Rubic Refunds Gas Fees For Swaps To And On ZkSync Era!

5 min readMay 17, 2023

Rubicans! Recently, we’ve held an amazing zkSync Era Galxe campaign together with Symbiosis and! The overwhelming success of the campaign has motivated us to embark on another exciting adventure on the popular zkSync Era network, this time in collaboration with Galxe and SyncSwap DEX, the most popular DEX on zkSync Era!

zkSync Era Ecosystem

Participating in the Rubic x Galxe campaign is an excellent opportunity to enhance your wallet’s interaction with 6 partnering protocols on zkSync Era, and be eligible for potential airdrops along — with getting gas refunds for your swaps to and on zkSync Era.

zkSync Era is the next big Ethereum Layer 2 project that everyone is buzzing about. Our team has conducted a thorough analysis of the zkSync Era ecosystem and its live projects, putting together a comprehensive guide on how to unlock the full potential of the new network, and covering the universal steps you need to follow to qualify for potential future airdrops. Read our article “Unlocking the Potential of zkSync Era: A Comprehensive Guide to Airdrop Opportunities”.

Promotion Rules

​​Between May 17th (starting 13:00 UTC) and May 31st, 2023, users who make cross-chain swaps to zkSync Era and on-chain swaps on zkSync Era with SyncSwap on Rubic, will get gas refunds and unique Galxe NFTs on zkSync Era!

Get these #NTFs to receive refunds from any chain to/on zkSync Era, with a limit of $20 for Ethereum, and for 3 swaps in total per wallet. They will be in RBC tokens and added to your SwapToEarn program on Rubic. The total limit for refunds is $10,000.

There will be 3 Galxe NFTs to claim completing the following tasks:

NFT 1:

1 — Subscribe to Rubic’s Twitter and Discord accounts

2 — Like + Quote the Announcement Tweet

3 — Swap any token from any chain to zkSync Era via any available provider on Rubic, including Symbiosis, Multichain, or XY Finance.

NFT 2:

1 — Subscribe to Rubic’s and SyncSwap’s Twitter accounts

2 — Like + Quote the Announcement Tweet

3 — Swap any token On-Chain on zkSync Era via Syncswap on Rubic

As a bonus, you can easily obtain a memorable NFT by reading our comprehensive airdrop guide to the zkSync Ecosystem:

1 — Read Rubic’s Airdrop Guide (link)

2 — Subscribe to Rubic’s Telegram Chat (link)

Please note that cheating is heavily discouraged. For example: Creating multiple wallets to get more refunds, etc.. It is at the team’s discretion to decide what is considered cheating on a case-by-case basis.

How to Start on zkSync Era

Firstly, you need to add zkSync Era to your wallet: You can use any EVM-compatible wallet, such as MetaMask. The Argent Wallet is currently friendly to zkSync Era in test mode.

Here’s how to add it:

Second, you’ll need Starter ETH — just like gas on Ethereum, you’ll need ETH to cover transaction fees on zkSync. You can easily transfer ETH from Ethereum, Avalanche, Optimism, BNB, or Arbitrum to zkSync using Rubic’s exchange at:

Voila! You’re ready to make swaps into zkSync Era at!

Swapping with Rubic, you’ll also receive bonus RBC tokens thanks to our Swap to Earn program, depending on the network you choose to swap from.

About zkSync Era

zkSync Era is a Layer 2 protocol that scales Ethereum with cutting-edge ZK tech. Their mission is to not only increase Ethereum’s throughput, but to fully preserve its foundational values — freedom, self-sovereignty, decentralization — at scale.

About SyncSwap

SyncSwap is a seamless decentralized exchange (DEX) on the zkSync Era.

Powered by zero-knowledge technology, SyncSwap brings more people easy-to-use and low-cost DeFi with complete Ethereum security.

About Rubic

Rubic is a Cross-Chain Tech Aggregator for users and dApps.

Our vision is that Rubic’s new umbrella SDK will aggregate the best Web3 cross-chain tech — from signals and oracles, to tokens and NFT bridges, in ready-made templates for DEXs, Lending/Farms, and more. This will help developers easily make their Web3 dApps cross-chain, regardless of what their function is.

Right now, Rubic aggregates 60+ major blockchains, 90+ DEXs and bridges, and enables swapping of 15,500+ assets with the best rates, highest liquidity, and transaction speeds — in one click. Users can do it on, but we also provide tools for dApps to enable cross-chain swaps (

On top of that, Rubic’s app and our cross-chain widget provide fiat on-ramp services, making crypto easy to access and buy.




Rubic's Best Rate Finder tool for crypto swaps aggregates 70+ blockchains, 220+ DEXs and bridges, and 15,500+ crypto assets.