From 7e4015a38180f8f3dd172fd342d86e18f08b590d Mon Sep 17 00:00:00 2001
From: "hinto.janai" <hinto.janai@protonmail.com>
Date: Fri, 6 Sep 2024 18:06:50 -0400
Subject: [PATCH 1/3] replace `RpcError` with `anyhow::Error`

---
 Cargo.lock                       |  1 -
 Cargo.toml                       |  1 +
 rpc/interface/Cargo.toml         |  2 +-
 rpc/interface/README.md          |  9 +++---
 rpc/interface/src/lib.rs         |  2 --
 rpc/interface/src/rpc_error.rs   | 53 --------------------------------
 rpc/interface/src/rpc_handler.rs |  2 +-
 rpc/interface/src/rpc_service.rs | 12 +++-----
 8 files changed, 13 insertions(+), 69 deletions(-)
 delete mode 100644 rpc/interface/src/rpc_error.rs

diff --git a/Cargo.lock b/Cargo.lock
index 426fced1..3ca5d6af 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -800,7 +800,6 @@ name = "cuprate-rpc-interface"
 version = "0.0.0"
 dependencies = [
  "axum",
- "cuprate-database",
  "cuprate-epee-encoding",
  "cuprate-helper",
  "cuprate-json-rpc",
diff --git a/Cargo.toml b/Cargo.toml
index 8704cb78..2d718936 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -48,6 +48,7 @@ opt-level     = 1
 opt-level = 3
 
 [workspace.dependencies]
+anyhow                = { version = "1.0.87", default-features = false }
 async-trait           = { version = "0.1.74", default-features = false }
 bitflags              = { version = "2.4.2", default-features = false }
 borsh                 = { version = "1.2.1", default-features = false }
diff --git a/rpc/interface/Cargo.toml b/rpc/interface/Cargo.toml
index 56f3fd49..feb1affb 100644
--- a/rpc/interface/Cargo.toml
+++ b/rpc/interface/Cargo.toml
@@ -17,8 +17,8 @@ cuprate-epee-encoding = { path = "../../net/epee-encoding", default-features = f
 cuprate-json-rpc      = { path = "../json-rpc", default-features = false }
 cuprate-rpc-types     = { path = "../types", features = ["serde", "epee"], default-features = false }
 cuprate-helper        = { path = "../../helper", features = ["asynch"], default-features = false }
-cuprate-database      = { path = "../../storage/database" }
 
+anyhow     = { workspace = true }
 axum       = { version = "0.7.5", features = ["json"], default-features = false }
 serde      = { workspace = true, optional = true }
 tower      = { workspace = true }
diff --git a/rpc/interface/README.md b/rpc/interface/README.md
index eb878643..fa5496c1 100644
--- a/rpc/interface/README.md
+++ b/rpc/interface/README.md
@@ -45,15 +45,16 @@ The proper usage of this crate is to:
 This is your [`tower::Service`] that converts `Request`s into `Response`s,
 i.e. the "inner handler".
 
-Said concretely, `RpcHandler` is 3 `tower::Service`s where the request/response types are
-the 3 endpoint enums from [`cuprate_rpc_types`] and the error type is from this crate:
+Said concretely, `RpcHandler` is 3 `tower::Service`s where the
+request/response types are the 3 endpoint enums from [`cuprate_rpc_types`]:
 - [`JsonRpcRequest`](cuprate_rpc_types::json::JsonRpcRequest) & [`JsonRpcResponse`](cuprate_rpc_types::json::JsonRpcResponse)
 - [`BinRequest`](cuprate_rpc_types::bin::BinRequest) & [`BinResponse`](cuprate_rpc_types::bin::BinRequest)
 - [`OtherRequest`](cuprate_rpc_types::other::OtherRequest) & [`OtherResponse`](cuprate_rpc_types::other::OtherRequest)
-- [`RpcError`]
 
 `RpcHandler`'s [`Future`](std::future::Future) is generic, _although_,
-it must output `Result<$RESPONSE, RpcError>`.
+it must output `Result<$RESPONSE, anyhow::Error>`.
+
+The error type must always be [`anyhow::Error`].
 
 The `RpcHandler` must also hold some state that is required
 for RPC server operation.
diff --git a/rpc/interface/src/lib.rs b/rpc/interface/src/lib.rs
index ebea4939..1f84738e 100644
--- a/rpc/interface/src/lib.rs
+++ b/rpc/interface/src/lib.rs
@@ -3,14 +3,12 @@
 
 mod route;
 mod router_builder;
-mod rpc_error;
 mod rpc_handler;
 #[cfg(feature = "dummy")]
 mod rpc_handler_dummy;
 mod rpc_service;
 
 pub use router_builder::RouterBuilder;
-pub use rpc_error::RpcError;
 pub use rpc_handler::RpcHandler;
 #[cfg(feature = "dummy")]
 pub use rpc_handler_dummy::RpcHandlerDummy;
diff --git a/rpc/interface/src/rpc_error.rs b/rpc/interface/src/rpc_error.rs
deleted file mode 100644
index 59f371ab..00000000
--- a/rpc/interface/src/rpc_error.rs
+++ /dev/null
@@ -1,53 +0,0 @@
-//! RPC errors.
-
-//---------------------------------------------------------------------------------------------------- Import
-use axum::http::StatusCode;
-
-use cuprate_database::RuntimeError;
-
-//---------------------------------------------------------------------------------------------------- RpcError
-/// Possible errors during RPC operation.
-///
-/// These are any errors that can happen _during_ a handler function.
-/// I.e. if this error surfaces, it happened _after_ the request was
-/// deserialized.
-///
-/// This is the `Error` type required to be used in an [`RpcHandler`](crate::RpcHandler).
-///
-/// TODO: This is empty as possible errors will be
-/// enumerated when the handler functions are created.
-#[derive(Debug, thiserror::Error)]
-pub enum RpcError {
-    /// A [`std::io::Error`] from the database.
-    #[error("database I/O error: {0}")]
-    DatabaseIo(#[from] std::io::Error),
-
-    /// A (non-I/O related) database error.
-    #[error("database error: {0}")]
-    DatabaseError(RuntimeError),
-}
-
-impl From<RpcError> for StatusCode {
-    fn from(_: RpcError) -> Self {
-        // TODO
-        Self::INTERNAL_SERVER_ERROR
-    }
-}
-
-impl From<RuntimeError> for RpcError {
-    fn from(error: RuntimeError) -> Self {
-        match error {
-            RuntimeError::Io(io) => Self::DatabaseIo(io),
-            RuntimeError::KeyExists
-            | RuntimeError::KeyNotFound
-            | RuntimeError::ResizeNeeded
-            | RuntimeError::TableNotFound => Self::DatabaseError(error),
-        }
-    }
-}
-
-//---------------------------------------------------------------------------------------------------- Tests
-#[cfg(test)]
-mod test {
-    // use super::*;
-}
diff --git a/rpc/interface/src/rpc_handler.rs b/rpc/interface/src/rpc_handler.rs
index 1299ec48..1d2676c7 100644
--- a/rpc/interface/src/rpc_handler.rs
+++ b/rpc/interface/src/rpc_handler.rs
@@ -22,7 +22,7 @@ use crate::RpcService;
 /// In other words, an [`RpcHandler`] is a type that implements [`tower::Service`] 3 times,
 /// one for each request/response enum type found in [`cuprate_rpc_types`].
 ///
-/// The error type must always be [`RpcError`](crate::RpcError).
+/// The error type must always be [`anyhow::Error`].
 ///
 /// See this crate's `RpcHandlerDummy` for an implementation example of this trait.
 ///
diff --git a/rpc/interface/src/rpc_service.rs b/rpc/interface/src/rpc_service.rs
index b85ac047..285d60ba 100644
--- a/rpc/interface/src/rpc_service.rs
+++ b/rpc/interface/src/rpc_service.rs
@@ -5,8 +5,6 @@ use std::future::Future;
 
 use tower::Service;
 
-use crate::rpc_error::RpcError;
-
 //---------------------------------------------------------------------------------------------------- RpcService
 /// An RPC [`tower::Service`].
 ///
@@ -17,7 +15,7 @@ use crate::rpc_error::RpcError;
 /// The `Request` and `Response` are generic and
 /// are used in the [`tower::Service`] bounds.
 ///
-/// The error type is always [`RpcError`].
+/// The error type is always [`anyhow::Error`].
 ///
 /// There is a blanket implementation that implements this
 /// trait on types that implement `tower::Service` correctly.
@@ -31,8 +29,8 @@ pub trait RpcService<Request, Response>:
     + Service<
         Request,
         Response = Response,
-        Error = RpcError,
-        Future: Future<Output = Result<Response, RpcError>> + Send + 'static,
+        Error = anyhow::Error,
+        Future: Future<Output = Result<Response, anyhow::Error>> + Send + 'static,
     >
 {
 }
@@ -45,8 +43,8 @@ impl<Request, Response, T> RpcService<Request, Response> for T where
         + Service<
             Request,
             Response = Response,
-            Error = RpcError,
-            Future: Future<Output = Result<Response, RpcError>> + Send + 'static,
+            Error = anyhow::Error,
+            Future: Future<Output = Result<Response, anyhow::Error>> + Send + 'static,
         >
 {
 }

From aac1a31bedffe2e795821935bc345b5060e2a10c Mon Sep 17 00:00:00 2001
From: "hinto.janai" <hinto.janai@protonmail.com>
Date: Fri, 6 Sep 2024 20:09:21 -0400
Subject: [PATCH 2/3] interface: update error

---
 rpc/interface/Cargo.toml               |  1 -
 rpc/interface/src/route/bin.rs         | 19 +++++++++++++++++--
 rpc/interface/src/route/json_rpc.rs    |  4 +++-
 rpc/interface/src/route/other.rs       |  4 +++-
 rpc/interface/src/rpc_handler_dummy.rs | 25 +++++++++++++------------
 5 files changed, 36 insertions(+), 17 deletions(-)

diff --git a/rpc/interface/Cargo.toml b/rpc/interface/Cargo.toml
index feb1affb..42d10554 100644
--- a/rpc/interface/Cargo.toml
+++ b/rpc/interface/Cargo.toml
@@ -22,7 +22,6 @@ anyhow     = { workspace = true }
 axum       = { version = "0.7.5", features = ["json"], default-features = false }
 serde      = { workspace = true, optional = true }
 tower      = { workspace = true }
-thiserror  = { workspace = true }
 paste      = { workspace = true }
 futures    = { workspace = true }
 
diff --git a/rpc/interface/src/route/bin.rs b/rpc/interface/src/route/bin.rs
index 45447caf..90d06c8f 100644
--- a/rpc/interface/src/route/bin.rs
+++ b/rpc/interface/src/route/bin.rs
@@ -5,7 +5,14 @@ use axum::{body::Bytes, extract::State, http::StatusCode};
 use tower::ServiceExt;
 
 use cuprate_epee_encoding::from_bytes;
-use cuprate_rpc_types::bin::{BinRequest, BinResponse, GetTransactionPoolHashesRequest};
+use cuprate_rpc_types::{
+    bin::{
+        BinRequest, BinResponse, GetBlocksByHeightRequest, GetBlocksRequest, GetHashesRequest,
+        GetOutputIndexesRequest, GetOutsRequest, GetTransactionPoolHashesRequest,
+    },
+    json::GetOutputDistributionRequest,
+    RpcCall,
+};
 
 use crate::rpc_handler::RpcHandler;
 
@@ -66,8 +73,16 @@ macro_rules! generate_endpoints_inner {
     ($variant:ident, $handler:ident, $request:expr) => {
         paste::paste! {
             {
+                // Check if restricted.
+                if [<$variant Request>]::IS_RESTRICTED && $handler.restricted() {
+                    // TODO: mimic `monerod` behavior.
+                    return Err(StatusCode::FORBIDDEN);
+                }
+
                 // Send request.
-                let response = $handler.oneshot($request).await?;
+                let Ok(response) = $handler.oneshot($request).await else {
+                    return Err(StatusCode::INTERNAL_SERVER_ERROR);
+                };
 
                 let BinResponse::$variant(response) = response else {
                     panic!("RPC handler returned incorrect response");
diff --git a/rpc/interface/src/route/json_rpc.rs b/rpc/interface/src/route/json_rpc.rs
index bf3d937d..7efb8513 100644
--- a/rpc/interface/src/route/json_rpc.rs
+++ b/rpc/interface/src/route/json_rpc.rs
@@ -50,7 +50,9 @@ pub(crate) async fn json_rpc<H: RpcHandler>(
     }
 
     // Send request.
-    let response = handler.oneshot(request.body).await?;
+    let Ok(response) = handler.oneshot(request.body).await else {
+        return Err(StatusCode::INTERNAL_SERVER_ERROR);
+    };
 
     Ok(Json(Response::ok(id, response)))
 }
diff --git a/rpc/interface/src/route/other.rs b/rpc/interface/src/route/other.rs
index 129ddd59..3ff84487 100644
--- a/rpc/interface/src/route/other.rs
+++ b/rpc/interface/src/route/other.rs
@@ -82,7 +82,9 @@ macro_rules! generate_endpoints_inner {
 
                 // Send request.
                 let request = OtherRequest::$variant($request);
-                let response = $handler.oneshot(request).await?;
+                let Ok(response) = $handler.oneshot(request).await else {
+                    return Err(StatusCode::INTERNAL_SERVER_ERROR);
+                };
 
                 let OtherResponse::$variant(response) = response else {
                     panic!("RPC handler returned incorrect response")
diff --git a/rpc/interface/src/rpc_handler_dummy.rs b/rpc/interface/src/rpc_handler_dummy.rs
index 06fa4608..0b018354 100644
--- a/rpc/interface/src/rpc_handler_dummy.rs
+++ b/rpc/interface/src/rpc_handler_dummy.rs
@@ -3,19 +3,20 @@
 //---------------------------------------------------------------------------------------------------- Use
 use std::task::Poll;
 
-use cuprate_rpc_types::{
-    bin::{BinRequest, BinResponse},
-    json::{JsonRpcRequest, JsonRpcResponse},
-    other::{OtherRequest, OtherResponse},
-};
+use anyhow::Error;
 use futures::channel::oneshot::channel;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 use tower::Service;
 
 use cuprate_helper::asynch::InfallibleOneshotReceiver;
+use cuprate_rpc_types::{
+    bin::{BinRequest, BinResponse},
+    json::{JsonRpcRequest, JsonRpcResponse},
+    other::{OtherRequest, OtherResponse},
+};
 
-use crate::{rpc_error::RpcError, rpc_handler::RpcHandler};
+use crate::rpc_handler::RpcHandler;
 
 //---------------------------------------------------------------------------------------------------- RpcHandlerDummy
 /// An [`RpcHandler`] that always returns [`Default::default`].
@@ -45,8 +46,8 @@ impl RpcHandler for RpcHandlerDummy {
 
 impl Service<JsonRpcRequest> for RpcHandlerDummy {
     type Response = JsonRpcResponse;
-    type Error = RpcError;
-    type Future = InfallibleOneshotReceiver<Result<JsonRpcResponse, RpcError>>;
+    type Error = Error;
+    type Future = InfallibleOneshotReceiver<Result<JsonRpcResponse, Error>>;
 
     fn poll_ready(&mut self, _: &mut std::task::Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
@@ -100,8 +101,8 @@ impl Service<JsonRpcRequest> for RpcHandlerDummy {
 
 impl Service<BinRequest> for RpcHandlerDummy {
     type Response = BinResponse;
-    type Error = RpcError;
-    type Future = InfallibleOneshotReceiver<Result<BinResponse, RpcError>>;
+    type Error = Error;
+    type Future = InfallibleOneshotReceiver<Result<BinResponse, Error>>;
 
     fn poll_ready(&mut self, _: &mut std::task::Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
@@ -130,8 +131,8 @@ impl Service<BinRequest> for RpcHandlerDummy {
 
 impl Service<OtherRequest> for RpcHandlerDummy {
     type Response = OtherResponse;
-    type Error = RpcError;
-    type Future = InfallibleOneshotReceiver<Result<OtherResponse, RpcError>>;
+    type Error = Error;
+    type Future = InfallibleOneshotReceiver<Result<OtherResponse, Error>>;
 
     fn poll_ready(&mut self, _: &mut std::task::Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))

From 6b16fb5688487f56af04c30419c374678cbe9b22 Mon Sep 17 00:00:00 2001
From: "hinto.janai" <hinto.janai@protonmail.com>
Date: Fri, 6 Sep 2024 20:09:42 -0400
Subject: [PATCH 3/3] cuprated: update error type

---
 Cargo.lock                           |  9 +++-
 binaries/cuprated/Cargo.toml         |  1 +
 binaries/cuprated/src/rpc/bin.rs     | 19 +++++----
 binaries/cuprated/src/rpc/handler.rs | 15 ++++---
 binaries/cuprated/src/rpc/json.rs    | 64 ++++++++++++++--------------
 binaries/cuprated/src/rpc/other.rs   | 59 ++++++++++++-------------
 6 files changed, 89 insertions(+), 78 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 3ca5d6af..0bb4612a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -56,6 +56,12 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "038dfcf04a5feb68e9c60b21c9625a54c2c0616e79b72b0fd87075a056ae1d1b"
 
+[[package]]
+name = "anyhow"
+version = "1.0.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10f00e1f6e58a40e807377c75c6a7f97bf9044fab57816f2414e6f5f4499d7b8"
+
 [[package]]
 name = "async-stream"
 version = "0.3.5"
@@ -799,6 +805,7 @@ dependencies = [
 name = "cuprate-rpc-interface"
 version = "0.0.0"
 dependencies = [
+ "anyhow",
  "axum",
  "cuprate-epee-encoding",
  "cuprate-helper",
@@ -809,7 +816,6 @@ dependencies = [
  "paste",
  "serde",
  "serde_json",
- "thiserror",
  "tokio",
  "tower",
  "ureq",
@@ -910,6 +916,7 @@ dependencies = [
 name = "cuprated"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "async-trait",
  "bitflags 2.5.0",
  "borsh",
diff --git a/binaries/cuprated/Cargo.toml b/binaries/cuprated/Cargo.toml
index 63a04317..a886c124 100644
--- a/binaries/cuprated/Cargo.toml
+++ b/binaries/cuprated/Cargo.toml
@@ -35,6 +35,7 @@ cuprate-rpc-interface    = { path = "../../rpc/interface" }
 cuprate-rpc-types        = { path = "../../rpc/types" }
 
 # TODO: after v1.0.0, remove unneeded dependencies.
+anyhow                = { workspace = true }
 async-trait           = { workspace = true }
 bitflags              = { workspace = true }
 borsh                 = { workspace = true }
diff --git a/binaries/cuprated/src/rpc/bin.rs b/binaries/cuprated/src/rpc/bin.rs
index a4bbabbb..60d92c12 100644
--- a/binaries/cuprated/src/rpc/bin.rs
+++ b/binaries/cuprated/src/rpc/bin.rs
@@ -1,4 +1,5 @@
-use cuprate_rpc_interface::RpcError;
+use anyhow::Error;
+
 use cuprate_rpc_types::{
     bin::{
         BinRequest, BinResponse, GetBlocksByHeightRequest, GetBlocksByHeightResponse,
@@ -15,7 +16,7 @@ use crate::rpc::CupratedRpcHandlerState;
 pub(super) async fn map_request(
     state: CupratedRpcHandlerState,
     request: BinRequest,
-) -> Result<BinResponse, RpcError> {
+) -> Result<BinResponse, Error> {
     use BinRequest as Req;
     use BinResponse as Resp;
 
@@ -37,48 +38,48 @@ pub(super) async fn map_request(
 async fn get_blocks(
     state: CupratedRpcHandlerState,
     request: GetBlocksRequest,
-) -> Result<GetBlocksResponse, RpcError> {
+) -> Result<GetBlocksResponse, Error> {
     todo!()
 }
 
 async fn get_blocks_by_height(
     state: CupratedRpcHandlerState,
     request: GetBlocksByHeightRequest,
-) -> Result<GetBlocksByHeightResponse, RpcError> {
+) -> Result<GetBlocksByHeightResponse, Error> {
     todo!()
 }
 
 async fn get_hashes(
     state: CupratedRpcHandlerState,
     request: GetHashesRequest,
-) -> Result<GetHashesResponse, RpcError> {
+) -> Result<GetHashesResponse, Error> {
     todo!()
 }
 
 async fn get_output_indexes(
     state: CupratedRpcHandlerState,
     request: GetOutputIndexesRequest,
-) -> Result<GetOutputIndexesResponse, RpcError> {
+) -> Result<GetOutputIndexesResponse, Error> {
     todo!()
 }
 
 async fn get_outs(
     state: CupratedRpcHandlerState,
     request: GetOutsRequest,
-) -> Result<GetOutsResponse, RpcError> {
+) -> Result<GetOutsResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_hashes(
     state: CupratedRpcHandlerState,
     request: GetTransactionPoolHashesRequest,
-) -> Result<GetTransactionPoolHashesResponse, RpcError> {
+) -> Result<GetTransactionPoolHashesResponse, Error> {
     todo!()
 }
 
 async fn get_output_distribution(
     state: CupratedRpcHandlerState,
     request: GetOutputDistributionRequest,
-) -> Result<GetOutputDistributionResponse, RpcError> {
+) -> Result<GetOutputDistributionResponse, Error> {
     todo!()
 }
diff --git a/binaries/cuprated/src/rpc/handler.rs b/binaries/cuprated/src/rpc/handler.rs
index ab15ff6b..8ba25eab 100644
--- a/binaries/cuprated/src/rpc/handler.rs
+++ b/binaries/cuprated/src/rpc/handler.rs
@@ -2,6 +2,7 @@
 
 use std::task::{Context, Poll};
 
+use anyhow::Error;
 use futures::{channel::oneshot::channel, future::BoxFuture};
 use serde::{Deserialize, Serialize};
 use tower::Service;
@@ -9,7 +10,7 @@ use tower::Service;
 use cuprate_blockchain::service::BlockchainReadHandle;
 use cuprate_helper::asynch::InfallibleOneshotReceiver;
 use cuprate_json_rpc::Id;
-use cuprate_rpc_interface::{RpcError, RpcHandler};
+use cuprate_rpc_interface::RpcHandler;
 use cuprate_rpc_types::{
     bin::{BinRequest, BinResponse},
     json::{JsonRpcRequest, JsonRpcResponse},
@@ -58,8 +59,8 @@ impl RpcHandler for CupratedRpcHandler {
 
 impl Service<JsonRpcRequest> for CupratedRpcHandler {
     type Response = JsonRpcResponse;
-    type Error = RpcError;
-    type Future = BoxFuture<'static, Result<JsonRpcResponse, RpcError>>;
+    type Error = Error;
+    type Future = BoxFuture<'static, Result<JsonRpcResponse, Error>>;
 
     fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
@@ -73,8 +74,8 @@ impl Service<JsonRpcRequest> for CupratedRpcHandler {
 
 impl Service<BinRequest> for CupratedRpcHandler {
     type Response = BinResponse;
-    type Error = RpcError;
-    type Future = BoxFuture<'static, Result<BinResponse, RpcError>>;
+    type Error = Error;
+    type Future = BoxFuture<'static, Result<BinResponse, Error>>;
 
     fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
@@ -88,8 +89,8 @@ impl Service<BinRequest> for CupratedRpcHandler {
 
 impl Service<OtherRequest> for CupratedRpcHandler {
     type Response = OtherResponse;
-    type Error = RpcError;
-    type Future = BoxFuture<'static, Result<OtherResponse, RpcError>>;
+    type Error = Error;
+    type Future = BoxFuture<'static, Result<OtherResponse, Error>>;
 
     fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         Poll::Ready(Ok(()))
diff --git a/binaries/cuprated/src/rpc/json.rs b/binaries/cuprated/src/rpc/json.rs
index ece925e8..41398d48 100644
--- a/binaries/cuprated/src/rpc/json.rs
+++ b/binaries/cuprated/src/rpc/json.rs
@@ -1,8 +1,8 @@
 use std::sync::Arc;
 
+use anyhow::Error;
 use tower::ServiceExt;
 
-use cuprate_rpc_interface::RpcError;
 use cuprate_rpc_types::json::{
     AddAuxPowRequest, AddAuxPowResponse, BannedRequest, BannedResponse, CalcPowRequest,
     CalcPowResponse, FlushCacheRequest, FlushCacheResponse, FlushTransactionPoolRequest,
@@ -29,7 +29,7 @@ use crate::rpc::CupratedRpcHandlerState;
 pub(super) async fn map_request(
     state: CupratedRpcHandlerState,
     request: JsonRpcRequest,
-) -> Result<JsonRpcResponse, RpcError> {
+) -> Result<JsonRpcResponse, Error> {
     use JsonRpcRequest as Req;
     use JsonRpcResponse as Resp;
 
@@ -86,209 +86,209 @@ pub(super) async fn map_request(
 async fn get_block_count(
     state: CupratedRpcHandlerState,
     request: GetBlockCountRequest,
-) -> Result<GetBlockCountResponse, RpcError> {
+) -> Result<GetBlockCountResponse, Error> {
     todo!()
 }
 
 async fn on_get_block_hash(
     state: CupratedRpcHandlerState,
     request: OnGetBlockHashRequest,
-) -> Result<OnGetBlockHashResponse, RpcError> {
+) -> Result<OnGetBlockHashResponse, Error> {
     todo!()
 }
 
 async fn submit_block(
     state: CupratedRpcHandlerState,
     request: SubmitBlockRequest,
-) -> Result<SubmitBlockResponse, RpcError> {
+) -> Result<SubmitBlockResponse, Error> {
     todo!()
 }
 
 async fn generate_blocks(
     state: CupratedRpcHandlerState,
     request: GenerateBlocksRequest,
-) -> Result<GenerateBlocksResponse, RpcError> {
+) -> Result<GenerateBlocksResponse, Error> {
     todo!()
 }
 
 async fn get_last_block_header(
     state: CupratedRpcHandlerState,
     request: GetLastBlockHeaderRequest,
-) -> Result<GetLastBlockHeaderResponse, RpcError> {
+) -> Result<GetLastBlockHeaderResponse, Error> {
     todo!()
 }
 
 async fn get_block_header_by_hash(
     state: CupratedRpcHandlerState,
     request: GetBlockHeaderByHashRequest,
-) -> Result<GetBlockHeaderByHashResponse, RpcError> {
+) -> Result<GetBlockHeaderByHashResponse, Error> {
     todo!()
 }
 
 async fn get_block_header_by_height(
     state: CupratedRpcHandlerState,
     request: GetBlockHeaderByHeightRequest,
-) -> Result<GetBlockHeaderByHeightResponse, RpcError> {
+) -> Result<GetBlockHeaderByHeightResponse, Error> {
     todo!()
 }
 
 async fn get_block_headers_range(
     state: CupratedRpcHandlerState,
     request: GetBlockHeadersRangeRequest,
-) -> Result<GetBlockHeadersRangeResponse, RpcError> {
+) -> Result<GetBlockHeadersRangeResponse, Error> {
     todo!()
 }
 
 async fn get_block(
     state: CupratedRpcHandlerState,
     request: GetBlockRequest,
-) -> Result<GetBlockResponse, RpcError> {
+) -> Result<GetBlockResponse, Error> {
     todo!()
 }
 
 async fn get_connections(
     state: CupratedRpcHandlerState,
     request: GetConnectionsRequest,
-) -> Result<GetConnectionsResponse, RpcError> {
+) -> Result<GetConnectionsResponse, Error> {
     todo!()
 }
 
 async fn get_info(
     state: CupratedRpcHandlerState,
     request: GetInfoRequest,
-) -> Result<GetInfoResponse, RpcError> {
+) -> Result<GetInfoResponse, Error> {
     todo!()
 }
 
 async fn hard_fork_info(
     state: CupratedRpcHandlerState,
     request: HardForkInfoRequest,
-) -> Result<HardForkInfoResponse, RpcError> {
+) -> Result<HardForkInfoResponse, Error> {
     todo!()
 }
 
 async fn set_bans(
     state: CupratedRpcHandlerState,
     request: SetBansRequest,
-) -> Result<SetBansResponse, RpcError> {
+) -> Result<SetBansResponse, Error> {
     todo!()
 }
 
 async fn get_bans(
     state: CupratedRpcHandlerState,
     request: GetBansRequest,
-) -> Result<GetBansResponse, RpcError> {
+) -> Result<GetBansResponse, Error> {
     todo!()
 }
 
 async fn banned(
     state: CupratedRpcHandlerState,
     request: BannedRequest,
-) -> Result<BannedResponse, RpcError> {
+) -> Result<BannedResponse, Error> {
     todo!()
 }
 
 async fn flush_transaction_pool(
     state: CupratedRpcHandlerState,
     request: FlushTransactionPoolRequest,
-) -> Result<FlushTransactionPoolResponse, RpcError> {
+) -> Result<FlushTransactionPoolResponse, Error> {
     todo!()
 }
 
 async fn get_output_histogram(
     state: CupratedRpcHandlerState,
     request: GetOutputHistogramRequest,
-) -> Result<GetOutputHistogramResponse, RpcError> {
+) -> Result<GetOutputHistogramResponse, Error> {
     todo!()
 }
 
 async fn get_coinbase_tx_sum(
     state: CupratedRpcHandlerState,
     request: GetCoinbaseTxSumRequest,
-) -> Result<GetCoinbaseTxSumResponse, RpcError> {
+) -> Result<GetCoinbaseTxSumResponse, Error> {
     todo!()
 }
 
 async fn get_version(
     state: CupratedRpcHandlerState,
     request: GetVersionRequest,
-) -> Result<GetVersionResponse, RpcError> {
+) -> Result<GetVersionResponse, Error> {
     todo!()
 }
 
 async fn get_fee_estimate(
     state: CupratedRpcHandlerState,
     request: GetFeeEstimateRequest,
-) -> Result<GetFeeEstimateResponse, RpcError> {
+) -> Result<GetFeeEstimateResponse, Error> {
     todo!()
 }
 
 async fn get_alternate_chains(
     state: CupratedRpcHandlerState,
     request: GetAlternateChainsRequest,
-) -> Result<GetAlternateChainsResponse, RpcError> {
+) -> Result<GetAlternateChainsResponse, Error> {
     todo!()
 }
 
 async fn relay_tx(
     state: CupratedRpcHandlerState,
     request: RelayTxRequest,
-) -> Result<RelayTxResponse, RpcError> {
+) -> Result<RelayTxResponse, Error> {
     todo!()
 }
 
 async fn sync_info(
     state: CupratedRpcHandlerState,
     request: SyncInfoRequest,
-) -> Result<SyncInfoResponse, RpcError> {
+) -> Result<SyncInfoResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_backlog(
     state: CupratedRpcHandlerState,
     request: GetTransactionPoolBacklogRequest,
-) -> Result<GetTransactionPoolBacklogResponse, RpcError> {
+) -> Result<GetTransactionPoolBacklogResponse, Error> {
     todo!()
 }
 
 async fn get_miner_data(
     state: CupratedRpcHandlerState,
     request: GetMinerDataRequest,
-) -> Result<GetMinerDataResponse, RpcError> {
+) -> Result<GetMinerDataResponse, Error> {
     todo!()
 }
 
 async fn prune_blockchain(
     state: CupratedRpcHandlerState,
     request: PruneBlockchainRequest,
-) -> Result<PruneBlockchainResponse, RpcError> {
+) -> Result<PruneBlockchainResponse, Error> {
     todo!()
 }
 
 async fn calc_pow(
     state: CupratedRpcHandlerState,
     request: CalcPowRequest,
-) -> Result<CalcPowResponse, RpcError> {
+) -> Result<CalcPowResponse, Error> {
     todo!()
 }
 
 async fn flush_cache(
     state: CupratedRpcHandlerState,
     request: FlushCacheRequest,
-) -> Result<FlushCacheResponse, RpcError> {
+) -> Result<FlushCacheResponse, Error> {
     todo!()
 }
 
 async fn add_aux_pow(
     state: CupratedRpcHandlerState,
     request: AddAuxPowRequest,
-) -> Result<AddAuxPowResponse, RpcError> {
+) -> Result<AddAuxPowResponse, Error> {
     todo!()
 }
 
 async fn get_tx_ids_loose(
     state: CupratedRpcHandlerState,
     request: GetTxIdsLooseRequest,
-) -> Result<GetTxIdsLooseResponse, RpcError> {
+) -> Result<GetTxIdsLooseResponse, Error> {
     todo!()
 }
diff --git a/binaries/cuprated/src/rpc/other.rs b/binaries/cuprated/src/rpc/other.rs
index b23ebdf9..c0df3993 100644
--- a/binaries/cuprated/src/rpc/other.rs
+++ b/binaries/cuprated/src/rpc/other.rs
@@ -1,4 +1,5 @@
-use cuprate_rpc_interface::RpcError;
+use anyhow::Error;
+
 use cuprate_rpc_types::other::{
     GetAltBlocksHashesRequest, GetAltBlocksHashesResponse, GetHeightRequest, GetHeightResponse,
     GetLimitRequest, GetLimitResponse, GetNetStatsRequest, GetNetStatsResponse, GetOutsRequest,
@@ -22,7 +23,7 @@ use crate::rpc::CupratedRpcHandlerState;
 pub(super) async fn map_request(
     state: CupratedRpcHandlerState,
     request: OtherRequest,
-) -> Result<OtherResponse, RpcError> {
+) -> Result<OtherResponse, Error> {
     use OtherRequest as Req;
     use OtherResponse as Resp;
 
@@ -72,188 +73,188 @@ pub(super) async fn map_request(
 async fn get_height(
     state: CupratedRpcHandlerState,
     request: GetHeightRequest,
-) -> Result<GetHeightResponse, RpcError> {
+) -> Result<GetHeightResponse, Error> {
     todo!()
 }
 
 async fn get_transactions(
     state: CupratedRpcHandlerState,
     request: GetTransactionsRequest,
-) -> Result<GetTransactionsResponse, RpcError> {
+) -> Result<GetTransactionsResponse, Error> {
     todo!()
 }
 
 async fn get_alt_blocks_hashes(
     state: CupratedRpcHandlerState,
     request: GetAltBlocksHashesRequest,
-) -> Result<GetAltBlocksHashesResponse, RpcError> {
+) -> Result<GetAltBlocksHashesResponse, Error> {
     todo!()
 }
 
 async fn is_key_image_spent(
     state: CupratedRpcHandlerState,
     request: IsKeyImageSpentRequest,
-) -> Result<IsKeyImageSpentResponse, RpcError> {
+) -> Result<IsKeyImageSpentResponse, Error> {
     todo!()
 }
 
 async fn send_raw_transaction(
     state: CupratedRpcHandlerState,
     request: SendRawTransactionRequest,
-) -> Result<SendRawTransactionResponse, RpcError> {
+) -> Result<SendRawTransactionResponse, Error> {
     todo!()
 }
 
 async fn start_mining(
     state: CupratedRpcHandlerState,
     request: StartMiningRequest,
-) -> Result<StartMiningResponse, RpcError> {
+) -> Result<StartMiningResponse, Error> {
     todo!()
 }
 
 async fn stop_mining(
     state: CupratedRpcHandlerState,
     request: StopMiningRequest,
-) -> Result<StopMiningResponse, RpcError> {
+) -> Result<StopMiningResponse, Error> {
     todo!()
 }
 
 async fn mining_status(
     state: CupratedRpcHandlerState,
     request: MiningStatusRequest,
-) -> Result<MiningStatusResponse, RpcError> {
+) -> Result<MiningStatusResponse, Error> {
     todo!()
 }
 
 async fn save_bc(
     state: CupratedRpcHandlerState,
     request: SaveBcRequest,
-) -> Result<SaveBcResponse, RpcError> {
+) -> Result<SaveBcResponse, Error> {
     todo!()
 }
 
 async fn get_peer_list(
     state: CupratedRpcHandlerState,
     request: GetPeerListRequest,
-) -> Result<GetPeerListResponse, RpcError> {
+) -> Result<GetPeerListResponse, Error> {
     todo!()
 }
 
 async fn set_log_hash_rate(
     state: CupratedRpcHandlerState,
     request: SetLogHashRateRequest,
-) -> Result<SetLogHashRateResponse, RpcError> {
+) -> Result<SetLogHashRateResponse, Error> {
     todo!()
 }
 
 async fn set_log_level(
     state: CupratedRpcHandlerState,
     request: SetLogLevelRequest,
-) -> Result<SetLogLevelResponse, RpcError> {
+) -> Result<SetLogLevelResponse, Error> {
     todo!()
 }
 
 async fn set_log_categories(
     state: CupratedRpcHandlerState,
     request: SetLogCategoriesRequest,
-) -> Result<SetLogCategoriesResponse, RpcError> {
+) -> Result<SetLogCategoriesResponse, Error> {
     todo!()
 }
 
 async fn set_bootstrap_daemon(
     state: CupratedRpcHandlerState,
     request: SetBootstrapDaemonRequest,
-) -> Result<SetBootstrapDaemonResponse, RpcError> {
+) -> Result<SetBootstrapDaemonResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool(
     state: CupratedRpcHandlerState,
     request: GetTransactionPoolRequest,
-) -> Result<GetTransactionPoolResponse, RpcError> {
+) -> Result<GetTransactionPoolResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_stats(
     state: CupratedRpcHandlerState,
     request: GetTransactionPoolStatsRequest,
-) -> Result<GetTransactionPoolStatsResponse, RpcError> {
+) -> Result<GetTransactionPoolStatsResponse, Error> {
     todo!()
 }
 
 async fn stop_daemon(
     state: CupratedRpcHandlerState,
     request: StopDaemonRequest,
-) -> Result<StopDaemonResponse, RpcError> {
+) -> Result<StopDaemonResponse, Error> {
     todo!()
 }
 
 async fn get_limit(
     state: CupratedRpcHandlerState,
     request: GetLimitRequest,
-) -> Result<GetLimitResponse, RpcError> {
+) -> Result<GetLimitResponse, Error> {
     todo!()
 }
 
 async fn set_limit(
     state: CupratedRpcHandlerState,
     request: SetLimitRequest,
-) -> Result<SetLimitResponse, RpcError> {
+) -> Result<SetLimitResponse, Error> {
     todo!()
 }
 
 async fn out_peers(
     state: CupratedRpcHandlerState,
     request: OutPeersRequest,
-) -> Result<OutPeersResponse, RpcError> {
+) -> Result<OutPeersResponse, Error> {
     todo!()
 }
 
 async fn in_peers(
     state: CupratedRpcHandlerState,
     request: InPeersRequest,
-) -> Result<InPeersResponse, RpcError> {
+) -> Result<InPeersResponse, Error> {
     todo!()
 }
 
 async fn get_net_stats(
     state: CupratedRpcHandlerState,
     request: GetNetStatsRequest,
-) -> Result<GetNetStatsResponse, RpcError> {
+) -> Result<GetNetStatsResponse, Error> {
     todo!()
 }
 
 async fn get_outs(
     state: CupratedRpcHandlerState,
     request: GetOutsRequest,
-) -> Result<GetOutsResponse, RpcError> {
+) -> Result<GetOutsResponse, Error> {
     todo!()
 }
 
 async fn update(
     state: CupratedRpcHandlerState,
     request: UpdateRequest,
-) -> Result<UpdateResponse, RpcError> {
+) -> Result<UpdateResponse, Error> {
     todo!()
 }
 
 async fn pop_blocks(
     state: CupratedRpcHandlerState,
     request: PopBlocksRequest,
-) -> Result<PopBlocksResponse, RpcError> {
+) -> Result<PopBlocksResponse, Error> {
     todo!()
 }
 
 async fn get_transaction_pool_hashes(
     state: CupratedRpcHandlerState,
     request: GetTransactionPoolHashesRequest,
-) -> Result<GetTransactionPoolHashesResponse, RpcError> {
+) -> Result<GetTransactionPoolHashesResponse, Error> {
     todo!()
 }
 
 async fn get_public_nodes(
     state: CupratedRpcHandlerState,
     request: GetPublicNodesRequest,
-) -> Result<GetPublicNodesResponse, RpcError> {
+) -> Result<GetPublicNodesResponse, Error> {
     todo!()
 }