Architecture
The framework is based on ERC-7683 intents, leveraging Aztec’s privacy features and a Forwarder contract on Ethereum to ensure verifiable cross-chain settlement. It follows a filler-based model, where fillers fulfill intents and execute transactions across chains.
EVM to Aztec: A user expresses an intent on the EVM L2 by locking assets into an ERC-7683-compatible contract. A filler monitors for such intents and mirrors the value inside the Aztec Gateway by locking their own funds. The user then privately claims these funds within Aztec using a secret. This private claim triggers a message through Aztec’s native bridge. The message is consumed by the Forwarder contract on Ethereum, which writes a verifiable commitment to storage confirming the successful claim. This commitment enables the filler to retrieve their initially locked funds on the EVM L2 by submitting a storage proof via the settle function.
Aztec to EVM: A user initiates a private transfer inside Aztec, expressing the intent to send assets to an EVM L2. A filler observes this intent and pre-funds the user on the destination EVM L2 chain by advancing their own capital. At this point, for the filler to reclaim their funds (i.e., trigger settlement), they must wait until the new EVM L2 anchor root is published on Ethereum mainnet. This root will be used to verify that the filling occurred correctly. Once verified, the Forwarder contract verifies the fill via a storage proof and sends a message to Aztec via the native bridge, initiating the settlement process and enabling the filler to retrieve their funds.
Public intents follow a similar flow, with two key differences:
Transfers are public, meaning the intent and fulfillment are visible on-chain.
On Aztec, the user does not need to manually claim the funds — they are transferred automatically during the filling process.
Settlement remains unchanged
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