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Efficient Multi-Input Transaction Grinding for OP_CAT-based Bitcoin Covenants

Efficient Multi-Input Transaction Grinding for OP_CAT-based Bitcoin Covenants

Original Postby benthecarman

Posted on: September 26, 2024 07:49 UTC

When optimizing transaction scripts, one effective strategy involves focusing on the efficiency of data representation and manipulation.

A specific example of this is the recommendation to alter the approach traditionally used with the OP_ADD operation, especially in contexts where the goal is to increment a value by one. Traditionally, the operation might use constants like <1/-1> combined with OP_ADD to adjust a value. However, this method has been identified as less efficient than an alternative that could save space and simplify the script.

The proposed optimization suggests that instead of using a combination of OP_ADD with a push of <1> or <-1>, it would be more resourceful to directly push the values of the last byte and the subsequent last byte incremented by one into the witness. This adjustment not only reduces the byte size of the script by removing the need for an additional operation but also eliminates the complexity associated with determining whether to add or subtract one. This technique exemplifies a broader principle in script optimization: direct manipulation and streamlined operations can lead to more efficient script execution and smaller transaction sizes.

Furthermore, this strategy underscores the importance of continually reevaluating scripting methods to enhance efficiency. By adopting such optimizations, developers can achieve more compact and efficient scripts, which is crucial for scaling and improving the performance of blockchain-based systems. This approach reflects a meticulous attention to detail and a deep understanding of the underlying mechanisms governing script execution, showcasing a commitment to leveraging every possible optimization to refine and improve transaction processing.