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Api Consumer

Chainlink

• version 1.0.0

api

oracle

Api Consumer

The APIConsumer contract uses Chainlink, an oracle service, to request data from an external API. The contract sets the Chainlink token and oracle contract addresses in the constructor and specifies the jobId and fee variables. The requestVolumeData function creates a Chainlink request to retrieve volume data from the Cryptocompare API and sends it using the sendChainlinkRequest function. When the API response is received, the fulfill function extracts the volume data from the response and sets the volume variable. The contract also defines the withdrawLink function to allow the owner to withdraw Link tokens from the contract. More info: https://docs.chain.link/getting-started/advanced-tutorial/#contract-example

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Version

1.0.0

Creator

Chainlink

Recent Use

🍞 0xE9e8 downloaded

Last Publish

2/28/2023

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Fully owned and controlled by your wallet.

Documentation

Source Code

requestVolumeData() :

This function is used to request volume data from an external API. It builds a Chainlink request with the job ID, address of the contract, and the selector for the fulfill function. It then adds the API URL, the path for the data, and the times amount to the request. Finally, it sends the request and returns the request ID. (autogenerated documentation)

fulfill(bytes32,uint256) :

This function is used to fulfill a request for a certain amount of data. It takes two parameters, a bytes32 _requestId and a uint256 _volume. It emits an event called RequestVolume, which contains the requestId and the volume, and then sets the volume variable to the _volume parameter. (autogenerated documentation)

withdrawLink() :

This function allows the owner of the contract to withdraw LINK tokens from the contract. It does this by calling the LinkTokenInterface contract at the address stored in the chainlinkTokenAddress() function, and then transferring the balance of LINK tokens from the contract to the msg.sender. (autogenerated documentation)