying asset even if the accounting remains solvent.

The verdict is favorable for capital efficiency and costly for operational simplicity. Manta turned idle bridge receipts into composable assets, but every integration inherited more counterparties and more states to monitor. The next measurable event is the next monthly bridge snapshot: net withdrawals, outstanding STONE and wUSDM supply, and any persistent discount to their underlying claims will show whether usage is durable rather than incentive-driven.