MOVEONLY: Move script/compressor out of script and put CTxOutCompressor (from

core) with it

2 files changed, 0 insertions, 219 deletions

diff --git a/src/script/compressor.cpp b/src/script/compressor.cpp
deleted file mode 100644
index af1acf48db..0000000000
--- a/src/script/compressor.cpp
+++ /dev/null
@@ -1,130 +0,0 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#include "compressor.h"
-
-#include "key.h"
-#include "script/standard.h"
-
-bool CScriptCompressor::IsToKeyID(CKeyID &hash) const
-{
-    if (script.size() == 25 && script[0] == OP_DUP && script[1] == OP_HASH160
-                            && script[2] == 20 && script[23] == OP_EQUALVERIFY
-                            && script[24] == OP_CHECKSIG) {
-        memcpy(&hash, &script[3], 20);
-        return true;
-    }
-    return false;
-}
-
-bool CScriptCompressor::IsToScriptID(CScriptID &hash) const
-{
-    if (script.size() == 23 && script[0] == OP_HASH160 && script[1] == 20
-                            && script[22] == OP_EQUAL) {
-        memcpy(&hash, &script[2], 20);
-        return true;
-    }
-    return false;
-}
-
-bool CScriptCompressor::IsToPubKey(CPubKey &pubkey) const
-{
-    if (script.size() == 35 && script[0] == 33 && script[34] == OP_CHECKSIG
-                            && (script[1] == 0x02 || script[1] == 0x03)) {
-        pubkey.Set(&script[1], &script[34]);
-        return true;
-    }
-    if (script.size() == 67 && script[0] == 65 && script[66] == OP_CHECKSIG
-                            && script[1] == 0x04) {
-        pubkey.Set(&script[1], &script[66]);
-        return pubkey.IsFullyValid(); // if not fully valid, a case that would not be compressible
-    }
-    return false;
-}
-
-bool CScriptCompressor::Compress(std::vector<unsigned char> &out) const
-{
-    CKeyID keyID;
-    if (IsToKeyID(keyID)) {
-        out.resize(21);
-        out[0] = 0x00;
-        memcpy(&out[1], &keyID, 20);
-        return true;
-    }
-    CScriptID scriptID;
-    if (IsToScriptID(scriptID)) {
-        out.resize(21);
-        out[0] = 0x01;
-        memcpy(&out[1], &scriptID, 20);
-        return true;
-    }
-    CPubKey pubkey;
-    if (IsToPubKey(pubkey)) {
-        out.resize(33);
-        memcpy(&out[1], &pubkey[1], 32);
-        if (pubkey[0] == 0x02 || pubkey[0] == 0x03) {
-            out[0] = pubkey[0];
-            return true;
-        } else if (pubkey[0] == 0x04) {
-            out[0] = 0x04 | (pubkey[64] & 0x01);
-            return true;
-        }
-    }
-    return false;
-}
-
-unsigned int CScriptCompressor::GetSpecialSize(unsigned int nSize) const
-{
-    if (nSize == 0 || nSize == 1)
-        return 20;
-    if (nSize == 2 || nSize == 3 || nSize == 4 || nSize == 5)
-        return 32;
-    return 0;
-}
-
-bool CScriptCompressor::Decompress(unsigned int nSize, const std::vector<unsigned char> &in)
-{
-    switch(nSize) {
-    case 0x00:
-        script.resize(25);
-        script[0] = OP_DUP;
-        script[1] = OP_HASH160;
-        script[2] = 20;
-        memcpy(&script[3], &in[0], 20);
-        script[23] = OP_EQUALVERIFY;
-        script[24] = OP_CHECKSIG;
-        return true;
-    case 0x01:
-        script.resize(23);
-        script[0] = OP_HASH160;
-        script[1] = 20;
-        memcpy(&script[2], &in[0], 20);
-        script[22] = OP_EQUAL;
-        return true;
-    case 0x02:
-    case 0x03:
-        script.resize(35);
-        script[0] = 33;
-        script[1] = nSize;
-        memcpy(&script[2], &in[0], 32);
-        script[34] = OP_CHECKSIG;
-        return true;
-    case 0x04:
-    case 0x05:
-        unsigned char vch[33] = {};
-        vch[0] = nSize - 2;
-        memcpy(&vch[1], &in[0], 32);
-        CPubKey pubkey(&vch[0], &vch[33]);
-        if (!pubkey.Decompress())
-            return false;
-        assert(pubkey.size() == 65);
-        script.resize(67);
-        script[0] = 65;
-        memcpy(&script[1], pubkey.begin(), 65);
-        script[66] = OP_CHECKSIG;
-        return true;
-    }
-    return false;
-}
diff --git a/src/script/compressor.h b/src/script/compressor.h
deleted file mode 100644
index 154e0b2662..0000000000
--- a/src/script/compressor.h
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef H_BITCOIN_SCRIPT_COMPRESSOR
-#define H_BITCOIN_SCRIPT_COMPRESSOR
-
-#include "script/script.h"
-#include "serialize.h"
-
-class CKeyID;
-class CPubKey;
-class CScriptID;
-
-/** Compact serializer for scripts.
- *
- *  It detects common cases and encodes them much more efficiently.
- *  3 special cases are defined:
- *  * Pay to pubkey hash (encoded as 21 bytes)
- *  * Pay to script hash (encoded as 21 bytes)
- *  * Pay to pubkey starting with 0x02, 0x03 or 0x04 (encoded as 33 bytes)
- *
- *  Other scripts up to 121 bytes require 1 byte + script length. Above
- *  that, scripts up to 16505 bytes require 2 bytes + script length.
- */
-class CScriptCompressor
-{
-private:
-    // make this static for now (there are only 6 special scripts defined)
-    // this can potentially be extended together with a new nVersion for
-    // transactions, in which case this value becomes dependent on nVersion
-    // and nHeight of the enclosing transaction.
-    static const unsigned int nSpecialScripts = 6;
-
-    CScript &script;
-protected:
-    // These check for scripts for which a special case with a shorter encoding is defined.
-    // They are implemented separately from the CScript test, as these test for exact byte
-    // sequence correspondences, and are more strict. For example, IsToPubKey also verifies
-    // whether the public key is valid (as invalid ones cannot be represented in compressed
-    // form).
-    bool IsToKeyID(CKeyID &hash) const;
-    bool IsToScriptID(CScriptID &hash) const;
-    bool IsToPubKey(CPubKey &pubkey) const;
-
-    bool Compress(std::vector<unsigned char> &out) const;
-    unsigned int GetSpecialSize(unsigned int nSize) const;
-    bool Decompress(unsigned int nSize, const std::vector<unsigned char> &out);
-public:
-    CScriptCompressor(CScript &scriptIn) : script(scriptIn) { }
-
-    unsigned int GetSerializeSize(int nType, int nVersion) const {
-        std::vector<unsigned char> compr;
-        if (Compress(compr))
-            return compr.size();
-        unsigned int nSize = script.size() + nSpecialScripts;
-        return script.size() + VARINT(nSize).GetSerializeSize(nType, nVersion);
-    }
-
-    template<typename Stream>
-    void Serialize(Stream &s, int nType, int nVersion) const {
-        std::vector<unsigned char> compr;
-        if (Compress(compr)) {
-            s << CFlatData(compr);
-            return;
-        }
-        unsigned int nSize = script.size() + nSpecialScripts;
-        s << VARINT(nSize);
-        s << CFlatData(script);
-    }
-
-    template<typename Stream>
-    void Unserialize(Stream &s, int nType, int nVersion) {
-        unsigned int nSize = 0;
-        s >> VARINT(nSize);
-        if (nSize < nSpecialScripts) {
-            std::vector<unsigned char> vch(GetSpecialSize(nSize), 0x00);
-            s >> REF(CFlatData(vch));
-            Decompress(nSize, vch);
-            return;
-        }
-        nSize -= nSpecialScripts;
-        script.resize(nSize);
-        s >> REF(CFlatData(script));
-    }
-};
-
-#endif // H_BITCOIN_SCRIPT_COMPRESSOR