Clober

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()`

Returns

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`

Getting Started

Lending

Liquid Staking

Liquid Restaking

DEX & AMM

CLOB & Trading

Perpetuals

Yield

Aggregators

Oracles

Launchpad

Streaming

Indexer

AI Agent

Overview

Functions

getCloberBooks()

getCloberBookById()

Contract Addresses

​Overview

​Functions

​getCloberBooks()

​getCloberBookById()

​Contract Addresses

Overview

Functions

getCloberBooks()

getCloberBookById()

Contract Addresses