Geth-Blockchain

Proof of Authority Ethereum blockchain created using Geth and Puppeth tooling. Consists of two nodes, where one connects applications such as MyCrypto Wallet to retreive balance and send transactions.

Proof of Authority Blockchain

Environment Setup and Dependencies

• Geth and Tools from https://geth.ethereum.org/downloads/
• Download MyCrypto Desktop App from https://download.mycrypto.com/

MyCrypto Wallet Transaction

• Access wallet from Keystore File- Found in node1 and node2 folder
• Use password created for each
• Send transaction using node2 public key from node1 address
• Set gas limit
• Send transaction

Create Nodes

Create node1 and node2

./geth account new --datadir poanode1

./geth account new --datadir poanode2

• This creates a folder for each node with a keystore folder and geth folder

Genesis Creation

Name: blockchainhw1 Set using: --network=blockchainhw1

What would you like to do? 2: Configure new genesis

What would you like to do? (default = create)

1. Create new genesis from scratch

Which consensus engine to use? (default = clique) 2. Clique - proof-of-authority

How many seconds should blocks take? (default = 15)

15

Which accounts are allowed to seal? (mandatory at least one)

0x4ca2448fD7C7745BE7B5f89fb9692c4A8253AFb5 0x6eA91a0133b8B232c59EA2ec1A0401D225eAA0a7

Which accounts should be pre-funded? (advisable at least one)

0xca2448fD7C7745BE7B5f89fb9692c4A8253AFb5 0x6eA91a0133b8B232c59EA2ec1A0401D225eAA0a7

Should the precompile-addresses (0x1 .. 0xff) be pre-funded with 1 wei? (advisable yes)

no

Specify your chain/network ID if you want an explicit one (default = random)

112233

What would you like to do? (default = stats) 2. Manage existing genesis

2. Export genesis configurations

Delete harmony file (not needed)

Control + c to exit puppeth

Initialize node1 and node2

./geth init blockchainhw1.json --datadir poanode1

./geth init blockchainhw1.json --datadir poanode2

• This step initializes each of the nodes for the PoA chain

Start node1 and node2

./geth --datadir poanode1 --mine --miner.threads 1 --unlock 4ca2448fD7C7745BE7B5f89fb9692c4A8253AFb5

./geth --datadir poanode2 --port 30304 --mine --miner.threads 1 --rpc --unlock 6eA91a0133b8B232c59EA2ec1A0401D225eAA0a7 --allow-insecure-unlock --bootnodes enode://b597146c435e9ff736519a7c11b2f8f4f915b112d83fa96cd901fe5edd7a3f1842d7a7bb9c90e4ef9aa65a7dc174017baa85fba4723470fa9f44ee8b8e2b4b1a@127.0.0.1:30303

• This step unlocks each node and gives them the ability to mine and connect to the other node

Watch Transaction mined on poanode1