更改app支付 package签名

go/gopath/src/github.com/chanxuehong/wechat/mch/sign.go

@@ -48,6 +48,7 @@ func Sign(parameters map[string]string, apiKey string, fn func() hash.Hash) stri
 		buf = append(buf, '&')
 		h.Write(buf)
 	}
+	fmt.Printf("----bufs1 %s", string(buf))
 
 	buf = buf[:0]