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Bitcoin transaction fails with high threshold: “Signature must be zero for CHECK(MULTI)SIG operation to fail”
The world of Bitcoin transactions can be complex, especially when it comes to multisig wallets and their associated verification processes. Recently, a user reported a failure when creating a transaction using a P2SH 3-of-4 script, only to see the same problem arise with a P2SH 5-of-8 script. This result led him to investigate why a high threshold on the multisig wallet was causing such issues.
The Problem: High Threshold and Failed Transaction
In Bitcoin, multisig wallets require multiple signatures for a transaction to be valid. A common setup is to use a multisig 3-of-4 or 5-of-8 setup, where four or five signatures are required in total. However, when using these setups with high thresholds, such as 32,000 or more, the verification process becomes increasingly complex.
In the case of the user who reported the issue, he successfully created a transaction that used a P2SH 3 of 4 script, but it failed to complete due to a high threshold in his multisig wallet. The error message specified that the step “Signature must be zero for failed CHECK(MULTI)SIG operation” was failing.
Understanding the issue
The critical issue here is that when the signature count of a transaction exceeds the configured threshold, the verification process fails. This is because Bitcoin’s CHECK(MULTI)SIG operation relies on each individual script signing the transaction and verifying its validity before proceeding with the rest of the transaction. When the signature count is too high, this step fails to complete.
A solution: lower the threshold
The user was able to solve his problem by lowering the threshold in his multisig wallet from 32,000 to a more manageable level. This adjustment allowed him to successfully create transactions using lower signature counts.
Conclusion and Tips
When working with multisig wallets in Bitcoin, it is critical to be aware of the possibility of high thresholds causing issues during transaction creation. By understanding how these complexities work and taking steps to mitigate them, users can avoid similar issues and ensure their transactions are created correctly.
As always, it is critical to keep in mind that this is a specific scenario and other users may face different challenges when creating and verifying Bitcoin transactions with multisig wallets. However, by understanding the basics of how high thresholds work in Bitcoin, you can take steps to avoid issues like the one reported in this case.
Tips to prevent similar issues:
- Monitor your transaction count and adjust your multisig settings accordingly.
- Check that your wallet settings are up to date and configured correctly.
- Keep your wallet software and plugins up to date, as any outdated versions may introduce bugs or conflict with other wallets.
By being informed about the potential dangers of high thresholds in Bitcoin transactions and taking steps to mitigate them, you can enjoy a smoother experience when working with multisig wallets in this popular cryptocurrency.
