OpenBook

OpenBook V2 is a starting point for building or integrating an exchange, with a program that matches buy and sell orders on Solana. The public repository lists v1.7 deployments for mainnet, devnet and testnet. Choose the network and verify its program identifier before configuring a client; a program deployment is different from the particular trading website that uses it.

For a local build, the README calls for Rust, Solana, Anchor 0.28.0 and Just. Clone with submodules included, then use the documented build, interface generation and test tasks. The repository also contains a TypeScript client. These are development instructions, so a visitor seeking a ready made trading screen will need a separate interface.

The organisation's scripts repository provides examples for creating a market, creating an open orders account, posting or taking an order, and cancelling and reposting. The market creation example builds an OpenBookV2Client with a wallet, network connection and program identifier, then constructs the instructions before submitting them. Its token addresses and settings are example inputs to review, not a universal configuration for another pair. The script includes a transaction submission call, so it should not be run unchanged simply to inspect a market.

Most repository files use the MIT licence, which permits software use without a licence charge. Instruction code used to compile the exchange program is covered by GPL v3, while third party components have their own terms. The client and cross-program integration features use the MIT portions; distributing a derived exchange program has different obligations. Free source access describes the software, not a promise that operating a market or sending Solana transactions costs nothing.