微信支付

添加依赖

def deps do
  [
    {:wechat, "~> x.x", hex: :wechat_sdk},
    {:saxy, "~> 1.2"},
    {:x509, "~> x.x"}
  ]
end

定义支付 Client 模块

defmodule YourApp.WeChatAppCodeName do
  @moduledoc "CodeName"
  use WeChat.Pay,
    mch_id: "1900000109",
    api_secret_v2_key: "api_secret_v2_key",
    api_secret_key: "api_secret_v3_key",
    client_serial_no: "client_serial_no",
    client_key: {:file, "apiclient_key.pem"}
end

定义参数说明请看 options/0

V2 SSL 配置

部分 v2 的接口请求时需要用到证书，如：撤销订单，因此如果有使用到这部分接口，必须添加下面的配置

config :wechat, YourApp.WeChatAppCodeName,
  v2_ssl: [
    certfile: "apiclient_cert.pem", # or {:app_dir, App, "priv/cert/apiclient_cert.pem"}
    keyfile: "apiclient_key.pem" # or {:app_dir, App, "priv/cert/apiclient_key.pem"}
  ]

启动支付 Client 进程

defmodule YourApp.Application do
  def start(_type, _args) do
    children = [
      # ...
      YourApp.WeChatAppCodeName,
      # or
      {YourApp.WeChatAppCodeName, start_options}
    ]

    Supervisor.start_link(children, strategy: :one_for_one, name: YourApp.Supervisor)
  end
end

启动参数说明请看 start_options/0

处理回调消息

详情请看 WeChat.Pay.EventHandler