[openpgp] Port to Gtk4

typings/gpg/errors.pyi

@@ -0,0 +1,36 @@
+from typing import Any
+
+class GpgError(Exception):
+
+    error: Any | None
+    context: str | None
+    result: Any | None
+
+    @property
+    def code(self) -> int: ...
+    @property
+    def code_str(self) -> str: ...
+    @property
+    def source(self) -> int: ...
+    @property
+    def source_str(self) -> str: ...
+
+class GPGMEError(GpgError):
+    @property
+    def message(self) -> str: ...
+    def getstring(self) -> str: ...
+    def getcode(self) -> int: ...
+    def getsource(self) -> int: ...
+
+class KeyNotFound(GPGMEError, KeyError):
+    keystr: str
+
+class EncryptionError(GpgError): ...
+class InvalidRecipients(EncryptionError): ...
+class DecryptionError(GpgError): ...
+class UnsupportedAlgorithm(DecryptionError): ...
+class SigningError(GpgError): ...
+class InvalidSigners(SigningError): ...
+class VerificationError(GpgError): ...
+class BadSignatures(VerificationError): ...
+class MissingSignatures(VerificationError): ...