How Conduit Powers WINR: The Biggest Rollup for Decentralized iGaming

WINR is the number one blockchain dedicated to iGaming. As the home to a growing network of decentralized casino apps – most notably JustBet – WINR is making iGaming unruggable, and users are responding. As of April 2025, WINR has processed over $130 million in betting volume, with $1.12 million in profit shared with users.

Perhaps even more impressive is WINR’s onchain scaling. The chain is routinely among the top gas users of any rollup, and in one recent spike accounted for just under half of all throughput in the Ethereum ecosystem at 80 Mgas/s.

Even better: WINR’s onchain costs are just 0.015 ETH  per month – under $30 in USD.

All of this is possible thanks to WINR’s rollup infrastructure, developed and maintained by Conduit. Keep reading to learn more about how we worked with WINR to build the perfect rollup for onchain gambling and scale it to tens of thousands of users.

The WINR rollup tech stack

Framework: Arbitrum Orbit

Settlement layer: Arbitrum One

Data availability: Arbitrum AnyTrust

The problem: WINR’s gas costs were out of control 

WINR’s mission is to make online gambling completely fair and trustless for bettors by putting it onchain. “Online gambling has historically been a dishonest industry,” said WINR Head of Engineering @onchainjack. “We wanted to change that.” 

WINR began this mission by deploying as a protocol on Arbitrum One. But the costs of shared blockspace quickly made this setup unworkable. WINR processes and pays out every single bet onchain, which requires immense amounts of compute and data throughput – there’s no cost-efficient way to do that at scale without a dedicated chain. “Our paymaster alone cost us over $500,000 in just three months,” said OnchainJack. 

The WINR team realized they needed to launch their own rollup in order to scale. That’s when they went to Conduit. “Everybody on the team from our investors to core contributors knew that Conduit would be the best team to work with,” said OnchainJack.

Prioritizing speed and cost-efficiency: How Conduit and WINR built the best Arbitrum L3 for onchain gambling

Conduit and WINR immediately began working together to build the best rollup for fully onchain iGaming. Together, the two teams decided that the Arbitrum Orbit framework would best serve WINR’s needs due to its ultra fast 250 millisecond block times. “We need instant bet settlement to provide the UX our player’s demand,” said OnchainJack. “The Arbitrum stack was the fastest option.” 

Conduit guided WINR toward an L3 deployment with the chain settling on Arbitrum One, and Arbitrum AnyTrust for DA, in order to maximize speed and minimize costs. Arbitrum’s strong support for custom gas tokens and other chain modifications solidified the decision. “We needed complete control over the chain,” said OnchainJack.

As Conduit and WINR iterated on the rollup during the testnet phase, we made tweaks to further improve speed. Specifically, we optimized WINR’s in-house VRF oracle to provide faster response times, and lowered the rollup’s block times even more to 150 milliseconds – another example of how we took full advantage of Arbitrum Orbit’s customizability.

Launch and beyond: WINR is a top decentralized casino and one of Ethereum’s highest-performing rollups

Within weeks of its August launch, WINR Chain usage was off the charts, hitting over 115 transactions per second (TPS) without any latency or downtime.

But perhaps even more impressive is the amount of computing power WINR processes to support fully onchain casinos. WINR’s gas usage is consistently among the highest of all rollups, and during an activity spike in early April reached an all-time high of 209 Mgas/s, with no degradation in performance.

WINR achieves all this with negligible onchain costs.

Overall, WINR Chain’s all-time DA costs add up to 0.175 ETH, which are virtually negligible against its revenue and a huge reduction from what the protocol paid in gas when it ran on a shared blockchain. 

The high performance and low onchain costs enabled WINR’s rollup infrastructure are what make its decentralized casino use case possible. 

“Conduit has been an excellent partner in building the best chain possible for WINR,” said OnchainJack. “They’re great to collaborate with.”  

WINR’s bright future

WINR plans to keep onboarding developers to build more decentralized gambling apps on its chain, but that’s not all. The team is expanding to new use cases as well, including a recently launched leverage trading app and an upcoming prediction market. Conduit looks forward to supporting the WINR team in these endeavors and making sure its rollup infrastructure maintains the performance and scalability necessary for them to succeed.

Do you want to build your own high-performance rollup like WINR? Contact us here.