{"record":{"id":"a73463b61869bf7d","repo":"nautechsystems/nautilus_trader","slug":"failed-to-seal-signed-transaction-payload","errorCode":null,"errorMessage":"Failed to seal signed transaction payload","messagePattern":"Failed to seal signed transaction payload","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"crates/adapters/blockchain/src/execution/sealing.rs","lineNumber":177,"sourceCode":"        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());\n        envelope.push(ENVELOPE_VERSION);\n        envelope.extend_from_slice(&self.active_id);\n        envelope.extend_from_slice(nonce.as_ref());\n        envelope.extend_from_slice(&ciphertext);\n        Ok(envelope)\n    }\n\n    pub(crate) fn unseal(\n        &self,\n        envelope: &[u8],\n        context: &PayloadContext,\n    ) -> anyhow::Result<Vec<u8>> {\n        validate_context(context, &self.deployment_id)?;\n        let parsed = parse_envelope(envelope)?;\n        let key = self.keys.get(&parsed.key_id).ok_or_else(|| {\n            anyhow::anyhow!(","sourceCodeStart":159,"sourceCodeEnd":195,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/blockchain/src/execution/sealing.rs#L159-L195","documentation":"This error wraps an AES-GCM sealing failure from the Ring `SealingKey` when encrypting the signed transaction payload with the active key and AAD. Ring returns an opaque error on encryption failure; the library converts it into this anyhow error, discarding cryptographic details.","triggerScenarios":"Calling `seal` when the underlying AEAD `seal_in_place_append_tag` operation fails — essentially only on internal crypto-state problems, since payload size and context are validated earlier.","commonSituations":"Corrupted or improperly initialized key material, environment/crypto-backend issues, or a bug in key-set loading that left the active key in an invalid state.","solutions":["Reload or restart the key set so the active key is freshly and correctly initialized","Verify the key bytes for the active environment are the correct length and format (256-bit AEAD key)","Capture logs and if it reproduces across restarts, file an internal-invariant issue — this indicates corrupted crypto state, not caller input"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"let sealed = sealer.seal(&plaintext, &ctx)\n    .context(\"payload sealing failed; check key-set initialization\")?;","preventionTips":["Initialize and verify the key set (round-trip seal/open a test payload) at startup","Keep key material handling in one well-tested module","Alert on any occurrence — sealing failure signals crypto-state corruption, not user error"],"tags":["crypto","aead","encryption"],"backgroundTag":"encryption-operation-failed","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"}