Phala Blockchain

Phala Network is a TEE-Blockchain hybrid architecture implementing Confidential Contract. This repo includes:

• node/: the main blockchain built on Substrate
• phost/: the bridge daemon to connect the blockchain and pRuntime

Overview

The blockchain is the central compoent of the system. It records commands (confidential contract invocation), serve as the pRuntime registray, runs the native token and on-chain governance modules.

pHost is a daemon program that connects the blockchain and the pRuntime. It passes the block data from the chain to pRuntime and passes pRuntime side effects back to the chain.

Related repos:

• phala-docs: The central repo for documentations.
• phala-pruntime: The cotract executor running inside TEE enclaves.
• phala-polka-apps: The Web UI and SDK to interact with confidential contract. Based on polkadot.js.
• plibra-grant-docker: The W3F M2 docker build with the blockchain, pHost and pRuntime.

File structure

.
├── LICENSE
├── README.md
├── node                      Blockchain node
├── pallets
│   └── phala                 Phala pallet
├── phost                     The bridge deamon "pHost"
├── pruntime                  pRuntime, the TEE kernel
├── ring                      Patched ring with wasm support
├── runtime                   Phala Substrate Runtime
└── scripts
    ├── console.sh            Helper script to build & run the blockchain
    └── init.sh

Docker bulid

Plase refer to plibra-grant-docker. It includes both the blockchain and pRuntime.

Native Build

Dependencies

Expand

• Rust

bash curl https://sh.rustup.rs -sSf | sh

• Substrate dependecies:

bash cd node sh ./scripts/init.sh

• LLVM 10

bash wget https://apt.llvm.org/llvm.sh chmod +x llvm.sh ./llvm.sh 10

Build the blockchain and bridge

Make sure you have Rust and LLVM-10 installed.

cargo build --release

The build script enforces LLVM-9 or newer is used. LLVM-9 is needed because of the wasm port of rust crypto library, ring. We have to compile the C code into wasm while keeping the compatibility with the current rustc.

Run

1. Launch two local dev nodes Alice and Bob:

   bash cd node ./scripts/console.sh start alice ./scripts/console.sh start bob

   • The datadir is at $HOME/tmp/(alice|bob)
   • Can be purged by ./scripts/console.sh purge
   • The WebUI can connect to Alice at port 9944.

2. Run pHost (please start pRuntime first):

   bash cd phost ./target/release/phost

Run with tmuxp

You can launch the full stack (semi-automatically) by:

tmuxp load ./scripts/tmuxp/three-nodes.yaml

Or a 4-node testnet-poc2 setup:

CHAIN=poc2 tmuxp load ./scripts/tmuxp/four-nodes.yaml

tmuxp is a convinient tool that can bring up a tmux session with the preconfigured commands running in panes. To play with tmuxp, it also need a tmux installed.