Read Token Launchpad free: the opening pages

Foundations: Know What You Are Putting On-Chain

You have probably seen it happen. Someone in a group chat posts a contract address, a frog or a dog or a hat-wearing cat on a logo, and within hours the chart is doing something wild. Then you look closer and wonder: how hard is this, really? You can write some JavaScript or Python. You have used a terminal. You suspect that launching a token is mostly a few commands and a bit of courage, and you are partly right. The commands are the easy part. The hard part is knowing what you are actually putting on a public blockchain forever, who will read it, and what they will assume about you from what they find.

This guide is for you if you want to build the thing yourself, understand every line, and ship it without becoming the person whose token gets flagged as a scam in the first ten minutes. We will start with what a token actually is, because almost every mistake later in the process comes from a fuzzy picture here.

A token is a ledger inside a contract

Forget the logo for a moment. A token on Ethereum or Base is a smart contract: a small program deployed at an address, holding a table of balances. That table maps addresses to numbers. When someone "sends" you a token, nothing moves between wallets. The contract updates two rows in its own table: their number goes down, yours goes up.

That is the whole trick. Your wallet does not contain tokens. Your wallet holds a private key that lets you ask the token contract to change your row. Wallet apps display your balance by calling the contract and asking "what is the number for this address?"

This matters for three practical reasons:

1. The contract is the source of truth. Whatever the code says, happens. If the code includes a function that lets the owner freeze your row, the owner can freeze your row, regardless of what the website promises.
2. The code is public. Once verified (we will do that in Chapter 5), anyone can read every function. Buyers and automated scanners will.
3. Deployed code is permanent. You cannot patch a deployed contract unless you built in upgrade machinery, and upgrade machinery is itself something buyers distrust in a meme coin.

Pro tip: When you explain your project to anyone, describe it as "a contract that keeps a balance table and lets holders transfer their balances." If your description needs more words than that, every extra word is a feature a skeptical buyer will want to inspect.

What ERC-20 actually standardizes

If every token invented its own function names, every wallet and exchange would need custom code for every token. ERC-20 solves that. It is a standard published as an Ethereum Improvement Proposal that defines a fixed set of functions and events. If your contract implements them with the expected behavior, every wallet, block explorer and decentralized exchange already knows how to talk to it.

The standard surface is small:

Technically name, symbol and decimals are optional in the original text, but in practice every token implements them and tooling expects them.

The approve and transferFrom pair is the part newcomers skip and later regret skipping. A decentralized exchange cannot reach into your wallet. Instead, you approve the exchange's router contract to spend some of your tokens, and then the router calls transferFrom during a swap. Every DEX trade of your token will use this path, so it must behave exactly as the standard expects. We will go through it line by line in Chapter 2.

Meme coin is a marketing word, not a technical one

There is no "meme coin" standard. Technically a meme coin is just an ERC-20 token whose value proposition is cultural rather than functional: a joke, a community, a mascot. There is no product revenue behind it, no protocol fees, no claim on anything.

That honesty is actually the cleanest version of the thing. A token that says "this is a collectible joke with no utility and no promises" is easier to defend, easier to build and easier to explain than a token that claims it will become a platform, pay dividends or fund a roadmap. You will see in Chapter 7 that the moment you promise profits or ongoing work that makes the token more valuable, you start sliding toward securities law territory.

From a code perspective, the best meme coin contract is boring. It is a standard ERC-20 with a fixed supply, no owner powers and no special transfer rules. Everything that makes it fun lives off-chain: the art, the community, the jokes. Everything on-chain should be dull and predictable.

Example: Two hypothetical founders, Priya and Tom, both launch frog tokens on the same day. Priya's contract is forty lines: fixed supply, no owner, verified source. Tom's contract has a 5 percent "marketing tax," a function to exclude wallets from fees, and an owner-controlled max wallet size. Tom genuinely meant well. Within minutes, scanners flag Tom's token as modifiable tax and owner-controlled restrictions. Experienced buyers skip it. Priya's token gets a clean scan. Neither has a better meme. One simply gave buyers less to fear.

Ethereum mainnet versus Base

You will deploy the exact same contract code to either chain. The differences are about cost, audience and infrastructure, not about Solidity.

Ethereum mainnet is the base layer. It is the most decentralized and most established environment, with the deepest liquidity and the longest track record. It is also the most expensive place to transact. Gas prices rise and fall with demand, and a busy period can make deployment and liquidity provision meaningfully costly.

Base is a layer 2 network built on the OP Stack and incubated by Coinbase. It processes transactions off the main chain and posts compressed data back to Ethereum for security. For you, that means the same EVM, the same Solidity, the same tooling, and much lower fees in typical conditions. Base uses ETH for gas, so you need ETH bridged to Base rather than a separate gas token.

That last row deserves a sentence. Layer 2 networks currently rely on a sequencer that orders transactions. Base has published its progress on decentralization over time, and the trust assumptions differ from mainnet. For a meme coin, this rarely changes your decision, but you should understand that "on Base" and "on Ethereum" are not identical security claims.

What happens when you deploy

Deploying a contract is a transaction with no recipient. Its data field contains your compiled bytecode plus any constructor arguments. The network runs the constructor once, stores the resulting runtime code at a new address, and that address becomes your token.

The new address is derived from your deployer address and its transaction count (the nonce), so it is not random. Practically, this means:

1. If you deploy from a fresh wallet, the first contract that wallet deploys always lands at the same predictable address. Some founders use this to know their token address before launch. It also means anyone watching your deployer can predict it too.
2. The constructor runs exactly once. Any setup you need, such as minting the full supply, must happen there.
3. After deployment, the contract's code is fixed. Only state (balances, allowances) changes.

Warning: Deployment is irreversible. If you deploy with the wrong name, wrong symbol or wrong supply, you cannot edit it. You can only deploy a new contract at a new address, and the old one stays visible on the explorer forever. This is why Chapter 4 makes you rehearse the entire launch on a testnet first.

The full path from idea to tradable token

It helps to see the whole route before taking the first step. Here is the sequence this guide follows, with the chapter where each happens:

1. Decide what you are launching, on which chain, with what supply and distribution (Chapter 1).
2. Set up a development environment and a safe wallet structure (Chapter 1).
3. Write a minimal ERC-20 using OpenZeppelin's audited contracts (Chapter 2).
4. Remove anything that looks like a honeypot pattern and settle the ownership question (Chapter 3).
5. Test with unit tests, fuzzing, static analysis and a full testnet rehearsal (Chapter 4).
6. Review against a security checklist, estimate gas and deploy to mainnet or Base (Chapter 5).
7. Verify the source code on the block explorer so anyone can read it (Chapter 5).
8. Add liquidity on a DEX and lock or burn the LP position (Chapter 6).
9. Publish token information and pursue listings honestly (Chapter 6).
10. Stay legal: understand securities questions, market conduct rules, disclosures and taxes, and talk to a lawyer (Chapter 7).

Notice that writing the contract is step three of ten. Founders who treat the contract as the whole project tend to skip steps four through seven, and those are precisely the steps that protect buyers and protect you.

What a buyer sees in the first five minutes

It is worth knowing your audience before you write a line. When someone finds a new token, a typical due diligence pass looks something like this:

1. Paste the address into a block explorer and check whether the source code is verified.
2. Run it through one or more automated token scanners that look for risky functions.
3. Check who holds the supply: is one wallet sitting on most of it?
4. Check the liquidity: how much is in the pool, and is the LP position locked or burned?
5. Check the owner: is there one, and has ownership been renounced?
6. Try a tiny buy and sell, or use a simulator that does it for them.

Every one of those checks reads something you control. The contract you write, whether you verify it, how you distribute supply, what you do with LP. You are not trying to "pass" these checks with tricks. You are trying to build something that has nothing to hide, so the checks simply confirm it.

Action step: Before moving on, pick any established ERC-20 token, open it on Etherscan, and click the "Contract" tab. Find the transfer function in the verified source. Then open the "Read Contract" tab and call totalSupply and decimals. You have just done the first two steps of buyer due diligence, and you now know what your own token page will look like.

Units, decimals and the 10 to the 18th problem

One last foundational idea, because it trips up nearly everyone once. Contracts do not store fractional numbers. A token with 18 decimals stores "1 token" as the integer 1,000,000,000,000,000,000 (one followed by eighteen zeros). Wallets divide by ten to the eighteenth power for display.

So if you want a supply of one billion tokens, the contract must mint one billion times ten to the eighteenth units. In Solidity you will write it as 1_000_000_000 * 10 ** 18, or more commonly 1_000_000_000 * 10 ** decimals(). Forget the multiplier and you will mint one billion of the smallest unit, which displays as 0.000000001 tokens in every wallet. People really do deploy this mistake to mainnet.

Keep 18 decimals unless you have a strong reason not to. It is the default in OpenZeppelin, it matches ETH, and every tool assumes it. Changing it adds risk and buys you nothing for a meme coin.

With the mental model in place (a balance table, a standard interface, a permanent deployment, a skeptical audience), you are ready to make the decisions that come before code. That is where the next section goes.

The sample ends here.