1.Geth 2.Code editor
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Create a new folder with a name of your choice. for this tutorial, lets say "chain" on your desktop.
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Copy and paste "myGenesis.json" file(ceate file with this code and with same name) and put it in your folder directory(chain).
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Go to command prompt. in your directory, run the following command
geth --datadir ./node1 init myGenesis.json
it will start a private blockchain with Genesis state.
- Provide network id by running this command
geth --datadir ./node1 --networkid 2019 console
it will take you to jS console.
- Create new account that holds mining reward in the console
> personal.newAccount("password Here")
6.Set it as default account for mining reward
miner.setEtherbase(web3.eth.accounts[0])
this command should return true.
- Start mining activity
> miner.start()
- Adding Peers and connecting them together
==> Open another cmd prompt, initialize same genesis file with new data directory like below
geth --datadir ./node2 init myGenesis.json
==> Connect 2nd node with same network id as first node and use different port.
geth --datadir ./node2 --networkid 2019 --port 8081 --ipcdisable --nodiscover console
Above command will instantiate chain with networkid 0f 2019 and port of 8081. but node2 is still not connected to node1. to connect, run following commands.
** Repeat step 5, 6 and 7 to add accounts to node 2. **
==> in the first node console run this command
>admin.nodeInfo
above command will return node info with different parameters. copy the enode value which is like this "enode://.....@" . it is an id of node1. this id is key to connect node2 with node1. we will do it in the next step.
==> in your node2 console,
>admin.addPeer("enode://.....@")
it will return true if, node succesfully conncted. make sure your "enode://...@" value is correct. to confirm if node is connected, run below command in the node1 console
>admin.peers
it will show you conncted node with port id, network id.. etc.
Boom... you have succesfully initiated private blockchain with 2 nodes.