project lotus - 莲

Lotus is an experimental implementation of the Filecoin Distributed Storage Network. For more details, check out the spec.

Development

All work is tracked via issues, and an attempt to keep an up to date view on this exists in the lotus testnet github project board.

Building

Dependencies:

• go1.12 or higher
• rust (version?)
• git
• bzr (some go dependency needs this)

Building:

$ make

Architecture

Lotus is architected modularly, and aims to keep clean api boundaries between everything, even if they are in the same process. Notably, the 'lotus full node' software, and the 'lotus storage miner' software are two separate programs.

The lotus storage miner is intended to be run on the machine that manages a single storage miner instance, and is meant to communicate with the full node via the websockets api for all of its chain interaction needs. This way, a mining operation may easily run one or many storage miners, connected to one or many full node instances.

Notable Modules

Api

The systems api is defined in here. The rpc maps directly to the api defined here using the jsonrpc package in lib/jsonrpc.

Chain/Types

Implementation of data structures used by Filecoin and their serializations.

Chain/Store

The chainstore manages all local chain state, including block headers, messages, and state.

Chain/State

A package for dealing with the filecoin state tree. Wraps the HAMT.

Chain/Actors

Implementations of the builtin Filecoin network actors.

Chain/Vm

The filecoin state machine 'vm'. Implemented here are utilities to invoke filecoin actor methods.

Miner

The block producer logic. This package interfaces with the full node through the api, despite currently being implented in the same process (very likely to be extracted as its own separate process in the near future).

Storage

The storage miner logic. This package also interfaces with the full node through a subset of the api. This code is used to implement the lotus-storage-miner process.

License

MIT + Apache