def purchase(amount, detail = {})
params = {
contract_code: self.contract_code,
user_id: detail[:user_id],
user_name: detail[:user_name],
user_mail_add: detail[:user_email],
item_code: detail[:item_code],
item_name: detail[:item_name],
order_number: detail[:order_number],
st_code: '00000-0000-00000-00000-00100-00000-00000',
mission_code: EpsilonMissionCode::PURCHASE,
item_price: amount,
process_code: EpsilonProcessCode::FIRST,
user_agent: "#{ActiveMerchant::Epsilon}-#{ActiveMerchant::Epsilon::VERSION}",
}
params[:memo1] = detail[:memo1] if detail.has_key?(:memo1)
params[:memo2] = detail[:memo2] if detail.has_key?(:memo2)
params[:user_name_kana] = detail[:user_name_kana] if detail.has_key?(:user_name_kana)
commit('direct_virtual_account.cgi', params, RESPONSE_KEYS)
end