WechatPay

微信支付: https://open.weixin.qq.com/cgi-bin/frame?t=home/pay_tmpl&lang=zh_CN

It contains:

  • generate access-token
  • App payment
  • verify notify
  • Native payment (Work In Process)
  • JS payment (Work In Process)

MRI Ruby 2.0.0 and newer are supported. 1.9.2 should work as well but not tested.

Installation

Add this line to your application's Gemfile:

gem 'wechat_pay'

And then execute:

$ bundle

Or install it yourself as:

$ gem install wechat_pay

Usage

Config

WechatPay.app_id       = 'YOUR_APP_ID'
WechatPay.app_secret   = 'YOUR_APP_SECRET'
WechatPay.pay_sign_key = 'YOUR_PAY_SIGN_KEY'
WechatPay.partner_id   = 'YOUR_PARTNER_ID'
WechatPay.partner_key  = 'YOUR_PARTNER_KEY'

Access Token

WechatPay::AccessToken.generate # => { access_token: 'ACCESS_TOKEN', expires_in: 7200 }

Your should cache the access_token, see http://mp.weixin.qq.com/wiki/index.php...

You may wanna do something like this in Rails:

Rails.cache.fetch(:wechat_pay_access_token, expires_in: 7200.seconds raw: true) do
  WechatPay::AccessToken.generate[:access_token]
end

Payment params

# Please keep in mind that all key MUST be Symbol
params = {
  body:             'body',
  traceid:          'traceid',      # Your user id
  out_trade_no:     'out_trade_no', # Your order id
  total_fee:        '100',          # 注意：单位是分，不是元
  notify_url:       'http://your_domain.com/notify',
  spbill_create_ip: '192.168.1.1'
}

WechatPay::App.payment('ACCESS_TOKEN', params)
# =>
#   {
#     nonce_str:  'noncestr',
#     package:    'Sign=WXpay',
#     partner_id: 'partner_id',
#     prepay_id:  'prepay_id',
#     timestamp:  '1407165191',
#     sign:       'sign'
#   }

Verify notify

# Rails example

def app_notify
  # except :controller_name, :action_name, :host, etc.
  notify_params = params.except(*request.path_parameters.keys)

  if WechatPay::Notify.verify?(notify_params)
    # Valid notify status
    if params[:trade_state] == '0'
      # Code your business logic
    end
    render text: 'success'
  else
    render text: 'error'
  end
end

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request

License

WTFPL