OpenBook v2 IDL

OpenBook v2 is the next-generation fully on-chain order book DEX on Solana. Features improved permissionless market creation, transparent order matching, event consumption, and optimized settlement.

  • open-book
  • v0.1.0
  • DEX / Order Book

Program address

opnb2LAfJYbRMAHHvqjCwQxanZn7ReEHp1k81EohpZb
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Instructions
29
Accounts
6
Events
8
Types
32

What the program exposes

Instructions 29

  • createMarket
  • closeMarket
  • createOpenOrdersIndexer
  • closeOpenOrdersIndexer
  • createOpenOrdersAccount
  • closeOpenOrdersAccount
  • placeOrder
  • editOrder
  • editOrderPegged
  • placeOrders
  • cancelAllAndPlaceOrders
  • placeOrderPegged
  • and 17 more

Accounts 6

  • Market
  • OpenOrdersAccount
  • OpenOrdersIndexer
  • StubOracle
  • BookSide
  • EventHeap

Events 8

  • DepositLog
  • FillLog
  • MarketMetaDataLog
  • TotalOrderFillEvent
  • SetDelegateLog
  • SettleFundsLog
  • SweepFeesLog
  • OpenOrdersPositionLog

Use it in your code

Load the OpenBook v2 IDL with Anchor in TypeScript, Rust or Python.

import { Connection, PublicKey } from "@solana/web3.js";
import { Program, AnchorProvider, Idl } from "@coral-xyz/anchor";

// Load the OpenBook v2 IDL
import idl from "./openbook v2.json";

const PROGRAM_ID = new PublicKey("opnb2LAfJYbRMAHHvqjCwQxanZn7ReEHp1k81EohpZb");

// Set up the provider and program
const connection = new Connection("https://api.mainnet-beta.solana.com");
const provider = new AnchorProvider(connection, wallet, {
  commitment: "confirmed",
});
const program = new Program(idl as Idl, provider);

// Fetch and decode an account
const accountData = await program.account.openBook_v2
  .fetch(accountPublicKey);
console.log("Account data:", accountData);

// Build and send an instruction
const tx = await program.methods
  .initialize(/* ...args */)
  .accounts({
    /* ...required accounts */
  })
  .rpc();
console.log("Transaction signature:", tx);

The JSON

The first 30 lines of openbook v2.json.

openbook v2.json
{
  "version": "0.1.0",
  "name": "openbook_v2",
  "instructions": [
    {
      "name": "createMarket",
      "docs": [
        "Create a [`Market`](crate::state::Market) for a given token pair."
      ],
      "accounts": [
        {
          "name": "market",
          "isMut": true,
          "isSigner": true
        },
        {
          "name": "marketAuthority",
          "isMut": false,
          "isSigner": false
        },
        {
          "name": "bids",
          "isMut": true,
          "isSigner": false,
          "docs": [
            "Accounts are initialized by client,",
            "anchor discriminator is set first when ix exits,"
          ]
        },
        {
...

Frequently asked questions

What is the OpenBook v2 IDL?

The OpenBook v2 IDL (Interface Definition Language) is a JSON schema that describes the on-chain program interface for the OpenBook v2 smart contract on Solana. It defines all available instructions, account structures, events, and types needed to interact with the program. This one has 29 instructions, 6 account types, 8 events and 32 type definitions.

How do I use the OpenBook v2 IDL in my project?

You can use the OpenBook v2 IDL with Anchor framework clients in TypeScript (@coral-xyz/anchor), Rust (anchor-client), or Python (anchorpy). Download the JSON file, import it in your project, and use it to create a Program instance that can call instructions and decode accounts.

What is the OpenBook v2 program address on Solana?

The OpenBook v2 program is deployed at address opnb2LAfJYbRMAHHvqjCwQxanZn7ReEHp1k81EohpZb on Solana mainnet.

What version of the OpenBook v2 IDL is this?

This is version 0.1.0 of the OpenBook v2 IDL. IDL versions follow program deployments and change as the protocol evolves, so check it against the program on-chain before you integrate.

Build on OpenBook v2 with AllenHark

Stream the program's accounts and transactions with Yellowstone gRPC, read its state over Solana RPC, or see its transactions before the block is built with ShredStream. To trade against it, try the trading bots or the PumpFun sniper.

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