Mint Precompile

A custom precompile for minting native tokens.

Overview

The mint precompile allows authorized addresses to mint native tokens (ETH equivalent) directly. This enables:

• Bridge minting (mint when assets are bridged in)
• Inflation schedules
• Programmatic rewards
• Airdrops

Configuration

In your chainspec (genesis.json):

{
  "config": {
    "evolve": {
      "mintPrecompile": {
        "admin": "0xMINT_ADMIN_ADDRESS",
        "address": "0x0000000000000000000000000000000000000100"
      }
    }
  }
}

Field	Description
admin	Address authorized to call mint
address	Precompile address (conventionally 0x100)

Interface

interface IMintPrecompile {
    // Mint native tokens to recipient
    function mint(address recipient, uint256 amount) external;
}

Usage

From an authorized contract:

contract Bridge {
    IMintPrecompile constant MINT = IMintPrecompile(0x0000000000000000000000000000000000000100);

    function bridgeIn(address recipient, uint256 amount) external {
        // Verify bridge proof...

        // Mint native tokens
        MINT.mint(recipient, amount);
    }
}

Security

• Only the admin address can call mint()
• Calls from other addresses revert
• The admin is typically a bridge contract or multisig

Changing Admin

The admin cannot be changed after genesis. To update, you would need a chain upgrade with a new chainspec.

Example: Bridge Setup

{
  "config": {
    "evolve": {
      "mintPrecompile": {
        "admin": "0xBridgeContractAddress",
        "address": "0x0000000000000000000000000000000000000100"
      }
    }
  }
}

The bridge contract can mint tokens when users bridge assets from another chain.