The legal challenges of a smart contract

You legal challenges of a smart contract emerge as one of the most intriguing themes at the intersection of technology and law, as digital transformation redefines contractual relationships.

Smart contracts, or smart contracts, are self-executing codes on blockchain that automate agreements without intermediaries.

While promising efficiency and transparency, these innovations bring legal dilemmas that challenge traditional legal systems.

How to ensure that immutable code aligns with the nuances of the law?

This article delves into the regulatory, technical, and ethical hurdles, offering a critical and up-to-date analysis for readers seeking to understand the impact of this technology.

The growing adoption of smart contracts across different sectors highlights the urgent need for a legal framework that can keep up with this evolution.

This includes training legal professionals capable of dealing with the specificities of this new reality.

The Nature of Smart Contracts and the Clash with Traditional Law

Imagine a contract that, like a finely tuned engine, operates on its own, without the need for a human driver.

This is the essence of smart contracts: blockchain-based programs that automatically execute clauses when predefined conditions are met.

For example, a rental agreement can release payment to the landlord as soon as the tenant confirms delivery of the keys, all encoded and immutable.

However, this automation clashes with the flexibility inherent in contract law, which values human interpretation and adaptation to unforeseen circumstances.

One of the legal challenges of a smart contract lies in the rigidity of its execution.

Traditional law allows for contractual adjustments in cases of force majeure or unforeseeable changes, but a smart contract, once implemented, is immutable.

In 2023, Chainalysis reported that 60% of blockchain disputes involved smart contracts with clauses that did not anticipate exceptional scenarios, such as technical failures or regulatory changes.

This statistic highlights the need for a balance between code autonomy and legal flexibility.

Furthermore, the lack of predictability in smart contracts could lead to an increase in legal disputes, requiring legal professionals to quickly adapt to this new reality.

Jurisdiction in a Decentralized World

When a contract is signed on paper, the applicable jurisdiction is usually clear, defined by the location of the parties or the chosen forum.

But what about when the agreement is code running on a global blockchain network?

Decentralization, one of the pillars of this technology, creates one of the legal challenges of a smart contract: determine which law governs the agreement.

A fictitious example illustrates this: Ana, in Brazil, contracts a logistics service with Bob, in Australia, via a smart contract on the Ethereum network.

If a conflict arises, which court has authority? Brazil, Australia, or neither?

The absence of clear jurisdiction can lead to unresolvable disputes.

Some argue that smart contracts should include choice of forum clauses, but this contradicts the decentralized philosophy of blockchain.

Another approach is the creation of digital arbitration courts, such as Kleros, which uses blockchain to resolve disputes.

However, these solutions still lack global recognition, which amplifies the complexity of applying national laws to cross-border contracts.

For more information about digital arbitration, you can visit the website of Kleros.

Table 1: Comparison between Traditional Contracts and Smart Contracts

The complexity of jurisdiction in smart contracts requires lawmakers and legal experts to work together to establish clear guidelines.

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The Question of Legal Validity

Another significant hurdle is the legal validity of smart contracts.

In Brazil, the Civil Code requires that contracts be free-form, unless the law determines otherwise, but the absence of a physical document or traditional signatures raises questions.

Can code in Solidity, the language used in Ethereum, be considered a valid contract?

This is one of the legal challenges of a smart contract that Brazilian courts have not yet addressed extensively.

A practical example helps to clarify: suppose a Brazilian startup uses a smart contract to sell tokens of a renewable energy project.

The investor, upon realizing that the project does not deliver what was promised, seeks to cancel the contract.

However, the code has already performed the transfer of tokens.

How can the judiciary intervene if the contract is immutable?

Some countries, such as Malta and Switzerland, have already created specific legislation to recognize smart contracts, but Brazil is still behind in this debate, which generates legal uncertainty.

It is crucial that the Brazilian legal system adapts to include guidelines that recognize and validate smart contracts, ensuring security for all involved.

Privacy and Data Protection

Blockchain transparency, although advantageous, creates conflicts with data protection laws, such as the LGPD in Brazil.

Smart contracts store information on a public ledger, which can expose personal data.

One of the legal challenges of a smart contract is to ensure compliance with privacy regulations.

For example, the LGPD requires the right to be forgotten, but how can data be erased from an immutable blockchain?

An emerging solution is the use of private blockchains or cryptographic techniques such as zero-knowledge proofs, which allow transactions to be validated without revealing sensitive data.

However, these technologies are still under development and not widely adopted, leaving companies and users in regulatory limbo.

The need to balance transparency and privacy is a central theme in discussions about the evolution of smart contracts.

Responsibility and Errors in the Code

Who takes the blame when a smart contract fails?

Unlike traditional contracts, where parties can be held liable for human error, a smart contract relies on the quality of the code.

A bug can lead to significant financial losses, as in the case of the DAO attack in 2016, which resulted in the loss of US$$50 million in Ethereum.

This incident highlights one of the legal challenges of a smart contract: the assignment of responsibility.

Consider a hypothetical scenario: a Brazilian company develops a smart contract for an automatic supplier payment system.

An error in the code causes payments to be duplicated, causing losses.

Who is responsible? The programmer, the contracting company or no one, since the code is “autonomous”?

Courts are still struggling to define whether a smart contract is an independent agent or a tool of the parties involved.

Clearly defining liability is essential to ensure trust in the use of smart contracts in the market.

Table 2: Risks and Solutions in Smart Contracts

These risks and solutions highlight the need for careful development and proper regulations for smart contracts.

Ethics and Fairness in the Use of Smart Contracts

In addition to the technical and legal aspects, the legal challenges of a smart contract also touch on ethical issues.

Automation may exclude populations without access to the technology or knowledge to interact with blockchains.

In Brazil, where digital inclusion is still a challenge, how can we ensure that smart contracts do not amplify inequalities?

This rhetorical question forces us to reflect on the social impact of this innovation.

Ethics also come into play when we consider the intention of the parties.

Traditional contracts allow the parties' will to be interpreted in case of ambiguities, but a smart contract only follows what is encoded.

This can lead to unfair results, especially if one party does not understand the code.

Promoting inclusive digital education is key to ensuring that everyone can benefit from the innovations brought about by smart contracts.

See too: The professions of the future linked to technology and innovation

The Regulatory Future: A Path to Be Built

The regulatory landscape for smart contracts is in the making.

Countries such as Singapore and the United Arab Emirates have already implemented frameworks to integrate these technologies into the legal system, while Brazil still depends on interpretations of the Civil Code and the LGPD.

One of the legal challenges of a smart contract is to create regulations that preserve innovation without sacrificing legal certainty.

The analogy with aviation in the early 20th century is useful: just as the first airplanes required new laws for air navigation, smart contracts demand a new regulatory paradigm.

Governments, businesses and legal experts need to collaborate to develop standards that address jurisdiction, validity, privacy and liability.

This joint effort is crucial to ensure that Brazil does not fall behind in the adoption of innovative technologies.

Conclusion: Balancing Innovation and Legal Certainty

Smart contracts represent a revolution in the way we design agreements, but the legal challenges of a smart contract require creative and collaborative solutions.

From defining jurisdiction to data protection and assigning liability, these hurdles test the limits of traditional law.

With clear regulations and an ethical approach, it is possible to harness the potential of this technology without compromising fairness.

The future of smart contracts depends on our ability to align code with the spirit of the law.

Building a legal environment that embraces innovation is essential to promoting a fairer and more efficient future.

Written by Diego

I'm an SEO writer and editor from Minas Gerais, addicted to pão de queijo (cheese bread) and passionate about transforming ideas into optimized content. A father and a nerd, I always strive to balance responsibility and creativity. My interests range from astronomy to gaming and history. I believe that my passion for diverse topics, combined with my SEO experience, results in high-quality content and results.

Updated May 20, 2025