EOL: Aztec team shut down their offchain rollup infrastructure on March 31st, 2024. Onchain deposits are disabled and ownership of the rollup contract is irrevocably renounced. Assets in the escrow can be manually withdrawn with the Aztec Connect Ejector.

Sequencer failureState validationData availabilityExit windowProposer failure

Sequencer failure

Self sequence

In the event of a sequencer failure, users can force transactions to be included in the project’s chain by sending them to L1. Proposing new blocks requires creating ZK proofs.

State validation

ZK proofs (SN)

SNARKs are zero knowledge proofs that ensure state correctness, but require trusted setup.

Data availability

Onchain

All of the data needed for proof construction is published on Ethereum L1.

Exit window

∞

Users can exit funds at any time because contracts are not upgradeable.

Proposer failure

Self propose

If the Proposer fails, users can leverage the source available prover to submit proofs to the L1 bridge.

Rollup stage

Zk.Money v2 (Aztec Connect) is a

Stage 2

ZK Rollup.

Learn more about Rollup stages

Please keep in mind that these stages do not reflect rollup security, this is an opinionated assessment of rollup maturity based on subjective criteria, created with a goal of incentivizing projects to push toward better decentralization. Each team may have taken different paths to achieve this goal.

Data availability

All data required for proofs is published onchain

Since EOL this is only true if the user themself runs the rollup locally and publishes the data.

RollupProcessorV3.sol#L686 - Etherscan source code

Learn more about the DA layer here:

Ethereum

State derivation

Node software

The entire stack’s source code is housed in a single monorepo, which can be found here. For instructions on running the node, please refer to this readme. Since EOL the aztec-connect-ejector can be used to run a rollup instance and withdraw.

Compression scheme

No compression is used.

Genesis state

The genesis file is available here, and it includes accounts from zk.money as well.

Data format

The code to decode onchain data can be found here

State validation

Validity proofs

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. These proofs are then verified on Ethereum by a smart contract.

RollupProcessorV3.sol#L706 - Etherscan source code

Operator

No operator

Only specific addresses appointed by the owner were permitted to propose new blocks during regular rollup operation. Now that the system is EOL, the rollup can only be processed locally by volunteers.

Users can force any transaction

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.

Withdrawals

EOL: Manual withdrawal using Aztec Connect Ejector

EOL: Aztec team announced they are going to shut down the rollup infrastructure on March 31st, 2024. Deposits are disabled and ownership of the rollup contract is irrevocably renounced. Assets in the escrow can be manually withdrawn with the Aztec Connect Ejector.

Aztec Connect Ejector - Codespace template for running the Aztec Connect rollup.

Regular withdraw (disabled)

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.

Other considerations

Payments are private

Balances and identities for all tokens on the Aztec rollup are encrypted. Each transaction is encoded as a zkSNARK, protecting user data.

Fast Privacy, Now - Aztec Medium Blog

Smart contracts

A diagram of the smart contract architecture

Ethereum

RollupProcessorV3 0xFF1F…0455 Implementation (Upgradable)Admin

Main Rollup contract (immutable) responsible for withdrawals and accepting transaction batches alongside a ZK proof. This contract stores the following tokens: ETH, DAI, wstETH.

AztecFeeDistributor 0x4cf3…4927

Contract responsible for distributing fees and reimbursing gas to Rollup Providers.

DefiBridgeProxy 0xA1BB…1487

Bridge Connector to various DeFi Bridges.

Verifier28x32 0xb7ba…1CFB

Standard Plonk zkSNARK Verifier.

Search

Stage 04 requirements met

Stage 13 requirements met

Stage 21 requirement met

All data required for proofs is published onchain

No operator

Users can force any transaction

EOL: Manual withdrawal using Aztec Connect Ejector

Regular withdraw (disabled)

Payments are private

Ethereum