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As part of the Ethereum Economic Zone project, three new demonstrations were announced, involving CoW Swap, Safe and post-quantum signatures, showing how applications built on Ethereum rollups can interact directly with the mainnet within a single transaction.
In a statement dated November 4, the Ethereum Economic Zone (EEZ) team said these developments represent the first three achievements in the field of synchronous interoperability between the Ethereum base layer and its rollups, with live demonstrations scheduled for the Devcon conference in Mumbai.
The demonstrations cover decentralized exchange trading using mainnet liquidity, coordinated changes to multisig wallet ownership across networks, and post-quantum signature verification on a rollup before authorizing a transfer on the mainnet.
Developers Friederike Ernst and Eduardo Antuña Diez were set to present the technology at 13:00 Indian Standard Time on the Lotus Stage 1 stage, where attendees could see the transactions in action.
EEZ enables consolidated trades using mainnet liquidity
The first demonstration involved CoW Swap, in which a user of a network designated as Rollup X signed an order that was filled using liquidity available on the Ethereum mainnet.
According to the EEZ team, CoW Swap solvers executed the trade using mainnet liquidity, and the resulting tokens were returned to the rollup within the same transaction.
This process did not require a separate bridge transaction, a waiting period, or an additional user signature.
Typically, users moving assets between Ethereum and its layer 2 networks need to interact with bridge infrastructure before gaining access to liquidity in another network. Depending on the bridge and network, completing a transfer may involve separate transactions and confirmation periods.
The EEZ approach allows connected networks to coordinate the execution of operations in such a way that different parts of a transaction either complete successfully simultaneously or fail simultaneously.
The developers said this could help newly launched rollups access Ethereum’s existing liquidity without depending entirely on their own trading pools, where limited liquidity could result in users paying more in slippage.
This demonstration is a continuation of an earlier achievement in October, when the project completed its first atomic transaction on the mainnet, involving 0.001 ETH.
Safe demonstrates coordinated changes to wallet ownership
The second demonstration focused on Safe, a multisig wallet infrastructure widely used by decentralized autonomous organizations and managers of crypto treasuries.
EEZ said the developers demonstrated the first atomic ownership changes between Ethereum layer 1 and layer 2, as well as access to treasury assets held across multiple Safe accounts.
In the example given, a user would be able to update wallet owner information and gain access to treasury funds in different networks through coordinated execution of operations.
The team explained that changes to ownership made to a Safe account on the Ethereum mainnet can be read and verified from a connected rollup within the same transaction.
This kind of coordination addresses a problem that can arise when organizations use separate Safe accounts across multiple blockchains.
Changes to the access rights of authorized signers or a wallet generally need to be made separately in each network, which can lead to a temporary desynchronization of account configurations.
The demonstration showed how the Ethereum Economic Zone framework can coordinate these updates without requiring users to carry out separate ownership management processes within the participating networks.
Post-quantum signature verification uses 91% less gas
The third demonstration focused on post-quantum cryptography: the developers verified a Falcon signature on Rollup X and used the result to authorize a transaction on the Ethereum mainnet.
According to EEZ, a mainnet smart contract called a rollup verified the signature verification result and authorized the transfer within the same transaction.
Falcon is a digital signature algorithm designed to counter attacks from quantum computers, which could eventually compromise some cryptographic methods used in blockchain systems.
The team said that performing the verification directly on the Ethereum mainnet would require approximately 5.5 million gas.
By performing the computational work on a rollup and giving the mainnet the ability to use the verified result, the demonstration achieved a reported 91% reduction in gas consumption.
The example in question concerned verifying a post-quantum signature and using it in transaction authorization, rather than replacing Ethereum’s existing signature system.
The developers presented the result as another example of the use of synchronous composability, particularly for resource-intensive operations that can be processed off the base layer while retaining access to mainnet contracts.
EEZ development moves toward integration with Gnosis Chain
The demonstrations were the result of several months of development that began after Gnosis, Zisk and the Ethereum Foundation presented the Ethereum Economic Zone at the EthCC conference in April.
The framework was designed to address the problem of liquidity and application fragmentation across the growing number of Ethereum layer 2 networks, while allowing participating chains to settle transactions on the Ethereum network.
Subsequently, its development became part of Gnosis Chain’s planned transition to an Ethereum consolidation model.
In August, GnosisDAO approved the transition through governance proposal GIP 153, which received the support of 123,158 GNO-holding organizations and exceeded the required participation threshold.
Under the approved plan, Gnosis Chain will eventually retire its existing validator set and use Ethereum for settlement and economic security.
The transition is expected to preserve existing applications, account balances, contract addresses and the chain identifier, with the initial deployment planned for late 2026 or early 2027, depending on technical readiness.
Meanwhile, Consensys presented its institutional interoperability platform at the Devcon conference, with EEZ standard support planned among its future integrations.
The EEZ developers provided step-by-step technical instructions on the build.eez.io and eez.dev websites, and also invited developers to test the experimental network at the project’s booth at Devcon or remotely.
