{"record":{"id":"90ade20582996b09","repo":"nautechsystems/nautilus_trader","slug":"failed-to-sign-transaction-e","errorCode":null,"errorMessage":"Failed to sign transaction: {e}","messagePattern":"Failed to sign transaction: (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/adapters/dydx/src/execution/wallet.rs","lineNumber":185,"sourceCode":"            .finish()\n    }\n}\n\nimpl Account {\n    /// Get the public key associated with this account.\n    #[must_use]\n    pub fn public_key(&self) -> PublicKey {\n        self.key.public_key()\n    }\n\n    /// Sign a [`SignDoc`](tx::SignDoc) with the private key.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if signing fails.\n    pub fn sign(&self, doc: tx::SignDoc) -> Result<tx::Raw, anyhow::Error> {\n        doc.sign(&self.key)\n            .map_err(|e| anyhow::anyhow!(\"Failed to sign transaction: {e}\"))\n    }\n\n    /// Update account and sequence numbers from on-chain data.\n    pub fn set_account_info(&mut self, account_number: u64, sequence_number: u64) {\n        self.account_number = account_number;\n        self.sequence_number = sequence_number;\n    }\n\n    /// Increment the sequence number (used after successful transaction broadcast).\n    pub fn increment_sequence(&mut self) {\n        self.sequence_number += 1;\n    }\n\n    /// Derive a subaccount for this account.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if the subaccount number is invalid.","sourceCodeStart":167,"sourceCodeEnd":203,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/dydx/src/execution/wallet.rs#L167-L203","documentation":"DydxWallet::sign wraps cosmrs tx::SignDoc::sign, which produces the ECDSA/secp256k1 signature over the transaction SignDoc. Any failure inside the signing key operation (malformed doc encoding, key state issue) is surfaced as this error.","triggerScenarios":"Calling build_transaction (which calls sign) when doc.sign(&self.key) returns Err — typically because the SignDoc was constructed with an account_number/sequence that does not match chain state, or an internal k256 signing failure.","commonSituations":"Stale account_number/sequence passed to set_account_info before building the tx causing SignDoc mismatch; a wallet whose key was reconstructed incorrectly; cosmrs version incompatibility producing a doc the signer rejects.","solutions":["Refresh account_number and sequence from the chain (via the node's auth/abci_query endpoint) and call set_account_info before signing.","Re-create the wallet with DydxWallet::from_private_key to guarantee a valid signing key.","Check the cosmrs version matches what the adapter expects and rebuild the SignDoc with its current API.","Inspect the inner error message ({e}) for the concrete k256/cosmrs cause and fix accordingly."],"exampleFix":"// before: signing with stale sequence\n// let raw = wallet.sign(doc)?;\n// after: refresh chain state first\nwallet.set_account_info(account_number, fresh_sequence);\nlet raw = wallet.sign(doc)?;","handlingStrategy":"try-catch","validationCode":"// refresh chain state before signing\nwallet.set_account_info(fetch_account_number()?, fetch_sequence()?);","typeGuard":null,"tryCatchPattern":"let raw = match wallet.sign(doc) {\n    Ok(r) => r,\n    Err(e) => {\n        // refresh account/sequence from node and retry once\n        wallet.set_account_info(acc_num, seq);\n        wallet.sign(doc)?\n    }\n};","preventionTips":["Always sync account_number and sequence from chain before building/signing","Keep cosmrs version consistent across the build","Log inner error ({e}) to identify the concrete k256/cosmrs cause"],"tags":["dydx","crypto","signing","transaction","cosmos"],"backgroundTag":"invalid-argument-value","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"}