Hush Full Node software. We were censored from Github, this is where all development happens now.
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336 lines
14 KiB
336 lines
14 KiB
/******************************************************************************
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* Copyright © 2014-2018 The SuperNET Developers. *
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* *
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* See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at *
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* the top-level directory of this distribution for the individual copyright *
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* holder information and the developer policies on copyright and licensing. *
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* *
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* Unless otherwise agreed in a custom licensing agreement, no part of the *
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* SuperNET software, including this file may be copied, modified, propagated *
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* or distributed except according to the terms contained in the LICENSE file *
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* *
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* Removal or modification of this copyright notice is prohibited. *
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* *
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******************************************************************************/
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#include "CCPrices.h"
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/*
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Prices CC would best build on top of the oracles CC, ie. to combine payments for multiple oracles and to calculate a 51% protected price feed.
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We need to assume there is an oracle for a specific price. In the event there are more than one provider, the majority need to be within correlation distance to update a pricepoint.
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int64_t OraclePrice(int32_t height,uint256 reforacletxid,char *markeraddr,char *format);
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Using the above function, a consensus price can be obtained for a datasource.
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given an oracletxid, the marketaddr and format can be extracted to be used for future calls to OraclePrice. This allows to set a starting price and that in turn allows cash settled leveraged trading!
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Funds work like with dice, ie. there is a Prices plan that traders bet against.
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PricesOpen -> oracletxid start with 'L' price, leverage, amount
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funds are locked into global CC address
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it can be closed at anytime by the trader for cash settlement
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the house account can close it if rekt
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Implementation Notes:
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In order to eliminate the need for worrying about sybil attacks, each prices plan would be able to specific pubkey(s?) for whitelisted publishers. It would be possible to have a non-whitelisted plan that would use 50% correlation between publishers.
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delta neutral balancing of risk exposure
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*/
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// start of consensus code
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int64_t IsPricesvout(struct CCcontract_info *cp,const CTransaction& tx,int32_t v)
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{
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char destaddr[64];
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if ( tx.vout[v].scriptPubKey.IsPayToCryptoCondition() != 0 )
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{
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if ( Getscriptaddress(destaddr,tx.vout[v].scriptPubKey) > 0 && strcmp(destaddr,cp->unspendableCCaddr) == 0 )
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return(tx.vout[v].nValue);
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}
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return(0);
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}
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bool PricesExactAmounts(struct CCcontract_info *cp,Eval* eval,const CTransaction &tx,int32_t minage,uint64_t txfee)
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{
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static uint256 zerohash;
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CTransaction vinTx; uint256 hashBlock,activehash; int32_t i,numvins,numvouts; int64_t inputs=0,outputs=0,assetoshis;
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numvins = tx.vin.size();
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numvouts = tx.vout.size();
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for (i=0; i<numvins; i++)
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{
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//fprintf(stderr,"vini.%d\n",i);
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if ( (*cp->ismyvin)(tx.vin[i].scriptSig) != 0 )
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{
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//fprintf(stderr,"vini.%d check mempool\n",i);
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if ( eval->GetTxUnconfirmed(tx.vin[i].prevout.hash,vinTx,hashBlock) == 0 )
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return eval->Invalid("cant find vinTx");
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else
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{
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//fprintf(stderr,"vini.%d check hash and vout\n",i);
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if ( hashBlock == zerohash )
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return eval->Invalid("cant Prices from mempool");
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if ( (assetoshis= IsPricesvout(cp,vinTx,tx.vin[i].prevout.n)) != 0 )
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inputs += assetoshis;
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}
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}
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}
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for (i=0; i<numvouts; i++)
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{
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//fprintf(stderr,"i.%d of numvouts.%d\n",i,numvouts);
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if ( (assetoshis= IsPricesvout(cp,tx,i)) != 0 )
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outputs += assetoshis;
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}
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if ( inputs != outputs+txfee )
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{
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fprintf(stderr,"inputs %llu vs outputs %llu\n",(long long)inputs,(long long)outputs);
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return eval->Invalid("mismatched inputs != outputs + txfee");
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}
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else return(true);
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}
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bool PricesValidate(struct CCcontract_info *cp,Eval* eval,const CTransaction &tx)
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{
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int32_t numvins,numvouts,preventCCvins,preventCCvouts,i,numblocks; bool retval; uint256 txid; uint8_t hash[32]; char str[65],destaddr[64];
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return(false);
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std::vector<std::pair<CAddressIndexKey, CAmount> > txids;
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numvins = tx.vin.size();
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numvouts = tx.vout.size();
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preventCCvins = preventCCvouts = -1;
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if ( numvouts < 1 )
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return eval->Invalid("no vouts");
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else
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{
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for (i=0; i<numvins; i++)
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{
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if ( IsCCInput(tx.vin[0].scriptSig) == 0 )
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{
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return eval->Invalid("illegal normal vini");
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}
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}
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//fprintf(stderr,"check amounts\n");
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if ( PricesExactAmounts(cp,eval,tx,1,10000) == false )
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{
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fprintf(stderr,"Pricesget invalid amount\n");
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return false;
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}
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else
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{
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txid = tx.GetHash();
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memcpy(hash,&txid,sizeof(hash));
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retval = PreventCC(eval,tx,preventCCvins,numvins,preventCCvouts,numvouts);
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if ( retval != 0 )
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fprintf(stderr,"Pricesget validated\n");
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else fprintf(stderr,"Pricesget invalid\n");
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return(retval);
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}
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}
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}
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// end of consensus code
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// helper functions for rpc calls in rpcwallet.cpp
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int64_t AddPricesInputs(struct CCcontract_info *cp,CMutableTransaction &mtx,CPubKey pk,int64_t total,int32_t maxinputs)
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{
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char coinaddr[64]; int64_t nValue,price,totalinputs = 0; uint256 txid,hashBlock; std::vector<uint8_t> origpubkey; CTransaction vintx; int32_t vout,n = 0;
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std::vector<std::pair<CAddressUnspentKey, CAddressUnspentValue> > unspentOutputs;
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GetCCaddress(cp,coinaddr,pk);
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SetCCunspents(unspentOutputs,coinaddr);
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for (std::vector<std::pair<CAddressUnspentKey, CAddressUnspentValue> >::const_iterator it=unspentOutputs.begin(); it!=unspentOutputs.end(); it++)
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{
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txid = it->first.txhash;
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vout = (int32_t)it->first.index;
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// no need to prevent dup
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if ( GetTransaction(txid,vintx,hashBlock,false) != 0 )
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{
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if ( (nValue= IsPricesvout(cp,vintx,vout)) > 1000000 && myIsutxo_spentinmempool(txid,vout) == 0 )
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{
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if ( total != 0 && maxinputs != 0 )
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mtx.vin.push_back(CTxIn(txid,vout,CScript()));
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nValue = it->second.satoshis;
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totalinputs += nValue;
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n++;
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if ( (total > 0 && totalinputs >= total) || (maxinputs > 0 && n >= maxinputs) )
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break;
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}
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}
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}
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return(totalinputs);
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}
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#ifdef later
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UniValue PricesInfo(uint256 pricesid)
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{
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UniValue result(UniValue::VOBJ); CPubKey pricepk; uint256 hashBlock,oracletxid; CTransaction vintx; int64_t minbet,maxbet,maxodds; uint64_t funding; char numstr[65]; struct CCcontract_info *cp,C;
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if ( GetTransaction(pricesid,vintx,hashBlock,false) == 0 )
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{
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fprintf(stderr,"cant find fundingtxid\n");
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ERR_RESULT("cant find fundingtxid");
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return(result);
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}
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if ( vintx.vout.size() > 0 && DecodePricesFundingOpRet(vintx.vout[vintx.vout.size()-1].scriptPubKey,oracletxid,minbet,maxbet,maxodds) == 0 )
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{
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fprintf(stderr,"fundingtxid isnt price creation txid\n");
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ERR_RESULT("fundingtxid isnt price creation txid");
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return(result);
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}
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result.push_back(Pair("result","success"));
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result.push_back(Pair("pricesid",uint256_str(str,pricesid)));
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result.push_back(Pair("oracletxid",uint256_str(str,oracletxid)));
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sprintf(numstr,"%.8f",(double)minbet/COIN);
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result.push_back(Pair("minbet",numstr));
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sprintf(numstr,"%.8f",(double)maxbet/COIN);
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result.push_back(Pair("maxbet",numstr));
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result.push_back(Pair("maxodds",maxodds));
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cp = CCinit(&C,EVAL_PRICES);
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pricepk = GetUnspendable(cp,0);
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funding = PricePlanFunds(cp,pricepk,pricesid);
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sprintf(numstr,"%.8f",(double)funding/COIN);
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result.push_back(Pair("funding",numstr));
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return(result);
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}
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UniValue PricesList()
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{
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UniValue result(UniValue::VARR); std::vector<std::pair<CAddressIndexKey, CAmount> > addressIndex; struct CCcontract_info *cp,C; uint256 txid,hashBlock,oracletxid; CTransaction vintx; int64_t minbet,maxbet,maxodds; char str[65];
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cp = CCinit(&C,EVAL_PRICES);
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SetCCtxids(addressIndex,cp->normaladdr);
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for (std::vector<std::pair<CAddressIndexKey, CAmount> >::const_iterator it=addressIndex.begin(); it!=addressIndex.end(); it++)
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{
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txid = it->first.txhash;
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if ( GetTransaction(txid,vintx,hashBlock,false) != 0 )
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{
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if ( vintx.vout.size() > 0 && DecodePricesFundingOpRet(vintx.vout[vintx.vout.size()-1].scriptPubKey,oracletxid,minbet,maxbet,maxodds) != 0 )
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{
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result.push_back(uint256_str(str,txid));
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}
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}
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}
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return(result);
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}
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std::string PricesCreateFunding(uint64_t txfee,char *planstr,int64_t funds,int64_t minbet,int64_t maxbet,int64_t maxodds,int64_t timeoutblocks)
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{
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CMutableTransaction mtx; uint256 zero; CScript fundingPubKey; CPubKey mypk,pricepk; int64_t a,b,c,d; uint64_t sbits; struct CCcontract_info *cp,C;
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if ( funds < 0 || minbet < 0 || maxbet < 0 || maxodds < 1 || maxodds > 9999 || timeoutblocks < 0 || timeoutblocks > 1440 )
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{
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CCerror = "invalid parameter error";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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if ( funds < 100*COIN )
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{
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CCerror = "price plan needs at least 100 coins";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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memset(&zero,0,sizeof(zero));
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if ( (cp= Pricesinit(fundingPubKey,zero,&C,planstr,txfee,mypk,pricepk,sbits,a,b,c,d)) == 0 )
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{
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CCerror = "Priceinit error in create funding";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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if ( AddNormalinputs(mtx,mypk,funds+3*txfee,60) > 0 )
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{
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mtx.vout.push_back(MakeCC1vout(cp->evalcode,funds,pricepk));
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mtx.vout.push_back(CTxOut(txfee,CScript() << ParseHex(HexStr(mypk)) << OP_CHECKSIG));
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mtx.vout.push_back(CTxOut(txfee,CScript() << ParseHex(HexStr(pricepk)) << OP_CHECKSIG));
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return(FinalizeCCTx(0,cp,mtx,mypk,txfee,EncodePricesFundingOpRet('F',sbits,minbet,maxbet,maxodds,timeoutblocks)));
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}
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CCerror = "cant find enough inputs";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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std::string PricesAddfunding(uint64_t txfee,char *planstr,uint256 fundingtxid,int64_t amount)
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{
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CMutableTransaction mtx; CScript fundingPubKey,scriptPubKey; CPubKey mypk,pricepk; struct CCcontract_info *cp,C; int64_t minbet,maxbet,maxodds;
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if ( amount < 0 )
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{
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CCerror = "amount must be positive";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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if ( (cp= Pricesinit(fundingPubKey,fundingtxid,&C,planstr,txfee,mypk,pricepk,sbits,minbet,maxbet,maxodds,timeoutblocks)) == 0 )
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return("");
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scriptPubKey = CScript() << ParseHex(HexStr(mypk)) << OP_CHECKSIG;
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if ( scriptPubKey == fundingPubKey )
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{
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if ( AddNormalinputs(mtx,mypk,amount+2*txfee,60) > 0 )
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{
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mtx.vout.push_back(MakeCC1vout(cp->evalcode,amount,pricepk));
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mtx.vout.push_back(CTxOut(txfee,fundingPubKey));
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return(FinalizeCCTx(0,cp,mtx,mypk,txfee,EncodePricesOpRet('E',sbits,fundingtxid,hentropy,zeroid)));
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}
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else
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{
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CCerror = "cant find enough inputs";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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}
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}
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else
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{
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CCerror = "only fund creator can add more funds (entropy)";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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}
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return("");
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}
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std::string PricesBet(uint64_t txfee,uint256 pricesid,int64_t bet,int32_t odds)
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{
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CMutableTransaction mtx; CScript fundingPubKey; CPubKey mypk,pricepk; int64_t funding,minbet,maxbet,maxodds; struct CCcontract_info *cp,C;
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if ( bet < 0 )
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{
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CCerror = "bet must be positive";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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if ( odds < 1 || odds > 9999 )
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{
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CCerror = "odds must be between 1 and 9999";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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if ( (cp= Pricesinit(fundingPubKey,pricesid,&C,txfee,mypk,pricepk,minbet,maxbet,maxodds)) == 0 )
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return("");
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if ( bet < minbet || bet > maxbet || odds > maxodds )
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{
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CCerror = strprintf("Price plan %s illegal bet %.8f: minbet %.8f maxbet %.8f or odds %d vs max.%d\n",planstr,(double)bet/COIN,(double)minbet/COIN,(double)maxbet/COIN,(int32_t)odds,(int32_t)maxodds);
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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if ( (funding= PricesPlanFunds(cp,pricepk,pricesid)) >= 2*bet*odds+txfee )
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{
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if ( myIsutxo_spentinmempool(entropytxid,0) != 0 )
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{
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CCerror = "entropy txid is spent";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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if ( AddNormalinputs(mtx,mypk,bet+2*txfee+odds,60) > 0 )
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{
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mtx.vout.push_back(MakeCC1vout(cp->evalcode,entropyval,pricepk));
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mtx.vout.push_back(MakeCC1vout(cp->evalcode,bet,pricepk));
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mtx.vout.push_back(CTxOut(txfee+odds,CScript() << ParseHex(HexStr(mypk)) << OP_CHECKSIG));
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return(FinalizeCCTx(0,cp,mtx,mypk,txfee,EncodePricesOpRet('B',pricesid)));
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} else fprintf(stderr,"cant find enough normal inputs for %.8f, plan funding %.8f\n",(double)bet/COIN,(double)funding/COIN);
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}
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if ( entropyval == 0 && funding != 0 )
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CCerror = "cant find price entropy inputs";
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else CCerror = "cant find price input";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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std::string PricesBetFinish(int32_t *resultp,uint64_t txfee,uint256 pricesid,uint256 bettxid)
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{
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*resultp = -1;
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CCerror = "couldnt find bettx or entropytx";
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fprintf(stderr,"%s\n", CCerror.c_str() );
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return("");
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}
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#endif
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