-- -- John Donne (John Donne)
The
At present various block chain projects mostly in running alone on his island, that is mean interoperability between block chain greatly limits the application space of block chain, cross chain technology is the key to realize the value of the Internet, it is able to put each island link,
Cross chain technology refers to the assets to a specific block chain into another block assets on the chain, so as to realize the technology of chain and value chain between the circulation,
The status quo
It is well known that block chain in the world at present, various public chain, chain, the chain of private can produce all kinds of digital assets, intelligent of the chain block contract also can produce a large amount of data,
From public chain perspective, the complex process of data exchange between the chain and chain need to cross chain technology to equaling to all parties and the transaction, can block chain as a chain to ensure that the data do not tamper with the database, the establishing trust data real-time,
Most male chain on the private key control mode to realize the transfer of assets and transactions, as a result, cross chain set permissions management becomes very complex, in addition, in cooperation with block chain centralized organization, the enterprise's key and a private key in a centralized system is often managed by an authorization management system, enterprise servers, often by firewall protection, open in the firewall to survive in the system of a p2p network, it can lead to security vulnerabilities,
From business level, more and more DApp to cross chain technology, ecological drive business interests in the value network, the more effective node link, the more widely distributed, may produce the value of the stack, the greater the cross chain technology as the linker, will prop up the network of valuation,
Across the chain technology
For two mutually independent and relatively closed system, want to achieve across the chain, we must pay attention to several questions: how to verify the original transaction status on the chain? How to conduct information transfer and ensure the accurate and timely information? How to complete the transaction confirmation for another chain? How to prevent double payment?
From a technical point can be divided into the following several ways, the way no subordinate relationship, practice often used by project of adjust measures to local conditions,
The first is a Notary mechanism (Notary Schemes), through a centralized node or more centralized node as a Notary, certification a cross chain operation or transaction is valid,
The second is that the mechanism of side chain/trunking (Sidechains/Relays), side chain mechanism is the main implementation of two-way anchor, the method of the anchor, can use multiple signature, or hash lock, etc., relaying mode mainly from a chain to another in a chain of one-way cross chain, simply by relay node to a chain of information update to another chain,
The third is the Hash Locking (Hash - Locking), Hash lock is a relatively easy to implement across the chain technology, originated in the lightning network HTLC (Hashed TimeLock Contract), it can ensure the main interactions across the chain of atomicity,
Fourth is Distributed Private Key Control (Distributed Private Key Control), Private assets by Distributed Private Key generation and Control technology are mapped to assets based on the agreement of the built-in template block chain, according to the transaction information deployment of new intelligent contracts across the chain, which can create a new encryption monetary assets,
Fifth kind is hybrid technology Notary mechanism + side chains (Notary schemes + Sidechains Mixing technology), Mr Universe is the world's first platform based on third generation block chain EOS. IO building across chain service platform, the Notary mechanism + side chain mix technology, side chain technology first, efficient communication, the Notary mechanism to realize rapid value exchange, is an innovative solution,
Cause
Early across chain technology represented by Rayleigh wave and the BTC Relay, they pay more attention to transfer the assets, the existing across the chain technology represented by Polkadot and Cosmos, pay more attention to the infrastructure across the chain,
Since the advent of new technologies, such as schools and chain locations, across the chain technology innovation is not limited to a single way, has been gradually shows a tendency of schools of thought contend to hybrid propulsion, cross chain technology is still in the preliminary exploration stage at present, has not yet formed stable system, there exist many problems, needs to be improved,
Cross chain technology as early as 2012, released in ripple Interledger Protocol, put forward for the first time across the books interoperable solutions, through notary mechanism implementation across books transfer,
First proposed in 2013, the currency community Blockstream company across chain side chain, through two-way link (Two - way peg) mechanism to realize circulation between main chain and side chain; In October 2014, side chain agreement in the white paper "Enabling Blockchain Innovations with Pegged Sidechains" in public,
Based on the theory and technique of the side chain, in 2014, Tendermint team is put forward for the first time across the chain (cross - chain) concept,
In 2015, the currency of Lightning Network (from the Network), through the hash time lock (Hashed Timelock) mechanism, realize the currency under the chain fast transaction channel,
Released a white paper in 2016, BTC Relay, Relay based on cross chain COINS to the etheric lane one-way connection,
In 2017, Polkadot and Cosmos chain infrastructure across relay platform scheme is put forward, in the same year, Wanchain and Fusion across the chain technologies to implement distributed control rights management is put forward,
In December 2017, lightning network officially launched in main currency, and complete the first deal...
Application scenario
Across the chain technology has gradually in the chain of across assets mortgage, hosting, borrowing, derivatives and other financial application scenarios, such as through A chain of mortgage assets get B chain assets, expire if the smooth return B chain assets, users should be back to A chain of mortgage assets; On the other hand, the B chain shall have the right to deal with A chain of mortgage assets, decentralized exchange platform is A typical early cross chain one of the scenes of the application of technology to the ground,
As block chain technology constantly improve the performance, of course, across the chain application will develop from single to diversified, cross chain technology will also be gradually applied to intelligent contracts across the chain, multi-platform DApp deployment, cross link communications predicted machine and so on, through the chain technology chain inside and outside the chain of information interaction, namely complete across the chain of information transmission, sharing, etc., block chain business value can be fully realized,
With the advent of the era of 5 g, the Internet of things may break people, people and information, information and content boundaries, gradually to develop in the direction of link of all things, among them, cross chain between machines and technology will also appear,
Case: based on the well tong SWTC male chain across chain technology
Tong SWTC as well and an important component of the ecological chain, based on well well chang tong SWTC underlying male chain developed digital assets decentralization across chain exchange of technology, and as the chain across the chain technical realization way, set up in chain "chain decentralized digital asset exchange platform",
On May 31, 2018, ETH and ERC20 across chain exchange function, solved the reality through the barrier-free exchange between different male chain, make digital assets across the chain of decentralized switching technology, a great step forward,
Well chang digital cross chain technology at present stage solution is based on the well tong SWTC male chain, all the other blocks of chain of the underlying system access card through intelligent automatic monitoring contract, and automatically mapped to well SWTC male chain, due to the unique function of order book and chain, compared with other decentralized asset exchange platform under the chain of deity, chain, well chang across chain switching technology has the following four advantages:
1. Security: to the Private Key Distributed Control (Distributed Private Key Control), compared to well chang across chain technology ensures that users are cancelled, match, the trade done directly on the chain, the platform does not contact, don't save user keys, only the users themselves to save user's Key wallet, platform would touch can't save, in this way, the platform can't use the user card, even if the trading platform is attacked, because the user through the assets on the block chain, attackers will unable to get the Key to the user, so that the user through the assets is always safe,
2. Confidence: as a result of the user are cancelled trading point to point in the chain for completely, all actual behavior in the block chain network can query, can avoid the traditional centralized mechanism of trading platform, with fictitious trades to control the risk of price, ensure the truthful information,
3. Sharing: sharing market depth, flow rate, due to all users of the deity, match, the transactions are conducted on Wells tong SWTC male chain, all using well chang technology to trade across the chain users (including different trading platform) can share trading market depth and flow rate of the whole chain,
4. Smart: exchange, pass card, automatic dealmaking,
Example:
Are cancelled 1 VCC sold at the price of 50 UST, existing VCC/UST A exchange transactions without the right price, the system will automatically be set to on the chain, automatic completion of two transactions conform to the terms (that is, the market price according to the average price of the current can clinch A deal to sell),
A. in a 1 VCC to sell 10000 SWTC exchange;
B. in exchange 10000 SWTC sold for 55 ust b;
C. finally clinch a deal the price of 1 original deity VCC sell won 55 ust,
Decentralized digital asset exchange platform dealmaking schematic
In addition, according to former decentralized asset exchange platform trading inefficiency, well cheong technology is based on well SWTC male chain can provide no less than 2000 TPS processing speed, can fully satisfy customers' carefree trading experience, and all transactions on the chain tamper-resistant, achieves truly for the user to provide a safe, fair, fair exchange environment, to promote the popularization of digital assets value Internet technology application,
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