Coinbase

Coinbase Wrapped Staked ETH (cbETH) is a non-rebasing liquid staking token representing ETH staked through Coinbase, redeemable for the underlying plus rewards.

Backed by a regulated US exchange; cbETH provides liquid access to Coinbase-operated staking.

- cbETH ERC-20 token: An ERC-20 utility token (contract 0xBe9895146f7AF43049ca1c1AE358B0541Ea49704 on Ethereum) that represents ETH staked through Coinbase plus its accrued staking rewards. It is freely transferable, tradeable on DEXs, and usable in DeFi while the underlying ETH stays staked with the protocol. - Non-rebasing conversion-rate mechanism: cbETH is non-rebasing: holder balances stay fixed while a cbETH-to-ETH conversion rate rises over time as staking rewards accrue (rewards minus penalties). Conversion Rate = Total Wrapped Staked ETH / Total cbETH Supply; the rate and balance were initialized on June 16, 2022 19:34 UTC. - ExchangeRateUpdater / oracle: An on-chain ExchangeRateUpdater contract (0x9b37180d847B27ADC13C2277299045C1237Ae281) updates the cbETH exchange rate periodically. Third-party price feeds (e.g. a Chainlink cbETH/ETH feed) publish the rate to DeFi with a heartbeat / deviation-triggered update. - Wrap / unwrap flow: Coinbase customers wrap staked ETH into cbETH and unwrap cbETH back to ETH inside the Coinbase platform with no fee on the conversion itself. Unwrapping is subject to a processing/unstaking delay (minimum roughly a day, longer in periods of high demand).

- Counterparty: cbETH is a fully centralized, custodial product: Coinbase custodies the staked ETH, operates the validators, and controls minting/burning and the exchange-rate contracts. Holders depend entirely on Coinbase's solvency, honesty, and operational continuity, and Coinbase's user agreement states it will not backstop or guarantee cbETH liquidity. - Regulatory: Coinbase's staking-as-a-service program has been the subject of US securities scrutiny; the SEC's June 2023 enforcement action alleged the staking program was an unregistered securities offering. Although the SEC dismissed that action in February 2025, the legal status of exchange-run staking remains policy-dependent and could shift with future administrations or in other jurisdictions. - Oracle: DeFi protocols that price cbETH rely on its exchange rate being published on-chain (via the ExchangeRateUpdater and third-party price feeds with heartbeat/deviation-based updates). A stale, delayed, or manipulated rate feed could cause mispricing, faulty liquidations, or bad debt in protocols that accept cbETH as collateral. - Reserve / Depeg: cbETH secondary-market liquidity is highly concentrated (the large majority of trading historically sat on the Coinbase venue). During stress, mass redemptions or an unwrap/unstaking queue backlog can push the secondary-market price of cbETH below its fair conversion-rate value, producing a temporary depeg from its ETH-plus-rewards redemption value. - Smart Contract: cbETH depends on its wrapping, minting, and rate-limiting contracts. OpenZeppelin's August 2022 audit found no critical or high issues but flagged a medium-severity scenario in the RateLimit contract where callers could deplete their mint/rate-update allowance, potentially leaving the exchange rate outdated if not enough callers maintain sufficient allowance.

- Accumulating (capitalizing) money-market or interest-bearing fund share: similar — Like an accumulating fund share, cbETH does not pay out a running yield stream; instead the value of a single unit grows as the underlying rewards are reinvested, so appreciation shows up in the unit's redemption value (the cbETH/ETH conversion rate) rather than in a growing unit count.; differs — cbETH is a permissionless on-chain ERC-20 that trades on DEXs and is usable as DeFi collateral 24/7, with no fund prospectus, no regulated custodian in the securities sense, and price/liquidity risk that is highly concentrated on the Coinbase venue rather than backed by a fund's NAV guarantee.