1// Copyright (c) 2009-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_CRYPTO_HEX_BASE_H
6#define BITCOIN_CRYPTO_HEX_BASE_H
7
8#include <span.h>
9
10#include <cstddef>
11#include <cstdint>
12#include <span>
13#include <string>
14
15/**
16 * Convert a span of bytes to a lower-case hexadecimal string.
17 */
18std::string HexStr(std::span<const uint8_t> s);
19inline std::string HexStr(std::span<const char> s) { return HexStr(MakeUCharSpan(s)); }
20inline std::string HexStr(std::span<const std::byte> s) { return HexStr(MakeUCharSpan(s)); }
21
22signed char HexDigit(char c);
23
24#endif // BITCOIN_CRYPTO_HEX_BASE_H
25