56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2014 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_UINT252_H
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#define BITCOIN_UINT252_H
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#include <vector>
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#include <uint256.h>
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#include <serialize.h>
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// Wrapper of uint256 with guarantee that first
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// four bits are zero.
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class uint252 {
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private:
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uint256 contents;
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public:
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ADD_SERIALIZE_METHODS;
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template <typename Stream, typename Operation>
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inline void SerializationOp(Stream& s, Operation ser_action) {
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READWRITE(contents);
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if ((*contents.begin()) & 0xF0) {
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throw std::ios_base::failure("spending key has invalid leading bits");
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}
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}
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const unsigned char* begin() const
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{
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return contents.begin();
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}
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const unsigned char* end() const
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{
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return contents.end();
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}
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uint252() : contents() {};
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explicit uint252(const uint256& in) : contents(in) {
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if (*contents.begin() & 0xF0) {
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throw std::domain_error("leading bits are set in argument given to uint252 constructor");
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}
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}
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uint256 inner() const {
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return contents;
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}
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friend inline bool operator==(const uint252& a, const uint252& b) { return a.contents == b.contents; }
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};
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#endif // BITCOIN_UINT252_H
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