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Bitcoin Blockchain Error: Invalid Schnorr Signature in Broadcast RPC
The Bitcoin blockchain has been experiencing issues with the Broadcast RPC, a critical function that allows nodes to broadcast raw transactions to the network. A recent error message from the Bitcoin Core client indicates an issue with the Schnorr signature verification process.
Error Details
The error message provided by the Bitcoin Core client states:
Broadcast error: {"code":-26,"message": "non-mandatory-script-verify-flag (invalid Schnorr signature)"}
This code indicates that an invalid Schnorr signature is being used in the broadcast process. The message field specifies the cause of the error as “non-mandatory-script-verify-flag”.
Schnorr Signature Overview
For those unfamiliar with the Schnorr signature scheme, it is a secure digital signature scheme developed by Nick Wise and Simon De Courcey. It uses a compact public key representation to represent private keys.
In Bitcoin, the Schnorr signature scheme is used for payment scripting, allowing nodes to verify transactions without having to store the entire blockchain history. However, this process relies on the script-verify flag being set on the transaction, and validating that flag during transmission can lead to errors if not implemented correctly.
Error Causes
The error message suggests a problem with the non-mandatory-script-verify-flag flag. This flag is used by nodes to verify that the script associated with a transaction has been executed. If this flag is set but the Schnorr signature is invalid, it can lead to errors during transmission.
In most cases, this type of error would be resolved if the node could fix the signature or re-run the transaction from a previous block where validation was successful. However, in some cases, an incorrect or outdated client implementation can cause this type of error.
Solution
To resolve the issue, you can try the following:
- Check your transaction history – Make sure you have not run any transactions from a recent block that may still be set with the
non-mandatory-script-verify-flag. Try re-running these transactions and verifying their signatures before transmitting them.
- Update client configuration – Check if there are any updates available to fix known issues or bugs in the Bitcoin Core client implementation.
Conclusion
The Bitcoin Core client error message indicates a problem with the Schnorr signature verification process during transmission. To resolve this issue, it is essential to identify and fix the underlying cause of the error, which may involve reviewing your transaction history, updating client settings, or seeking help from the Bitcoin community.
By understanding the root cause of the error and implementing fixes, you can ensure a smoother experience with Broadcast RPC and the overall functionality of the Bitcoin blockchain.