TVL: ~$1M | Type: On-chain Orderbook | Docs: clober.io Overview
Clober is a fully on-chain central limit order book (CLOB) DEX. Unlike AMMs, Clober allows traders to place limit orders at specific price levels, with matching happening entirely on-chain. This is made practical on Monad due to its sub-second block times (~400ms).
Each market is represented as a “Book” with discrete price tick levels. The BookManager contract handles all order placement, cancellation, and matching.
Functions
getCloberBooks()
Returns all active Clober order books (markets).
Returns
| Field | Type | Description |
|---|
bookId | bigint | Unique book identifier |
base | Address | Base token address |
quote | Address | Quote token address |
unitSize | bigint | Minimum order unit in base token |
makerPolicy | object | Maker fee/rebate policy |
takerPolicy | object | Taker fee policy |
bestBid | number | Best bid price |
bestAsk | number | Best ask price |
spread | number | Spread in basis points |
import { getCloberBooks } from 'rampart-monad'
const books = await getCloberBooks()
for (const book of books) {
console.log(`Book ${book.bookId}: bid=${book.bestBid} ask=${book.bestAsk}`)
console.log(`Spread: ${book.spread} bps`)
}
getCloberBookById()
Returns the full state of a specific Clober order book.
Parameters
| Name | Type | Description |
|---|
bookId | bigint | Book identifier from getCloberBooks() |
| Field | Type | Description |
|---|
bookId | bigint | Book ID |
base | Address | Base token |
quote | Address | Quote token |
bestBid | number | Current best bid price |
bestAsk | number | Current best ask price |
spread | number | Spread in bps |
bidDepth | DepthLevel[] | Bid side depth { price, size }[] |
askDepth | DepthLevel[] | Ask side depth { price, size }[] |
lastTradePrice | number | Price of the most recent trade |
volume24h | number | 24h volume in quote token |
import { getCloberBooks, getCloberBookById } from 'rampart-monad'
// Get all books, then read full state of the first one
const books = await getCloberBooks()
const detail = await getCloberBookById(books[0].bookId)
console.log(`Last trade: ${detail.lastTradePrice}`)
console.log(`Bid depth levels: ${detail.bidDepth.length}`)
console.log(`Ask depth levels: ${detail.askDepth.length}`)
Clober’s on-chain orderbook is particularly efficient on Monad due to ~400ms block times. Price levels update in near real-time without requiring WebSocket feeds.
Contract Addresses
| Contract | Address |
|---|
| CloberBookManager | 0xAaA0e933C1E46d04b261e9B4FaAc7AeB93BcCeC1 |
