//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERC20 {
function symbol() external view returns (string memory);
}
interface IERC20Bytes32 {
function symbol() external view returns (bytes32);
}
contract NameSync {
function syncNames(address token0, address token1) external view returns (string memory token0_name, string memory token1_name) {
token0_name = getSymbol(token0);
token1_name = getSymbol(token1);
}
function getSymbol(address token) internal view returns (string memory) {
// Try string symbol first
try IERC20(token).symbol() returns (string memory s) {
return s;
} catch {
// If string symbol fails, try bytes32
try IERC20Bytes32(token).symbol() returns (bytes32 s) {
return bytes32ToString(s);
} catch {
// If both fail, return a default value
return string(abi.encodePacked("UNK_", toAsciiString(token)));
}
}
}
function bytes32ToString(bytes32 _bytes32) internal pure returns (string memory) {
uint8 i = 0;
while(i < 32 && _bytes32[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && _bytes32[i] != 0; i++) {
bytesArray[i] = _bytes32[i];
}
return string(bytesArray);
}
function toAsciiString(address x) internal pure returns (string memory) {
bytes memory s = new bytes(40);
for (uint i = 0; i < 20; i++) {
bytes1 b = bytes1(uint8(uint(uint160(x)) / (2**(8*(19 - i)))));
bytes1 hi = bytes1(uint8(b) / 16);
bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
s[2*i] = char(hi);
s[2*i+1] = char(lo);
}
return string(s);
}
function char(bytes1 b) internal pure returns (bytes1 c) {
if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);
else return bytes1(uint8(b) + 0x57);
}
}