Add KeyCode encoding module.

Same format, but this uses Serde for (de)serialization.

Cargo.toml

@@ -6,6 +6,9 @@ authors = ["Erik Grinaker <[email protected]>"]
 edition = "2021"
 default-run = "toydb"
 
+[lib]
+doctest = false
+
 [dependencies]
 bincode = "~1.3.3"
 clap = { version = "~4.3.21", features = ["cargo"] }
@@ -14,6 +17,7 @@ derivative = "~2.2.0"
 fs4 = "0.6.6"
 futures = "~0.3.15"
 futures-util = "~0.3.15"
+hex = "0.4.3"
 lazy_static = "~1.4.0"
 log = "~0.4.14"
 names = "~0.14.0"
@@ -22,6 +26,7 @@ regex = "1.5.4"
 rustyline = "~12.0.0"
 rustyline-derive = "0.9.0"
 serde = "~1.0.126"
+serde_bytes = "0.11.12"
 serde_derive = "~1.0.126"
 simplelog = "~0.12.1"
 tokio = { version = "~1.31.0", features = [
@@ -40,6 +45,7 @@ uuid = { version = "~1.4.1", features = ["v4"] }
 
 [dev-dependencies]
 goldenfile = "~1.5.2"
+paste = "1.0.14"
 pretty_assertions = "~1.4.0"
 serial_test = "~2.0.0"
 tempdir = "~0.3.7"

src/error.rs

@@ -31,6 +31,18 @@ impl Display for Error {
     }
 }
 
+impl serde::ser::Error for Error {
+    fn custom<T: Display>(msg: T) -> Self {
+        Error::Internal(msg.to_string())
+    }
+}
+
+impl serde::de::Error for Error {
+    fn custom<T: Display>(msg: T) -> Self {
+        Error::Internal(msg.to_string())
+    }
+}
+
 impl From<Box<bincode::ErrorKind>> for Error {
     fn from(err: Box<bincode::ErrorKind>) -> Self {
         Error::Internal(err.to_string())
@@ -43,6 +55,12 @@ impl From<config::ConfigError> for Error {
     }
 }
 
+impl From<hex::FromHexError> for Error {
+    fn from(err: hex::FromHexError) -> Self {
+        Error::Internal(err.to_string())
+    }
+}
+
 impl From<log::ParseLevelError> for Error {
     fn from(err: log::ParseLevelError) -> Self {
         Error::Config(err.to_string())
@@ -73,6 +91,12 @@ impl From<std::array::TryFromSliceError> for Error {
     }
 }
 
+impl From<std::num::TryFromIntError> for Error {
+    fn from(err: std::num::TryFromIntError) -> Self {
+        Error::Value(err.to_string())
+    }
+}
+
 impl From<std::io::Error> for Error {
     fn from(err: std::io::Error) -> Self {
         Error::Internal(err.to_string())