{"record":{"id":"35d452b502aacfdf","repo":"nautechsystems/nautilus_trader","slug":"method-rpc-error","errorCode":null,"errorMessage":"{method} RPC error {}","messagePattern":"(.+?) RPC error (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/adapters/blockchain/src/rpc/http.rs","lineNumber":346,"sourceCode":"                BlockchainRpcClientError::ClientError(message)\n                    if message.contains(\"redirect response rejected\") =>\n                {\n                    anyhow::anyhow!(\"{method} redirect rejected\")\n                }\n                _ => anyhow::anyhow!(\"{method} request failed\"),\n            })?;\n\n        let parsed = serde_json::from_slice::<RpcNodeHttpResponse<T>>(bytes.as_ref())\n            .map_err(|_| anyhow::anyhow!(\"Failed to parse {method} response\"))?;\n\n        if parsed.jsonrpc.is_none()\n            && let (Some(code), Some(_message)) = (parsed.code, parsed.message)\n        {\n            anyhow::bail!(\"{method} RPC error {code}\");\n        }\n\n        if let Some(error) = parsed.error {\n            anyhow::bail!(\"{method} RPC error {}\", error.code);\n        }\n\n        Ok(parsed.result)\n    }\n\n    /// Returns the chain ID reported by the RPC node via `eth_chainId`.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if the RPC call fails or the result is missing or malformed.\n    pub async fn chain_id(&self) -> anyhow::Result<u64> {\n        let result: Option<String> = self\n            .execute_execution_rpc_call(\"eth_chainId\", serde_json::json!([]))\n            .await?;\n        parse_hex_quantity_result(\"eth_chainId\", result)\n            .and_then(|v| u64::try_from(v).map_err(Into::into))\n    }\n","sourceCodeStart":328,"sourceCodeEnd":364,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/blockchain/src/rpc/http.rs#L328-L364","documentation":"A typed execution RPC call (`chain_id`, `get_storage_at`, `get_code_with_block`, `get_transaction_count_*`) received a standard JSON-RPC error object from the node. The message includes the method name and the JSON-RPC error code but discards the node's `message` detail, so consult the code (-32601 unsupported method, -32602 invalid params, -32000/-32005 server/limit errors). The node received and rejected the request at protocol level.","triggerScenarios":"`execute_execution_rpc_call` gets a response with a populated `error` field for any of the wrapper methods: e.g. `eth_getStorageAt` with a malformed slot hex, `eth_getCode` at an unsupported block tag on a pruned node, or `eth_chainId` on an endpoint that doesn't expose it.","commonSituations":"Pruned/light nodes rejecting historical block queries; invalid storage-slot or address hex in params; endpoints that don't support certain methods (some L2/gateway RPCs); node returning -32005 limit exceeded under load.","solutions":["Decode the error code: fix params for -32602, switch endpoints for -32601, back off for -32005","Validate all hex params (address length, 32-byte storage slot with 0x prefix) before the call","For historical block queries, use an archive node instead of a pruned full node","Retry only transient codes with backoff; add a fallback RPC endpoint for hard failures"],"exampleFix":"// before: unvalidated storage slot\nlet slot = format!(\"{}\", index); // decimal, not 0x-hex32\nlet v = rpc.get_storage_at(contract, slot, block).await?;\n// after\nlet slot = format!(\"0x{:064x}\", index);\nlet v = rpc.get_storage_at(contract, slot, block).await?;","handlingStrategy":"validation","validationCode":"fn valid_slot(slot: &str) -> bool { slot.starts_with(\"0x\") && slot.len() <= 66 && slot[2..].chars().all(|c| c.is_ascii_hexdigit()) }\n// format slots as 0x{:064x}, addresses as 0x + 40 hex chars","typeGuard":null,"tryCatchPattern":"match typed_call().await {\n    Err(e) if e.to_string().contains(\"RPC error -32602\") => fix_params_and_retry(),\n    Err(e) if e.to_string().contains(\"RPC error -32601\") => use_alternate_endpoint(),\n    Err(e) => Err(e),\n    Ok(v) => Ok(v),\n}","preventionTips":["Encode hex params correctly (0x-prefixed, fixed-width for slots)","Use archive nodes for historical block queries; pruned nodes reject them","Match method availability to endpoint type before calling; classify error codes for retry vs hard failure"],"tags":["rpc","json-rpc","node-error","ethereum"],"backgroundTag":"api-error-response","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}