interface IWCHI is IERC20
{

  /**
   * @dev Burns the given number of tokens, reducing total supply.
   */
  function burn (uint256 value) external;

  /**
   * @dev Increases the allowance of a given spender by the given amount.
   */
  function increaseAllowance (address spender, uint256 addedValue)
      external returns (bool);

  /**
   * @dev Decreases the allowance of a given spender by the given amount.
   */
  function decreaseAllowance (address spender, uint256 removedValue)
      external returns (bool);

}
/**
 * @dev Interface for the wrapped CHI (WCHI) token.
 */
function increaseAllowance (address spender, uint256 addedValue)
    external returns (bool);

/**
 * @dev Increases the allowance of a given spender by the given amount.
 */