Private-Ethereum-POA

Step by step guide to setup Ethereum POA private chain

Steps to setup a POA chain

Set up accounts

geth --datadir firstNode/ account new
geth --datadir secondNode/ account new

store the addresses in a file: accounts.txt

echo 'node1: 323ff270ec892875885d0d91495000edb613aaa1' >> accounts.txt
echo 'node2: 4ec8d45d904370865eaf60127576612ae238eab1' >> accounts.txt

save your passwords in a file:

echo 'your password' > firstNode/password.txt
echo 'your password' > secondNode/password.txt

Genesis file

Create Genesis file using puppeth (or use the same as here).It is highly recommended to allocate some ethers to a couple of addresses in the genesis file, otherwise you’ll not be able to pay for your transactions.

Initialize your nodes:

geth --datadir firstNode/ init genesis.json
geth --datadir secondNode/ init genesis.json

Create a bootnode

The purpose of bootnode is to help nodes discover each other. The bootnode is usually ran on a static IP and thus acts like a cluster where nodes know they will find others.

bootnode -genkey boot.key

Script running on boot-node

bootnode -nodekey boot.key -verbosity 9 -addr :43011

open 2nd terminal and run following command with suggested changes:

geth --datadir firstNode/ --syncmode 'full' --port 30311 --rpc --rpcaddr 'localhost' --rpcport 8501 --rpcapi 'personal,db,eth,net,web3,txpool,miner' --bootnodes 'enode://3ec4fef2d726c2c01f16f0a0030f15dd5a81e274067af2b2157cafbf76aa79fa9c0be52c6664e80cc5b08162ede53279bd70ee10d024fe86613b0b09e1106c40@127.0.0.1:43011' --networkid 1515 --gasprice '1' -unlock '0x323ff270ec892875885d0d91495000edb613aaa1' --password firstNode/password.txt --mine

• Replace --bootnode value with yours and enter your IP address.
• Replace --unlock value by your firstNode account

open 3nd terminal and run following command with suggested changes:

geth --datadir node2/ --syncmode 'full' --port 30312 --rpc --rpcaddr 'localhost' --rpcport 8502 --rpcapi 'personal,db,eth,net,web3,txpool,miner' --bootnodes 'enode://3ec4fef2d726c2c01f16f0a0030f15dd5a81e274067af2b2157cafbf76aa79fa9c0be52c6664e80cc5b08162ede53279bd70ee10d024fe86613b0b09e1106c40@127.0.0.1:43011' --networkid 1515 --gasprice '0' --unlock '0x4ec8d45d904370865eaf60127576612ae238eab1' --password secondNode/password.txt --mine

• Replace --unlock value by your secondNode account.
• Replace --bootnode value with yours and enter your IP address.