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angelodlfrtr/siret_to_tva_fr.rb

Last active February 13, 2017 14:44
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SIRET to no TVA
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siret_to_tva_fr.rb
class String
# SIRET or SIREN to French VAT number
def to_tva
siren = self[0..8].to_i
cle_tva = (((siren % 97) * 3) + 12) % 97
(cle_tva < 10) ? "FR0#{cle_tva} #{siren}" : "FR#{cle_tva} #{siren}"
end
end
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