# Functions
NewEtherScan creates a new instance of EtherScan.
# Constants
ERC20GasErr is the error message returned from etherscan when there is not enough ETH to pay the transaction fee.
# Variables
CallInterval is the duration between etherscan requests.
# Structs
EtherScan is a rate-limited etherscan api client.
Transaction implemements accounts.Transaction (TODO).