web3js
- installation
- the big picture
- network
- create_web3_object
- local hosted with ganache
- remote hosted with infura
- account
- create new account
- get account balance
- wallet
- block chain
- block inspection
- subscribe block headers
- subscribe pending transactions
- contract
- create contract
- call method
- sub event
- transaction
- transaction deploy contract
- transaction send ether
- transaction write to smart contract