{"record":{"id":"63e2841818001654","repo":"nautechsystems/nautilus_trader","slug":"persisted-signed-transaction-is-not-a-complete-eip","errorCode":null,"errorMessage":"Persisted signed transaction is not a complete EIP-2718 envelope","messagePattern":"Persisted signed transaction is not a complete EIP-2718 envelope","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/adapters/blockchain/src/execution/transaction.rs","lineNumber":201,"sourceCode":"pub(super) struct DecodedSignedTransaction {\n    pub hash: B256,\n    pub signer: Address,\n    pub chain_id: u64,\n    pub nonce: u64,\n    pub to: Address,\n    pub value: U256,\n    pub input: Bytes,\n    pub gas_limit: u64,\n    pub max_fee_per_gas: u128,\n    pub max_priority_fee_per_gas: u128,\n}\n\n/// Decodes and authenticates one complete signed EIP-1559 transaction.\npub(super) fn decode_signed_transaction(\n    raw_transaction: &[u8],\n) -> anyhow::Result<DecodedSignedTransaction> {\n    let envelope = TxEnvelope::decode_2718_exact(raw_transaction).map_err(|_| {\n        anyhow::anyhow!(\"Persisted signed transaction is not a complete EIP-2718 envelope\")\n    })?;\n    let TxEnvelope::Eip1559(signed) = envelope else {\n        anyhow::bail!(\"Persisted signed transaction is not EIP-1559\");\n    };\n    anyhow::ensure!(\n        signed.signature().normalize_s().is_none(),\n        \"Persisted transaction signature is not EIP-2 normalized\"\n    );\n    let signer = signed\n        .signature()\n        .recover_address_from_prehash(&signed.signature_hash())\n        .context(\"failed to recover persisted transaction signer\")?;\n    let hash = *signed.hash();\n    let tx = signed.tx();\n    let TxKind::Call(to) = tx.to else {\n        anyhow::bail!(\"Signed transaction creates a contract instead of calling a destination\");\n    };\n    anyhow::ensure!(","sourceCodeStart":183,"sourceCodeEnd":219,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/blockchain/src/execution/transaction.rs#L183-L219","documentation":"decode_signed_transaction calls TxEnvelope::decode_2718_exact, which requires the raw bytes to be exactly one complete EIP-2718 typed-transaction envelope with no trailing bytes. If RLP decoding fails (malformed bytes, truncation, or trailing garbage), the error is replaced with this message. It guards the persisted (sealed/persisted) transaction record's integrity.","triggerScenarios":"Calling decode_signed_transaction (via validate_signed_transaction, validate_rpc_transaction_matches_payload, or verify_finalized_transaction_identity) with bytes that are not a valid EIP-2718 envelope: truncated RLP, trailing bytes after the envelope, legacy (non-typed) raw tx bytes without an envelope prefix, or corrupt storage.","commonSituations":"Persisted tx blob corrupted by a DB migration; caller passes a legacy 0x02-less signed transaction; hex-decoding produced extra bytes; concatenated transaction blobs.","solutions":["Hex-dump the raw bytes and confirm the EIP-2718 type byte (0x02 for EIP-1559) is present and the RLP length matches the payload length","Re-fetch or re-persist the transaction; if bytes are corrupt the original signed tx must be regenerated","Ensure the caller passes exactly one envelope with no trailing bytes (decode_2718_exact rejects leftovers)","If legacy transactions must be supported, convert/persist them as EIP-1559 envelopes upstream"],"exampleFix":"// before\nvalidate_signed_transaction(&legacy_raw_tx_bytes, &intent)?; // legacy tx, no 0x02 prefix\n// after\nlet envelope_bytes = build_eip1559_envelope(legacy_raw_tx_bytes)?;\nvalidate_signed_transaction(&envelope_bytes, &intent)?;","handlingStrategy":"validation","validationCode":"fn is_plausible_eip2718_envelope(raw: &[u8]) -> bool {\n    matches!(raw.first(), Some(0x01 | 0x02))\n        && raw.len() >= 2\n        && raw.len() <= 131_072 // sanity ceiling before RLP decode\n}","typeGuard":"fn looks_like_eip1559(raw: &[u8]) -> bool {\n    raw.first() == Some(&0x02)\n}","tryCatchPattern":"match validate_signed_transaction(&raw, &intent) {\n    Ok(()) => (),\n    Err(e) if e.to_string().contains(\"complete EIP-2718 envelope\") => {\n        // corrupted or wrong-format persisted bytes; re-fetch or re-persist\n    }\n    Err(e) => return Err(e),\n}","preventionTips":["Persist the exact signed envelope bytes and verify length/RLP round-trip after write","Strip any hex prefix (0x) before decoding raw bytes","Reject trailing bytes at write time by round-tripping decode_2718_exact on persist"],"tags":["blockchain","rlp","ethereum"],"backgroundTag":"invalid-argument-format","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"}