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This article mainly explains "what are the popular cross-chain technologies in the blockchain". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "what are the popular cross-chain technologies in the blockchain"?

At present, there are several popular cross-chain technologies:

Notary mechanism (Notary schemes)

Side chain / trunk (Sidechains/relays)

Hash Lock (Hash-locking)

Distributed private key control (Distributed private key control)

Notary mechanism

The so-called notary mechanism is a scheme that ensures the effective transfer of assets through an agreement. As long as the block chains of both sides are connected to a notarization agreement, the transfer of assets can be completed. At present, the more mature project is interledger.

We mentioned earlier that Hyperledger has a tool project, quilt, that enables cross-chain transactions. In fact, this project implements this function by implementing the interledger protocol. At present, most popular blockchain projects support the interledger protocol, such as Ethernet Fong.

The schematic diagram of the interledger work is as follows:

The Interledger protocol does not rely on any third-party blockchain project and provides an interface for "connector" or "verifier". Any different accounting system can dock this connector or verifier to transmit currency freely, and the transaction can be completed as long as a consensus is reached.

Side chain

Side chain is a new type of block chain based on anchoring tokens on a certain original chain. the transaction process is similar to the rule of using money to buy real estate and tokens.

BTC Relay is a project supported by the Etay Fong Foundation, which is considered to be the first side chain on the blockchain. BTC Relay connects the ethernet network to the bitcoin network by using ethernet's smart contract, which allows users to verify bitcoin transactions on ethernet. It creates a small version of the Bitcoin blockchain through the Ethernet Square smart contract, but the smart contract requires access to bitcoin network data, which is difficult to achieve decentralization. BTC Relay makes a meaningful attempt to communicate across block chains, opening the communication channels for different block chains.

The disadvantage of the side chain is also very obvious, that is, it is not universal, the scope of application is narrow, and it is difficult to achieve a variety of financial functions.

Relay

The technology of relay is somewhat similar to how VPN works. Its working mechanism is to package the consensus mechanism of the private chain on the common chain, so that the private chain / alliance chain can complete the transaction through the mutual chain.

At present, the more common relay project is polkadot.

Polkadot is a public chain launched by the main core developers of the former ethernet. It aims to solve the two major problems that prevent the spread and acceptance of blockchain technology: real-time scalability and extensibility.

Polkadot plans to integrate the private chain / federation chain into the consensus network of the public chain while maintaining the original data privacy and licensing features of the private chain / federation chain. It can connect multiple block chains to each other.

Hash lock

This is the technology used by Lightning Network (Lightning Network). Its implementation principle is similar to the award question and answer, and the bonus is locked. when the other party answers the correct answer (giving the key), the bonus belongs to the other party and completes the asset transfer. if it times out, the bonus is unfrozen and returned to the initiator.

Lightning network does not try to solve the problem of single payment, its assumption is that the amount of single payment is small enough, even if one party defaults and the other party's loss is very small, the risk is acceptable. Therefore, we must pay attention to the premise of "micro-payment" when using it.

Distributed private key control technology

This technology is more like today's financial markets, where any currency can come in and complete the transaction. Control of the lock is done through the private key.

At present, the more popular applications are wanchain and fusion.

At this point, I believe you have a deeper understanding of "what are the popular cross-chain technologies in the blockchain chain?" you might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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