/// @notice this is the address that permanently locked initial liquidity for markets is held by.
/// These tokens will never move so market can never have zero liquidity on a side.
/// @dev f10a7 spells float in hex - for fun - important part is that the private key for this address in not known.
address public constant PERMANENT_INITIAL_LIQUIDITY_HOLDER = 0xf10A7_F10A7_f10A7_F10a7_F10A7_f10a7_F10A7_f10a7;


function _seedMarketInitially(uint256 initialMarketSeedForEachMarketSide, uint32 marketIndex) internal
...
  ISyntheticToken(syntheticTokens[latestMarket][true]).mint(PERMANENT_INITIAL_LIQUIDITY_HOLDER,initialMarketSeedForEachMarketSide);
  ISyntheticToken(syntheticTokens[latestMarket][false]).mint(PERMANENT_INITIAL_LIQUIDITY_HOLDER, initialMarketSeedForEachMarketSide);
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
  if (recipient == longShort && msg.sender == longShort) {   // sender could be any address
    super._transfer(sender, recipient, amount);
    return true;
  } else {
    return super.transferFrom(sender, recipient, amount);
  }
}
if (recipient == longShort && msg.sender == longShort && sender!=PERMANENT_INITIAL_LIQUIDITY_HOLDER)
