SafeMetadata.sol

// SPDX-License-Identifier: MIT
pragma solidity =0.8.4;

import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import {IERC20Metadata} from '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';

library SafeMetadata {
    function safeName(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(IERC20Metadata.name.selector)
        );
        if (success) return abi.decode(data, (string));
        return 'Token';
    }

    function safeSymbol(IERC20 token) internal view returns (string memory) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(IERC20Metadata.symbol.selector)
        );
        if (success) return abi.decode(data, (string));
        return 'TKN';
    }

    function safeDecimals(IERC20 token) internal view returns (uint8) {
        (bool success, bytes memory data) = address(token).staticcall(
            abi.encodeWithSelector(IERC20Metadata.decimals.selector)
        );
        if (success && data.length >= 32) return abi.decode(data, (uint8));
        return 18;
    }
}