Interacting With Chainlink Contracts

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How to Query Chainlink Contracts

This page will provide you with information regarding how to query a Chainlink Aggregator

Included are some examples using bash.

All examples are based on the LINK / USD price feed on Ethereum Mainnet

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Overview

Each Chainlink Aggregator has a wide range of data that you can query.

From historic price data to the timestamp of the most recent completed round, a lot of information is stored on-chain and available for you to query.

This page will be broken out into each major contract type, and then each individual query that can be made, with examples.

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How To Format Request Data

Formatting the data we want to send in our RPC calls is a bit tricky if you've never done it before.

This page will assist you in learning how to do this as well as provide outside resources to make it a bit easier.

Formatting RPC Call Data

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In the Below tables, you can navigate to pages specific to deploying, verifying, and managing/updating each of the contracts.

Additionally, there are also pages specific to the various read and write calls for each contract with bash+curl examples.

While curl is nowhere near the most common way to interact with smartcontracts, I felt it would provide the necessary information in the most basic manner.

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Operator
Example Operator contract address:
Deploying an Operator	Directions on deploying an Operator.sol contract to enable your Chainlink Node to perform Direct Request jobs
Verifying an Operator	Directions on how to verify a deployed Operator contract in etherescan
Managing an Operator	Directions on managing and updating a deployed Operator contract
Read Calls	The Read calls are queries you can make to each Operator to get a bit of information from the contract.
Write Calls	The Write calls available to each Operator that are used to make changes to the contract. An example of a write call would be to change the associated the associated Chainlink Node(s)

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ATestnetConsumer
Example ATestnetConsumer contract address:
Deploying a Testnet Consumer	Directions on deploying an AtestnetConsumer.sol contract to enable your Chainlink Node to perform Direct Request jobs
Verifying an Testnet Consumer	Directions on how to verify a deployed ATestnetConsumer contract in etherescan
Managing an Testnet Consumer	Directions on managing and updating a deployed ATestnetConsumer contract
Read Calls	The Read calls are queries you can make to each ATestnetConsumer to get a bit of information from the contract.
Write Calls	The Write calls available to each ATestnetConsumer that are used to send test requests to Chainlink Node(s)

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EACAggregatorProxy
LINK / USD EACAggregatorProxy contract address: 0x2c1d072e956affc0d435cb7ac38ef18d24d9127c
Deploying an Aggregator Proxy	Directions on deploying an EACAggregatorProxy.sol contract to help manage your own price feed
Verifying an Aggregator Proxy	Directions on how to verify a deployed EACAggregatorProxy contract in etherescan
Managing an Aggregator Proxy	Directions on managing and updating a deployed EACAggregatorProxy contract
Read Calls	The Read calls are queries you can make to each EACAggregatorProxy to get a wide range of data from the proxy's associated AccessControlledOffchainAggregator contract. One such example is to get the latest round data from a price feed.
Write Calls	The Write calls that are available to each EACAggregatorProxy are used to make changes to the contract. An example of a write call would be to change the associated AccessControlledOffchainAggregator

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SimpleWriteAccessController
LINK / USD (Billing) SimpleWriteAccessController contract address: 0x9db83cef9f68b63989e4e82d65d549e7ff2acda9
LINK / USD (Requester) SimpleWriteAccessController contract address: 0x641b698ad1c6e503470520b0eecb472c0589dfe6
Deploying an Access Controller	Directions on deploying a SimpleWriteAccessController.sol contract to build your own price feed.
Verifying an Access Controller	Directions on how to verify a deployed SimpleWriteAccessController contract in etherscan
Managing an Access Controller	Directions on how to manage and update the SimpleWriteAccessController depending on its application
Read Calls	The Read calls are queries you can make to each SimpleWriteAccessController to get relevant information to check access and state of a contract. One such example is to get to check if a provided address has access permissions to make a specified call.
Write Calls	The Write calls that are available to each SimpleWriteAccessController are used to make changes to the contract. An example of a write call would be to replace one Chainlink Node for another.

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AccessControlledOffchainAggregator
LINK / USD AccessControlledOffchainAggregator contract address: 0xDfd03BfC3465107Ce570a0397b247F546a42D0fA
Deploying an OCR Aggregator	Directions on deploying an AccessControlledOffchainAggregator.sol contract to build your own price feed.
Verifying an OCR Aggregator	Directions on verifying a deployed AccessControlledOffchainAggregator contract in etherscan
Managing an OCR Aggregator	Directions on how to manage and update a deployed OCR Aggregator contract
Read Calls	The Read calls are queries you can make to each AccessControlledOffchainAggregator to get a wide range of on-chain data. One such example is to get the latest round data from a price feed.
Write Calls	The Write calls that are available to each AccessControlledOffchainAggregator are used to make changes to the contract. An example of a write call would be to change the adminAddress of a Chainlink Node

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