常见问题

Chainlink is the industry standard for building, accessing, and selling oracle services needed to power hybrid smart contracts on any blockchain. Chainlink oracle networks provide smart contracts with a way to reliably connect to any external API and leverage secure offchain computations for enabling feature-rich applications. Chainlink currently secures tens of billions of dollars across DeFi, insurance, gaming, and other major industries, and offers global enterprises and leading data providers a universal gateway to all blockchains.

A blockchain oracle is any system that services a smart contract by providing it with data from an offchain source or connecting it with an offchain system. Oracles enable connectivity between blockchains and real-world data by interfacing with external APIs and data feeds, allowing them to pull data for or push data from a smart contract.

Oracles enable smart contracts to interact with offchain resources. Without oracles, smart contracts can only access data within a blockchain, severely limiting their potential applications. The majority of industry-changing real-world use cases for smart contracts require offchain data and computation for proper execution and often an integration with existing payment rails to settle a contract. For example, a smart contract may require high-quality weather data from a reputable source like AccuWeather to trigger a transaction. It may also require the ability to pay out escrowed fiat currency through existing financial infrastructure, such as a bank checking account.

Real-world data, also known as offchain data or external data, refers to the current global data infrastructure that exists outside of the blockchain that must be brought onchain via oracles to be used by smart contract applications. Like a computer without the Internet, blockchain-based smart contracts have inherent value on their own, such as creating and swapping tokens. However, they become exponentially more powerful when externally connected to the vast and accelerating data and API economy taking root outside the blockchain ecosystem.

The oracle problem, also known as the “smart contract connectivity problem”, refers to a blockchain’s inability to natively pull data from or push data to any external offchain system due to the strong security properties created by a blockchain’s consensus mechanism. 

Blockchain nodes are designed to perform standardized and uniform operations to generate consensus on a set of transactions (solving the double-spend problem). However, they are not suited to answer subjective questions about probabilistic real-world data, as blockchain nodes do not always have access to the same information, making generating consensus on even the most basic data requests challenging and source quality enforcement impossible. It is for this reason blockchains focus on generating definitive truth about the validity of transactions, but limit connections to any offchain systems to ensure the network always remains live and produces deterministic results for incoming transactions. 

In order to create a bridge between the blockchain (onchain) and the outside world (offchain), an additional and separate piece of infrastructure known as an “oracle” is required. However, the use of a centralized oracle can result in manipulated data inputs and outputs, meaning the oracle mechanism itself needs to be highly decentralized to ensure the security of a smart contract’s execution is maintained end-to-end.

The Chainlink Network refers to all of the decentralized oracle networks actively operating using the Chainlink protocol, including individual oracles, data providers running their own node, and node operators. By enabling smart contracts to quickly and securely connect to offchain data sources using decentralized oracle networks, the Chainlink Network helps developers build more robust and diverse blockchain applications using real-world inputs and outputs. Additionally, as middleware between low-level blockchain protocols and external, offchain data sources, the Chainlink Network serves as an abstraction layer for data providers to easily sell their existing APIs to any blockchain network.

A decentralized oracle network consists of multiple blockchain oracles run by independent node operators that are chosen to retrieve and validate data from several different offchain sources. Each of the oracles’ responses within a decentralized oracle network are aggregated together to form a single trusted data point, which can be used to trigger smart contracts on any blockchain and really any system that needs highly reliable data that’s provably accurate. The data delivered onchain can be hosted in a Reference Contract (pull model), and/or delivered directly to consuming smart contracts (push model). 

Chainlink网络由多个去中心化的预言机网络组成，这些网络同时并行，并且相互独立。比如，如果智能合约要请求ETH/USD的喂价，不会通过一个预言机从一个API接口请求数据，而是会通过去中心化的预言机网络，从多个不同的API接口请求数据，并最终聚合成一个数据点。 

Through decentralized computation, Chainlink-powered decentralized oracle networks provide users superior security and reliability guarantees on the inputs and outputs of their smart contract, ensuring that both onchain and offchain components of a decentralized application are tamper-proof end-to-end.

Node operators are the entities that maintain and run the blockchain oracles that make up each Chainlink oracle network providing smart contracts on various blockchains access to external data and resources. These operators consist of professional validators for various blockchain networks, teams of highly experienced DevOps engineers, and leading organizations such as Accuweather, the Associated Press, and Deutsche Telekom MMS that focus specifically on building infrastructure for the Chainlink ecosystem. Additionally, external data vendors and API providers can monetize their data sets by running a Chainlink Node and providing signed data directly to smart contracts. Node operators are able to configure their blockchain oracle node to connect to any offchain data source and onchain blockchain environment, providing a high degree of flexibility. 

Node operators within the Chainlink Network strictly adhere to the best security practices and use external monitoring systems to ensure a secure and reliable operation is maintained around the clock. Third-party marketplaces like market.link provide users insight into the current and historical performance of each individual node operator. Additionally, anybody can become a Chainlink node operator and immediately begin providing smart contracts access to offchain data. If you are interested in running a node, please navigate to our documentation.

Transaction Value Enabled (TVE) is a cumulative flow metric that measures the aggregate monetary value of transactions facilitated by a protocol over a given time period. Chainlink TVE is measured as the total US dollar volume of transactions enabled by Chainlink oracles, specifically every transaction where a Chainlink Price Feed reference contract was called across 11 blockchains that have integrated Chainlink (Avalanche, BNB Chain, Ethereum, Fantom, Gnosis Chain, HECO Chain, Metis, Moonbeam, Moonriver, Optimism, and Polygon). TVE is calculated across millions of transactions using onchain data and resolved across thousands of token prices.

TVE measures both volume and facilitated flow, capturing not only input and output values but also how a protocol is used within transactions to facilitate value securely. Chainlink TVE encompasses a wide variety of transactions and movements within transactions that require Chainlink oracles for accurate price updates, including trading, lending, rebalancing, automated yield farming, stablecoin minting, and many more DeFi use cases.

Chainlink为用户提供了一个易于集成和预构建的去中心化预言机解决方案，可以接入任何区块链上的智能合约。集成Chainlink后，开发者可以聚焦应用的核心商业逻辑，而无需将宝贵的资源花在基础架构开发上。自己运行预言机难度非常大，而且充满了不确定因素，因为预言机是一个很复杂的技术问题，需要持续监控，并投入大量资金和资源才能正常运行。

轻松集成Chainlink去中心化预言机网络可以为众多区块链项目省去自己开发预言机的烦恼，让他们专注于创新和开发应用场景。除此之外，Chainlink用户共同出资将Chainlink预言机网络发展成一项公共事业，因此Chainlink预言机的使用成本远低于自己开发和管理预言机解决方案。比如，越来越多的的DeFi应用开始接入Chainlink喂价并共摊成本。如果你对集成Chainlink有兴趣，请联系我们。

Chainlink生态中包括数百个dApp、区块链、节点运营商和数据提供商，以及一个庞大的研究和开源开发社区。Chainlink网络为包括Aave、Synthetix和Compound在内的领先DeFi应用提供预言机服务，保障着数百亿美元的用户资金。Chainlink是一个无须许可的预言机开发框架，因此任何人都可以在任何时候加入该网络，并立即开始为不断增长的Chainlink生态做出贡献。请参阅Chainlink Price Feeds页面，更深入地了解用户、赞助商和节点运营商名单。

Chainlink的经济模式围绕LINK通证建立，LINK通证用于支付智能合开发者和Web2系统请求的各类预言机服务。另外，LINK通证还可以为加密经济机制提供支撑，激励优质的预言机服务并为用户提供安全保障。 

Chainlink经济机制中的供应方会发布新的预言机服务，并不断优化现有预言机服务，帮助接入Chainlink的智能合约和信任最小化Web2系统提升使用量并捕捉新的费用机会。另外，服务提供方还会通过权益质押（staking）等机制不断提升预言机服务的安全保障，帮助开发者打造更加高级且价值更高的智能合约。

需求方是用户，用户支付给节点运营商LINK通证，以访问预言机服务。节点运营商和社区成员之后还可以质押LINK通证，为预言机节点的服务提供担保。这将建立强大的经济激励和奖惩机制，激励Chainlink预言机节点按时提交准确的预言机报告。随着Chainlink的用户群不断扩展，预言机节点将受到更大激励，竞争不断增长的用户费用。这种竞争将推动预言机节点提高声誉并质押更多LINK通证，以证明自己诚实守信，并在最大程度上提高攻击成本。质押更多的LINK通证还可以为节点带来更多收入机会，因为质押的通证数量越多代表节点越有动力维持高水平服务，并及时提交准确的预言机报告。

在Chainlink的经济模式中，预言机服务的可用性和使用量提高将为节点运营商带来更多费用机会。这将建立一个良性循环，预言机网络可以为用户提供创新的信任最小化服务，增强安全保障，并获得更多的费用机会，最终仅靠用户费用就可以实现盈利。

关于Chainlink经济模式的更多信息，请访问以下资源：

• Chainlink权益质押：长期目标、路线图以及最初实现方案
• Chainlink 2.0经济模式以及信任最小化应用市场 | Sergey Nazarov
• Chainlink预言机网络的安全效果曲线以及未来收入机会
• Chainlink 2.0白皮书

The Chainlink Network is composed of the highest quality Sybil-resistant oracle nodes, operated by leading DevOps and security teams, such as Deutsche Telekom MMS, who have decades of experience running mission-critical infrastructure. The security-reviewed and tamper-resistant nodes that comprise Chainlink oracle networks are highly transparent: Their performance metadata is made publicly available to users and can be found onchain or on third-party sites such as market.link.

Chainlink also employs a defense-in-depth approach where multiple security solutions are used in combination to increase oracle network robustness and reliability. This includes the security design principles underpinning the Cross-Chain Interoperability Protocol (CCIP), cryptoeconomic security through Staking, and much more.

The Chainlink Network consists of hundreds of professionally-operated and community-run nodes, allowing for the creation of numerous Sybil-resistant and tamper-proof oracle networks that can scale up in decentralization as the value being secured rises. Chainlink nodes are operated by professional DevOps and security teams with decades of experience operating mission-critical infrastructure and are already securing tens of billions of dollars of value across multiple blockchain networks. The performance data about each Chainlink node can be found onchain or on independent sites such as market.link.

Chainlink is not a singular monolithic network but rather a collection of more than 1,000 decentralized oracle networks, each configured to meet the specific requirements of its distinct set of users.

While oracle networks share many common characteristics with blockchains—namely decentralization and cryptoeconomic incentives—there are key differences in their operation. Blockchains operate in a highly deterministic and predictable environment, focused on validating transactions using cryptography (private keys and hash functions), as well as historical state (previously validated transactions stored on the ledger). Oracle networks, on the other hand, operate in highly non-deterministic and unpredictable environments where consensus is generated about external events in the real world.

Oracle networks are not static but rather require regular updates and adjustments to maintain a high level of security and reliability. The ability for adjustments to be made in response to unpredictable externalities is how Chainlink has securely scaled to over 1,000 independent oracle networks and can continue scaling to help secure onchain markets that potentially involve trillions of dollars worth of tokenized assets.

In order to meet user demand and continuously improve performance, Chainlink services are updated from time to time to introduce new features and functionalities. Additionally, due to the dynamic nature of offchain environments, swift updates may also be required in response to various externalities. Examples may include, but are not limited to, token migrations, protocol rebrands, extreme market events, and upstream issues with data or node operations.

In alignment with software development best practices, updates can encompass offchain and/or onchain processes as Chainlink services are composed of both onchain smart contract logic and offchain infrastructure such as the Chainlink node client and data provider end-points.

Offchain updates commonly take place at the node operator level, where each individual operator manages their own Chainlink node configuration. Updates can include upgrading to a new Chainlink node software version to improve performance or changing API endpoints in a job specification if a data provider becomes unreliable. Offchain updates can also take place at the data provider level, such as responding to a token migration event or other externalities.

Onchain updates take place at the smart contract level, where a multi-signature safe (multisig) is used to modify onchain parameters relating to a Chainlink service. This can include replacing faulty nodes on a specific oracle network, introducing new features such as Offchain Reporting, or resolving a smart contract logic error. The multisig-coordinated upgradability of Chainlink services involves time-tested processes that balance collusion-resistance with the flexibility required to implement improvements and adjust parameters.

Specifically, the use of a multisig to modify the onchain parameters of Chainlink services allows for a safe, secure, and rapid response to black swan events and other potential incidents on the order of minutes, minimizing service interruption for users. Alternative methods to incident response that don’t utilize a multisig can introduce severe risk to users. For instance, oracle services with immutable onchain logic require a full contract redeployment if any onchain parameter requires modification. This can delay incident response times, introduce significant coordination friction, and necessitate additional actions from users who may not respond in a timely enough manner. 

Signers on Chainlink Gnosis Safe multisigs are selected from multiple high-quality Chainlink node operators with a proven, multi-year track record of securing billions in value within the Chainlink Network, as well as from Chainlink Labs. Signers are also spread across multiple different geographic locations globally and may be rotated on a periodic basis to help mitigate potential risks, such as geographic concentration, as they arise. 

In alignment with industry practices, the identities of signers in Chainlink Gnosis Safe multisigs are not publicly disclosed. Disclosing the exact identities could put those individual signers at risk, such as exposing them to potential spear phishing attacks and other forms of targeted exploitation or social engineering. This balance between transparency and operational security reflects the security-conscious approach taken to every aspect of the Chainlink Network. 

As the Chainlink ecosystem continues to evolve, so too has the approach taken to the upgradability of different oracle networks. For example, all onchain security-critical configuration changes and upgrades to the Cross-Chain Interoperability Protocol (CCIP) must pass through a Role-based Access Control Timelock (RBACTimelock) smart contract. Any proposal must either (1) be proposed by a dedicated ManyChainMultiSig contract and then be subjected to a review period, during which the node operators securing CCIP are able to veto the proposal; or (2) be proposed by a dedicated ManyChainMultiSig contract and be explicitly approved by a quorum of the node operators securing CCIP, providing an alternative path during time-sensitive circumstances. 

Any onchain update that passes the timelock without a veto becomes executable by anyone, which can be done by running a timelock-worker to process executable upgrades. Additionally, CCIP uses a novel ManyChainMultiSig contract structure, which supports the signing of multiple transactions that target multiple chains with a single set of signatures. This provides a scalable solution to managing various CCIP configurations across a growing number of supported blockchains.

With Chainlink Staking v0.2, all onchain security-critical configuration changes and upgrades must pass through a timelock smart contract, which features a time delay of up to a few weeks, with critical configuration changes taking the longest (longer than the unbonding period for withdrawing staked LINK). This allows the community to review and choose to opt out of such changes before they are implemented onchain. 

此外，Chainlink是通用的模块化协议，可以定制化预言机网络，以满足用户的具体需求。比如用户可以建立并发布自己的Chainlink预言机网络，自定义参数配置和升级流程。 

Security is the number one priority for the Chainlink ecosystem, a north-star objective we do not compromise on. As new technologies arise and the Chainlink platform expands, we will continue to evaluate and implement the best and most secure processes for managing the upgradability of Chainlink services. Information on the upgradability of Chainlink Data Feeds can be found in the Chainlink Documentation.

Yes. The Chainlink source code can be viewed at https://github.com/smartcontractkit.

优质数据与付费API-- Chainlink网络拥有身份认证管理能力，即可以从受密码保护的付费数据源获取数据传输至智能合约。免费数据API虽然也可以用，但是从付费API获取数据才能更好地在交易中心保护用户资金。 

‍Flexibility - The Chainlink Network is a highly flexible and blockchain-agnostic oracle framework utilized by DeFi applications, web services, and traditional enterprises alike. By acting as a universal blockchain abstraction layer, users can leverage Chainlink to transmit any kind of data to and from any blockchain environment as desired. 

‍Highly secure and transparent nodes - Chainlink oracle networks consist of security-reviewed and tamper-resistant nodes, such as Deutsche Telekom MMS. These nodes are highly transparent, and their performance data are publicly available to all users at market.link. 

Decentralized and Sybil-resistant networks - Chainlink is the most decentralized oracle network, consisting of security-reviewed nodes that are backed by professional teams, allowing for the creation of numerous Sybil-resistant and tamper-proof oracle networks that can scale up as the value being secured rises. 

深度防御--Chainlink采用了深度防御机制，结合多个安全解决方案，提升预言机网络的稳健性和可靠性。其中包括隐私保护加密技术DECO、可信硬件Town Crier、隐性/显性权益质押的加密经济安全机制以及声誉系统等等。这种多层次的安全机制提高了Chainlink端到端的可靠性。

应用和网络效应--Chainlink是DeFi中应用最广泛的预言机 ，为Aave、Synthetix、yearn.finance等创新DeFi协议保障了数十亿美元的价值，并形成了不断增长的网络效应，吸引了更多的用户。Chainlink经历了多轮的安全审核，并在主网上得到了时间的检验。 

‍Solid security foundation and world-class research - Chainlink is supported by a multitude of leading engineers and academics, such as Chainlink Labs Chief Scientist Ari Juels, Chainlink Labs Chief Research Officer Dahlia Malkhi, and Chainlink Labs Chief Product Officer Kemal El Moujahid. The researchers working on the Chainlink protocol are industry experts in blockchain oracles and are responsible for some of the most innovative developments in the space, such as DECO, VRF, Mixicles, Town Crier, and more.

Patenting inventions is a common practice around new technologies and can help protect public goods like Chainlink from frivolous litigation and bad actors who could claim ownership of technology that they did not develop. Notable open-source platforms have used patents as a way to help ensure key technologies remain viable and accessible for the long term.

Chainlink nodes can access any authenticated or premium data source API through the use of modular external adapters. External adapters can be written in any programming language and hosted as a serverless function on any cloud provider or web server. These adapters allow Chainlink nodes to access a wide array of data sources, including authenticated and private APIs that require sensitive password keys, such as enterprise backends and subscription-based sources. Thus, Chainlink nodes have a high degree of flexibility as API credentials can be kept offchain and stored securely, separate from the node itself.  

Chainlink网络采用了多层数据聚合机制，避免单点故障或单一数据源。这种多重保障不仅可以使高值智能合约获取优质数据，还可以保障Chainlink喂价充分覆盖市场，并反映资产真实的市场价格。Chainlink喂价目前保障着数十亿用户资金，因此这些数据聚合层也守护着整个DeFi生态的安全。

首先是在数据源层面聚合，专业的数据聚合商（如BraveNewCoin和CoinGecko）从几百家交易平台获取价格数据，并综合考虑交易量和流动性差异，最终生成一个加权参考价格。其次是在节点运营商层面聚合，每个Chainlink节点都会从多个数据聚合商获取价格数据，并取中位数，剔除异常值，避免API接口断开的风险，确保每个节点都从多个数据源获取数据。最后是在预言机网络层面聚合，基于多个预言机节点的响应取中位数，避免某一个预言机节点操纵最终输入到智能合约的喂价。以上这三层聚合层可以保障智能合约获得最优质的数据，并充分反映真实的市场价格。

若想了解更多关于预言机安全机制的内容，请参考《深度分析DeFi智能合约的数据质量问题》，以及《Chainlink喂价的三个数据聚合层》。

The Chainlink Price Feeds page provides real-time visualizations of each decentralized price feed that provides onchain exchange rates for cryptocurrencies, stablecoins, commodities, and indices. Users can explore each individual price feed, which offers transparency around which nodes power each feed, each node’s latest response, how often feed updates occur, the gas price paid by each node, the users sponsoring each feed, and hyperlinks to onchain transactions.

LinkPool的market.link 是一个无须许可的市场，节点运营商可以在上面展示其历史性能数据并列出预言机服务内容。用户可以基于这些数据过滤并分析每个节点的收益、gas费用和响应时间。开发者还可以请求Chainlink市场的Metrics API，访问所有原始数据，并接入Chainlink网络中的实时预言机性能数据开发自己的分析框架。

Through offchain reporting and threshold signatures, Chainlink oracle networks can scale to thousands of secure nodes within a network. Instead of each node making their own onchain transaction for each update, node responses are aggregated offchain, and only a single transaction needs to be submitted onchain. The security of data is cryptographically maintained throughout the entire process. This allows for the creation of Chainlink oracle networks that are highly decentralized while remaining cost-efficient and secure against manipulation through a defense in depth approach. Additionally, unlike other oracle projects, each Chainlink oracle network is entirely independent of one another and does not affect the scalability or throughput of any other Chainlink Network.

Offchain Reporting (OCR) is the third and latest version of the Chainlink Core software client run by Chainlink nodes, which significantly improves the efficiency of how data is aggregated by Chainlink oracles. OCR reduces operating costs by up to 90% and enables the Chainlink Network to generate a 10x increase in the amount of secure, real-world data available to smart contract applications. 

OCR allows Chainlink nodes to communicate offchain and aggregate data at zero gas costs using a distributed, peer-to-peer network. In OCR’s computation model, each node fetches data from one or multiple data sources, signs it with their unique private key, and broadcasts it to the rest of the oracle network offchain. Once a sufficient number of responses have been generated, a single transaction is transmitted onchain containing every node’s observation. The oracle report and node signatures are then validated onchain by a smart contract, providing the transparency and end-to-end security guarantees that are fundamental to Chainlink oracle networks. 

所有在线的Chainlink节点都可以同时运行OCR和FluxMonitor客户端，即实现了客户端的多元化，又通过备份保障安全。要深入了解OCR的设计目标和报告生成过程，请阅读OCR协议白皮书。

Offchain computation refers to trust-minimized executions that are performed outside of a blockchain environment by Decentralized Oracle Networks (DONs). The Chainlink Network provides a wide range of offchain computations that significantly enhance the capabilities of smart contracts and blockchain networks, including scalable code execution, oracle update transaction batching, random number generation, privacy-preserving contracts, fair transaction ordering, and more. The offchain computations performed by DONs extend Chainlink’s functionality far beyond secure data delivery while meeting the decentralized computation guarantees that are fundamental to blockchain technology.

Hybrid smart contracts are an evolution of smart contract design that was pioneered in the Chainlink 2.0 Whitepaper, in which contracts are securely composed of both onchain and offchain computing resources. Hybrid smart contracts are made possible by Chainlink Decentralized Oracle Networks (DONs), which provide a multiplicity of offchain services to existing and future blockchain networks, enabling feature-rich, privacy-preserving, and scalable smart contract applications.

Chainlink Data Feeds是去中心化的预言机网络，为Aave、Synthetic和Compound等领先DeFi应用聚合金融市场数据。Chainlik Price Feeds拥有大量经过安全评估的专业预言机节点以及付费数据聚合商，广泛覆盖各类资产，并为智能合约输入安全的外部市场数据，帮助开发者高效创新。 

Chainlink Data Feeds由Chainlink及其广大社区用户共同出资，打造出安全的去中心化预言机网络。网络每增加一个新用户，当前和未来的用户就可以通过分摊的方式花费较低成本获得更高的成本效益和更安全的预言机网络。随着DeFi生态的日益壮大，Chainlink Data Feeds也成为了主流的解决方案，为智能合约提供更简便的方案打造安全的金融智能合约应用。

智能合约生态一直在不停发展。因此，也需要不断评估Chainlink生态中Data Feeds在所有区块链和layer-2网络中的使用情况和经济效益。

Data Feeds with low or no usage or feeds that do not have a viable path to economic sustainability may be scheduled for deprecation. Doing so not only helps preserve blockchains as public goods by optimizing blockspace usage, but it helps reduce unnecessary costs incurred by Chainlink node operators. This process is part of a broader ecosystem shift towards Chainlink Economics 2.0, designed to maximize the adoption of the Chainlink protocol while optimizing for cost-efficiency and long-term economic sustainability. Over time, new Data Feeds may be launched or relocated to alternative blockchains/layer-2s that better reflect current user demand.

在Chainlink文档中可以查看弃用的Data Feeds列表及其相应的关闭日期：https://docs.chain.link/docs/deprecating-feeds/。

关于Data Feeds的状态更新，请加入Chainlink Discord群组并订阅data-feeds-user-notifications频道：https://discord.gg/Dqy5N9UbsR。

Developers are responsible for maintaining the security and user experience of their applications. They must also securely manage all interactions between their applications and third-party services.

In particular, developers implementing Chainlink Data Feeds in their code and applications are responsible for their application’s market integrity and code risks that may cause unanticipated pricing data behavior. For more information about developer responsibilities, please refer to: https://docs.chain.link/data-feeds/developer-responsibilities

Chainlink VRF brings secure random number generation to the blockchain. Chainlink VRF solves the difficult problem of providing an onchain source of randomness that is publicly verifiable to be authentic and tamper-proof. Many smart contracts are augmenting the value they can create by utilizing Chainlink VRF, specifically applications such as gaming dApps that must prove to their users that their source of randomness is provably fair and resistant to manipulation from any external entity. Chainlink VRF enables and accelerates the development of smart contracts focused on blockchain gaming, security, layer-two protocols, and various other use cases.

Chainlink Automation is a decentralized solution that enables projects to perform key smart contract functions and DevOps tasks in a highly reliable, trust-minimized, and cost-efficient manner. Individual developers, teams, and DAOs can utilize Chainlink Automation as an offchain computation layer to reliably perform key functions and unlock advanced utility.

A decentralized network of nodes provides trust-minimized and reliable automation with no single point of failure, mitigating risks around manual interventions or centralized servers. Projects using Chainlink Automation are able to reduce time spent on DevOps, eliminate automation infrastructure costs, and build faster and more efficiently.

Chainlink Proof of Reserve provides smart contracts with the data required to calculate the true collateralization of any onchain asset backed by offchain reserves such as stablecoins and cross-chain assets. Operated by a decentralized network of oracles, Chainlink Proof of Reserve enables the autonomous auditing of collateral used within DeFi in real-time, ensuring users’ funds are protected from unforeseen fractional reserve practices and other fraudulent activity from offchain custodians. This provides both the growing DeFi ecosystem and the traditional financial system a way to increase the transparency of operations with definitive onchain proof of any asset’s true collateralization.

跨链互操作协议（CCIP）为开发者提供了一个通用的开放标准，以打造安全的服务和应用，可以在多个区块链网络中发送消息、传输通证并触发执行。

CCIP为智能合约开发者提供了一个可以进行计算的通用基础架构，用于在区块链网络中传输数据和智能合约指令。CCIP将支持各种跨链服务，如Chainlink可编程通证桥。用户将能够以高度安全、可扩展且具有成本效益的方式在任何区块链网络中转移通证。

DECO is a novel privacy-preserving oracle protocol that allows users to prove facts about their web (TLS) sessions to oracles without unveiling any confidential information onchain. 

DECO由康奈尔大学的学者开发，并被Chainlink收购。这项技术加强了HTTP和TLS协议的数据安全性，在从各个隐私和付费数据源传输数据的过程中保障了数据的隐私和防篡改性。另外，DECO还采用了高级密码学和零知识证明技术，保护数据隐私，甚至连最终使用数据的一方都无法查看数据内容。DECO采用了创新的方式传输隐私和付费数据，并能实现前所未有的数据隐私和安全性。

这个额外的数据安全层能够通过Chainlink预言机延伸至各类web系统、区块链以及智能合约。Chainlink节点接入DECO后可以实现：

• 接入付费数据源，一直以来付费数据源由于隐私问题无法将优质数据传输至区块链，而现在就可以将数据传输至各个区块链和DeFi协议了。 
• Enterprises will be able to prove the state of private data to other enterprises and blockchain records without revealing internal data onchain.
• 消费者能够向智能合约证明身份或银行账户余额等个人数据，并无须授权应用查看其个人账户，因此可以保障其个人隐私。

Chainlink拥有稳健且可定制化的去中心化预言机网络开发框架，可以为任何需要连接链下数据保障智能合约安全的个人或团队实现价值。如今，有数以百计的团队正在开发dApp、区块链、行业联盟以及企业级项目，其中有越来越多的团队都接入了Chainlink为其智能合约提供防篡改的数据输入和输出。Chainlink已经成为了DeFi行业主流的预言机解决方案，为Aave、Synthetix和Compound等顶级项目，并保障整个行业数十亿的价值。

如果您想深入了解Chainlink如何为您的项目提供解决方案，请加入我们的官方Discord频道，并提交集成申请表联系我们。

Secure oracles that provide tamper-proof inputs and outputs for smart contracts are required for the vast majority of valuable smart contract use cases.

Robust and decentralized Chainlink Price Feeds for powering DeFi, verifiable randomness for onchain gaming, smart contract execution with Chainlink Automation, additional security and transparency with Chainlink Proof of Reserve, premium weather data for parametric insurance, cross-chain communication with CCIP, and enterprise blockchain middleware are just a small handful of applications powered by Chainlink’s oracle infrastructure.

Additionally, Chainlink oracle networks not only benefit onchain smart contracts but also benefit offchain systems, providing them with a reliable source of censorship-resistant and tamper-proof data that is cryptoeconomically secured. High-value enterprise backend systems can use Chainlink’s data as inputs to ensure only the highest quality data is being utilized to trigger mission-critical business functions. This greatly broadens the use case of oracles and can provide the global economy with even more verifiable data sources around the definitive state of the world. 

请查看《Chainlink的77个智能合约应用场景》一文以及下方分类，以深入了解如何应用去中心化预言机。 

• 去中心化金融
• 链下支付
• NFT、游戏和随机数
• 保险
• 企业系统
• 供应链
• 公用事业
• 授权和身份
• 政府
• 可持续发展
• Offchain computation

去中心化金融（通常被称为DeFi）正在不断发展壮大，其理念是采用去中心化技术架构创新传统金融工具。去中心化金融摒弃了传统的中心化实体，用户可以使用去中心化网络中的开源软件在金融市场中交易并借贷资产。最终，金融市场将演化成自动运行的P2P机制，开放透明，并且完全由数据驱动。

Chainlink预言机网络开发出了可持续且防篡改的喂价，目前接入了多个顶尖的DeFi应用，保障数十亿美元的价值。Chainlink为智能合约提供了新型的数据输入，并同时保障了智能合约的安全性和可靠性，为DeFi行业的发展起到了至关重要的作用。

In the current price reference feed model, independent nodes in the Chainlink Network monitor for price changes offchain, trigger an update when the price change hits a defined threshold (e.g. 1%), fetch aggregated market prices from high-quality data providers, and then aggregate node responses to generate a highly available and manipulation-resistant price update onchain. Smart contracts can then access an extremely accurate price using a simple function call.

接入了Chainlink喂价的部分用户：

• Synthetic asset platforms that require the price of real-world assets in order to mint their representation onchain. These platforms use Chainlink reference contracts to create tokens tied to real-world assets, such as gold, indices, or even car loans.
• 借贷平台，需要接入喂价，保障抵押率充足。这些平台接入Chainlink可以发放和结算贷款、清算抵押并且计算利息。
• 稳定币，需要接入喂价决定抵押物价值。这些平台接入Chainlink可以创建锚定法币、货币篮子或大宗商品的稳定币。
• 资产管理平台，需要接入可靠的喂价重新平衡资产比例。这些平台接入Chainlink可以运行中心化的交易平台（DEX）、调节资金池或实现多种支付方式。

访问data.chain.link，查看所有Chainlink Price Feeds。

Chainlink为您提供了各种活跃的信息渠道，可以在上面发现最新的Chainlink公告和有用的技术资源，并与社区其他成员相互认识。下方是Chainlink官方渠道列表，请在点击前再三确认链接地址，以保障安全访问官方Chainlink页面。Chainlink绝不会让您输入密码、助记词、私钥或其他保密信息。 

• 博客：https://blog.chain.link/
• Discord: https://discord.com/invite/chainlink
• 文档：https://docs.chain.link/
• Events: https://events.chain.link/
• GitHub:https://github.com/smartcontractkit/chainlink
• Kakao: https://open.kakao.com/o/gWXAAf0b
• Lens Protocol: https://lenster.xyz/u/chainlink
• LinkedIn: https://www.linkedin.com/company/chainlink-labs/
• Newsletter: https://pages.chain.link/subscribe
• Reddit:https://www.reddit.com/r/Chainlink/
• TikTok: https://www.tiktok.com/@chainlinkofficial
• Twitch: https://www.twitch.tv/chainlinklabs
• @Chainlink Twitter: https://twitter.com/chainlink
• @ChainlinkLabs Twitter: https://twitter.com/chainlinklabs
• @SmartContract Twitter: https://twitter.com/SmartContract
• 微信：https://blog.chain.link/chainlink-chinese-communities/
• YouTube: https://www.youtube.com/c/chainlink
• Telegram：https://t.me/chainlinkofficial

For status updates regarding Chainlink Data Feeds, users should join the official Chainlink Discord and follow the data-feeds channel: https://discord.gg/Dqy5N9UbsR

Chainlink开发团队正在不断地构建网络和协议。要想了解当前的进展，你可以关注Chainlink Github。你可以在Chainlink Labs的招聘网页上查看完整的岗位招聘列表。

如果需要咨询安全或集成方面的问题，请联系Chainlink官方渠道的管理员或发邮件至 support@chain.link。你也可以在文档中查看更多的技术信息。 

时刻注意安全，确保社区各个平台上与您交流的管理员身份可信且经过验证。您可以在聊天窗口中点击他们的名字，或在官方渠道信息栏中查看他们的身份信息，以核实其身份。

有许多项目致力于开发Chainlink生态，其中包括Chainlink Labs。你可以在Chainlink Labs的招聘网页上找到完整的招聘职位列表。