11th July Update

Here is another update on Quant Fusion's public release progress, as of the 11th July 2025.

Where to provide feedback?

There are multiple places for you to provide feedback. For private feedback, including if you are looking to build on Fusion, contact us via https://quant.network/contact/

For public feedback on x.com, use the hashtag #QuantFusion and tag @OverledgerDev, then your feedback will be read when possible.

11th July Update

The following is not a complete list of Fusion activity completed so far. It instead should be viewed as a summary of the highlights.

This week, progress proceeded as planned in multiple areas.

There was one area where a key decision was required - regarding our selection of a cross-chain swap app to deploy on the Multi-Ledger Rollup. Why do we want to deploy this app? This is because it will provide an instant token on/off ramp for the rollup. The alternative off ramp for the rollup is via it's non-custodial withdrawal process, but this will require a few days for the liquidity to be released. Note that the non-custodial token on ramp to the rollup operates near-immediately (just after your deposit transaction has been finalized on the connected blockchain).

Decision Point: What cross chain swap app to support?

Evaluation: we open-mindedly reviewed cross chain swap apps currently deployed on public blockchains. But we were not satisfied with any, because: (a) we want our deployed cross chain swap app to easily integrate with public permissionless and permissioned blockchains; (b) we don't want this app to require the deployment of smart contracts on the connected blockchains; (c) we want this app to enforce organisational specific authorisation policies (e.g. KYC), depending on the liquidity route chosen, e.g. if Bank A has a permissioned blockchain connected to the Multi-Ledger Rollup, then to immediately swap a multi-ledger token for Bank A's token on its permissioned blockchain, Bank A may require KYC of the requesting account.

Decision: The cross chain swap app we will deploy will utilise the Secure Asset Exchange Protocol (SAEP), as it is the only option to satisfy all of (a), (b) and (c) mentioned above.

Additionally, our Multi-Ledger Rollup user interface testing began this week. Below are some early screenshots.

please note: (a) the layout is still subject to change prior to public release; and (b) key information (e.g. accountIds and transactionIds have been redacted).

Our first collection of screenshots show our transaction explorer page. As you can see this page provides access to a list of accounts that are using the Multi-Ledger Rollup sequencer (and their QNT balance on the Multi-Ledger Rollup):

It also provides a list of transactions performed by these accounts on the Multi-Ledger Rollup:

You can also access information on your deposit transactions to the Multi-Ledger Rollup and your withdrawal transactions from the Multi-Ledger Rollup:

Our second collection of screenshots show our smart contract explorer page. This page details: (a) the smart contracts you have deployed; and (b) the smart contracts deployed by others that you have access to.

For each of these smart contracts you can access their function, interface and bytecode information:

And for your own smart contracts, you can update its access control information:

Other highlights this week include:

• The Multi-Ledger Rollup Sequencer will be using Overwallet for additional security around its on chain transactions.
• The Multi-Ledger Rollup Sequencer to metamask testing passed successfully.
• We are building a connector example implementation that will be released as open source, to serve as a guide for others building their own connectors to integrate with Fusion.

Next Steps

We continue Fusion development and testing in multiple areas:

• Continue stimulated, onchain and L2.5 transaction testing for our Multi-Ledger Rollup devnet, focusing on multi-ledger token transactions.
• Continue user interface to sequencer integration testing.
• Finalise testing of sequencer permissioning and access control sections.
• Continue with preparing Fusion's Network of Networks features for public release
• ...and so much more!