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What are Smart Contracts?

Technical AnalysisBlockchain
By: WEEX|2025-09-19 13:15:40
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Intro to Smart Contracts

Smart contracts are self-executing agreements written in code and deployed on a blockchain. They automatically enforce the terms of an agreement between parties when predefined conditions are met, removing the need for intermediaries. By automating transactions, smart contracts enhance efficiency, reduce costs, and increase transparency and trust across a variety of industries. These intelligent contracts represent a fundamental shift in digital agreement design and execution.

Before the advent of smart contracts, it was difficult to create decentralized systems where multiple parties could transact without relying on a central authority. Platforms like Uber and Airbnb, for instance, depend on a central entity to manage transactions and enforce rules between users and service providers.

With the emergence of blockchain technology, smart contracts offer a more secure, efficient, and trustless way to execute agreements. They enable direct peer-to-peer transactions, opening the door to a new generation of decentralized applications.

This article explores what smart contracts are, how they work, their benefits and limitations, and the transformative impact they are having across numerous sectors.

What Are Smart Contracts?

A smart contract is a self-executing program stored on a blockchain that runs automatically when specific conditions are satisfied. Unlike traditional contracts, which rely on legal language and third-party enforcement, smart contracts operate based on code.

A useful analogy is a vending machine: you insert payment, and the machine automatically dispenses the product. Similarly, smart transactions eliminate manual intervention and reduce the need for intermediaries.

Because they reside on a decentralized blockchain, smart contracts are transparent, tamper-resistant, and immutable once deployed. This ensures reliability and security across various use cases.

The History and Evolution of Smart Contracts

The term "smart contract" was coined in 1994 by computer scientist and legal scholar Nick Szabo, who also conceptualized "Bit Gold" in 1998—a precursor to Bitcoin. He envisioned computerized protocols that could execute contract terms automatically, inspired by electronic systems like point-of-sale terminals.

In a 1996 paper, Szabo defined a smart contract as:

"a set of promises, specified in digital form, including the protocols within which the parties perform on the other promises."

He accurately predicted that financial instruments such as derivatives and securities could be standardized and traded efficiently via automated systems.

While some have speculated that Szabo might be Bitcoin’s anonymous creator, Satoshi Nakamoto, he has denied this. Nevertheless, his work laid the theoretical foundation for smart contracts long before blockchain technology existed.

How Do Smart Contracts Work?

Smart contracts operate using simple "if-then" logic. They are triggered by specific events—such as a payment, a date, or an input from an external data source (via "oracles").

Once deployed on a blockchain, the contract is distributed across the network. Each node validates the conditions and execution, ensuring consensus and transparency. When the conditions are met, the contract automatically performs the agreed-upon actions.

Although Ethereum popularized smart contracts, many other blockchains—including Solana, Cardano, Polkadot, and Tezos—now support them. Developers write smart contracts in programming languages such as Solidity, Plutus, and Michelson. Many projects also rely on smart contract templates to accelerate development and improve security.

This automation enables more efficient and secure processes in areas like finance, real estate, and supply chain management.

Pros and Cons of Smart Contracts

Pros

  • Automation & Efficiency: Self-executing contracts save time and reduce manual effort.
  • Cost Reduction: Removing intermediaries lowers transaction fees.
  • Transparency & Trust: Terms and executions are visible and verifiable by all parties.
  • Security: Cryptographic encryption and decentralization help prevent fraud and tampering.

Cons

  • Rigidity: Contracts are only as good as their code. They lack flexibility for unplanned scenarios or subjective interpretations.
  • Difficulty Updating: Fixing bugs or changing terms requires broad consensus and is often complex.
  • Dependence on Oracles: Many contracts need external data, which must be reliably supplied—introducing potential complexity and points of failure.

Use Cases of Smart Contracts

Smart contracts are already transforming industries by enabling trustless automation and reducing operational costs. Many people also explore how to make money with smart contracts through yield farming, NFT minting, and decentralized app (dApp) development.

  1. Mortgages Automating verification, payment schedules, and fund disbursement speeds up processes and reduces the need for banks or lawyers.
  2. Digital Identity Individuals can control and share personal data securely without intermediaries. Estonia’s blockchain-based digital ID system is a leading example.
  3. Supply Chain Every step of a product’s journey can be recorded on a blockchain, increasing traceability and reducing fraud.
  4. Bank Bot Smart Contracts Automated banking agents powered by smart contracts can handle loans, payments, and compliance checks without human intervention, streamlining financial operations.
  5. DeFi and Etherions Core Smart Contracts Embedded Many decentralized finance platforms rely on highly optimized smart contract systems like Etherions core smart contracts embedded in their architecture to ensure security and high-performance transactions.

Challenges and the Road Ahead

Despite their potential, smart contracts are not without risks. The infamous DAO hack in 2016, where millions in ETH were stolen due to a code vulnerability, highlighted the importance of security audits and careful design.

Because smart contracts are immutable, errors can be costly. Today, many projects rely on professional third-party audits to minimize risks.

Still, the technology is young and evolving. As tools and best practices improve, smart contracts are expected to gain broader adoption.

Conclusion

Smart contracts represent a major shift in how agreements are made and executed. By replacing intermediaries with transparent and automated code, they reduce cost and build trust between parties.

While challenges around security, flexibility, and real-world data integration remain, the potential applications are vast and transformative. From intelligent contracts in governance to automated bank bot smart contracts in finance, the technology is paving the way for a more efficient digital economy.

The technology is still developing, and wider acceptance appears inevitable as blockchain ecosystems mature and more industries recognize the benefits of decentralized, self-executing contracts.

Further Reading

Disclaimer: The opinions expressed in this article are for informational purposes only. This article does not constitute an endorsement of any of the products and services discussed or investment, financial, or trading advice. Qualified professionals should be consulted prior to making financial decisions.

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In an era of intensifying geopolitical friction, the crypto market is reacting to and absorbing shocks far faster than traditional finance (TradFi).

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Middle East Escalation: Bitcoin Leads the "War Premium"

Over the past 96 hours, the global order has been shaken to its core. As the only 24/7 financial frontline, the crypto market has been the first to "foot the bill" for the war premium:

February 28: The US and Israel launch massive airstrikes, deploying over 1,200 missiles. Bitcoin (BTC) flash-crashes 4.4%, while Gold and Crude Oil spike 1.3% and 4%, respectively.Same day: Reports confirm the death of Iran’s Supreme Leader Khamenei and several high-ranking officials. As rumors of the "decapitation strike" conclude, BTC stages a aggressive V-shaped recovery, while Gold enters a consolidation phase.March 1–2: Iranian forces retaliate with missile strikes against US and Israeli positions. While the Foreign Ministry initially denies intentions to block the Strait of Hormuz, the Islamic Revolutionary Guard Corps (IRGC) officially closes the chokepoint on March 2, sending oil prices into the stratosphere.March 3: Donald Trump asserts US military superiority, stating the military is "locked and loaded." Concurrently, capital flight from Iranian crypto exchanges surges by 700%.

Because traditional markets are closed over the weekend, crypto has become the ultimate "relief valve" and 24/7 outlet for investors to hedge risks and bet on real-time developments.

A Look at the Rearview Mirror: History Doesn’t Repeat, But It Rhymes

Past geopolitical conflicts show a strikingly consistent pattern: Short-term emotional shockwaves followed by mid-to-long-term rallies driven by safe-haven demand and liquidity expectations.

2022 Russia-Ukraine War: BTC dropped 7% on Day 1 but rallied 25% within a month.2023 Israel-Hamas Conflict: BTC dipped 5% in a week, only to surge over 80% three months later.2025 Iran-Israel Clash: An initial 7.5% weekly slide was followed by a 25% recovery within 30 days.

When chaos breaks out, liquidity is often the first casualty, and Bitcoin usually bears the brunt of the initial "sell everything" panic. However, its identity as a "non-sovereign asset" eventually brings it back to its original trajectory—and often beyond.

"This Time is Different": The New Guard

To be specific, the market resilience is markedly stronger than before.

Since the fourth halving, institutional players have taken the wheel. While the current conflict is arguably more intense than previous ones, Bitcoin’s drawdowns are shallower and shorter.

Simultaneously, spot ETFs and institutional "Diamond Hands" are playing the long game; they don’t liquidate over weekend headlines. This structural maturity provides a massive liquidity buffer that absorbs emotional selling.

The conflict is far from over. If the Strait of Hormuz remains blocked for the long haul, the market narrative will shift from a simple "inflation hedge" to a "global recession defense".

While the smoke of war has been seen, a new financial order is quietly taking root on-chain. We are keeping a close monitor.

How to Earn Passive Income with USDC: WEEX Launches Flexible USDC Staking

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Founded in 2018, WEEX has developed into a global crypto exchange with over 6.2 million users across more than 150 countries. The platform emphasizes security, liquidity, and usability, providing over 1,200 spot trading pairs and offering up to 400x leverage in crypto futures trading. In addition to the traditional spot and derivatives markets, WEEX is expanding rapidly in the AI era — delivering real-time AI news, empowering users with AI trading tools, and exploring innovative trade-to-earn models that make intelligent trading more accessible to everyone. Its 1,000 BTC Protection Fund further strengthens asset safety and transparency, while features such as copy trading and advanced trading tools allow users to follow professional traders and experience a more efficient, intelligent trading journey.

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BTC Approaches $60K: Crypto Isn't Dead, It's Just Filtering the Noise

Macro disturbances, leverage collapses, and sluggish trading volumes are the hallmarks of every crypto bear market.

Let's temporarily step back from the AI bubble of June 2028 and focus on the crypto market in February 2026. Recently, BTC has fallen back to the $60K level, and the market is quiet and sluggish. We've reached another critical juncture where we should learn from history.

To truly grasp the "chill" in 2026, we first need to break down what happened during those "freezing moments" in previous bear markets.

The ICO Bubble Burst and Regulatory Winter of 2018

2018 marked a full year of the crypto market swinging from euphoric bull runs to a deep freeze bear phase. Bitcoin plummeted from its late — peak of nearly $20,000 to around $3,200 in 2017, with the overall market cap evaporating by over 80%. The industry went through the growing pains of shifting from wild speculation to more grounded buildings.

The key themes of this bear market were "liquidity drought and shattered faith."

The macro environment back then was brutally harsh:

- Global economic recovery was sluggish, and the Fed kicked off a rate-hike cycle, raising rates four times that year and ending with the federal funds rate at 2.25%-2.50%;

- China had already banned ICOs and exchanges the previous year, and in 2018, the U.S. SEC ramped up scrutiny and lawsuits, with many countries and regions following suit with their own bans.

At the same time, the massive wealth-creating ICO frenzy from 2017 finally popped, with hacks hitting platforms like Mt.Gox and Bitfinex fueling the panic. Many mining operations have been shut down in droves, and "blockchain is a scam" became the mainstream media's go-to narrative.

In terms of impact, this bear cycle wiped out over 95% of ICO projects, but as every cloud has a silver lining, it paved the way for the DeFi boom in the next bull run. Some institutions started dipping their toes into Bitcoin on a small scale.

The Leverage Meltdown and Rate-Hike Crisis of 2022

In 2022, Bitcoin tumbled from $69,000 to around $15,000, with the drop less severe than in 2018.

Compared to 2018, the 2022 bear market was also fueled by macro disruptions and a restructuring of the existing ecosystem.

Macros sucked up liquidity like a vacuum:

- Post- pandemic economies were dealing with persistent high inflation, and the Fed hiked rates seven times to 4.25%-4.50%, marking the fastest, largest, and most frequent dollar rate increases since 1982.

- Regulatory pressures escalated again, with the EU reaching key agreements on MiCA regulations, and the U.S. SEC tightening enforcement on stablecoins and exchanges.

Inside the crypto space, it was a chain reaction starting with the Terra/Luna algorithmic stablecoin collapse, which dragged down Celsius, Three Arrows, FTX, and others into bankruptcy. Sectors like NFTs, GameFi, and the metaverse fell into a deep slumber.

Even though the market turned chilly once more, long-term holders (LTH) started hitting record-high holdings, institutions like MicroStrategy ramped up their stakes dramatically, and the purge of CeFi ecosystems sped up the rise of self-custody, Layer2 solutions, and more.

In-depth compliance review in 2026

Heading into 2026, Bitcoin has broken below $80K, $70K, and $60K one after another. The Fear & Greed Index has spent a whopping 26 days in extreme fear territory over the past month, and Google searches for "Bitcoin is dead" have spiked to all-time highs—familiar bear market vibes making a comeback.

Compared to the past, the spread of market risks has intensified short-term sell-offs, but the underlying logic is a bit different:

- Even though we're in a mild rate-cutting phase right now, as we discussed in "Gold & Silver Hit New Highs, Is Bitcoin's Safe-Haven Narrative Losing Its Luster?", funds are flocking to gold and silver for shelter amid escalating sovereign debt crises, U.S. tariff trade wars, and potential threats to Fed independence. A certain number of crowds even reckon that AI has overtaken Web3 as the hot tech story, putting crypto right in the crosshairs.

- On the regulatory front, U.S. crypto policies have turned more friendly, but the odds of the CLARITY bill passing have taken a nosedive.

Of course, in this round of innovation narratives, we've seen a ton of high-funding, high-FDV infrastructure projects without real revenue keep tumbling. Narratives like Layer2, Restaking, and Memecoins have gone quiet, while the ETF story has ushered in an institution-dominated era. Right now, privacy, prediction markets, and stablecoins are still leading the pack.

If we look at volatility, as shown in the chart below, Bitcoin's 60-day average volatility has been trending downward year by year—a clear shift. Unlike the bubble bursts of 2018 or the leverage blowups of 2022, 2026 feels more like a weary adjustment. Although it was cold, it felt more like a mild winter.

While it's too early to call it the "market bottom", it's clear that the chill in 2026 isn't the dramatic crash of old bear cycles — more like a deep recalibration in this era of hyper-compliance.

For investors, the long-term upward potential in crypto markets far outweighs the downside risks. However, where will the next wave of narratives pivot to? As the proverb says, "Time will tell" — let's keep our eyes peeled.

 

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