Original author: Sui Foundation
Compiled by: Odaily Planet Daily Asher
Sui Bridge, a native bridge protocol designed for bridging assets and data between Sui, is launched on testnet today. As a native protocol, Sui Bridge can easily and securely transfer ETH, wBTC, USDC, and USDT between Ethereum and Sui, making it an important part of Sui infrastructure.
Leveraging Sui’s inherent security and speed, Sui Bridge is powered by Sui network validators and provides a new path into Sui.
As the Sui ecosystem grows, diverse, secure, and reliable bridge solutions become a fundamental component of a healthy DeFi ecosystem. Bridging promotes interoperability between different blockchains, enabling assets and data to flow across networks. This not only enhances liquidity, but also expands the utility of digital assets, making it easier for users to participate in various blockchain activities such as DeFi and gaming.
Sui Bridge Security
As a native bridge protocol, Sui validators guarantee the security of Sui Bridge, ensuring a high degree of trust and reliability. Unlike third-party bridge protocols that rely on external validators, Sui Bridge leverages the inherent security infrastructure of the Sui blockchain.
This native approach means that bridging operations are secured by the same powerful mechanisms that protect the Sui network itself.
Testing Rewards
To celebrate the launch of Sui Bridge, an incentive program was created that focuses on improving the user experience and ensuring the security and reliability of the system.
The team encourages participants to use the bridge frontend extensively to help catch any edge cases and fix bugs in smart contracts, bridge nodes, and user interfaces.
A total of 100,000 SUI will be distributed on the mainnet to addresses that contribute to testing Sui Bridge.
Help Testing
To participate in the event, users must interact with Sui Bridge's web interface on the testnet and ensure that the entire transaction process is successfully completed in both directions, including claiming assets on both sides. This helps the team accurately track eligible events and reward participants.
Using the bridge outside of the web interface, such as calling functions directly, will make the address ineligible for rewards. Other eligibility requirements will be described in the applicable Terms of Service.
Participants in this testing program are encouraged to explore the entire bridge flow. However, some of the most valuable feedback comes from those who encounter and report real issues. Deliberate testing to uncover edge cases is encouraged.
Before reporting an issue, participants should check the Sui Discord server and review the discussion in the sui-bridge dedicated channel. To report new issues, please use the separate Sui Bridge forum. Feedback typically needs to include a video clip to help reproduce the issue, along with the relevant transaction hashes/digests. If the reported issue is genuine, the reward will be distributed accordingly at the end of the program.
Additionally, to streamline the process, the team has created a comprehensive FAQ covering common misconceptions and known issues. Participants should reference these resources before reporting an issue. Moderators will assist in reviewing submitted videos for accuracy and relevance.
Participants are encouraged to submit only high-quality reports after consulting the FAQ and Discord channel. It should be noted that low-quality and spam reports may have a negative impact on rewards.
Bug Bounty Program
In addition to the testnet incentive program, the team will expand the scope of the Sui bug bounty program to include Sui Bridge. We invite the community to help us find and fix potential vulnerabilities.
From severe vulnerabilities, such as permanent loss of user funds, to moderate risks, such as causing the bridge node to crash, every contribution is critical to ensuring the security and reliability of Sui Bridge. Join the testing to make Sui Bridge as secure and powerful as possible.
Additional qualifying requirements will be detailed in the applicable Terms of Service.
Operation Guide
Currently, the Sui Bridge web interface uses the Sui testnet and the Ethereum Sepolia testnet. Most wallets allow users to switch between different networks in the same way as the Sui Bridge web interface, i.e. by selecting the appropriate network via a tab or drop-down menu.
Users must request testnet tokens from a network-specific faucet. There are multiple faucet options on both the Sepolia and Sui testnets. For example, Google Cloud provides a faucet for the Ethereum Sepolia testnet, while Sui Wallet provides a simple one-click process to claim testnet SUI tokens in both mobile and browser extension versions. There are more ways to get testnet SUI tokens in Sui's documentation.
Five types of tokens are supported on the Sui Bridge testnet:
Native Graves of Ethereum
Wrapped ETH
Wrapped BTC
USDC
USDT
The following guide describes how to bridge assets from Ethereum Sepolia to Sui testnet, and then bridge assets from Sui testnet back to Ethereum Sepolia. Each round-trip bridge is considered a complete test case and is eligible for rewards.
STEP 1. Go to Sui Bridge’s testnet web interface.
STEP 2. Connect an Ethereum wallet and a Sui wallet. For the target chain, you can also choose to click "Manual Input" to manually enter the address.
STEP 3. Get/mint test coins from the faucet or token contract:
For native Sepolia Ethereum, use the faucet linked above.
For Wrapped ETH, on Etherscan, go to the Contract -> Write Contract tab and click Connect to Web3, then execute the write operation to initiate a deposit transaction that wraps the native Sepolia Ethereum as WETH.
For WBTC, USDC, or USDT, on Etherscan, go to the Contract -> Write Contract tab, then click Connect to Web3, and then execute the write operation to initiate a mint transaction to obtain the token. (Note that WBTC has 8 decimal places, so an amount of 1000000 is equivalent to 0.01 WBTC. USDC and USDT have 6 decimal places.)
Test a token bridge from Ethereum Sepolia to the Sui testnet. Select a token, enter the amount to bridge, and select Bridge assets. The interface may require you to approve authorization for the ERC 20 token.
After the wallet approves the transaction, the user will be redirected to the transaction details page to track the progress of the bridge transaction. The transfer from Sepolia to Sui testnet may take about 10 minutes to complete. This is because of Ethereum's probabilistic finality.
In most cases, once the final confirmation of Ethereum is completed, the bridged tokens will be sent directly to the receiving address on the Sui testnet without the need for the receiver to manually claim it. In some edge cases, the receiver may need to wait and manually claim it in the user interface (during the incentive event, the team may intentionally increase this situation to test this behavior).
Test the bridge from Sui testnet to Ethereum Sepolia. Click the toggle button in the middle of the form to switch direction. Select the asset that just arrived at the Sui testnet address and bridge it back (the amount doesn’t matter), then submit the initialization transaction. Users can then claim their assets immediately on Ethereum Sepolia via the Claim button on the interface, which is the second transaction. In some edge cases, the recipient may need to wait an additional period of time before claiming the tokens (during incentive events, the team may intentionally add this situation to test this behavior).
Preparing for the test
By participating in the Sui Bridge testnet, users not only help the team create a more secure and efficient bridge system, but also experience a smooth transition when the bridge is officially launched to the Sui mainnet. The team looks forward to seeing the community participate and welcomes any feedback. Test Sui Bridge and stay tuned for the release of Sui Bridge on the mainnet.
Note: This content is for general educational and informational purposes only and should not be construed or relied upon as an endorsement or recommendation to buy, sell or hold any asset, investment or financial product, and does not constitute financial, legal or tax advice.
