TECNOLOGÍA PARA TOKENIZAR.
REGISTROS PARA VERIFICAR.

// Dual Layer Token: dos capas de identificadores
interface IDLT {
  event Transfer(address indexed sender, address indexed recipient,
    uint256 indexed mainId, uint256 subId, uint256 amount);

  function safeTransferFrom(address sender, address recipient,
    uint256 mainId, uint256 subId, uint256 amount,
    bytes calldata data) external returns (bool);

  function approve(address spender, uint256 mainId,
    uint256 subId, uint256 amount) external returns (bool);

  function subBalanceOf(address account, uint256 mainId,
    uint256 subId) external view returns (uint256);
}

function invest(uint256 mainId, uint256 subId, uint256 amount) external {
  Raise storage r = raises[mainId][subId];
  require(block.timestamp < r.deadline, "Ronda cerrada");
  uint256 fee = amount * DEPOSIT_FEE_BPS / 10_000; // tasa definida en las condiciones
  uint256 net = amount - fee;
  require(r.raised + net <= r.hardCap, "Hard cap alcanzado");

  usdc.transferFrom(msg.sender, address(this), amount);
  paid[mainId][subId][msg.sender] += amount; // incluye el fee
  r.raised += net;
  token.mint(msg.sender, mainId, subId, net);
}

function markLive(uint256 mainId, uint256 subId) external onlyOperatorAndOracle {
  Raise storage r = raises[mainId][subId];
  require(r.closed, "Ronda abierta");
  r.liveAt = block.timestamp;           // desde aquí puede haber distribuciones
  emit WentLive(mainId, subId, block.timestamp, r.goLiveBy);
}

function isDelayed(uint256 mainId, uint256 subId) public view returns (bool) {
  Raise storage r = raises[mainId][subId];
  return r.liveAt == 0 && block.timestamp > r.goLiveBy + 90 days;
}

function refund(uint256 mainId, uint256 subId) external {
  Raise storage r = raises[mainId][subId];
  require(block.timestamp >= r.deadline && r.raised < r.softCap, "Sin reembolso");
  uint256 back = paid[mainId][subId][msg.sender];
  paid[mainId][subId][msg.sender] = 0;
  token.burn(msg.sender, mainId, subId, token.subBalanceOf(msg.sender, mainId, subId));
  usdc.transfer(msg.sender, back); // 100 %, fee incluido
}