Launching an ERC-20 token isn’t “deploy contract, tweet, done.” Mainnet is adversarial, integrations are picky, and mistakes become permanent. Below is a pragmatic checklist we use at ChainMagic Studio to take a token from idea to a production-grade launch.
1) Define the token model (before you write Solidity)
Start with decisions that cannot be patched later without breaking trust.
- Token purpose: governance, utility, payments, staking, revenue share (be careful), or points-to-token migration.
- Supply plan: fixed vs. mintable. If mintable, define a credible mint policy (caps, timelocks, roles).
- Allocations & vesting: team, investors, treasury, ecosystem. Vesting should be on-chain (or provably enforced).
- Transfer rules: fully transferable, trading start time, allowlists/denylists. If you add restrictions, expect exchange and DeFi friction.
- Decimals & units: most use 18. Non-18 can break some integrations.
Opinionated take: if you don’t need minting, don’t ship minting. Immutable fixed-supply tokens are easier to reason about, easier to audit, and easier to integrate.
2) Choose a battle-tested implementation (avoid novelty)
Use OpenZeppelin contracts unless you have a strong reason not to.
Baseline choices:
ERC20 + ERC20Permit (gasless approvals via EIP-2612)Ownable only if ownership will be renounced or handed to a timelock/multisigAccessControl if you need multiple roles (minting, pausing, upgrades)
If you’re considering:
- Upgradeable proxies: only if you truly need upgrades (e.g., complex logic, long-lived protocol token). They add risk and operational burden.
- Pausable: good for early incident response, but it’s a centralization lever. Document when/why it can be used.
3) Lock down admin and key management
Most token “hacks” are admin/key failures.
Checklist:
- Multisig (Safe): set up a 2/3 or 3/5 Safe for admin actions.
- Timelock: for sensitive actions (minting, parameter changes). Even 12–48 hours reduces governance drama and improves trust.
- Role minimization: only grant roles that are required; avoid “god mode.”
- Key ceremony: hardware wallets, separated signers, written runbooks, backup procedures.
Practical standard: deploy with a deployer EOA, immediately transfer ownership/roles to Safe + timelock, then revoke deployer privileges.
4) Engineer token distribution and vesting on-chain
Avoid manual token drips. Automate.
Common patterns:
- Vesting wallets: OpenZeppelin
VestingWallet for team allocations.
- Merkle airdrops/claims: publish a Merkle root, let users claim. This reduces gas and ops load.
- Treasury controls: treasury allocation held by a Safe, not an EOA.
Do a dry run on a fork to validate:
- exact amounts minted/transferred
- vesting cliff and duration correctness
- claim logic and edge cases (double-claims, rounding)
5) Test like mainnet is trying to hurt you
Unit tests are table stakes. Add adversarial testing.
- Fuzzing/property tests: invariants like “totalSupply never exceeds cap,” “balances conserve,” “no one can mint without role.”
- Fork testing: simulate Ethereum mainnet state and run the exact deployment and distribution script.
- Gas profiling: ensure transfers and claims aren’t prohibitively expensive.
- Static analysis: Slither, Mythril, Foundry’s tools.
If you’re building hooks (fees, rebasing, reflection), budget extra time—these are integration landmines for exchanges and DeFi.
6) Get an audit—and make it count
Audits are not magic. You want:
- a clear threat model
- coverage of privileged roles and deployment scripts
- review of tokenomics-critical logic (mint, burn, pause, restrictions)
Audit checklist:
- freeze features before audit (no “just one more change”)
- produce a concise spec (what the contract should do)
- remediate findings and request a re-review
- publish the report and remediation notes
If budget is tight, do a phased approach: internal review + automated tooling + smaller audit first, then a full audit before major liquidity.
7) Prepare a production deployment plan
Deployment is an engineering project.
- Tooling: Foundry or Hardhat scripts with deterministic outputs.
- Network config: correct chain IDs, RPC endpoints, Etherscan API.
- Nonce and signer control: avoid “oops” deployments from the wrong account.
- Address book: track all deployed addresses, roles, and config in version control.
Pro tip: do at least one full dress rehearsal on Sepolia and one on a mainnet fork with your final scripts.
8) Deploy to mainnet and verify everything
Mainnet checklist:
- deploy token contract
- set roles/ownership to Safe/timelock
- if mintable: mint initial allocations as per plan
- set any trading start parameters (if applicable)
- verify source code on Etherscan (and publish contract metadata)
- tag the release commit and archive deployment artifacts
Verification matters because:
- integrators and explorers rely on it
- auditors and community can review it
- it reduces “scam token” suspicion
9) Liquidity, pricing, and launch mechanics
How trading starts is where many launches get messy.
Decide upfront:
- DEX venue: Uniswap v3/v4 on Ethereum mainnet is common, but consider L2s if your community is cost-sensitive.
- Initial liquidity source: treasury, market maker, or liquidity bootstrapping.
- Anti-MEV approach: fair launch mechanics, consider measures like delayed trading, or using reputable launch platforms.
Concrete example: if you seed a Uniswap v3 pool, choose your fee tier and initial price carefully—bad initial ranges lead to immediate price instability and toxic flow.
Also prepare:
- token logo and metadata for common UIs
- public docs for contract address, decimals, and supply
10) Exchange and wallet readiness (even if you’re DEX-first)
Integrations can take weeks.
- CEX listing packet (optional): contract, audit, tokenomics, admin controls, legal contacts.
- Wallet trackers: submit to Etherscan token info, CoinGecko/CMC (they have review processes).
- Block explorers: ensure correct name/symbol, verify contract, publish ABI.
If your token has transfer restrictions or fees, many centralized venues will balk. Simpler ERC-20s get adopted faster.
11) Monitoring, incident response, and post-launch ops
Post-launch is where professionalism shows.
- On-chain monitoring: alerts for role changes, large transfers, mint events, liquidity removals.
- Runbooks: how to pause (if you can), how to communicate, who signs transactions.
- Treasury reporting: periodic, transparent updates.
- Community comms: publish a “known addresses” list (treasury, vesting, LP) to reduce misinformation.
If you retain admin controls, be explicit about them. Ambiguity damages trust more than centralization does.
Conclusion: a mainnet token launch is a system launch
An ERC-20 token is easy to deploy and hard to launch well. The winning approach is boring engineering: minimize privileged functionality, rely on proven libraries, rehearse deployments, document everything, and treat liquidity and integrations as first-class deliverables.
If you want a sanity check, the simplest heuristic is this: could a skeptical integrator understand your token’s rules and risks in 10 minutes by reading your docs and Etherscan page? If not, you’re not ready for mainnet.