Represent Bridge Fingerprint As String

common/bridgefingerprint/fingerprint.go

@@ -0,0 +1,30 @@
+package bridgefingerprint
+
+import (
+	"encoding/hex"
+	"errors"
+)
+
+type Fingerprint string
+
+var ErrBridgeFingerprintInvalid = errors.New("bridge fingerprint invalid")
+
+func FingerprintFromBytes(bytes []byte) (Fingerprint, error) {
+	n := len(bytes)
+	if n != 20 && n != 32 {
+		return Fingerprint(""), ErrBridgeFingerprintInvalid
+	}
+	return Fingerprint(bytes), nil
+}
+
+func FingerprintFromHexString(hexString string) (Fingerprint, error) {
+	decoded, err := hex.DecodeString(hexString)
+	if err != nil {
+		return "", err
+	}
+	return FingerprintFromBytes(decoded)
+}
+
+func (f Fingerprint) ToBytes() []byte {
+	return []byte(f)
+}