Recently, Avalanche Bridge, the native cross-chain bridge of the avalanche protocol Avalanche, announced that about 880 GB tokens will be airdropped to each user's wallet address that has participated in the interaction. After GB enters the secondary market, the highest price will reach 3.68 US dollars. The value also soared to 3238 US dollars. Currently, GB has fallen back to around $1.8. The wealth effect brought about by airdrops has begun to make the market pay attention to the original cross-chain bridge section of the public chain, and the cross-chain agreement itself is also an important tool on the chain. At present, in addition to the veteran blockchain network Ethereum, new-generation public chains such as BSC, Solana, Fantom, and Avalanche have begun to enter the market. The second-tier expansion chains of Ethereum, Aribitrum and Optimism, are not too much, and the coexistence of multiple chains is the current market. Therefore, the interconnection of assets between chains also makes cross-chain agreements a rigid demand for users on the chain. There are currently two main approaches for asset cross-chain: Although cross-chain protocols provide users with the convenience of on-chain interaction, security is still worrying. Due to the increase in demand for transactions on the chain, the scale of cross-chain funds hosted by cross-chain bridges has also become larger and larger, and it has also become the favorite target of hackers, leading to the high incidence of security incidents in cross-chain bridges. Within two months of July and August this year, there were three security incidents in which cross-chain applications were hacked. On July 11, the cross-chain application ChainSwap was hacked due to a smart contract vulnerability, resulting in a loss of approximately US$8 million; On July 12, the decentralized cross-chain transaction application Anyswap v3 cross-chain fund pool was attacked and lost nearly 8 million U.S. dollars; in August, the cross-chain protocol O3 Swap was stolen due to its infrastructure PolyNetwork network security issues and lost assets As much as 610 million US dollars, the scale of theft hit a new high for DeFi applications. Compared with third-party cross-chain applications, public chain native cross-chain bridges are endorsed by their respective public chain security teams and official authorities, and their security is relatively more trusted by users. It is also the preferred cross-chain method for users when assets are cross-chain. At present, each public chain has launched its own cross-chain bridge. And since AvalancheBridge released the airdrop, users began to look forward to the next public chain cross-chain bridge that issued the airdrop. This issue of DeFi Honeycomb will take stock of the native cross-chain bridges of major public chains. BinanceBridge Binance Bridge is the official cross-chain tool of Binance Smart Chain BSC. It currently supports asset interoperability between Binance Smart Chain and the Ethereum network.

BinanceBridge The cross-chain assets supported by Binance Bridge include more than 60 mainstream assets such as USDT, DAI, ETH, etc. Users can move assets between BSC and the Ethereum network through the cross-chain bridge. The operating principle of the cross-chain bridge is to lock a certain amount of native assets first, and then encapsulate the native assets into cross-chain assets at a ratio of 1:1. Take the cross-chain of assets from Ethereum to BSC as an example. When a user wants to withdraw the assets (BETH) from the cross-chain to BSC to Ethereum, the encapsulated assets (BETH) will be destroyed according to the transferred amount, according to 1:1 Generate native assets (ETH). On the BSC chain, assets from the Ethereum cross-chain usually appear in the BSC ecosystem in the form of encapsulated assets, often marked with B. For example, BETH and BDAI are 1:1 mapped encapsulated assets. According to Binance Bridge's official website, the current cross-chain status of mainstream assets is 73601BTC, 1.04 million ETH, 1.779 billion USDC, 192 million DAI, and so on. AvalancheBridge Avalanche Bridge (AB Bridge) is an official cross-chain tool launched by the Avalanche Protocol in early 2021. It is mainly used to solve the problem of users transferring assets under the ERC-20 standard on the Ethereum chain to the Avalanche network.

AvalancheBridge Through the Avalanche Bridge, users can realize the intercommunication of ERC-20 standard assets with Avalanche's C chain. Currently, only ERC-20 assets are transferred between Ethereum and Avalanche, and the native asset transfer on the Avalanche chain is not supported on Ethereum. It should also be noted that the AB bridge does not support native ETH or BTC, but WETH and WBTC packaged assets can be transmitted through the bridge. In the Avalanche ecosystem, Ethereum ERC-20 assets that cross the chain from the AB bridge are marked with the suffix ".e". For example, DAI.e is the form of DAI cross-chain to the Avalanche network. According to the official website of Avalanche Bridge, there are currently 158 million DAI, 5615 WBTC, 165,000 ETH, 218 million USDC, 200 million USDT, etc. that have cross-chain assets into the ecosystem. Terra Bridge Terra Bridge is an asset cross-chain tool officially provided by the Terra (LUNA) chain. Its main function is to bring native assets in Terra ecology to other blockchain networks.

TerraBridge Terra Bridge currently supports the interoperability of Terra native assets in the Binance Smart Chain BSC, Ethereum, and Harmony (ONE) networks. Currently, it mainly supports LUNA, ANC, stable currency UST, and synthetic stock assets (mBABA, mCOIN, mGOOGL, etc.) in the Terra ecosystem. ) And the transfer of native assets such as synthetic assets (mBTC, mETH). It is worth mentioning that the minimum cross-chain asset value supported by the BSC cross-chain bridge is around 360 USDC. The AB bridge cross-chain value limit of the avalanche agreement is higher than $75. Both chains have a minimum cross-chain amount limit, while the Terra Bridge bridge There is no restriction on the quantity and value of assets, and 1 LUNA can also be transferred to other chains supported by the bridge. Terra Bridge currently has not issued any tokens. Wormhole Wormhole is an asset cross-chain tool jointly developed by Solana and Certus.One, which is mainly used to realize the two-way conversion between Ethereum and Solana assets.

Wormhole Since Solana's native token is an SPL standard, before the emergence of Wormhole, when user assets want to convert with other blockchain network assets, the usual operation is to first sell the SPL assets on the Solana chain to the centralized exchange FTX. , And then buy other assets on the chain; when entering the Solana ecosystem, users also need to buy SPL assets through FTX, and then recharge to the Solana chain. This complicated operation limits users' experience on the Solana chain until the Wormhole bridge appears, which allows users to directly convert Ethereum ERC-20 assets into assets under Solana's SPL standard. When users withdraw SPL assets from the Solana chain to Ethereum, they can be directly converted into ERC-20 standard assets without the need to go through the deposit and withdrawal steps of a centralized exchange, which simplifies the user's operation process. Currently, Wormhole has not yet issued any tokens. RainbowBridge Rainbow Bridge is a cross-chain bridge officially launched by the Near blockchain. It is mainly a tool for the chain to connect assets on the Ethereum chain. Currently, it only supports the conversion of Ethereum ERC-20 assets. picture RainbowBridge The Rainbow Bridge experience is more convenient because it has been optimized on the account system. Normally, when the user's assets cross-chain, the wallet needs to be switched to the target network first, and generally only supports connecting to the same wallet address. However, in Rainbow Bridge, users only need to log in with their Near account, and they can fill in the wallet address and amount on the chain that they want to transfer in or out. Rainbow Bridge will automatically perform this operation. The process is like using encryption on the same chain. Money wallet transfers are just as convenient. Currently, Rainbow Bridge has not issued any tokens. AribitrumBridge Aribitrum Bridge is a cross-chain bridge officially launched by Aribitrum, the Ethereum Layer 2 expansion protocol. It is mainly used to solve the transfer of assets between Ethereum Layer 1 and Aribitrum.