diff --git a/Cargo.toml b/Cargo.toml
index c5f1c91..d6b38ad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,7 @@ crate-type = ["cdylib"]
 [dependencies]
 # core
 tracing = "0.1"
+thiserror = { version = "1.0.57" }
 # woot
 codemp-woot = { git = "ssh://git@github.com/hexedtech/woot.git", features = ["serde"], tag = "v0.1.2" }
 # proto
@@ -34,13 +35,9 @@ tracing-subscriber = { version = "0.3.18", optional = true }
 
 # glue (java)
 jni = { version = "0.21.1", features = ["invocation"], optional = true }
-jni-sys = { version = "0.3.0", optional = true }
-rifgen = { git = "https://github.com/Kofituo/rifgen.git", rev = "d27d9785b2febcf5527f1deb6a846be5d583f7d7", optional = true }
-log = { version = "0.4.21", optional = true }
-
+#jni-sys = { version = "0.3.0", optional = true }
 # glue (lua)
 mlua = { version = "0.9.6", features = ["module", "luajit", "send"], optional = true }
-thiserror = { version = "1.0.57", optional = true }
 derive_more = { version = "0.99.17", optional = true }
 
 # glue (js)
@@ -64,8 +61,8 @@ pyo3-build-config = { version = "0.19.2", optional = true }
 
 [features]
 default = []
-lua = ["mlua", "thiserror", "derive_more", "lazy_static", "tracing-subscriber"]
-java = ["lazy_static", "jni", "jni-sys", "flapigen", "rifgen", "log"]
+lua = ["mlua", "derive_more", "lazy_static", "tracing-subscriber"]
+java = ["lazy_static", "jni", "tracing-subscriber"]
 java-artifact = ["java"] # also builds the jar
 js = ["napi-build", "tracing-subscriber", "rmpv", "napi", "napi-derive", "futures"]
 python = ["pyo3", "pyo3-asyncio", "tracing-subscriber", "pyo3-build-config"]
diff --git a/src/errors.rs b/src/errors.rs
index 4668c24..e792dd3 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -2,7 +2,7 @@
 //! 
 //! library error helpers and types
 
-use std::{result::Result as StdResult, error::Error as StdError, fmt::Display};
+use std::result::Result as StdResult;
 
 use tracing::warn;
 
@@ -45,36 +45,30 @@ pub type Result<T> = StdResult<T, Error>;
 
 // TODO split this into specific errors for various parts of the library
 /// codemp error type for library issues
-#[derive(Debug)]
+#[derive(Debug, thiserror::Error)]
 pub enum Error {
 	/// errors caused by tonic http layer
+	#[error("tonic error (status: {status}, message: {message})")]
 	Transport {
 		status: String,
 		message: String,
 	},
+
 	/// errors caused by async channels
+	#[error("channel error, send: {send}")]
 	Channel {
 		send: bool
 	},
+
 	/// errors caused by wrong usage of library objects
+	#[error("invalid state error: {msg}")]
 	InvalidState {
 		msg: String,
 	},
 
 	/// errors caused by wrong interlocking, safe to retry
-	Deadlocked,
-}
-
-impl StdError for Error {}
-
-impl Display for Error {
-	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-		match self {
-			Self::Transport { status, message } => write!(f, "Transport error: ({}) {}", status, message),
-			Self::Channel { send } => write!(f, "Channel error (send:{})", send),
-			_ => write!(f, "Unknown error"),
-		}
-	}
+	#[error("deadlocked error")]
+	Deadlocked
 }
 
 impl From<tonic::Status> for Error {