ChainLink (LINK)

ChainLink is blockchain middleware that allows smart contracts to access key off-chain resources like data feeds, various web APIs, and traditional bank account payments. By providing smart contracts secure access to these key resources, ChainLink allows them to mimic real world agreements that require external proof of performance and need to make payment in widely available payment methods e.g. bank payments.


The ChainLink network utilizes the LINK token** to pay ChainLink Node operators for the retrieval of data from off-chain data feeds, formatting of data into blockchain readable formats, off-chain computation, and uptime guarantees they provide as operators. In order for a smart contract on networks like Ethereum to use a ChainLink node, they will need to pay their chosen ChainLink Node Operator using LINK tokens, with prices being set by the node operator based on demand for the off-chain resource their ChainLink provides, and the supply of other similar resources. The LINK token is an ERC20 token, with the additional ERC223 “transfer and call” functionality of transfer(address,uint256,bytes), allowing tokens to be received and processed by contracts within a single transaction. Links

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