How to Create ETH ERC20 Tokens: Mintable vs Fixed Supply Tokens

Understanding ERC20 Token Types on Ethereum

The Ethereum blockchain enables two primary types of ERC20 token implementations:

1️⃣ Fixed Supply ERC20 Tokens

Permanent, unchangeable total supply
No minting capability after deployment
Ideal for cryptocurrencies with capped supplies like Bitcoin-style models

2️⃣ Mintable ERC20 Tokens

Flexible total supply that can increase over time
Includes special minting functionality in the smart contract
Critical features:
- Minting authority resides with token creator by default
- Minting rights can be transferred between addresses
- Minting capability can be permanently revoked (converting to fixed supply)

Step-by-Step Token Creation Process

Required Information

Token full name
Token symbol (3-5 characters)
Initial supply quantity
Token type selection (fixed or mintable)

Deployment Methods

Platform-Managed Deployment
We handle creation using our address while assigning ownership to your specified wallet
Client-Managed Deployment
Requires providing your wallet's private key for direct control

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Deep Dive: ERC20 Token Standard

Core Technical Specifications

The ERC20 standard defines these mandatory functions:

Function	Purpose
`totalSupply()`	Returns total token supply
`balanceOf()`	Checks address balance
`transfer()`	Sends tokens to address
`transferFrom()`	Approved third-party transfers
`approve()`	Grants spending allowance
`allowance()`	Checks remaining allowance

Key Events

Transfer - Triggered on token movements
Approval - Logs delegation approvals

Mintable Token Extensions

Special functions enable supply management:

function mint(address to, uint256 value) public onlyMinter returns(bool)

Minting Authority Management

Privilege Hierarchy

Initial minter: Contract deployer address
Current minters can:
- Add new minters (addMinter)
- Renounce rights (renounceMinter)
- Transfer privileges (transferMinterRole)

Permission Events

MinterAdded - New minting address authorized
MinterRemoved - Address loses minting rights

Real-World ERC20 Examples

Token	Use Case
BNB	Binance exchange fee discounts
MKR	DAI stablecoin governance
OMG	Plasma network transactions
BAT	Digital advertising rewards

FAQ: ERC20 Token Creation

What's the difference between ERC20 and BEP20?

While both are token standards, ERC20 operates on Ethereum whereas BEP20 functions on Binance Smart Chain with different gas fee structures.

Can I convert a mintable token to fixed supply?

Yes, by revoking all minting privileges through renounceMinter(), the token becomes permanently fixed.

How much ETH is needed for deployment?

Gas fees vary by network congestion, but budget 0.05-0.2 ETH for standard deployments. Complex contracts may require more.

👉 Explore advanced token customization options including burn mechanisms and staking features.

Best Practices for Token Economics

Clearly document minting policies
Implement multi-signature controls for mintable tokens
Establish transparent governance for supply decisions
Consider gradual minting schedules rather than unlimited supply

Security Considerations

Never share private keys with untrusted parties
Audit smart contracts before mainnet deployment
Use hardware wallets for minting authority addresses
Monitor for unauthorized minting attempts

By understanding these ERC20 fundamentals, you're equipped to create tokens tailored to your project's specific needs—whether requiring the stability of fixed supplies or the flexibility of mintable tokens.