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54 lines
1.5 KiB
54 lines
1.5 KiB
pragma solidity ^0.6.0;
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import "./IERC20.sol";
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/**
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* @dev Optional functions from the ERC20 standard.
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*/
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abstract contract ERC20Detailed is IERC20 {
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string private _name;
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string private _symbol;
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uint8 private _decimals;
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/**
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* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
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* these values are immutable: they can only be set once during
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* construction.
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*/
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constructor (string memory name, string memory symbol, uint8 decimals) public {
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_name = name;
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_symbol = symbol;
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_decimals = decimals;
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}
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/**
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* @dev Returns the name of the token.
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*/
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function name() public view returns (string memory) {
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return _name;
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}
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/**
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* @dev Returns the symbol of the token, usually a shorter version of the
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* name.
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*/
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function symbol() public view returns (string memory) {
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return _symbol;
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}
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/**
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* @dev Returns the number of decimals used to get its user representation.
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* For example, if `decimals` equals `2`, a balance of `505` tokens should
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* be displayed to a user as `5,05` (`505 / 10 ** 2`).
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*
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* Tokens usually opt for a value of 18, imitating the relationship between
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* Ether and Wei.
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*
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* NOTE: This information is only used for _display_ purposes: it in
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* no way affects any of the arithmetic of the contract, including
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* {IERC20-balanceOf} and {IERC20-transfer}.
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*/
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function decimals() public view returns (uint8) {
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return _decimals;
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}
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}
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