# 2.交易 [2.1交易流水](Jiao%20Yi%20Liu%20Shui.html) [2.2退款](Tui%20Kuan.html) [2.3公众号/小程序支付](Xiao%20Cheng%20Xu%20Zhi%20Fu.html) [2.4被扫接口(B扫C)](2.4Bei%20Sao%20Jie%20Kou%20BSao%20C.html) [2.5扣款顺序](2.5Kou%20Kuan%20Shun%20Xu.html) [2.6交易统计](2.6Jiao%20Yi%20Tong%20Ji.html)