# ExAlipay
An Alipay client that is extendable.
The docs can be found at [https://hexdocs.pm/ex_alipay/0.1.0](https://hexdocs.pm/ex_alipay/0.1.0).
This module defined some common used api and you can easily add new api:
* `page_pay` - alipay.trade.page.pay
* `wap_pay` - alipay.trade.wap.pay
* `app_pay` - alipay.trade.app.pay
* `query` - alipay.trade.query
* `refund` - alipay.trade.refund
* `close` - alipay.trade.close
* `refund_query` - alipay.trade.fastpay.refund.query
* `bill_downloadurl_query` - alipay.data.dataservice.bill.downloadurl.query
* `auth_token` - alipay.system.oauth.token
* `user_info` - alipay.user.info.share
* `transfer` - alipay.fund.trans.toaccount.transfer
* `transfer_query` - alipay.fund.trans.order.query
## Installation
```elixir
def deps do
[
{:ex_alipay, "~> 0.1.0"}
]
end
```
### Example Usage:
Define a module `AlipayClient` that use `ExAlipay.Client`,
`AlipayClient` module will have new defined functions that calling
the same `ExAlipay.Client` functions, the difference is that it stores
the client with module property `@client` for convenient uasge:
```elixir
defmodule AlipayClient do
use ExAlipay.Client, Application.fetch_env!(:my_app, __MODULE__)
end
```
Config your `AlipayClient` in `config/config.exs`:
```elixir
config :my_app, AlipayClient,
appid: "APPID",
pid: "PID",
public_key: "-- public_key --",
private_key: "-- private_key --",
sandbox?: false
```
Use the `page_pay`:
```elixir
AlipayClient.page_pay(%{
out_trade_no: "out_trade_no",
total_amount: 100,
subject: "the subject",
return_url: "http://example.com/return_url",
notify_url: "http://example.com/notify_url",
})
```
IN the handler view of alipay notify:
```elixir
if AlipayClient.verify_notify_sign?(body) do
# process the payment success logic
# ...
# response a plain text `success` tio alipay
else
# response with error
end
```
Extend new api you need that not in `ExAlipay.Client`.
```elixir
defmodule AlipayClient do
use ExAlipay.Client, Application.fetch_env!(:my_app, __MODULE__)
# access the public api `request` that defined in `ExAlipay.Client`
# also possible to use functions in `ExAlipay.Utils` directly
# see: https://docs.open.alipay.com/api_1/alipay.trade.precreate
def pre_create(params), do: request(@client, "alipay.trade.precreate", params)
end
# now we can use the new api
# AlipayClient.pre_create(%{})
```
