A discovery in the original Bitcoin source code, version 0.1, has revealed little-known aspects of the ideas that Satoshi Nakamoto, the cryptocurrency's creator, had in mind during the project's early days.  

According to a post on X by user Alex Waltz (@raw_avocado), the initial Bitcoin client included references to a poker game and an eBay-like marketplace, as well as plans to implement an escrow system.  

These elements, although never realized, offer a glimpse into Nakamoto's ambitions beyond creating a decentralized digital money system. 

The image shared by Waltz shows snippets of Bitcoin's source code, clearly showing classes and functions related to a poker game.  

For example, in the file “uibase.cpp”, there are definitions such as “CPokerDialogBase” and “CPokerLobbyDialogBase”, which suggest an interface for an online poker game.  

Likewise, the "market.h" and "market.cpp" files identify classes such as "User," "Review," and "Product," designed for a digital marketplace with features reminiscent of platforms like eBay, where users could exchange goods or services.  

  The code for these Bitcoin applications was left unfinished by Satoshi. Source: X network post.

Bitcoin Escrows 

A third notable item in the post is a correspondence between Satoshi Nakamoto and Martin Malmi, one of the project's earliest contributors, dated May 3, 2009. In the email, Nakamoto mentions his intention to work on an "escrow function," which is necessary to facilitate secure transactions of physical goods and eventually support the use of Bitcoin with fiat currencies. 

This discovery puts Nakamoto's possible motivations for creating the world's most important cryptoasset into perspective. On the one hand, interest in a Bitcoin poker game may have been related to the legal restrictions imposed on online gambling sites at the time , particularly in the United States, where laws prohibited financial institutions from processing payments related to online gambling.  

Although a few years later, a decentralized system like Bitcoin could have been conceived as a solution to circumvent these limitations, allowing direct transactions between players without intermediaries. 

However, Nakamoto's ideas never came to fruition. The poker game and eBay-style marketplace remained incomplete fragments of the code , and the escrow system mentioned in his correspondence with Malmi was never implemented.  

Oracles: a technical difficulty of the time 

One reason could be related to the technical challenges of the time, particularly regarding the use of oracles for escrow systems. An oracle in the digital cryptoasset ecosystem acts as an intermediary between a smart contract and real-world data. Therefore, they are vital for DeFi. and various other applications. 

According to a comment by Waltz in response to another user on X, the main obstacle to implementing an escrow system in Bitcoin is the dependence on a trusted oracle, a key piece for verifying the conditions of a transaction. 

The discussion on X has also opened a debate about the nature of these code snippets. Michael Dunworth, another user, suggested that the code related to poker and the market might not be Nakamoto's original work, but rather a " copy-paste" paste" from other sources.  

Waltz responded that, while this is possible, the only code known for certain to have been copied into Bitcoin is that related to cryptographic functions, taken from the Crypto++ library. This suggests that, at least in part, the poker game and market ideas may have been a genuine attempt by Nakamoto to explore practical applications for Bitcoin, anticipating features that later developers integrated not only into Bitcoin, but into all cryptocurrency networks.

On the other hand, a thread on the BitcoinTalk forum, started by user "Matb001" in 2024, provides further context on Nakamoto's interest in poker, both in writing and through a series of podcasts on the topic. This user intends to code Bipcoin, a P2P Cash implementation that uses a Bitcoin platform designed to bring decentralized, provably fair poker to life, drawing inspiration from Satoshi's ideas and his unfinished code. 

The Bitcoin v0.1 poker game could have been an experiment to test the network's capabilities in a decentralized gambling environment. Although the project didn't move forward, one user (@luisschwab_) points out that subsequent initiatives, such as BIP 777, have attempted to revisit these ideas by proposing solutions for integrating poker applications into the Bitcoin network. According to him, this Bitcoin Improvement Proposal is a possible solution to the problems of escrow and secure transactions in such applications.  The truth is that these revelations underscore Nakamoto 's vision of Bitcoin as more than just a digital currency, preempting later collaborators and developers. 

Their initial plans appear to have encompassed a broader ecosystem, where Bitcoin would not only serve as a medium of exchange and the infrastructure that makes it possible, but also as the basis for decentralized applications, later called dApps on Ethereum. Although the poker game and eBay-style marketplace remained preliminary concepts, their presence in the original Bitcoin code invites reflection on the potential Nakamoto saw in his creation and the technical challenges he faced in its early days