feat: migrate serevices

backend_v1/providers/wechat/funcs.go

@@ -0,0 +1,24 @@
+package wechat
+
+import (
+	"crypto/sha1"
+	"encoding/hex"
+	"math/rand"
+)
+
+// RandomString generate random size string
+func randomString(size int) string {
+	// generate size string [0-9a-zA-Z]
+	const chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	b := make([]byte, size)
+	for i := range b {
+		b[i] = chars[rand.Intn(len(chars))]
+	}
+	return string(b)
+}
+
+func hashSha1(input string) string {
+	h := sha1.New()
+	h.Write([]byte(input))
+	return hex.EncodeToString(h.Sum(nil))
+}