Merge #47: Implement std::Error for HWI's errors

7f2546f Fix wipe_device (Daniela Brozzoni)
62407d1 Pin once_cell to keep the MSRV to 1.41 (Daniela Brozzoni)
ab07d13 Implement std::Error for HWI's errors (Daniela Brozzoni)

Pull request description:

ACKs for top commit:
  afilini:
    ACK 7f2546f

Tree-SHA512: b113ee8fe71bf18a54b21f32dda5d47bf5dfdc657624ff5ad00351170bbad7a210b153101f6f22108fd39cdb464fcf22d65d21a124a62994784caec42b0730b8

Author: afilini

Cargo.toml

@@ -15,6 +15,7 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = { version = "^1.0" }
 pyo3 = { version = "0.15.1", features = ["auto-initialize"]}
 base64 = "0.13.0"
+once_cell = "=1.14"
 
 [dev-dependencies]
 serial_test = "0.6.0"

src/error.rs

@@ -1,3 +1,5 @@
+use std::fmt;
+
 #[derive(Debug, PartialEq, Eq, Clone)]
 pub enum Error {
     JSON(String),
@@ -22,3 +24,11 @@ impl_error!(serde_json::Error, JSON);
 impl_error!(std::str::Utf8Error, Utf8);
 impl_error!(std::io::Error, IOError);
 impl_error!(pyo3::prelude::PyErr, PyErr);
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl std::error::Error for Error {}

src/interface.rs

@@ -356,7 +356,7 @@ impl HWIClient {
             let output = self
                 .hwilib
                 .commands
-                .getattr(py, "toggle_passphrase")?
+                .getattr(py, "wipe_device")?
                 .call1(py, func_args)?;
             let output = self.hwilib.json_dumps.call1(py, (output,))?;
             let status: HWIStatus = deserialize_obj!(&output.to_string())?;