feat: create key in encryption service for merchant and user (#4910)

Co-authored-by: Arjun Karthik <m.arjunkarthik@gmail.com>
Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>

crates/common_utils/src/errors.rs

@@ -145,6 +145,42 @@ where
     }
 }
 
+#[allow(missing_docs)]
+#[derive(Debug, thiserror::Error)]
+pub enum KeyManagerClientError {
+    #[error("Failed to construct header from the given value")]
+    FailedtoConstructHeader,
+    #[error("Failed to send request to Keymanager")]
+    RequestNotSent(String),
+    #[error("URL encoding of request failed")]
+    UrlEncodingFailed,
+    #[error("Failed to build the reqwest client ")]
+    ClientConstructionFailed,
+    #[error("Failed to send the request to Keymanager")]
+    RequestSendFailed,
+    #[error("Internal Server Error Received {0:?}")]
+    InternalServerError(bytes::Bytes),
+    #[error("Bad request received {0:?}")]
+    BadRequest(bytes::Bytes),
+    #[error("Unexpected Error occurred while calling the KeyManager")]
+    Unexpected(bytes::Bytes),
+    #[error("Response Decoding failed")]
+    ResponseDecodingFailed,
+}
+
+#[allow(missing_docs)]
+#[derive(Debug, thiserror::Error)]
+pub enum KeyManagerError {
+    #[error("Failed to add key to the KeyManager")]
+    KeyAddFailed,
+    #[error("Failed to transfer the key to the KeyManager")]
+    KeyTransferFailed,
+    #[error("Failed to Encrypt the data in the KeyManager")]
+    EncryptionFailed,
+    #[error("Failed to Decrypt the data in the KeyManager")]
+    DecryptionFailed,
+}
+
 /// Allow [error_stack::Report] to convert between error types
 /// This auto-implements [ReportSwitchExt] for the corresponding errors
 pub trait ErrorSwitch<T> {