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Lumos

Introduction

Lumos

Lumos is still under active development and considered to be a work in progress.

Lumos is a full featured JavaScript/TypeScript based dapp framework for Nervos CKB. It aims to simplify dapp development on Nervos CKB. The name explains what the project is about: the wonderland of CKB, though vast and fertile, still remains dark in most of the parts, lumos tries to shed light upon the land, guiding people into this beautiful new world.

Components

As of now, lumos contains the following components:

lumos

lumos: A root package to integrate of common functions from the Lumos sub-package.

ckb-indexer

ckb-indexer: a cell/tx indexer base on ckb-indexer.

rpc

rpc: RPC module for CKB RPC. Provide type definitions for CKB RPC interface.

BI

BI: a big number library for lumos.

helpers

helpers: a helper package containing more utilities. The difference between helpers and base, is that base contains pure stateless functions, while helpers works in a more intrinsic way: it requires config-manager mentioned below to be setup.

common-scripts

common-scripts: integrations for known scripts on CKB. While we try our best to provide integrations for popular CKB scripts, people might be working on innovations every day. As a result, we are also designing a set of APIs, so developers can freely integrate their own scripts into lumos for everyone to use. One integrated, common-scripts should be able to leverage those new scripts as well.

config-manager

config-manager: a manager for dealing with differences between different chains, such as mainnet, testnet, or numerous dev chains. We abstract each chain into individual config file. Once loaded, config manager will be able to handle the chain specific logic, so you don't have to deal with this in your own code.

toolkit

toolkit: JavaScript toolkit for Nervos CKB. It contains a series of independent tools that can aid development of CKB dapps. This is different from a normal CKB SDK, since it tries to minimize the work done in an SDK, while providing more utilities that could be handy.

base

base: a base package containing common types and utilities that are used by most packages. If there is a CKB specific task you need to perform, you might want to look here first. Chances are they are already provided.

transaction-manager

transaction-manager: a transaction manager for CKB. One problem with UTXO based blockchains, is that a certain amount of gap period exists between a transaction is accepted by a blockchain, and when it is actually committed on chain. During this gap, new cells created by the pending transaction will not be available. Transaction manager package takes care of this. It wraps an indexer instance, and makes sure cells created in pending transactions, are also exposed and available for assembling new transactions. This means you are no longer bounded to one transaction at a time, you can freely send series of transactions as you wish.

hd

hd: an HD wallet manager for CKB. It supports mnemonic and keystore, compatible with Neuron and ckb-cli, you can load keystore from Neuron or ckb-cli directly and import mnemonic generated by Neuron.

hd-cache

hd-cache: an HD cache manager for CKB. It build a memory cache for derived addresses and live cells of these addresses.

experiment-tx-assembler

experiment-tx-assembler: here are some experimental features for simplifying the transaction assembling process.

Examples

we have provided some use cases for Lumos, such as interactions with MetaMask, transfers CKB, address conversions, etc. which you can find in examples


Learn more about Lumos