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MetaMask, Linea and Brevis unveil verifiable ZK-proof rewards
MetaMask has partnered with Layer 2 network Linea and zero-knowledge infrastructure provider Brevis to introduce a verifiable, on-chain rewards program for MetaMask Card users. The initiative leverages Brevis’s ZK-proof technology to verify lending and borrowing activity on Aave’s Linea market and distribute rewards in a trustless, transparent manner.
What the rewards program offers
Eligible MetaMask Card holders receive a passive 2.4% fixed APR boost when lending or borrowing USDC on the Aave Linea market. The boosted yield applies up to a combined cap of 5,000 USDC in collateral and debt per user. Rewards are calculated every four hours and can be claimed through Incentra, Brevis’s on-chain rewards platform, with no additional sign-ups or liquidity operations required.
Eligibility and claiming process
To qualify, users only need to complete at least one transaction with their MetaMask Card. Brevis computes a time-weighted average of each user’s collateral and debt every four hours, generates a zero-knowledge proof of eligibility and reward amount, and submits that proof to a Linea smart contract for verification. Users can then claim rewards via Incentra, and anyone can independently verify payout accuracy on-chain thanks to the ZK proofs.
How ZK-proofs change on-chain incentives
The program is designed as a blueprint for more transparent web3 incentives. Historically, incentive systems have relied on opaque tracking or centralized verification, creating high barriers for participation. By integrating zero-knowledge proofs, the MetaMask- Brevis- Linea campaign enables permissionless, cryptographically verifiable rewards without exposing sensitive user data. This preserves privacy while maintaining auditability and composability across DeFi protocols.
Technical flow and DeFi composability
Brevis reads lending and borrowing states directly from Aave’s smart contracts on Linea, calculates the reward eligibility off-chain, and produces a succinct ZK-proof. That proof is then submitted on-chain where Linea validates it before distributing the reward. This approach removes manual reconciliation and centralized databases from the process, making it easier for developers and users to build interoperable rewards and incentive systems across Layer 2 and DeFi applications.
Additional perks and community speculation
Beyond the APR boost, MetaMask Card users still benefit from 1%–3% cashback in USDC on purchases and up to 10% back in “Coinmunity” rewards — tokens, NFTs, or other digital assets issued by participating brands on Linea. The program also arrives amid chatter about a potential MetaMask-branded stablecoin (rumored names mUSD or mmUSD) and long-standing rumors of a native MASK token. ConsenSys, MetaMask’s parent company, says no native token currently exists.
For now, the campaign highlights how Layer 2 scalability and zero-knowledge proofs can make on-chain rewards as seamless as traditional finance perks while preserving DeFi’s transparency and composability.
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