Bitcoin: Program of Non -Correspondence of the Witness Program When Sending A Transaction Signed On Regtest
As a Bitcoin Developer, you are probably not foreign to the shades of performing a testing node or testing your wallet. However, when it comes to sending transactions, simple operations can also launch unexpected errors. In this article, we will deepen a specific error that is causing frustration for many users and we will explore the reason why it occurs.
The Error: Error of Non -Correspondence of the Witness Program
When trying to send a transaction on the Bitcoin Regtest Node (also known as a “simulated” or “testnet” node), the error message displayed is enough instructive:
`
Er Ever ("RPC Error: Object {\" Code \ ": Number (-26), \" Message \ ": Hash Not Valid for the Witness Program"
At first glance, this looks like an error relating to the transaction itself. However, to a more careful examination, we can see that the real problem lies in the witness program.
The Witness Program: A Cryptographic Hashing Scheme
In Bitcoin, transactions are represented as a sequence of blocks with various elements as inputs, outputs and transactions. To guarantee these transactions, each block is connected to its predecessor through the Mordell-Samuel Curve, a cryptographic hash function that helps to check the chain of ownership.
The witness program is responsible for the generation of this cryptographic hash, which is essential to Guarantee the integrity of the blockchain. It is essentially a complex mathematical formula that takes into account various parameters, such as the block number, the merkle root and the data of the witnesses (for example, input indices and transactions output).
Hash Lack of Correspondence Error: What Goes wrong
When sending transactions to the regtest node, theRegtest Control Row Tool to Transmit Transactions are likal to be used. However, in some cases, this process can lead to an error of non -hash correspondence.
HERE’S What Happens:
- Hash calculation of the witness program : When performing a transaction on the regtest node, the witness program is used to generate a cryptographic hash for each block.
- Taxation of transactions : Therefore check that the transaction has been validated correctly using tools such as
bfs(Bitcoin fork Checker) oBfs-Cacker.
- Hash Calculation : before sending the transaction to the network, the hash of the witnesses is calculated using a tool like "witnessprogramhash".
The Problem: Hash of the Non -valid Witnesses Program
In some cases, there may be a problem with the hash calculation of the witness program. This can occur for various reasons such as:
- Incorrect input data (e.g. non -valid input indices or transaction exits).
- Versions of the Obsolete Witnesses Program.
- Network Connectivity Problems.
When your regest node meets an error of non -hash correspondence, it is usually caused by one of these factors. In this case, theRegtest ‘tool displays an error message that indicates that the hash of the witness program is not valid.
Solution: Debug and Resolution
To solve this problem, follow these steps:
- check the input
Date: make sure all input data are correct and valid.
- Update the Witness Program : Check for any updates to the code or versions of the Witness Program.
3
If none of these steps solves the problem, it may be necessary to ask for further help from the Bitcoin Community or by the Administrator of the Testnet Node.
Conclusion
The error of non -Correspondence hash of the witness program is a common problem that can be caused by various factors. By understanding the causes below and underertaking corrective actions, you should be able to resolve this error and correctly wander transactions to the regtest node. Remember to verify the input data, update the versions of the witness program and reintegrate `witnessprogramhash! With correct inputs to Guarantee a Regular Transaction Experience.
