Interacting With Chainlink Contracts
From Chainlink Community Wiki
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
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.
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.
In the Below tables, you can navigate to each contract's separate Read and Write RPC calls.
Each page will container example curl requests and example responses.
While curl is nowhere near the most common way to interact with smartcontracts, I felt it would provide the simplest and most detailed information possible.
| EACAggregatorProxy | |
|---|---|
| LINK / USD EACAggregatorProxy contract address: 0x2c1d072e956affc0d435cb7ac38ef18d24d9127c | |
| 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
|
| AccessControlledOffchainAggregator | |
|---|---|
| LINK / USD AccessControlledOffchainAggregator contract address: 0xDfd03BfC3465107Ce570a0397b247F546a42D0fA | |
| 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
|