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// Copyright (c) 2019-2020 The Hush developers
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// Distributed under the GPLv3 software license, see the accompanying
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// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
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#include "dbwrapper.h"
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#include "notarizationdb.h"
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#include "uint256.h"
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#include "cc/eval.h"
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#include "crosschain.h"
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#include "main.h"
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#include <boost/foreach.hpp>
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NotarizationDB *pnotarizations;
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NotarizationDB::NotarizationDB(size_t nCacheSize, bool fMemory, bool fWipe) : CDBWrapper(GetDataDir() / "notarizations", nCacheSize, fMemory, fWipe, false, 64) { }
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NotarisationsInBlock ScanBlockNotarizations(const CBlock &block, int nHeight)
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{
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EvalRef eval;
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NotarisationsInBlock vNotarisations;
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int timestamp = block.nTime;
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bool ishush3 = strncmp(SMART_CHAIN_SYMBOL, "HUSH3",5) == 0 ? true : false;
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// No valid ntz's before this height on HUSH3
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if(ishush3 && (nHeight <= 360000)) {
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return vNotarisations;
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}
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for (unsigned int i = 0; i < block.vtx.size(); i++) {
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CTransaction tx = block.vtx[i];
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NotarisationData data;
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bool parsed = ParseNotarisationOpReturn(tx, data);
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if (!parsed) data = NotarisationData();
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if (strlen(data.symbol) == 0)
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continue;
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//printf("Checked notarisation data for %s \n",data.symbol);
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int authority = GetSymbolAuthority(data.symbol);
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if (authority == CROSSCHAIN_HUSH) {
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if (!eval->CheckNotaryInputs(tx, nHeight, block.nTime))
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continue;
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//printf("Authorised notarisation data for %s \n",data.symbol);
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}
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if (parsed) {
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vNotarisations.push_back(std::make_pair(tx.GetHash(), data));
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//printf("Parsed a notarisation for: %s, txid:%s, ccid:%i, momdepth:%i\n",
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// data.symbol, tx.GetHash().GetHex().data(), data.ccId, data.MoMDepth);
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//if (!data.MoMoM.IsNull()) printf("MoMoM:%s\n", data.MoMoM.GetHex().data());
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} else
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LogPrintf("WARNING: Couldn't parse notarisation for tx: %s at height %i\n", tx.GetHash().GetHex().data(), nHeight);
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}
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return vNotarisations;
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}
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bool GetBlockNotarisations(uint256 blockHash, NotarisationsInBlock &nibs)
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{
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return pnotarizations->Read(blockHash, nibs);
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}
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bool GetBackNotarisation(uint256 notarisationHash, Notarisation &n)
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{
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return pnotarizations->Read(notarisationHash, n);
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}
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/*
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* Write an index of HUSH notarisation id -> backnotarisation
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*/
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void WriteBackNotarisations(const NotarisationsInBlock notarisations, CDBBatch &batch)
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{
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int wrote = 0;
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BOOST_FOREACH(const Notarisation &n, notarisations)
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{
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if (!n.second.txHash.IsNull()) {
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batch.Write(n.second.txHash, n);
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wrote++;
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}
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}
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}
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void EraseBackNotarisations(const NotarisationsInBlock notarisations, CDBBatch &batch)
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{
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BOOST_FOREACH(const Notarisation &n, notarisations)
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{
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if (!n.second.txHash.IsNull())
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batch.Erase(n.second.txHash);
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}
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}
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/*
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* Scan notarisationsdb backwards for blocks containing a notarisation
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* for given symbol. Return height of matched notarisation or 0.
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*/
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int ScanNotarisationsDB(int height, std::string symbol, int scanLimitBlocks, Notarisation& out)
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{
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if (height < 0 || height > chainActive.Height())
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return false;
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for (int i=0; i<scanLimitBlocks; i++) {
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if (i > height) break;
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NotarisationsInBlock notarisations;
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uint256 blockHash = *chainActive[height-i]->phashBlock;
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if (!GetBlockNotarisations(blockHash, notarisations))
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continue;
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BOOST_FOREACH(Notarisation& nota, notarisations) {
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if (strcmp(nota.second.symbol, symbol.data()) == 0) {
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out = nota;
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return height-i;
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}
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}
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}
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return 0;
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}
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int ScanNotarisationsDB2(int height, std::string symbol, int scanLimitBlocks, Notarisation& out)
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{
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int32_t i,maxheight,ht;
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maxheight = chainActive.Height();
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if ( height < 0 || height > maxheight )
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return false;
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for (i=0; i<scanLimitBlocks; i++)
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{
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ht = height+i;
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if ( ht > maxheight )
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break;
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NotarisationsInBlock notarisations;
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uint256 blockHash = *chainActive[ht]->phashBlock;
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if ( !GetBlockNotarisations(blockHash,notarisations) )
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continue;
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BOOST_FOREACH(Notarisation& nota,notarisations)
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{
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if ( strcmp(nota.second.symbol,symbol.data()) == 0 )
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{
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out = nota;
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return(ht);
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}
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}
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}
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return 0;
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}
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