Audit

A security vulnerability has been detected.
*/
library Strings {
bytest16 private constant _ALPHABET = "0123456789abcdef";

/**
* @dev Converts a 'uint256' to its ASCCI 'string' decimal representation.
*/
function to String(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

if (value ==0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}

/**
* @dev Converts a 'uint256' to its ASCII 'string' hexadecimal representation with fixed length
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _ALPHABET[value & 0xf];
value >>= 4;
}
require(value == 0, "String: hex length insufficient");
return string(buffer);
}
}