Poly Network is one of the most popular cross-chain bridges with over $335 million TVL and supports 32 prominent blockchains. DeFi is booming, and scammers now come up with cloned websites to defraud unsuspecting users. The fake cloned website looks like the actual bridge allowing scammers to steal crypto when a user deposits it for bridging. You can bridge your asset from chain What is Buying And Selling Software Program A to chain B to explore some dApps in chain B. For instance, when a user wants to bridge WETH from Polygon to ETH on Ethereum, Cross Chain Bridge allocates funds from their liquidity pool to send the user ETH in Ethereum. But a slightly different mechanism happens when you bridge tokens back to the original blockchain—for example, exchanging WETH on Cardano for ETH on Ethereum.

what is a blockchain bridge

Unlike custodial bridges, users do not need to deposit their crypto on the DEX for transferring crypto via these non-custodial bridges. Most importantly, the users have complete ownership of their crypto when using a decentralized bridge. Crypto bridging is a potential solution to the problem of blockchain interoperability. From a technical standpoint, crypto bridging involves locking up assets on the source blockchain using smart contracts and producing their “clones” on the destination chain. Developers can also rely on the basics of how blockchain bridges work to achieve promising value benefits. The functionalities of a blockchain bridge integrated into dApps could help in achieving the utilities and benefits of different blockchain networks.

Extended List of Best Crypto Bridges

Furthermore, the Avalanche Bridge also supports ERC-721 and ERC-20 functionality, thereby supporting the transfer of NFTs and cryptocurrencies. The Avalanche team introduced an update for the bridge in June 2022 and included support for transferring assets between Bitcoin blockchain and Avalanche network. The first entry among the types of a blockchain bridge would refer to a trusted blockchain bridge. It is basically a protocol governed under a centralized approach, operator, or entity. Trusted blockchain bridge has earned the name as users have to trust the reputation or identity of a centralized bridge and deposit their funds on the bridge.

what is a blockchain bridge

Cross-chain bridges grant access to a wider variety of cryptocurrencies, and can accelerate the adoption of a crypto asset. While you have plenty of BTC, the Bitcoin and Ethereum blockchains have completely separate rules and protocols. The Umbria Narni Bridge enables blockchain asset transfer using liquidity pools, where assets are held across multiple chains. When choosing a cross-chain bridge, users should be sure the specific blockchain network — as well as token or NFT — they are looking to bridge is supported.

Intro to blockchain bridges

Unidirectional bridges are one-way bridges that allow you to only send assets off to another blockchain, but not back to the native network. Trusted bridges include some element of centralization to complete a transfer from one blockchain to another on behalf of the user. Usually, a central entity or system is responsible for the security of the bridge. As the demand for different blockchain-based Web 3.0 technologies continues to grow, so too does the need to enable interoperability. Blockchain bridges can be classified into two broad categories – centralized (trusted) bridges and decentralized ( untrusted) bridges.

what is a blockchain bridge

The second variant among bridges for blockchain networks would refer to a trustless blockchain bridge. As compared to a trusted blockchain bridge, the trustless variant leverages algorithms and smart contracts over a blockchain network. Therefore, a trustless blockchain bridge does not need any central intermediaries or custodians.

Step 4: Deposit Assets

Enabling interoperability and exchange across different blockchain networks is an area where cross-chain bridges — sometimes also referred to as blockchain bridges — play an increasingly important role. One important question relating to cross-chain bridges is the use of wrapped assets versus native assets. These limitations can be mitigated by decentralized verification supported by Chainlink Proof of Reserve. Custodial crypto bridges sometimes referred to as trust-based bridge, are centralized bridges that needs to be managed by a central organization of mediators. Users must rely on the central entity to verify and validate transactions when transferring crypto from one chain to another. They might seem to be a cost-effective choice when transferring a large quantity of cryptocurrency.

what is a blockchain bridge

By building a bridge between two blockchain networks, users can transfer assets from one network to another, which opens up new possibilities for cross-chain interoperability. Building the future of an open, decentralized web (Web 3.0) requires a spirit of open collaboration and interoperability, with teams across the blockchain space working together to bring about a new paradigm. Blockchain bridges provide a promising way to move beyond the Balkanization of blockchain networks in an effort to promote greater innovation, user adoption and technological relevance.


Implementing mechanisms like bug bounties to reward the discovery and responsible disclosure of vulnerabilities fosters a collaborative security culture. Furthermore, utilizing advanced monitoring tools and real-time analytics allows for timely detection and mitigation of potential threats. To guarantee a smooth user experience and prevent congestion, bridges must tackle scalability and high availability. By addressing these elements, bridges become resilient arteries, handling increasing demand while ensuring uninterrupted cross-chain activity. This could be an oracle (centralized/or decentralized) or external validator for the bridging process. Avalanche Bridge – The Avalanche Bridge allows for transfers of BTC from Bitcoin to Avalanche’s C-Chain.

what is a blockchain bridge

By understanding the diverse landscape of bridges and their unique characteristics, you can navigate the interoperable future with confidence and unlock the limitless potential of the blockchain ecosystem. Remember, while bridges offer distinct advantages, they may involve slightly higher fees compared to centralized exchanges. Additionally, their value shines brightest when seeking opportunities for the same asset across different networks. By choosing the right bridge and understanding its specific fees and functionalities, you can effectively navigate the interoperable landscape and maximize your blockchain experience. As blockchain technology innovates quickly, more cross-chain trustless bridges are created to help bridge assets from one blockchain to another.

What is the difference between bridge and exchange?

Unlike many other bridges, Across only transfers canonical or genuine assets for the safety of its users, instead of representative synthetic tokens. For this reason, Across is only deployed on chains that have an official bridge that helps carry out its canonical token transfers under the hood. While bridges are a prominent option, crypto exchanges also offer cross-chain functionality. While trustless bridges might not be as cheap as their counterparts, they are more secure if the underlying technology has proven its worth. In the absence of bridges, crypto assets remain tethered to their native networks, unable to participate in other ecosystems being ‘isolated’.

  • Withdrawing from a crypto bridge can vary depending on the specific platform you are using.
  • By bridging your assets to Solana, you can take advantage of the lower transaction costs and faster transaction speeds.
  • They act as facilitators for interoperability, allowing blockchains to communicate and interact more efficiently.
  • Hackers have focused on blockchain bridges as they store a large amount of value in the form of tokens.
  • Ultimately, understanding the diverse forms of blockchain bridges empowers users to navigate the interoperable future with confidence, maximizing the potential of their crypto assets.

In summary, Presto is an incredibly powerful and versatile platform that empowers developers to effortlessly deploy their own zkEVM Rollup/Validium on either Ethereum or Gnosis Chain. Now, let’s explore the fascinating recent advancements in zero-knowledge-proof (ZKP) technologies. These developments have a specific goal of reducing risk factors and solving bridge trilemmas. (This includes signing a message or approving the transaction with your wallet’s user interface). Reversible, where the wrapped asset can be exchanged back for the original asset.

What Are Blockchain Bridges

The realm of blockchain bridges pulsates with diverse protocols, each with its unique strengths and characteristics. Understanding these distinctions empowers you to select the optimal bridge for your specific needs. A blockchain “bridge” connects two blockchains and allows users to send cryptocurrency from one blockchain to another. This process often managed through smart contracts, ensures that the original assets are securely held while their counterparts circulate within another ecosystem.

Those systems include financial institutions, banks and credit cards that handle foreign exchange. In the world of blockchains, a cross-chain bridge serves an analogous purpose. Proof of stake (PoS) is a consensus mechanism that selects validators based on the amount of cryptocurrency they stake to process transactions and produce new blocks.