Bitcoin: Unable to open channel. How to handle fundchannel: “ERROR channel sent ***: funding failed due to internal error”?

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Error Message Analysis and Troubleshooting on the Bitcoin Network

Bitcoin, like any other cryptocurrency network, relies on a complex system of nodes to validate transactions and manage the flow of funds. However, when trying to connect to a Lightning Network node, users may encounter an error message that says “ERROR channel: Funding failed due to an internal error.” In this article, we will break down the possible causes and solutions to deal with this error.

Understanding the Error Message

The error message indicates that there was a problem with the Bitcoin network’s ability to fund a transaction. This could be due to a number of reasons, such as:

  • Node connectivity issues

    – The Lightning Network node may not be connected to the Bitcoin mainnet or other nodes.

  • Transaction validation errors – The transaction being sent may have been rejected by the validator due to internal errors.
  • Network congestion: High traffic or network congestion can cause delays in transaction processing.

Possible solutions

To resolve the “ERROR channel: funding failed due to internal error” issue, try the following:

  • Check node connectivity: Make sure both the Lightning Network and Bitcoin mainnets are connected and functioning properly.
  • Check for transaction validation errors: Check if the transaction being sent is valid using a tool like [Bitcoin.js]( or [Blockchain.com]( If there are any issues, they may need to be resolved before proceeding.
  • Optimize network congestion – If the issue persists, consider optimizing your network configuration by adjusting settings such as:
  • Node weight

    – Adjusting the node weight can help alleviate congestion and improve transaction processing times.

  • Batch size – Increasing the batch size can help reduce the number of transactions being processed simultaneously.
  • Use a different Lightning Network node – If possible, try connecting to another Lightning Network node to see if the issue is specific to this particular node.

Additional tips

  • Make sure you’re running the latest version of your preferred Bitcoin client (e.g., [bitcoin-cli](
  • Regularly update your system and dependencies to ensure you have the latest security patches.
  • Consider enabling debug logging for both the Lightning Network node and the Bitcoin mainnet to learn more about any issues.

By following these steps, you should be able to resolve the “ERROR channel: funding failed due to internal error” issue when connecting to a Lightning Network node. If the issue persists, feel free to reach out to our community support team for further assistance.


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