What is the ERC-20 token standard?

ERC-20 is Ethereum's fungible token standard. It defines six required functions — totalSupply, balanceOf, transfer, approve, transferFrom, allowance — that every wallet and DEX knows how to call. SHIB, PEPE, FLOKI, and nearly every Ethereum meme coin are ERC-20 tokens.

How much are Ethereum gas fees for launching a token?

Far less than it used to. After the Dencun, Pectra and Fusaka upgrades, mainnet base fees normally sit well under 1 gwei — a plain ERC-20 deployment costs under a dollar in normal conditions and a Uniswap swap costs cents. Ethereum is still the chain where fees spike hardest when the block space gets contested, so check Etherscan Gas Tracker before you sign anything. L2s (Base, Arbitrum, Optimism) are cheaper again, but gas by itself is no longer a reason to skip mainnet.

How can I avoid smart contract vulnerabilities?

Don't write the contract from scratch. Start from OpenZeppelin templates — they're the most audited ERC-20 code on the planet. Before mainnet: test on a public testnet (Sepolia, or whichever has replaced it), get an audit if you're raising real money, verify source on Etherscan, renounce ownership, and lock LP. The classic bugs are reentrancy, hidden mint functions, and honeypot transfer restrictions.

Should I launch on Ethereum mainnet or a Layer 2?

Mainnet buys you the deepest liquidity, the most credibility, and institutional access — and since Fusaka a one-off deployment barely costs more than it would on an L2. L2s (Base, Arbitrum, Optimism) inherit Ethereum's security and stay cheaper for high-frequency trading thanks to blob fees, and they ride out mainnet congestion better. For meme coins, Base is still the best-connected L2 because of the direct line to Coinbase, though most launch volume now happens on Solana and BNB Chain.

Chain Deep Dive

Ethereum Meme Coin Guide

Shipping a meme coin on Ethereum — ERC-20, what the gas actually costs, how to list on Uniswap, and when you should just use an L2.

Why Ethereum for Meme Coins?

Ethereum is the original smart contract platform, and the one institutions actually touch. Gas used to be the price of admission; after Dencun, Pectra and Fusaka a swap costs cents in normal conditions. What launching here buys you is credibility, depth, and the largest holder base in crypto.

Most-Audited Chain

Over a decade of adversarial pressure on the same base layer. No chain-level exploit has landed. Your contract is the weak point — not Ethereum.

Deepest Liquidity

Billions of dollars in Uniswap and Curve pools. SHIB, PEPE, MOG, SPX — the big ERC-20 meme coins all launched here and still trade here.

The trade-off: Ethereum is cheap when the chain is calm and it is still the chain where fees spike hardest when it isn't — mainnet prices congestion before anywhere else does. The other trade-off is attention: new meme coin launches and their liquidity have moved to Solana and BNB Chain, so mainnet buys you depth and credibility rather than flow.

ERC-20 Token Standard

ERC-20 is the interface every Ethereum wallet, DEX, and explorer agrees on. Six function signatures, nothing exotic. Your meme coin is an ERC-20 token — which is why it works in MetaMask out of the box.

Required ERC-20 Functions

totalSupply() → uint256

balanceOf(address) → uint256

transfer(address, uint256) → bool

approve(address, uint256) → bool

transferFrom(address, address, uint256) → bool

allowance(address, address) → uint256

Popular ERC-20 Meme Coins

• Shiba Inu (SHIB) - The second-biggest meme coin after DOGE. Launched 2020 as a self-styled "Dogecoin killer." Built out its own L2 (Shibarium) and DeFi stack.
• Pepe (PEPE) - Quiet April 2023 launch, 7,000% in its first month, and a peak above $11B at the December 2024 top. Still the largest ERC-20 meme coin after SHIB.
• Mog Coin (MOG) - Joy cat meme with pit viper sunglasses. Culture-heavy community, Ethereum-native.
• SPX6900 (SPX) - Parody of the S&P 500, with a cult community that behaves like one. Bridged via Wormhole to Solana, Base, and Avalanche, but the deepest on-chain pool is still Uniswap on Ethereum.
• FLOKI - Named after Elon Musk's Shiba Inu. Built out its own ecosystem (CEX listings, metaverse, the works).
• HarryPotterObamaSonic10Inu - HarryPotterObamaSonic10Inu. The name is the joke.
• Non-Playable Coin (NPC) - Token for the NPC meme. Deliberately unserious.
• Rekt (REKT) - Meme token about getting rekt. Self-aware.

Gas Optimization Strategies

Gas is no longer the wall it used to be, but it is still the one cost you control — and the first thing to move when the chain gets busy. Three ways to pay less:

1. Deploy in quiet windows

Weekend UTC mornings are still the cheapest window, for what it is worth. Gas tracker is at etherscan.io/gastracker — base fees normally sit under 1 gwei, so the only thing worth waiting out is a congestion spike into double digits.

2. Keep the contract boring

Every extra modifier, hook, and storage slot costs gas at deploy. Use OpenZeppelin ERC-20 as-is, skip the reflection/tax meta, and you'll deploy for a fraction of what a custom contract costs.

3. Use an L2

Base, Arbitrum, and Optimism settle to Ethereum and inherit its security. Blob fees — cheap since Dencun, cheaper again after Pectra and Fusaka's PeerDAS — keep L2 swaps at a fraction of a cent, and L2s shrug off mainnet congestion. Base is the best-connected of the three thanks to Coinbase, though outright meme coin launch volume mostly sits on Solana and BNB Chain.

Listing on Uniswap

Uniswap is where Ethereum meme coins go to trade. Any serious launch seeds liquidity here first.

Uniswap Listing Steps

Deploy ERC-20 Contract

Deploy the contract, then verify the source on Etherscan so holders can read the code.

Add Liquidity on Uniswap

Pair against ETH or USDC. v4 has been the default since January 2025, but v2 and v3 pools still trade and the router prices across all three. Plan for $5-10k minimum — thinner pools get sandwiched.

Lock Liquidity

Lock the liquidity with UNCX Network (formerly Unicrypt) or Team Finance. On v2 that is an LP token; on v3 and v4 the position is an NFT, so you lock the NFT. A public lock is the difference between "trustworthy launch" and "obvious rug."

Live on Uniswap

Token is tradable. Share the Etherscan + Uniswap links — not a Telegram invite.

Smart Contract Security

Smart contract bugs don't refund you. If you're launching real money through a contract, every item below is non-negotiable. Broader investor-side risk playbook lives in our risk management guide.

Critical Security Checklist

✓ Audit from a known firm if you're touching >$100k — CertiK, Trail of Bits, OpenZeppelin audits.
✓ Start from OpenZeppelin ERC-20 contracts. Don't hand-roll token math.
✓ Renounce ownership on-chain after launch. No takesies-backsies.
✓ Lock LP for 1+ year with UNCX Network or Team Finance. Unlocked LP is a red flag.
✓ Verify source on Etherscan. Unverified contracts don't get trust.
✓ Full dry run on the current public testnet — Sepolia today, its successor once Sepolia retires. Gas previews lie about logic bugs.

Common Smart Contract Vulnerabilities

Reentrancy Attacks: Another contract calls back into yours before state finishes updating, and drains the pool. The DAO hack in 2016 was this. Use checks-effects-interactions and wrap with OpenZeppelin's ReentrancyGuard.

Honeypot Contracts: You can buy. You can't sell. Hidden restrictions in the transfer function block exits to everyone except the deployer. If the contract isn't verified on Etherscan, assume honeypot until proven otherwise.

Hidden Mint Functions: Owner mints unlimited tokens and dumps on the pool. Read the contract — if `mint()` still exists and ownership isn't renounced, the supply is whatever the dev wants it to be.

Proxy Contract Risks: Upgradeable proxy patterns let the owner swap the contract logic later. Useful for DeFi. Terrible for meme coins — it means the code you audited today might not be the code running tomorrow. Ship immutable, renounce ownership, and you remove the attack surface entirely.