1  pragma solidity >=0.6.0;
 2  
 3  import "../interfaces/IERC20Details.sol";
 4  import "../utils/MoreMath.sol";
 5  import "../utils/SafeMath.sol";
 6  import "../utils/SignedSafeMath.sol";
 7  
 8  library Convert {
 9  
10      using SafeMath for uint;
11      using SignedSafeMath for int;
12  
13      function to18DecimalsBase(address tk, uint value) internal view returns(uint) {
14  
15          uint b1 = 18;
16          uint b2 = IERC20Details(tk).decimals();
17          return formatValue(value, b1, b2);
18      }
19  
20      function from18DecimalsBase(address tk, uint value) internal view returns(uint) {
21  
22          uint b1 = 18;
23          uint b2 = IERC20Details(tk).decimals();
24          return formatValue(value, b2, b1);
25      }
26  
27      function formatValue(uint value, uint b1, uint b2) internal pure returns(uint) {
28          
29          if (b2 < b1) {
30              value = value.mul(MoreMath.pow(10, (b1.sub(b2))));
31          }
32          
33          if (b2 > b1) {
34              value = value.div(MoreMath.pow(10, (b2.sub(b1))));
35          }
36  
37          return value;
38      }
39  
40      function formatValue(int value, int b1, int b2) internal pure returns(int) {
41          
42          if (b2 < b1) {
43              value = value.mul(int256(MoreMath.pow(10, uint256(b1.sub(b2)))));
44          }
45          
46          if (b2 > b1) {
47              value = value.div(int256(MoreMath.pow(10, uint256(b2.sub(b1)))));
48          }
49  
50          return value;
51      }
52  }