Local Development Network Setup

This guide walks through how to deploy a local blockchain instance for software development and testing purposes. Alternatively, developers can also develop and test on Fractal's Trickle Testnet.

1. Prerequisites​

i) Install Golang​

https://go.dev/doc/install

Tips for Linux (Ubuntu)​

#first command needs to be run as root, rest as your normal user
wget https://go.dev/dl/go1.18.3.linux-amd64.tar.gz 
sudo su 
rm -rf /usr/local/go && tar -C /usr/local -xzf go1.18.3.linux-amd64.tar.gz

#exit root now
exit

#add to path. For more permanent you should add this line to bottom of your ~/.profile
export PATH=$PATH:/usr/local/go/bin

#check go version
go version

ii) Install Rust

https://rustup.rs/

If already installed, please update to 1.59 or newer

rustup update

iii) Install System Specific Dependencies

Ubuntu

sudo apt update && \
sudo apt upgrade -y && \
sudo apt install -y build-essential libleveldb-dev libssl-dev pkg-config clang libclang-dev librocksdb-dev

MacOS

2. Build Required Binaries​

Fractal can run on both MacOS or Linux. The commands below will build all required binaries to start a local Fractal network.

git clone -b v0.3.19-release https://github.com/FindoraNetwork/platform &&
cd platform &&
make build_release

Please make sure to add all below 3 binaries to your $PATH. By default, they will be copied to ~/.cargo/bin/ which should already be in your $PATH.

• stt: The tool to initialize Fractal Network

• abcid: Fractal core protocol.

• tendermint: Tendermint consensus engine.

3. Install Python3 and toml-cli​

Fractal devnet tools are written in Python3 and use toml-cli to manipulate configuration files. Install Python3 if not already installed. Also, install toml-cli using the command below:

pip3 install toml-cli

and then copy the newly installed toml cli tool to /usr/local/bin to make it visible

cp /Library/Python/3.x/site-packages/toml /usr/local/bin

4. Run Devnet​

Inside your platform directory, execute make devnet in the terminal.

i) What's in devnet?​

Name	Description
node0	The validator
node1	The fullnode
Faucet	The key pair that holds FRA

ii) How to control devnet?​

The local blockchain can be stopped and restarted anytime during development and tests.

• Stop Blockchain: ./tools/devnet/stopnodes.sh

• Restart Blockchain: ./tools/devnet/startnodes.sh

• Start Over: make devnet again.

5. Devnet URLs and Ports​

URL	Purpose
http://127.0.0.1	connects to Findora Electron Wallet
http://127.0.0.1:8545	connects to Web3 HTTP
http://127.0.0.1:8546	connects to Web3 WebSocket

6. Troubleshoot​

• Problem 1

  • Error Message:

    • make build_release fails with go:linkname must refer to declared function or variable

• Solution

  • Update your golang.org/x/sys

    # go to platform/tools/tendermint run following to update  
    go get -u golang.org/x/sys

• Problem 2

  • .findora file is missing

• Solution

  • manually add .findora to your home directory (i.e. directory ~)