Chainlink (LINK) In Practice

Some smart contracts require data from off-chain to be transferred to the blockchain. Learn how Chainlink’s blockchain-agnostic oracle is helping to overcome the data gap.


Chainlink connects to external data sources that feed data into blockchain smart contracts in an efficient, dependable, and secure manner. Chainlink has benefited from a number of big partnerships and interesting developments because many experts believe it is a feasible solution to the “oracle problem.”

Learn how Chainlink functions as a decentralized oracle network for smart contracts.


Chainlink’s Enterprise Applicability

Chainlink is a decentralized oracle network for smart contracts that require secure and dependable links to real-world data outside of the blockchain network.

Because smart contracts can be built on a variety of blockchain platforms, Chainlink is fundamentally blockchain-agnostic — that is, it does not prefer one blockchain over another and does not include any features that make it easier for developers to create only on one.

Chainlink was first designed to connect to the blockchains of Bitcoin, HyperLedger, and Ethereum because they already had a lot of support and integration with significant organizations and institutions.

The Ethereum blockchain is also widely regarded as the current gold standard for programmability, which is critical for smart contract creation (one of the key areas where oracles provide value to a blockchain). Chainlink is still working on external adaptors to help with interoperability with other blockchains.

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Parallel to this, Chainlink is expanding its capability to allow it to integrate with a wider range of data sources by becoming more compatible with an increasing number of application programming interfaces (APIs) that represent real-world data streams.

To make an existing API Chainlink-friendly, only a small bit of coding is required. An API can supply data to smart contract queries through Chainlink’s oracle system once it has been tuned for Chainlink.

Chainlink’s specialized adapters have been developed to be simple to set up in any programming language, making data sources more accessible.

On both the client and data provider sides, Chainlink provides extensive help and resources for software developers.

Chainlink hopes to make it simple for smart contract developers to connect with APIs they already know, as well as enable new revenue streams for data suppliers, who can earn money from smart contract requests once their APIs are Chainlink-compatible. Data suppliers can sell their services to projects on any blockchain network since Chainlink is blockchain agnostic.

Overall, Chainlink plays an important role in establishing and sustaining effective relationships between smart contract developers and the data they require.

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What Is Chainlink’s Real World Use Case?

Chainlink continues to accelerate the development of smart contract use cases by simplifying how smart contracts securely interface with external data.

This broadens and deepens the whole blockchain ecosystem’s breadth and depth of real-world applicability. In other words, smart contract developers may focus their efforts on creating effective smart contracts, knowing that Chainlink has already provided them with a dependable and secure data transport mechanism.

To execute a buy order, a smart contract, for example, needs to know the market price of a digital asset. Chainlink’s decentralized oracle network gathers data from a variety of sources and synthesizes it to deliver far more reliable data than a single, centralized oracle could.

Traders can more correctly estimate risk and reliably measure profit and loss as a result of having access to high-accuracy price data. Chainlink has already created external adaptors for a number of bitcoin market price suppliers, thanks to its increasing network of reliable APIs and data providers (including CoinMarketCap, Crypto Compare, Brave New Coin, and more).

Chainlink’s oracles supply some of the industry’s most precise and dependable crypto price data.

Chainlink also aspires to provide safe, high-quality data to smart contracts that manage payment infrastructure.

Smart contracts can use Chainlink oracles to connect to traditional banking institutions and integrate traditional banking data (such as consumer bank accounts, direct deposit information, SWIFT international payment standards, and more) into their structure.

In addition, Chainlink is working hard to assist existing payment networks in implementing smart contract technologies. External adaptors for PayPal and MisterTango, for example, are currently available for Chainlink and are simple for smart contract writers to integrate into apps that require interaction with these two payment networks.

Insurance claims, data storage, enterprise IT infrastructure, supply chain management, identity identification and other security measures, regulated gambling, and government uses such as voting or property registries can all benefit from blockchain-based smart contract technology.

The use cases listed here are not all-inclusive. Overall, Chainlink facilitates the implementation of a wide range of smart contract use cases.

Another example would be lotteries. Verifiably random number systems (which demonstrate that a number was not chosen in bad faith) can be used for a variety of purposes, including blockchain-based lottery games. In traditional lotteries, the lottery operator must be trusted to stay transparent and not cheat or tamper with the final result.

A decentralized blockchain lottery eliminates the element of trust and creates an incorruptible system by employing provably random numbers.

Chainlink provides a verifiable random function for generating random numbers (VRF). Smart contracts that want to demonstrate that they use random number generation can do so with ease utilizing Chainlink’s VRF.

Non-fungible tokens (NFTs), such as those based on the ERC-721 standard, also require random numbers to be created. NFTs allow for the creation of one-of-a-kind collectible items, with the origin and uniqueness of each being cryptographically documented on the blockchain.

NFTs are widely used to indicate ownership of tangible real-world assets (such as land) or distinct digital assets because they are unique and non-interchangeable (such as digital art).

Random numbers and NFTs also have applications in the increasingly large blockchain-based video gaming and e-sports industry.

Random numbers can be used to create unique NFT-based rewards, and can also help generate unpredictable in-game scenarios. Chainlink makes the randomized creation of NFTs simple and reliable with its sophisticated VRF capability.

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Chainlink Partnerships and Community Growth

Chainlink offers a grant program for innovative smart contract applications and research ideas, with grants ranging from $50,000 to $100,000 USD available for continuous development of integrations that support the Chainlink oracle ecosystem. Ongoing requests for proposals can be made directly to Chainlink.

Solana was the first of many Chainlink Community Grant Program grant recipients.

Solana was awarded a grant to integrate Chainlink oracles with the Solana blockchain platform, thereby broadening Chainlink’s usability for application developers and advancing Chainlink’s objective of being a platform-agnostic service.

Solana uses a one-of-a-kind Proof-of-History (PoH) consensus mechanism to produce a lightning-fast blockchain that can handle up to 50,000 transactions per second.

Solana teamed with Chainlink to develop an extraordinarily fast pricing oracle that can give price data for digital assets in less than half a second, in order to match its throughput.

Chainlink also sponsors community events like hackathons, which put developers’ talents to the test in a competition atmosphere, and award-winning developers with funds to help them continue their work. The victors of the 2020 virtual hackathon used an external adaptor to connect a Tesla Vehicle API to a Chainlink oracle, resulting in a peer-to-peer rental software that employs smart contracts to facilitate agreements between owners and renters.

This is only one example of a smart contract implementation that enables a new business model by connecting a blockchain-based application to external, real-world data utilizing Chainlink oracles.