BlockSigmaBase.sol

contract BlockSigmaBase is StandardToken {

  /**
  * @dev Constructor
  * @param _underlyingTokenAddress address of the underlying ERC20 token.
  * @param _currencyTokenAddress address of the currency ERC20 token.
  * @param _strike option strike denominated in the currency token.
  * @param _exp expiration timestamp.
  * @param _minReserve minimum (excess) reserve 
  * @param _underlyingBancorConverter address of the Bancor converter contract that converts underlying token into BNT.
  * @param _currencyBancorConverter address of the Bancor converter contract that converts currency token into BNT.
  * @param _issuer address that is allowed to issue(underwrite) new contracts.
  */   
  function BlockSigmaBase(address _underlyingTokenAddress, address _currencyTokenAddress,
          uint256 _strike, uint256 _exp, uint256 _minReserve,
          address _underlyingBancorConverter, address _currencyBancorConverter,
          address _issuer) public;

  /**
  * @dev get the required maintenance margin level in currency token.
  */ 
  function getRequiredReserve() public view returns (uint256);

  /**
  * @dev Get price of the underlying token expressed in currency token from Bancor
  */    
  function getUnderlyingPrice() public view returns (uint256);

  /**
  * @dev Ability for writer to issue(underwrite) new contracts    
  * @param amount how many contracts to issue (in wei).
  */    
  function issue(uint256 amount) public onlyIssuer returns (bool);
  
  /**
  * @dev Buyer can exercise the option anytime before the maturity. Buyer deposits currency(call) or underlying tokens(put).
  */    
  function exercise() public returns (bool);
  
  /**
  * @dev Writer delivers the underlying tokens(call) or currency(put).
  * @param to which buyer to deliver to.
  */    
  function deliver(address to) public onlyIssuer returns (bool);  
  
  /**
  * @dev Buyer can force liquidation if exercise is past due or reserve is below requirement
  */ 
  function forceLiquidate() public returns (bool);

  /**
  * @dev Writer can deposit additional reserve
  * @param amount how much currency token to deposit.
  */    
  function depositReserve(uint256 amount) public returns (bool);
  
  /**
  * @dev Writer can withdraw reserve
  * @param amount how much currency token to withdraw.
  */    
  function withdrawReserve(uint256 amount) public onlyIssuer returns (bool);
  
  /**
  * @dev Is reserve below the requirement?
  */    
  function isReserveLow() public view returns (bool);  
  
  /**
  * @dev Is option series expired?
  */     
  function isExpired() public view returns (bool);
  
  
  /**
  * @dev Can option be liquidated?
  */    
  function canLiquidate() public view returns (bool);
}