etherscan sender summary

eth_summary.rb

require 'json'

# data src:
# https://etherscan.io/exportData?type=address&a=<addr>

abort 'usage: ./eth_summary.rb <from addr> <csv filename>' unless ARVG.size == 2
address = ARGV.first
filename = ARGV.last

def process(input)
  input.chomp.split(',').map {|k| k.gsub('"', '')}
end

entries = File.read(filename).lines
keys = process(entries.first)
summary = entries.last(entries.size - 1).reduce(Hash.new(0)) do |s, l|
  entry = Hash[keys.zip(process(l))]

  if entry['From'] == address
    s['total'] += entry['Value_IN(ETH)'].to_f
    s['transactions'] += 1
  end

  s
end

puts summary.to_json