in_out: Summarize ETH flow for an address
In dapped/eth: Interact with Ethereum

Summarize inflow and outflow of ETH from an address.

in_out(
  address,
  api_key,
  startblock = 0,
  endblock = 999999999,
  startdate,
  enddate,
  get_names = FALSE
)

`address`	Character. A single externally owned account (user Ethereum address).
`api_key`	An Etherscan API key (see Details).
`startblock`	Starting block for transaction query. Default is 0.
`endblock`	Ending block for transaction query. Default is 999999999.
`startdate`	Optional `Date` or `POSIXct` object defining the start date or datetime for the resulting list of transactions to be filtered to. If `startdate` is provided, `startblock` is ignored.If a `Date` object is provided, timezone is assumed to be UTC, and all transactions up to midnight of that date will be included in the filtered result. For `POSIXct` objects, timezone is taken from the object. Note that, `startdate` is applied as a filter after downloading transactions, and so settings a value that is later than the earliest transaction sent/received by the address does not speed up the download process.
`enddate`	Optional `Date` or `POSIXct` object defining the end date or datetime for the resulting list of transactions to be filtered to. Starting block for transaction query. If `enddate` is provided, `endblock` is ignored. If a `Date` object is provided, timezone is assumed to be UTC, and all transactions up to midnight of that date will be included in the filtered result. For `POSIXct` objects, timezone is taken from the object.
`get_names`	Logical. Get contract names for verified contracts?