Ethereum Blockchain Development

Environment Variables

# Ethereum Config
export VERSION="0"                      # 0=host, 1=HTTP
## Wallet
export DATADIR=""                       # Ethereum Keystore
export KEYSTORE=$DATADIR""              # Keystore File Directory
## Networking
export ETH_NETWORK_ID=""                # Chain ID
export HOSTNAME=""                      # HTTP, Web Socket, RPC
## Application Credentials
export PUBLIC_KEY=""                    # Signing Hex Address
export PRIVATE_KEY=""                   # Private Key Hex Address
export PASSWORD_FILE=""                 # KeyStore Password (Unlock Account)
# Ethereum - Swarm Config 
export $SWARM_NODE_NAME=""
export IPC_FILE=""
export SWARM_DATADIR=""
export SWARM_ACCOUNT=""
export SWARM_ACCOUNT_PASSWORD=""

REST-API

~$ go run node.go 

• /
• /blockchain
• /accounts
• /accounts/id/:num
• /accounts/:account
• /accounts/:account/balance
• /accounts/balance
• /eth
• /eth/blocks
• /eth/blocks/tx

Creating an Ethereum Account

geth --datadir ./myNode1 new account  

Save Public Key

Generate Genesis Block

puppeth

Consensus Algorithm: Cleque

Initialize Genesis Block

geth --datadir ./myNode1 init genesis_block.json 

Ethereum Node Setup

• scripts/config.sh
  • Environment variables
• scripts/startU18.sh
  • Start Ethereum node on Ubuntu
• scripts/startBSD.sh
  • Start Ethereum node on FreeBSD
• scripts/GethFunc.js
  • Use Ethereum management API's to perform operations on the blockchain.

Signing Address

export PUBLIC_KEY="0x..."

Ethereum Node Options

construct-block/scripts/startU18.sh

geth 
--networkid 2020
--datadir ./node1/
--preload ./scripts/GethFunc.js
--http
--http.addr "0.0.0.0" 
--http.port 8545
--rpccorsdomain "*"
--rpcaddr "0.0.0.0"
--rpcapi "eth,admin,rpc,txpool,net,web3,personal,miner,debug"
--unlock $PUBLIC_KEY
--password $PASSWORD_FILE
--verbosity 7
--syncmode "full"
--allow-insecure-unlock
--mine
--miner.threads 8
--metrics                                                 # http://localhost:6060/debug/metrics 
--metrics.expensive                                       # http://localhost:6060/debug/metrics/prometheus
--metrics.addr "0.0.0.0" 
--pprof                                                   # http://localhost:6060/debug/pprof  
--pprof.addr "0.0.0.0"                                    
console 2>> Eth.log