Ethereum Smart Contract Tutorial (i) Building ethereum private chain

Environment Description: WIN10 64-bit geth1.6.5

1. Installing Geth

When the installation is complete, create 2 accounts First:

Geth account New

Then build: Mygenesis.json

{

"Nonce": "0x0000000000000042",

"Difficulty": "0x1",

"Alloc": {

"44B9589CFF8890D82053F8FC453C51EB7E1F615E": {

"Balance": "20000009800000000000000000000"

},

"4cbbef71f941a09f3f026d8063fae518ffaf999c": {

"Balance": "20000009800000000000000000000"

}

},

"Config": {

"Chainid": 15,

"Homesteadblock": 0,

"Eip155block": 0,

"Eip158block": 0

},

"Mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000", "Coinbase": " 0x0000000000000000000000000000000000000000 ",

"Timestamp": "0x00",

"Parenthash": "0x0000000000000000000000000000000000000000000000000000000000000000",

"Extradata": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",

"Gaslimit": "0xb2d05e00"

}

To start a private chain:

Geth--identity "Piccetherum"--rpc--rpccorsdomain "*"--datadir "%cd%\chain"--port "30303"--rpcapi "DB,ETH,NET,WEB3"- -networkid 95518 Console

When you see listening on[::]:30303 and welcome to the Gethjavascript console! hints, the instructions have been started successfully

Identity name

DataDir Blockchain Address

Node Information:

Admin.nodeinfo Info First letter must be capitalized

Admin.peers Viewing Peer Nodes

To add a peer node:

Enode corresponding to admin.nodeinfo inside the Enode information, the inside of the IP to change a bit

Admin.addpeer ("enode:// 4b3aee02d139345d7651aa07c7e5d486984834000171c700b6bbe7d5c56070f069efdb103f7d9e2dd0cd4078af53c2d9a59df918366891cc142212dd1 da18d19@[127.0.0.1]:30303 ")

Create account

Personal.newaccount ()

Open Mining:

Miner.start ()

Dig for 5 minutes, the account will be a lot of coins

End Mining Command:

Miner.stop ()

Then download Ethereum Wallet

Official website Download Address: https://github.com/ethereum/mist/releases

Open the Wallet homepage, there are already 705 coins