Module: Bakong::Khqr::Helpers::CutString

Defined in:
lib/bakong/khqr/helpers/cut_string.rb

Overview

Slice off a single TLV (tag, length, value) from the head of an EMVCo string. Returns the parsed parts plus whatever remains for the caller to keep consuming.

Class Method Summary collapse

Class Method Details

.call(string) ⇒ Object 



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# File 'lib/bakong/khqr/helpers/cut_string.rb', line 12

def call(string)
  tag = string[0, 2]
  length = string[2, 2].to_i
  value = string[4, length]
  remainder = string[(4 + length)..] || ""
  { tag: tag, value: value || "", remainder: remainder }
end