> For the complete documentation index, see [llms.txt](https://docs.fantom.foundation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fantom.foundation/build-on-opera/tutorials/create-variable-cap-asset.md).

# Create Variable-Cap Asset

Variable-cap assets are fungible tokens for which additional quantities can be minted after creation. 

## Create the Asset

1. Write the token smart contract:
   1. <https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol>
   2. Functions
      1. name()
      2. symbol()
      3. decimals()
      4. totalSupply()
      5. balanceOf(account)
      6. transfer(recipient, amount)
      7. allowance(owner, spender)
      8. approve(spender, amount)
      9. transferFrom(sender, recipient, amount)
      10. increaseAllowance(spender, addedValue)
      11. decreaseAllowance(spender, subtractedValue)
      12. \_transfer(sender, recipient, amount)
      13. \_mint(account, amount)
      14. \_burn(account, amount)
      15. \_approve(owner, spender, amount)
      16. \_setupDecimals(decimals\_)
2. Compile your code into bytecode
3. Deploy your Variable-cap Asset by sending your code in a transaction to the Fantom network
4. Navigate to [the Explorer](https://explorer.fantom.network) to check that your token has been created
5. You can use the `_mint` function to create additional units of the token

{% hint style="info" %}

This contract is designed to be unopinionated, allowing developers to access the internal functions in ERC-20 (such as [\_mint](https://docs.openzeppelin.com/contracts/3.x/api/token/erc20#ERC20-_mint-address-uint256-)) and expose them as external functions in the way they prefer. On the other hand, [ERC-20 Presets](https://docs.openzeppelin.com/contracts/3.x/erc20#Presets) (such as [ERC-20PresetMinterPauser](https://docs.openzeppelin.com/contracts/3.x/api/presets#ERC20PresetMinterPauser)) are designed using opinionated patterns to provide developers with ready to use, deployable contracts.
{% endhint %}

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