Bitcoin OP_CAT upgrade: Could Satoshi’s old code make a come back?

    The Bitcoin OP_CAT discussion was trending once more among developers.
    There were no security concerns regarding the proposal and many benefits, experts said.

As a researcher who has been tracking the Bitcoin ecosystem for over a decade now, I have to admit that the recent buzz around OP_CAT has piqued my curiosity. My journey into blockchain started with Satoshi’s whitepaper and witnessing the birth of Bitcoin. I remember the early days when every line of code was scrutinized, and every development was met with both excitement and apprehension.


Bitcoin [BTC] was trending sideways and downward in the months since the halving, taking the confidence out of long-term investors. One thing that hasn’t slowed down is the developer ecosystem behind the largest crypto asset.

This dedicated team of developers constantly works on numerous suggestions and instruments, aiming to enhance the decentralization aspect within blockchain technology. One such endeavor, which initially belonged to the Bitcoin protocol, is the OP_CAT opcode. However, Satoshi Nakamoto decided to eliminate it in 2010 due to security-related issues.

What is OP_CAT?

The OP_CAT function, which is also recognized as BIP-420, offers the ability to combine or link two pieces of data within a pile (or stack). This linked data becomes the topmost elements in the stack, ensuring they are the initial values that any subsequent operation acts upon within a transaction.

This significantly enhances the capabilities of the Bitcoin network, similar to how Ethereum‘s smart contracts operate. However, back in 2010, there were worries that implementing this linking function might consume excessive memory resources and could potentially create security loopholes.

Lately, developers have been keen to find methods for performing more tasks directly on the blockchain, and the OP_CAT has resurfaced as a significant topic of discussion among tech professionals.

Is this a step toward the Bitcoin Satoshi vision?

The founder and chief executive of Bitcoin trading platform Bioniq, Dr. Robert Bodily, recently expressed on X that OP_CAT is much more significant than he initially thought. He further explained that this development will fundamentally transform Bitcoin, but assured no additional security risks are introduced to the Bitcoin network with its implementation.

The individual proposed that enhancing the Bitcoin Virtual Machine, either as BitVM or BitVM2 (an improved version of the initial BitVM), would lead to a noticeable improvement – making it more efficient, cost-effective, and adaptable, according to him.

Read Bitcoin’s [BTC] Price Prediction 2024-25

According to its creator, Drivechains – a proposed Bitcoin soft fork – is not expected to disrupt the robust stability and security that Bitcoin currently enjoys. This simple modification consists of just ten lines of code and can be deactivated as easily as flipping a switch, Paul Sztorc explained.

Last month, Robin Linus, joint author of BitVM2, released a paper aiming to clarify certain misunderstandings regarding OP_CAT.

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2024-09-03 10:15