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Introducing Noir
2022 Oct 6th
Noir - programming language for zero-knowledge proofs, has been introduced.
Learn moreMainnet Launch
2022 Jul 7th
Aztec Connect is live on mainnet, enabling private DeFi on Ethereum.
Learn moreAztec Connect is an open source layer 2 network that aims to bring scalability and privacy to Ethereum. It strives to enable affordable, private crypto payments via zero-knowledge proofs. Additionally it allows to deposit funds into a variety of DeFi Protocols such as LiDo, Element.Fi, etc.
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ZK-SNARKS are zero knowledge proofs that ensure state correctness, but require trusted setup.
All of the data needed for proof construction is published on chain.
The code that secures the system can be changed arbitrarily and without notice.
In the event of a sequencer failure, users can force transactions to be included in the L2 chain by sending them to L1. Proposing new blocks requires creating ZK proofs.
If the Proposer fails, users can leverage the open source prover to submit proofs to the L1 bridge.
Each update to the system state must be accompanied by a ZK Proof that ensures that the new state was derived by correctly applying a series of valid user transactions to the previous state. Once the proof is processed on the Ethereum blockchain the L2 block is instantly finalized.
Despite their production use ZK-SNARKs are still new and experimental cryptography. Cryptography has made a lot of advancements in the recent years but all cryptographic solutions rely on time to prove their security. In addition ZK-SNARKs require a trusted setup to operate.
Funds can be stolen if the cryptography is broken or implemented incorrectly.
All the data that is used to construct the system state is published on chain in the form of cheap calldata. This ensures that it will always be available when needed.
Only specific addresses appointed by the owner are permitted to propose new blocks during regular rollup operation. Periodically a special window is open during which anyone can propose new blocks.
MEV can be extracted if the operator exploits their centralized position and frontruns user transactions.
Because the block production is open to anyone if users experience censorship from the operator they can propose their own blocks which would include their transactions. Periodically the rollup opens a special window during which anyone can propose new blocks.
Users can be censored if the operator refuses to include their transactions and users lack resources to propose blocks themselves.
The user initiates the withdrawal by submitting a transaction on L2. When the block containing that transaction is proven on L1 the assets are automatically withdrawn to the user.
Balances and identities for all tokens on the Aztec rollup are encrypted. Each transaction is encoded as a zkSNARK, protecting user data.
Owner of ProxyAdmin contract, which is used to upgrade RollupProcessorV2. OWNER_ROLE on RollupProcessorV2: can enable capped deposit/withdrawals, can add rollupProviders (sequencers), can change delay before escape hatch, can change the verifier contract with no delay, can change defiBridgeProxy This is a Gnosis Safe with 1 / 2 threshold.
Those are the participants of the Aztec Multisig.
EMERGENCY_ROLE on RollupProcessorV2: Can pause the rollup. This is a Gnosis Safe with 2 / 15 threshold.
Those are the participants of the Emergency Multisig.
RESUME_ROLE on RollupProcessorV2: Can resume the rollup. This is a Gnosis Safe with 10 / 15 threshold.
Those are the participants of the Resume Multisig.
LISTER_ROLE on RollupProcessorV2: Can add new tokens and bridges to the rollup. Can't remove tokens or bridges. This is a Gnosis Safe with 2 / 3 threshold.
Those are the participants of the Lister Multisig.
Actors allowed to call the processRollup function on the RollupProcessorvV2 contract.
Main Rollup contract responsible for deposits, withdrawals and accepting transaction batches alongside zkProof. The contract is pausable by Emergency Multisig. This contract stores the following tokens: ETH, DAI, wstETH.
Can be upgraded by: Aztec Multisig
Upgrade delay: No delay
Contract responsible for distributing fees and reimbursing gas to Rollup Providers.
Bridge Connector to various DeFi Bridges.
Standard Plonk zkSNARK Verifier. It can be upgraded by the owner with no delay.
Can be upgraded by: Aztec Multisig
Upgrade delay: No delay
The current deployment carries some associated risks:
Funds can be stolen if a contract receives a malicious code upgrade. There is no delay on code upgrades (CRITICAL).