using enum to represent json rpc error codes

Author: zees-dev

crates/blockless-drivers/src/handlers/http.rs

@@ -3,7 +3,7 @@ use serde::{Deserialize, Serialize};
 use std::{collections::HashMap, str::FromStr, time::Duration};
 
 // Import RPC types from parent module
-use crate::wasi::rpc::{JsonRpcError, JsonRpcResponse, RPC_VERSION};
+use crate::wasi::rpc::{JsonRpcError, JsonRpcErrorCode, JsonRpcResponse, RPC_VERSION};
 
 // HTTP request structures matching the SDK
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -93,7 +93,7 @@ pub async fn handle_http_request(params: Option<serde_json::Value>, id: u32) ->
                 jsonrpc: RPC_VERSION.to_string(),
                 result: None,
                 error: Some(JsonRpcError {
-                    code: -32602,
+                    code: JsonRpcErrorCode::InvalidParams as i32,
                     message: "Invalid params".to_string(),
                     data: Some(serde_json::json!({
                         "error": "Missing HTTP request parameters"
@@ -115,7 +115,7 @@ pub async fn handle_http_request(params: Option<serde_json::Value>, id: u32) ->
                     jsonrpc: RPC_VERSION.to_string(),
                     result: None,
                     error: Some(JsonRpcError {
-                        code: -32603,
+                        code: JsonRpcErrorCode::InternalError as i32,
                         message: "Internal error".to_string(),
                         data: Some(serde_json::json!({
                             "error": format!("Failed to serialize result: {}", e)

crates/blockless-drivers/src/wasi/rpc.rs

@@ -39,6 +39,17 @@ pub struct JsonRpcError {
     pub data: Option<serde_json::Value>,
 }
 
+// https://www.jsonrpc.org/specification#error_object
+#[derive(Debug, Clone, Copy)]
+#[repr(i32)]
+pub enum JsonRpcErrorCode {
+    ParseError = -32700,
+    InvalidRequest = -32600,
+    MethodNotFound = -32601,
+    InvalidParams = -32602,
+    InternalError = -32603,
+}
+
 impl types::UserErrorConversion for WasiCtx {
     fn blockless_rpc_error_from_blockless_rpc_error_kind(
         &mut self,
@@ -143,7 +154,7 @@ async fn handle_rpc_request(request: JsonRpcRequest) -> JsonRpcResponse {
             jsonrpc: RPC_VERSION.to_string(),
             result: None,
             error: Some(JsonRpcError {
-                code: -32601,
+                code: JsonRpcErrorCode::MethodNotFound as i32,
                 message: "Method not found".to_string(),
                 data: Some(serde_json::json!({
                     "method": request.method