If you ask most people what cryptocurrency is, they’ll probably think of Bitcoin. It was the first digital currency, the pioneer of blockchain. But if you ask those immersed in Web3—developers, creators, or investors—they’ll tell you that the real action is happening on Ethereum. And within Ethereum, the ERC-20 token standard is what makes the ecosystem thrive.

ERC-20 tokens are not just another type of cryptocurrency. They are the foundation of an economy: programmable, flexible, and standardised in a way that allows thousands of projects to exist side by side. From stablecoins like USDC to governance tokens like UNI, and yes, even to the creator tokens minted on Paragraph.xyz, ERC-20 is the quiet backbone that makes it all possible.

💡 Analogy: Think of Ethereum as a massive app store. ERC-20 tokens are like the in-app currencies that make every app usable and tradable. Without a common standard, every app would invent its own incompatible currency. With ERC-20, suddenly all the apps and wallets can “speak the same language.”

That shared language is what powers Paragraph coins—and understanding ERC-20 is the first step to seeing why they are so powerful for writers.

When Ethereum launched in 2015, it introduced something new: smart contracts. Unlike Bitcoin, which was designed only for transactions, Ethereum could host entire applications. Developers quickly began creating their own tokens inside Ethereum.

But there was a problem. Each developer built tokens differently. One might code transfers in one way, another in a completely different way. Wallets struggled to keep up. Exchanges had to write custom code for every new token. It was like every country using a different type of plug for electricity—chaotic and inefficient.

In late 2015, Ethereum developer Fabian Vogelsteller, with input from Vitalik Buterin, proposed a solution: ERC-20, short for Ethereum Request for Comment #20. This was a set of rules that all tokens should follow to ensure compatibility.

The brilliance of ERC-20 was its simplicity. By agreeing on a standard, any wallet, exchange, or application could easily integrate new tokens without rewriting their systems each time. It was like introducing a universal power socket for Ethereum.

The result? An explosion of tokens. The ICO boom of 2017—when projects raised billions through “Initial Coin Offerings”—was made possible because ERC-20 tokens could be created quickly and distributed globally. It was both a blessing and a curse: many projects were scams or failures, but ERC-20 itself proved unstoppable.

Today, thousands of tokens follow this standard. And while new token types have emerged, ERC-20 remains the workhorse of the Ethereum economy.

At its heart, ERC-20 is a rulebook. It defines the functions that every ERC-20 token must have. These rules are simple but powerful because they ensure interoperability.

Here are the key functions explained in plain language:

• totalSupply()

  • What it does: Tells you how many tokens exist in total.

  • Analogy: Like a central bank announcing the total number of dollars in circulation.

• balanceOf(address)

  • What it does: Shows how many tokens a given wallet owns.

  • Analogy: Checking your bank balance.

• transfer(to, amount)

  • What it does: Sends tokens directly from one person to another.

  • Analogy: Handing someone cash.

• approve(spender, amount) and allowance(owner, spender)

  • What they do: Approve another account (usually a smart contract) to spend tokens on your behalf, up to a set limit.

  • Analogy: Giving your friend permission to use your credit card up to $100.

• transferFrom(from, to, amount)

  • What it does: Executes a transfer from one account to another if permission was granted.

  • Analogy: Your friend is actually using that $100 limit at the store.

These functions may sound technical, but they’re what allow ERC-20 tokens to move seamlessly between wallets, exchanges, and decentralised applications.

💡 Real-world illustration: When you swap USDC for ETH on Uniswap, the smart contract calls approve() and transferFrom() behind the scenes. The rules of ERC-20 ensure that no matter what token you’re swapping, the process is always the same.

This universality is why ERC-20 has been called the “Lego brick” of Web3—small, simple, but infinitely combinable.

ERC-20 is not just theoretical. It powers some of the most widely used digital assets in the world:

• Stablecoins

  • Examples: USDC, USDT, DAI.

  • Purpose: Pegged to the U.S. dollar, they make crypto stable and usable for payments.

  • Why it matters: Millions rely on them daily for remittances, DeFi, and savings.

• Governance Tokens

  • Examples: UNI (Uniswap), AAVE, COMP.

  • Purpose: Let holders vote on protocol upgrades, fees, and treasury use.

  • Why it matters: They turn communities into decentralised organisations.

• Utility Tokens

  • Examples: BAT (Basic Attention Token), GRT (The Graph).

  • Purpose: Used for specific platform functions—ads, data queries, or service payments.

• Meme & Community Tokens

  • Examples: SHIBA INU (SHIB), PEPE.

  • Purpose: Community-driven economies that often start as jokes but grow into cultural movements.

• Creator Tokens

  • Examples: Rally, Paragraph Coins.

  • Purpose: Represent a writer, artist, or community. Supporters buy them to fund creators and gain perks.

💡 Case Study: USDC has become so reliable that even major fintech companies integrate it. Imagine sending money to a friend overseas—not in 3 days with a bank transfer, but instantly with USDC. This is ERC-20 in action: fast, standardised, and global.

ERC-20 tokens are fungible. This means every unit of the token is identical to every other unit.

• 1 USDC = 1 USDC, no matter where it came from.

• 1 LINK = 1 LINK, whether bought yesterday or last year.

This fungibility makes ERC-20 tokens liquid and interchangeable—perfect for money, utility, and community use cases.

Contrast this with NFTs (ERC-721 tokens): each NFT is unique, like an art piece. NFTs are great for collectables or identity, but not for interchangeable assets.

💡 Analogy: ERC-20 tokens are like seats in general admission at a concert—you don’t care which seat, because all are the same. NFTs are like assigned VIP seats—each one has a specific row and number.

This simple difference is why Paragraph coins, which are designed to be interchangeable, use ERC-20 rather than ERC-721.

• Interoperability: Works everywhere—wallets, exchanges, dApps.

• Liquidity: Easy to buy, sell, and swap.

• Simplicity: Developers can launch tokens with minimal coding.

• Adoption: Thousands of projects and billions in value already use ERC-20.

• Gas Fees: On Ethereum mainnet, transactions can be costly ($10–$50).

• Scalability: Before Layer 2s, Ethereum could only process ~15 transactions per second.

• Smart Contract Bugs: Poorly written ERC-20 contracts have led to exploits.

💡 Resolution: Layer 2 networks like Base (where Paragraph coins live) solve many of these weaknesses with cheap, fast transactions.

Now we come full circle: why Paragraph coins are built as ERC-20 tokens.

• Fungibility: Every coin is identical, making them easy to trade and price.

• Wallet Support: ERC-20 is supported everywhere—MetaMask, Coinbase Wallet, Uniswap.

• Liquidity: Paragraph coins can be instantly swapped for ETH or USDC on decentralised exchanges.

• Community Alignment: ERC-20 tokens fit perfectly with the idea of building a shared economy around writing.

Imagine this: A writer publishes an essay on Paragraph. Instantly, coins are minted. Early supporters buy in at $1. As more people join, demand rises, and the coin’s value increases. The writer earns, the readers benefit, and the community grows—all thanks to ERC-20.

💡 Mini Story: A climate journalist launches a series. Readers buy her Paragraph coins at launch. Months later, as her reputation grows, her coins are worth five times more. Early supporters aren’t just fans—they’re partners who saw both intellectual and financial returns.

This is only possible because ERC-20 tokens are universally recognised, tradable, and programmable.

ERC-20 isn’t just a technical standard. It is the alphabet of Ethereum, the set of building blocks from which entire economies are written.

It enabled the ICO boom, the rise of DeFi, and now, the birth of creator coins on platforms like Paragraph.xyz.

Without ERC-20, the dream of turning an essay into a tradable asset, of transforming readers into stakeholders, would not exist. With it, we enter a new age of publishing—one where writers don’t just produce content, but mint tokens that become the backbone of their communities.

The story of Paragraph coins is inseparable from the story of ERC-20. To understand one is to understand the other. And this is why ERC-20 is not just a technical background—it’s the very foundation on which the future of writing is being built.

“Support this journey into Web3 publishing! 🚀✨ Subscribe today to stay updated as we uncover how ERC-20 tokens empower writers, creators, and readers to own their communities and build lasting value.”

If you ask most people what cryptocurrency is, they’ll probably think of Bitcoin. It was the first digital currency, the pioneer of blockchain. But if you ask those immersed in Web3—developers, creators, or investors—they’ll tell you that the real action is happening on Ethereum. And within Ethereum, the ERC-20 token standard is what makes the ecosystem thrive.

ERC-20 tokens are not just another type of cryptocurrency. They are the foundation of an economy: programmable, flexible, and standardised in a way that allows thousands of projects to exist side by side. From stablecoins like USDC to governance tokens like UNI, and yes, even to the creator tokens minted on Paragraph.xyz, ERC-20 is the quiet backbone that makes it all possible.

💡 Analogy: Think of Ethereum as a massive app store. ERC-20 tokens are like the in-app currencies that make every app usable and tradable. Without a common standard, every app would invent its own incompatible currency. With ERC-20, suddenly all the apps and wallets can “speak the same language.”

That shared language is what powers Paragraph coins—and understanding ERC-20 is the first step to seeing why they are so powerful for writers.

When Ethereum launched in 2015, it introduced something new: smart contracts. Unlike Bitcoin, which was designed only for transactions, Ethereum could host entire applications. Developers quickly began creating their own tokens inside Ethereum.

But there was a problem. Each developer built tokens differently. One might code transfers in one way, another in a completely different way. Wallets struggled to keep up. Exchanges had to write custom code for every new token. It was like every country using a different type of plug for electricity—chaotic and inefficient.

In late 2015, Ethereum developer Fabian Vogelsteller, with input from Vitalik Buterin, proposed a solution: ERC-20, short for Ethereum Request for Comment #20. This was a set of rules that all tokens should follow to ensure compatibility.

The brilliance of ERC-20 was its simplicity. By agreeing on a standard, any wallet, exchange, or application could easily integrate new tokens without rewriting their systems each time. It was like introducing a universal power socket for Ethereum.

The result? An explosion of tokens. The ICO boom of 2017—when projects raised billions through “Initial Coin Offerings”—was made possible because ERC-20 tokens could be created quickly and distributed globally. It was both a blessing and a curse: many projects were scams or failures, but ERC-20 itself proved unstoppable.

Today, thousands of tokens follow this standard. And while new token types have emerged, ERC-20 remains the workhorse of the Ethereum economy.

At its heart, ERC-20 is a rulebook. It defines the functions that every ERC-20 token must have. These rules are simple but powerful because they ensure interoperability.

Here are the key functions explained in plain language:

• totalSupply()

  • What it does: Tells you how many tokens exist in total.

  • Analogy: Like a central bank announcing the total number of dollars in circulation.

• balanceOf(address)

  • What it does: Shows how many tokens a given wallet owns.

  • Analogy: Checking your bank balance.

• transfer(to, amount)

  • What it does: Sends tokens directly from one person to another.

  • Analogy: Handing someone cash.

• approve(spender, amount) and allowance(owner, spender)

  • What they do: Approve another account (usually a smart contract) to spend tokens on your behalf, up to a set limit.

  • Analogy: Giving your friend permission to use your credit card up to $100.

• transferFrom(from, to, amount)

  • What it does: Executes a transfer from one account to another if permission was granted.

  • Analogy: Your friend is actually using that $100 limit at the store.

These functions may sound technical, but they’re what allow ERC-20 tokens to move seamlessly between wallets, exchanges, and decentralised applications.

💡 Real-world illustration: When you swap USDC for ETH on Uniswap, the smart contract calls approve() and transferFrom() behind the scenes. The rules of ERC-20 ensure that no matter what token you’re swapping, the process is always the same.

This universality is why ERC-20 has been called the “Lego brick” of Web3—small, simple, but infinitely combinable.

ERC-20 is not just theoretical. It powers some of the most widely used digital assets in the world:

• Stablecoins

  • Examples: USDC, USDT, DAI.

  • Purpose: Pegged to the U.S. dollar, they make crypto stable and usable for payments.

  • Why it matters: Millions rely on them daily for remittances, DeFi, and savings.

• Governance Tokens

  • Examples: UNI (Uniswap), AAVE, COMP.

  • Purpose: Let holders vote on protocol upgrades, fees, and treasury use.

  • Why it matters: They turn communities into decentralised organisations.

• Utility Tokens

  • Examples: BAT (Basic Attention Token), GRT (The Graph).

  • Purpose: Used for specific platform functions—ads, data queries, or service payments.

• Meme & Community Tokens

  • Examples: SHIBA INU (SHIB), PEPE.

  • Purpose: Community-driven economies that often start as jokes but grow into cultural movements.

• Creator Tokens

  • Examples: Rally, Paragraph Coins.

  • Purpose: Represent a writer, artist, or community. Supporters buy them to fund creators and gain perks.

💡 Case Study: USDC has become so reliable that even major fintech companies integrate it. Imagine sending money to a friend overseas—not in 3 days with a bank transfer, but instantly with USDC. This is ERC-20 in action: fast, standardised, and global.

ERC-20 tokens are fungible. This means every unit of the token is identical to every other unit.

• 1 USDC = 1 USDC, no matter where it came from.

• 1 LINK = 1 LINK, whether bought yesterday or last year.

This fungibility makes ERC-20 tokens liquid and interchangeable—perfect for money, utility, and community use cases.

Contrast this with NFTs (ERC-721 tokens): each NFT is unique, like an art piece. NFTs are great for collectables or identity, but not for interchangeable assets.

💡 Analogy: ERC-20 tokens are like seats in general admission at a concert—you don’t care which seat, because all are the same. NFTs are like assigned VIP seats—each one has a specific row and number.

This simple difference is why Paragraph coins, which are designed to be interchangeable, use ERC-20 rather than ERC-721.

• Interoperability: Works everywhere—wallets, exchanges, dApps.

• Liquidity: Easy to buy, sell, and swap.

• Simplicity: Developers can launch tokens with minimal coding.

• Adoption: Thousands of projects and billions in value already use ERC-20.

• Gas Fees: On Ethereum mainnet, transactions can be costly ($10–$50).

• Scalability: Before Layer 2s, Ethereum could only process ~15 transactions per second.

• Smart Contract Bugs: Poorly written ERC-20 contracts have led to exploits.

💡 Resolution: Layer 2 networks like Base (where Paragraph coins live) solve many of these weaknesses with cheap, fast transactions.

Now we come full circle: why Paragraph coins are built as ERC-20 tokens.

• Fungibility: Every coin is identical, making them easy to trade and price.

• Wallet Support: ERC-20 is supported everywhere—MetaMask, Coinbase Wallet, Uniswap.

• Liquidity: Paragraph coins can be instantly swapped for ETH or USDC on decentralised exchanges.

• Community Alignment: ERC-20 tokens fit perfectly with the idea of building a shared economy around writing.

Imagine this: A writer publishes an essay on Paragraph. Instantly, coins are minted. Early supporters buy in at $1. As more people join, demand rises, and the coin’s value increases. The writer earns, the readers benefit, and the community grows—all thanks to ERC-20.

💡 Mini Story: A climate journalist launches a series. Readers buy her Paragraph coins at launch. Months later, as her reputation grows, her coins are worth five times more. Early supporters aren’t just fans—they’re partners who saw both intellectual and financial returns.

This is only possible because ERC-20 tokens are universally recognised, tradable, and programmable.

ERC-20 isn’t just a technical standard. It is the alphabet of Ethereum, the set of building blocks from which entire economies are written.

It enabled the ICO boom, the rise of DeFi, and now, the birth of creator coins on platforms like Paragraph.xyz.

Without ERC-20, the dream of turning an essay into a tradable asset, of transforming readers into stakeholders, would not exist. With it, we enter a new age of publishing—one where writers don’t just produce content, but mint tokens that become the backbone of their communities.

The story of Paragraph coins is inseparable from the story of ERC-20. To understand one is to understand the other. And this is why ERC-20 is not just a technical background—it’s the very foundation on which the future of writing is being built.

“Support this journey into Web3 publishing! 🚀✨ Subscribe today to stay updated as we uncover how ERC-20 tokens empower writers, creators, and readers to own their communities and build lasting value.”