Appendix C – Smart Contract Code Snippets

This appendix provides illustrative examples of the smart contracts powering core functions within the Invincible Read ecosystem. These contracts are written in Solidity and audited by external security firms. Full code repositories are available on our GitHub and are regularly updated in tandem with platform upgrades.

⚠️ Disclaimer: The following code snippets are simplified for readability and do not represent production deployments. Refer to the latest GitHub repository for audited implementations.

1. Token Vesting Contract

pragma solidity ^0.8.0;

contract ReadTokenVesting {

IERC20 public token;

address public beneficiary;

uint256 public start;

uint256 public duration;

uint256 public released;

constructor(

address _token,

address _beneficiary,

uint256 _start,

uint256 _duration

) {

token = IERC20(_token);

beneficiary = _beneficiary;

start = _start;

duration = _duration;

}

function releasableAmount() public view returns (uint256) {

uint256 timeElapsed = block.timestamp - start;

if (timeElapsed >= duration) return token.balanceOf(address(this));

return (token.balanceOf(address(this)) * timeElapsed) / duration;

}

function release() public {

uint256 unreleased = releasableAmount() - released;

released += unreleased;

token.transfer(beneficiary, unreleased);

}

}

2. Read-to-Earn Distribution Contract

contract ReadToEarn {

IERC20 public readToken;

mapping(address => uint256) public userRewards;

event RewardClaimed(address indexed user, uint256 amount);

constructor(address _token) {

readToken = IERC20(_token);

}

function updateUserReward(address user, uint256 chaptersRead) external {

// Reward logic, simplified

userRewards[user] += chaptersRead * 1e18; // 1 $READ per chapter

}

function claimReward() external {

uint256 reward = userRewards[msg.sender];

require(reward > 0, "No rewards available");

userRewards[msg.sender] = 0;

readToken.transfer(msg.sender, reward);

emit RewardClaimed(msg.sender, reward);

}

}

3. UCNS Minting and Licensing Contract (Simplified)

contract UCNSRegistry {

struct Content {

address author;

string metadataURI;

uint256 licensePrice;

}

mapping(uint256 => Content) public contents;

uint256 public nextId;

function registerContent(string memory _uri, uint256 _licensePrice) public {

contents[nextId] = Content(msg.sender, _uri, _licensePrice);

nextId++;

}

function purchaseLicense(uint256 contentId) public payable {

Content storage c = contents[contentId];

require(msg.value >= c.licensePrice, "Insufficient payment");

payable(c.author).transfer(msg.value);

}

}