add IERC20Detailed

network-contracts/contracts/IERC20Detailed.sol

@@ -0,0 +1,52 @@
+pragma solidity >=0.5.0 <0.7.0;
+
+import "./IERC20.sol";
+
+contract ERC20Detailed is IERC20 {
+  string private _name;
+  string private _symbol;
+  uint8 private _decimals;
+
+  /**
+   * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
+   * these values are immutable: they can only be set once during
+   * construction.
+   */
+  constructor (string memory name, string memory symbol, uint8 decimals) public {
+    _name = name;
+    _symbol = symbol;
+    _decimals = decimals;
+  }
+
+  /**
+   * @dev Returns the name of the token.
+   */
+  function name() public view returns (string memory) {
+    return _name;
+  }
+
+  /**
+   * @dev Returns the symbol of the token, usually a shorter version of the
+   * name.
+   */
+  function symbol() public view returns (string memory) {
+    return _symbol;
+  }
+
+  /**
+   * @dev Returns the number of decimals used to get its user representation.
+   * For example, if `decimals` equals `2`, a balance of `505` tokens should
+   * be displayed to a user as `5,05` (`505 / 10 ** 2`).
+   *
+   * Tokens usually opt for a value of 18, imitating the relationship between
+   * Ether and Wei.
+   *
+   * NOTE: This information is only used for _display_ purposes: it in
+   * no way affects any of the arithmetic of the contract, including
+   * {IERC20-balanceOf} and {IERC20-transfer}.
+   */
+  function decimals() public view returns (uint8) {
+    return _decimals;
+  }
+}
+