The idea behind crypto's biggest legal promise started with something as simple as a vending machine

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In the 1990s, long before Bitcoin existed, a cryptographer named Nick Szabo coined the term smart contract using the humble vending machine as his guiding example. Put a coin in, get a snack out, no negotiation, no delay, no need to trust the machine's owner personally, the mechanism itself simply enforces the deal. Modern smart contracts take that exact same logic and apply it to blockchain based agreements, pieces of code stored on a blockchain that execute automatically and predictably once certain predefined conditions are met

Because the code itself is what enforces the agreement rather than a court, a notary or a company's own goodwill, smart contracts are often described using the phrase code is law. If a payment is received, a smart contract can automatically release funds, transfer ownership, or trigger any number of other predefined actions, all without needing a human intermediary to manually approve, process or verify that everything happened correctly along the way

In practice, the legal reality is messier than the slogan suggests. Courts and regulators in multiple countries have had to wrestle with genuinely hard questions, is a smart contract actually legally binding, how should a court interpret one if a dispute arises anyway, and what happens if a technical bug causes the code to behave in a way nobody actually intended. Most legal scholars now land somewhere in between the two extremes, smart contracts can absolutely be treated as legally enforceable agreements when the traditional elements of a contract are present, but the code is law slogan tends to work best in theory and gets considerably more complicated the moment a real world dispute actually needs resolving

What Is a Smart Contract? Explained Clearlywww.cyberaltitude.com