Data Feeds on Solana
Chainlink provides data feeds on the Solana network. Chainlink data feeds on Solana employ Off-Chain Reporting (OCR) to aggregate data from data providers who pull from both centralized and decentralized exchanges. Chainlink’s Solana deployment has no dependencies on external blockchain networks such as Ethereum. In Solana, storage and smart contract logic are separate. Programs store all the logic similar to an EVM (Ethereum) smart contract. The accounts store all the data. Compared to Solidity, the combination of an account and a program is equivalent to a smart contract on an EVM chain. State and logic are separate in Solana.
Solana programs are stateless, so you don't always need to deploy your program to the network to test it. You can deploy and test your programs on a Solana Test Validator. However, to use Chainlink products on Solana, you must deploy your contract on-chain to one of the supported Solana clusters.
To learn how to mitigate risk to your applications, read the Selecting Quality Data Feeds page.
Chainlink products and Solana clusters
Price Feeds are available on the following Solana clusters:
Solana provides a Testnet cluster that runs newer Solana releases, but Chainlink Data Feeds are not available on this cluster.
See the Solana Data Feeds page for a full list of Chainlink data feeds that are available on Solana.
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Languages, tools, and frameworks
The examples in the Chainlink documentation use the following languages, tools, and frameworks:
- Node.js 14 or higher: Used to run client code
- Rust: A general-purpose programming language designed for performance and memory safety
- Anchor: A framework for the Solana Sealevel runtime that provides several developer tools
- Chainlink Solana Starter Kit: An Anchor based program and client that shows developers how to use and interact with Chainlink Data Feeds on Solana
- Solana CLI: The Solana command line interface
- Git: Used to clone the example code repository
When developing applications to use Chainlink products on Solana, always use a Mainnet release version of the Solana CLI that is equal to or greater than the version currently running on your target cluster. Use solana --version and solana cluster-version to check CLI and cluster versions:
solana --version
solana-cli 1.9.28 (src:b576e9cc; feat:320703611)
solana cluster-version --url devnet
1.9.25
solana cluster-version --url mainnet-beta
1.9.28The examples in this documentation use Solana programs in Rust, but you can also write Solana programs in C. To learn more about the Solana programming model, see the Solana Documentation.
Solana Wallets
When you use Chainlink on Solana, you need a Solana wallet. The Chainlink documentation uses file system wallets and free Devnet SOL tokens to demonstrate examples. When you deploy your programs to the Solana Mainnet, you must use wallets with mainnet lamports.
If you have existing wallets that you want to use for the guides in the Chainlink documentation, find your wallet keypair and make it available in your development environment as a file. You can point Anchor and the Solana CLI to a specific keypair when you deploy or manage your Solana programs.
anchor build
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anchor deploy --provider.wallet ~/.config/solana/id.json --provider.cluster devnet
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solana program show --programs --keypair ~/.config/solana/id.json --url devnet
Program Id | Slot | Authority | Balance
6U4suTp55kiJRKqV7HGAQvFgcLaStLnUA4myg5DRqsKw | 109609728 | E6gKKToCJPgf4zEL1GRLL6T99g2WcfAzJAMvtma1KijT | 2.57751768 SOLWhen you build your production applications and deploy Solana programs to the Mainnet cluster, always follow the security best practices in the Solana Wallet Guide for managing your wallets and keypairs.