{"record":{"id":"a7898f68ef11c04e","repo":"nautechsystems/nautilus_trader","slug":"signed-transaction-payload-is-bytes-exceeding","errorCode":null,"errorMessage":"Signed transaction payload is {} bytes, exceeding the {} byte limit","messagePattern":"Signed transaction payload is (.+?) bytes, exceeding the (.+?) byte limit","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/adapters/blockchain/src/execution/sealing.rs","lineNumber":161,"sourceCode":"        &self.active_id\n    }\n\n    #[must_use]\n    pub(crate) fn deployment_id(&self) -> &str {\n        &self.deployment_id\n    }\n\n    #[must_use]\n    pub(crate) fn contains_key(&self, id: &[u8; KEY_ID_LEN]) -> bool {\n        self.keys.contains_key(id)\n    }\n\n    pub(crate) fn seal(\n        &self,\n        plaintext: &[u8],\n        context: &PayloadContext,\n    ) -> anyhow::Result<Vec<u8>> {\n        anyhow::ensure!(\n            plaintext.len() <= MAX_SIGNED_TRANSACTION_BYTES,\n            \"Signed transaction payload is {} bytes, exceeding the {} byte limit\",\n            plaintext.len(),\n            MAX_SIGNED_TRANSACTION_BYTES\n        );\n        validate_context(context, &self.deployment_id)?;\n\n        let key = self\n            .keys\n            .get(&self.active_id)\n            .expect(\"active payload key missing from key set\");\n        let aad = encode_aad(&self.active_id, context)?;\n        let mut ciphertext = plaintext.to_vec();\n        let nonce = key\n            .seal_in_place_append_tag(Aad::from(aad), &mut ciphertext)\n            .map_err(|_| anyhow::anyhow!(\"Failed to seal signed transaction payload\"))?;\n\n        let mut envelope = Vec::with_capacity(ENVELOPE_HEADER_LEN + ciphertext.len());","sourceCodeStart":143,"sourceCodeEnd":179,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/blockchain/src/execution/sealing.rs#L143-L179","documentation":"Thrown in `seal` before encrypting, this error rejects plaintext payloads whose byte length exceeds `MAX_SIGNED_TRANSACTION_BYTES`. The library enforces a hard size ceiling on signed transaction payloads so sealed envelopes and storage stay within bounded limits.","triggerScenarios":"Calling `seal` (directly or via `migrate_execution_payload_batch` / `rewrap_execution_payload_batch`) with a plaintext larger than the configured maximum byte limit.","commonSituations":"Batches of transactions aggregated into one payload that grew past the limit, misconfigured limit values, or accidentally passing an entire batch file instead of a single payload.","solutions":["Split or truncate the payload so each sealed transaction payload is under `MAX_SIGNED_TRANSACTION_BYTES`","Reduce batch size in `migrate_execution_payload_batch` / `rewrap_execution_payload_batch` calls","Check the plaintext for accidental duplication or oversized attachments before sealing"],"exampleFix":"// before\nlet sealed = sealer.seal(&entire_batch, &ctx)?;\n// after\nfor payload in batch.chunks(MAX_SIGNED_TRANSACTION_BYTES_SLICE_COUNT) {\n    let sealed = sealer.seal(payload, &ctx)?;\n}","handlingStrategy":"validation","validationCode":"if plaintext.len() > MAX_SIGNED_TRANSACTION_BYTES {\n    return Err(anyhow!(\"payload too large: {} bytes\", plaintext.len()));\n}","typeGuard":null,"tryCatchPattern":"match sealer.seal(&plaintext, &ctx) {\n    Ok(sealed) => /* ... */,\n    Err(e) if e.to_string().contains(\"byte limit\") => split_or_reduce_batch(),\n    Err(e) => return Err(e),\n}","preventionTips":["Check plaintext size against MAX_SIGNED_TRANSACTION_BYTES before sealing","Keep batches small enough that each payload stays under the limit","Add a size assertion in tests for the largest realistic transaction payload"],"tags":["validation","size-limit","payload"],"backgroundTag":"payload-too-large","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}