TomoChain Private Testnet Setup

This tutorial shows how to set up a private TomoChain Testnet on a local machine. The purpose is to help developers to familiarise themselves with TomoChain's source code and initial setup.

The following will walk you step-by-step to setup a TomoChain private net with three Masternodes.
Install Golang
Reference: https://go.dev/doc/install​
Set environment variables
set GOROOT=$HOME/usr/local/go
set GOPATH=$HOME/go
Prepare TomoChain Client Software
cd $GOPATH/src/github.com/ethereum/go-ethereum
Download source code and build
git init
git remote add [email protected]:tomochain/tomochain.git
git pull origin master
make all
Create shortcuts/alias for easier access
alias tomo=$GOPATH/src/github.com/ethereum/go-ethereum/build/bin/tomo
alias bootnode=$GOPATH/src/github.com/ethereum/go-ethereum/build/bin/bootnode
alias puppeth=$GOPATH/src/github.com/ethereum/go-ethereum/build/bin/puppeth
Setup Chain Fata Folders datadir and Corresponding keystore Folders for 3 Masternodes
mkdir $HOME/tomochain
mkdir $HOME/tomochain/nodes
mkdir $HOME/tomochain/nodes/1 $HOME/tomochain/nodes/2 $HOME/tomochain/nodes/3 
mkdir $HOME/tomochain/keystore/1 $HOME/tomochain/keystore/2 $HOME/tomochain/keystore/3
Initialize / Import Accounts For the Masternodes's Keystore
Initialize new accounts: If there are existing accounts and a preference to import them, please ignore this step and go to Import Accounts
tomo account new \
      --password [YOUR_PASSWORD_FILE_TO_LOCK_YOUR_ACCOUNT] \
      --keystore $HOME/tomochain/keystore/1
tomo account new \
      --password [YOUR_PASSWORD_FILE_TO_LOCK_YOUR_ACCOUNT] \
      --keystore $HOME/tomochain/keystore/2
tomo account new \
      --password [YOUR_PASSWORD_FILE_TO_LOCK_YOUR_ACCOUNT] \
      --keystore $HOME/tomochain/keystore/3
Import accounts
tomo  account import [PRIVATE_KEY_FILE_OF_YOUR_ACCOUNT] \
    --keystore $HOME/tomochain/keystore/1 \
    --password [YOUR_PASSWORD_FILE_TO_LOCK_YOUR_ACCOUNT]
Repeat this step to import two more private keys for our three masternodes.
Customize Genesis Block by Using the puppeth Tool
Run puppeth command and answer questions about your private chain as follows:
puppeth
Set chain name
     > localtomo
Private chain name
Enter 2 to configure new genesis
Enter 3 to select POSV consensus
Set blocktime (default 2 seconds)
Set reward of each epoch
Set addresses to be initial masternodes
Set number of blocks of each epoch (default 900). If you would like to customize epoch number, please update code here common/constants.go:14 EpocBlockRandomize = 900
Set gap (How many blocks before checkpoint need prepare new masternodes set ?)suggestedGap = 5
Enter foundation address which you hold private key
POSV configurations
Enter accounts which you control private keys to unlock MultiSig wallet
MultiSig wallet setting
Enter swap wallet address for fund 55 million TOMO
Initial funds
Export genesis file - Select 2. Manage existing genesis - Select 2. Export genesis configuration - Enter genesis filename
Export genesis file
Control + C to exit
Initialize Your Private Chain with Above Genesis Block
tomo --datadir $HOME/tomochain/nodes/1 init [PATH/TO/GENESIS_FILE]
tomo --datadir $HOME/tomochain/nodes/2 init [PATH/TO/GENESIS_FILE]
tomo --datadir $HOME/tomochain/nodes/3 init [PATH/TO/GENESIS_FILE]
Setup Bootnode
Initialize bootnode key
bootnode -genkey bootnode.key
Start bootnode and copy bootnode information
bootnode -nodekey ./bootnode.key
enode://7e59324b1e54f8c282719465eb96786fb3a04a0265deee2cdb0f62e912337ca
6f[email protected][::]:30301 
Start Masternodes
Start Masternode 1
tomo  --syncmode "full" \     
        --datadir $HOME/tomochain/nodes/1 --networkid [YOUR_NETWORK_ID] --port 10303 \
        --keystore $HOME/tomochain/keystore/1 --password [YOUR_PASSWORD_FILE_TO_UNLOCK_YOUR_ACCOUNT] \
        --rpc --rpccorsdomain "*" --rpcaddr 0.0.0.0 --rpcport 1545 --rpcvhosts "*" \
        --rpcapi "db,eth,net,web3,personal,debug" \
        --gcmode "archive" \
        --ws --wsaddr 0.0.0.0 --wsport 1546 --wsorigins "*" --unlock "[ADDRESS_MASTERNODE_1]" \
        --identity "NODE1" \
        --mine --gasprice 2500 \
        --bootnodes [YOUR_BOOTNODE_INFORMATION] \
        console
Start Masternode 2
tomo  --syncmode "full" \
            --datadir $HOME/tomochain/nodes/2 --networkid [YOUR_NETWORK_ID] --port 20303 \
            --keystore $HOME/tomochain/keystore/2 --password [YOUR_PASSWORD_FILE_TO_UNLOCK_YOUR_ACCOUNT] \
            --rpc --rpccorsdomain "*" --rpcaddr 0.0.0.0 --rpcport 2545 --rpcvhosts "*" \
            --rpcapi "db,eth,net,web3,personal,debug" \
            --gcmode "archive" \
            --ws --wsaddr 0.0.0.0 --wsport 2546 --wsorigins "*" --unlock "[ADDRESS_MASTERNODE_2]" \
            --identity "NODE2" \
            --mine --gasprice 2500 \
            --bootnodes [YOUR_BOOTNODE_INFORMATION] \         
            console
Start Masternode 3
tomo  --syncmode "full" \
            --datadir $HOME/tomochain/nodes/3 --networkid [YOUR_NETWORK_ID] --port 30303 \
            --keystore $HOME/tomochain/keystore/3 --password [YOUR_PASSWORD_FILE_TO_UNLOCK_YOUR_ACCOUNT] \
            --rpc --rpccorsdomain "*" --rpcaddr 0.0.0.0 --rpcport 3545 --rpcvhosts "*" \
            --rpcapi "db,eth,net,web3,personal,debug" \
            --gcmode "archive" \
            --ws --wsaddr 0.0.0.0 --wsport 3546 --wsorigins "*" --unlock "[ADDRESS_MASTERNODE_3]" \
            --identity "NODE3" \
            --mine --gasprice 2500 \
            --bootnodes [YOUR_BOOTNODE_INFORMATION] \
            console
Some explanations on the flags
--verbosity: log level from 1 to 5. Here we're using 4 for debug messages
--datadir: path to your data directory created above.
--keystore: path to your account's keystore created above.
--identity: your full-node's name.
--password: your account's password.
--networkid: our testnet network ID.
--port: your full-node's listening port (default to 30303)
--rpc, --rpccorsdomain, --rpcaddr, --rpcport, --rpcvhosts: your full-node will accept RPC requests at 8545 TCP.
--ws, --wsaddr, --wsport, --wsorigins: your full-node will accept Websocket requests at 8546 TCP.
--mine: your full-node wants to register to be a candidate for masternode selection.
--gasprice: Minimal gas price to accept for mining a transaction.
--targetgaslimit: Target gas limit sets the artificial target gas floor for the blocks to mine (default: 4712388)
--bootnode: bootnode information to help to discover other nodes in the network
--gcmode: blockchain garbage collection mode ("full", "archive")
--synmode: blockchain sync mode ("fast", "full", or "light". More detail: https://github.com/tomochain/tomochain/blob/master/eth/downloader/modes.go#L24)
To see all flags usage
tomo --help
Check Your Private Chain
Connect ipc
tomo attach $HOME/tomochain/nodes/1/tomo.ipc
admin.nodeInfo
eth.getBlock(0)
eth.getBlock(1)
Connect rpc
tomo attach tomo attach http://localhost:1545
eth.getBlock(0)
eth.getBlock(1)
Verify Checkpoints
Wait about 30 minutes to see if your chain passes the first checkpoint
​
tomo attach http://0.0.0.0:1545
eth.getBlock(900)
Troubleshooting
Reset your chain
rm -rf $HOME/tomochain/nodes/1/tomo $HOME/tomochain/nodes/2/tomo  $HOME/tomochain/nodes/3/tomo
tomo --datadir $HOME/tomochain/nodes/1 init genesis.json
tomo --datadir $HOME/tomochain/nodes/2 init genesis.json
tomo --datadir $HOME/tomochain/nodes/3 init genesis.json
Note: we use the Gnosis Multisig Wallet: https://github.com/gnosis/MultiSigWallet

CLI Commands

Tutorials

Last modified 2mo ago

TomoChain Private Testnet Setup

Install Golang

Prepare TomoChain Client Software

Setup Chain Fata Folders `datadir` and Corresponding `keystore` Folders for 3 Masternodes

Initialize / Import Accounts For the Masternodes's Keystore

Customize Genesis Block by Using the `puppeth` Tool

Initialize Your Private Chain with Above Genesis Block

Setup Bootnode

Start Masternodes

Check Your Private Chain

Troubleshooting