RIADeFiPublished by Ketju Research
Not approved · ETH staking

Ketju memo: mETH Protocol (Mantle)

Not approvedPublished by Ketju Research

This memo sets out what the holder owns, who controls it, how holders could lose money, and whether a position can be sold. The advisor decides any client action and amount. Not investment, legal, tax, or compliance advice.

Summary

Ketju does not approve mETH: it shows no yield or liquidity advantage over approved Lido or Rocket Pool, and it adds risks they lack. Four operator groups run its validators, Mantle and COOK authority is still in transition, and a timelock can upgrade its contracts. mETH is deployed on Ethereum L1. Anyone can hold and use it, and protocol contracts route its ETH to Ethereum validators. Ketju's verdict on the Mantle chain does not decide mETH by itself. Four permitted professional operator groups run the disclosed validators, while operator allocation and client diversity are not public enough. A 6-of-13 Mantle Security Council holds important parameter and emergency roles, and a TimelockController can upgrade the proxy system. The protocol charges 10% of staking rewards, the same headline fee as Lido, without Rocket Pool's permissionless operator set. Since December 2025 the project has described a Buffer Pool upgrade meant to make mETH-to-ETH redemptions more efficient. The primary sources do not show its fixed capacity, a contractual completion time, its exact assets or how it behaves under stress, so we give it no weight beyond its stated purpose. The disclosed history shows no core loss and no slashing. Ketju will review mETH again against the measurable tests below.

Review triggers

  • Ketju reviews mETH again only after one current authority map identifies every proxy admin, timelock delay, Security Council threshold, pauser, oracle quorum, COOK execution path and remaining Mantle power
  • Ketju reviews mETH again only if no operator controls more than 33% of active mETH stake and at least eight independent operator groups are active for two consecutive quarters
  • Ketju reviews mETH again only after the exact buffer contracts, assets, balance, allocation rules, privileged roles, fallback path and loss allocation are published and independently reproducible, with no failed withdrawal of the proposed size for 90 days
  • Ketju reviews mETH again only if median net mETH yield exceeds or matches both wstETH and rETH within 25 basis points over the same trailing 180-day window, after all protocol and buffer costs
  • Any native redemption request older than 30 days, any loss of mETH backing, or any undisclosed change to buffer assets or allocation keeps mETH not approved

Facts

Verdict
Not approved
Type
ETH staking
Chains examined
Ethereum
Instruments
METH
Reviewed
Last confirmed

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