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BlockChaindeploy.md

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Install Node and npm:

Go to https://nodejs.org/en/ and install Node and NPM Once node and npm are install verify the version number.

 npm -v

#Step 1 Open the terminal in one machine and run the below command.

sudo apt-get install software-properties-common

Step 2: Installation

Next, run the below command to add the latest Stable Ethereum repository to your sources list.

sudo add-apt-repository -y ppa:ethereum/ethereum

Now run update and Install Ethereum on the machine

sudo apt-get update                      
sudo apt-get -y install ethereum

Step 3: Create Account

Create a new Ethereum Account to run Smart Contracts and Transactions.

geth --datadir ethdata account new

Step 4: Genesis File

You need to create your genesis file.

{

    "config":{
        "chainId":15,
        "homesteadBlock":0,
        "eip155Block":0,
        "eip158Block":0
    },
    "difficulty":"200000",
    "gasLimit":"2100000000",
    "alloc":{
        "9da3813aad90cd9f5b8db5299b39594470728596":{
            "balance":"11111111111111111111111111111111"
        },
        "b3105e05ce0af42842a5f37760967fac2fe83c8a":{
            "balance":"22222222222222222222222222222222"
        }
    }

}

Now we need to initialize the Node with genesis file we created. Run the command below to initialize.

geth --datadir="ethdata" init genesis.json

Step 5: Start Node

Now start the node, using the command below.

geth --datadir="ethdata" --networkid 15 --nodiscover console --unlock 52ced5207daddd2081f623cd3c4bc2ef30b8447f --rpc --rpcport "8000" --rpcaddr "0.0.0.0" --rpccorsdomain "*" --rpcapi "eth,net,web3,miner,debug,personal,rpc"

Make sure to replace the account number here after unlock with your Account number.

Now after successful login, you can see the geth CLI(Command Line Interface)

Step 6: Connect

Let’s connect the nodes. To connect the nodes you need Node-id and its IP Address. In the get CLI(Command Line Interface) enter the below command to get the Node-id.

admin.nodeInfo.enode

You will get the enode id, copy the enode id, we need this to connect to the particular node. Run the below command to connect to the Node.

admin.addPeer("enode://52142d7a2213dd80294ee25e1ed91713c6a64f287060a138d2e06d0aad2a4fa3085626dbf900bd83f3ddf0aa514c48af979a10bad83b2f272d74029de82c206a@35.200.176.0:30303")

Make sure to replace enode id of the current Node and IP of the Node to connect. Do this on the nodes, to connect them. To verify the connections. In the geth CLI enter the below command. admin.peers

admin.addPeer("enode://52142d7a2213dd80294ee25e1ed91713c6a64f287060a138d2e06d0aad2a4fa3085626dbf900bd83f3ddf0aa514c48af979a10bad83b2f272d74029de82c206a@35.200.176.0:30303")

Step 7: Let’s Mine

Now Start Mining in one of the node and you can see blocks getting created on the connected Nodes. To start mining on a Node, in the geth CLI enter the below command.

miner.start()

and to stop mining

miner.stop()