payments.cpp

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 * Copyright © 2014-2019 The SuperNET Developers.                             *
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#include "CCPayments.h"

/* 
 0) txidopret <- allocation, scriptPubKey, opret
 1) create <-  locked_blocks, minrelease, list of txidopret
 
 2) fund createtxid amount opretflag to global CC address with opret or txidaddr without
 
 3) release amount -> vout[i] will be scriptPubKeys[i] and (amount * allocations[i]) / sumallocations[] (only using vins that have been locked for locked_blocks+). 
 
 4) info txid -> display parameters, funds
 5) list -> all txids
 
 First step is to create txids with the info needed in their opreturns. this info is the weight, scriptPubKey and opret if needed. To do that txidopret is used:
 
 ./c is a script that invokes komodo-cli with the correct -ac_name
 
 ./c paymentstxidopret \"[9,%222102d6f13a8f745921cdb811e32237bb98950af1a5952be7b3d429abd9152f8e388dac%22]\" -> rawhex with txid 95d9fc8d8a3ef63693c7427e59ff5e177ef63b7345d5f6d6497ac262699a8def
 
 ./c paymentstxidopret \"[1,%2221039433dc3749aece1bd568f374a45da3b0bc6856990d7da3cd175399577940a775ac%22]\" -> rawhex txid 00469695a08b975ceaf7258896abbf1455eb0f383e8a98fc650deace4cbf02a1
 
 now we have 2 txid with the required info in the opreturn. one of them has a 9 and the other a 1 for a 90%/10% split.
 
 ./c paymentscreate \"[0,0,%2295d9fc8d8a3ef63693c7427e59ff5e177ef63b7345d5f6d6497ac262699a8def%22,%2200469695a08b975ceaf7258896abbf1455eb0f383e8a98fc650deace4cbf02a1%22]\" -> created txid 318d827cc6d8f25f40517e7fb0982e3f707b4aa749d322483fc336686a87b28a that will be the createtxid that the other rpc calls will use.
 
 lets see if this appears in the list
 
 ./c paymentslist ->
 {
 "result": "success",
 "createtxids": [
 "318d827cc6d8f25f40517e7fb0982e3f707b4aa749d322483fc336686a87b28a"
 ]
 }
 
 It appeared! now lets get more info on it:
 ./c paymentsinfo \"[%22318d827cc6d8f25f40517e7fb0982e3f707b4aa749d322483fc336686a87b28a%22]\"
 {
 "lockedblocks": 0,
 "totalallocations": 10,
 "minrelease": 0,
 "RWRM36sC8jSctyFZtsu7CyDcHYPdZX7nPZ": 0.00000000,
 "REpyKi7avsVduqZ3eimncK4uKqSArLTGGK": 0.00000000,
 "totalfunds": 0.00000000,
 "result": "success"
 }
 
 There are 2 possible places the funds for this createtxid can be, the first is the special address that is derived from combining the globalCC address with the txidaddr. txidaddr is a non-spendable markeraddress created by converting the txid into a 33 byte pubkey by prefixing 0x02 to the txid. It is a 1of2 address, so it doesnt matter that nobody knows the privkey for this txidaddr. the second address is the global CC address and only utxo to that address with an opreturn containing the createtxid are funds valid for this payments CC createtxid
 
 next let us add some funds to it. the funds can be to either of the two addresses, controlled by useopret (defaults to 0)
 
 ./c paymentsfund \"[%22318d827cc6d8f25f40517e7fb0982e3f707b4aa749d322483fc336686a87b28a%22,1,0]\" -> txid 28f69b925bb7a21d2a3ba2327e85eb2031b014e976e43f5c2c6fb8a76767b221, which indeed sent funds to RWRM36sC8jSctyFZtsu7CyDcHYPdZX7nPZ without an opreturn and it appears on the payments info.
 
 ./c paymentsfund \"[%22318d827cc6d8f25f40517e7fb0982e3f707b4aa749d322483fc336686a87b28a%22,1,1]\" -> txid cc93330b5c951b724b246b3b138d00519c33f2a600a7c938bc9e51aff6e20e32, which indeed sent funds to REpyKi7avsVduqZ3eimncK4uKqSArLTGGK with an opreturn and it appears on the payments info.

 
./c paymentsrelease \"[%22318d827cc6d8f25f40517e7fb0982e3f707b4aa749d322483fc336686a87b28a%22,1.5]\" -> a8d5dbbb8ee94c05e75c4f3c5221091f59dcb86e0e9c4e1e3d2cf69e6fce6b81
 
 it used both fund utxos
 
*/

// start of consensus code

void mpz_set_lli( mpz_t rop, long long op )
{
   mpz_import(rop, 1, 1, sizeof(op), 0, 0, &op);
}

int64_t mpz_get_si2( mpz_t op )
{
    int64_t ret = 0;
    mpz_export(&ret, NULL, 1, sizeof(ret), 0, 0, op);
    return ret;
}

uint64_t mpz_get_ui2( mpz_t op )
{
    uint64_t ret = 0;
    mpz_export(&ret, NULL, 1, sizeof(ret), 0, 0, op);
    return ret;
}

CScript EncodePaymentsTxidOpRet(int64_t allocation,std::vector<uint8_t> scriptPubKey,std::vector<uint8_t> destopret)
{
    CScript opret; uint8_t evalcode = EVAL_PAYMENTS;
    opret << OP_RETURN << E_MARSHAL(ss << evalcode << 'T' << allocation << scriptPubKey << destopret);
    return(opret);
}

uint8_t DecodePaymentsTxidOpRet(CScript scriptPubKey,int64_t &allocation,std::vector<uint8_t> &destscriptPubKey,std::vector<uint8_t> &destopret)
{
    std::vector<uint8_t> vopret; uint8_t *script,e,f;
    GetOpReturnData(scriptPubKey, vopret);
    script = (uint8_t *)vopret.data();
    if ( vopret.size() > 2 && E_UNMARSHAL(vopret,ss >> e; ss >> f; ss >> allocation; ss >> destscriptPubKey; ss >> destopret) != 0 )
    {
        if ( e == EVAL_PAYMENTS && f == 'T' )
            return(f);
    }
    return(0);
}

CScript EncodePaymentsFundOpRet(uint256 checktxid)
{
    CScript opret; uint8_t evalcode = EVAL_PAYMENTS;
    opret << OP_RETURN << E_MARSHAL(ss << evalcode << 'F' << checktxid);
    return(opret);
}

uint8_t DecodePaymentsFundOpRet(CScript scriptPubKey,uint256 &checktxid)
{
    std::vector<uint8_t> vopret; uint8_t *script,e,f;
    GetOpReturnData(scriptPubKey, vopret);
    script = (uint8_t *)vopret.data();
    if ( vopret.size() > 2 && E_UNMARSHAL(vopret,ss >> e; ss >> f; ss >> checktxid) != 0 )
    {
        if ( e == EVAL_PAYMENTS && f == 'F' )
            return(f);
    }
    return(0);
}

CScript EncodePaymentsMergeOpRet(uint256 checktxid)
{
    CScript opret; uint8_t evalcode = EVAL_PAYMENTS;
    opret << OP_RETURN << E_MARSHAL(ss << evalcode << 'M' << checktxid);
    return(opret);
}

uint8_t DecodePaymentsMergeOpRet(CScript scriptPubKey,uint256 &checktxid)
{
    std::vector<uint8_t> vopret; uint8_t *script,e,f;
    GetOpReturnData(scriptPubKey, vopret);
    script = (uint8_t *)vopret.data();
    if ( vopret.size() > 2 && E_UNMARSHAL(vopret,ss >> e; ss >> f; ss >> checktxid) != 0 )
    {
        if ( e == EVAL_PAYMENTS && f == 'M' )
            return(f);
    }
    return(0);
}

CScript EncodePaymentsReleaseOpRet(uint256 checktxid, int64_t amountReleased)
{
    CScript opret; uint8_t evalcode = EVAL_PAYMENTS;
    opret << OP_RETURN << E_MARSHAL(ss << evalcode << 'R' << checktxid << amountReleased);
    return(opret);
}

uint8_t DecodePaymentsReleaseOpRet(CScript scriptPubKey,uint256 &checktxid,int64_t &amountReleased)
{
    std::vector<uint8_t> vopret; uint8_t *script,e,f;
    GetOpReturnData(scriptPubKey, vopret);
    script = (uint8_t *)vopret.data();
    if ( vopret.size() > 2 && E_UNMARSHAL(vopret,ss >> e; ss >> f; ss >> checktxid; ss >> amountReleased) != 0 )
    {
        if ( e == EVAL_PAYMENTS && f == 'R' )
            return(f);
    }
    return(0);
}

CScript EncodePaymentsOpRet(int32_t lockedblocks,int32_t minrelease,int64_t totalallocations,std::vector<uint256> txidoprets)
{
    CScript opret; uint8_t evalcode = EVAL_PAYMENTS;
    opret << OP_RETURN << E_MARSHAL(ss << evalcode << 'C' << lockedblocks << minrelease << totalallocations << txidoprets);
    return(opret);
}

uint8_t DecodePaymentsOpRet(CScript scriptPubKey,int32_t &lockedblocks,int32_t &minrelease,int64_t &totalallocations,std::vector<uint256> &txidoprets)
{
    std::vector<uint8_t> vopret; uint8_t *script,e,f;
    GetOpReturnData(scriptPubKey, vopret);
    script = (uint8_t *)vopret.data();
    if ( vopret.size() > 2 && E_UNMARSHAL(vopret,ss >> e; ss >> f; ss >> lockedblocks; ss >> minrelease; ss >> totalallocations; ss >> txidoprets) != 0 )
    {
        if ( e == EVAL_PAYMENTS && f == 'C' && txidoprets.size() > 1 )
            return(f);
    }
    return(0);
}

CScript EncodePaymentsSnapsShotOpRet(int32_t lockedblocks,int32_t minrelease,int32_t minimum,int32_t top,int32_t bottom,int8_t fixedAmount,std::vector<std::vector<uint8_t>> excludeScriptPubKeys)
{
    CScript opret; uint8_t evalcode = EVAL_PAYMENTS;
    opret << OP_RETURN << E_MARSHAL(ss << evalcode << 'S' << lockedblocks << minrelease << minimum << top << bottom << fixedAmount << excludeScriptPubKeys);
    return(opret);
}

uint8_t DecodePaymentsSnapsShotOpRet(CScript scriptPubKey,int32_t &lockedblocks,int32_t &minrelease,int32_t &minimum,int32_t &top,int32_t &bottom,int8_t &fixedAmount,std::vector<std::vector<uint8_t>> &excludeScriptPubKeys)
{
    std::vector<uint8_t> vopret; uint8_t *script,e,f;
    GetOpReturnData(scriptPubKey, vopret);
    script = (uint8_t *)vopret.data();
    if ( vopret.size() > 2 && E_UNMARSHAL(vopret,ss >> e; ss >> f; ss >> lockedblocks; ss >> minrelease; ss >> minimum; ss >> top; ; ss >> bottom; ss >> fixedAmount; ss >> excludeScriptPubKeys) != 0 )
    {
        if ( e == EVAL_PAYMENTS && f == 'S' )
            return(f);
    }
    return(0);
}

CScript EncodePaymentsTokensOpRet(int32_t lockedblocks,int32_t minrelease,int32_t minimum,int32_t top,int32_t bottom,int8_t fixedAmount,std::vector<std::vector<uint8_t>> excludeScriptPubKeys,uint256 tokenid)
{
    CScript opret; uint8_t evalcode = EVAL_PAYMENTS;
    opret << OP_RETURN << E_MARSHAL(ss << evalcode << 'O' << lockedblocks << minrelease << minimum << top << bottom << fixedAmount << excludeScriptPubKeys << tokenid);
    return(opret);
}

uint8_t DecodePaymentsTokensOpRet(CScript scriptPubKey,int32_t &lockedblocks,int32_t &minrelease,int32_t &minimum,int32_t &top,int32_t &bottom,int8_t &fixedAmount,std::vector<std::vector<uint8_t>> &excludeScriptPubKeys, uint256 &tokenid)
{
    std::vector<uint8_t> vopret; uint8_t *script,e,f;
    GetOpReturnData(scriptPubKey, vopret);
    script = (uint8_t *)vopret.data();
    if ( vopret.size() > 2 && E_UNMARSHAL(vopret,ss >> e; ss >> f; ss >> lockedblocks; ss >> minimum; ss >> top; ; ss >> bottom; ss >> fixedAmount; ss >> excludeScriptPubKeys; ss >> tokenid) != 0 )
    {
        if ( e == EVAL_PAYMENTS && f == 'O' )
            return(f);
    }
    return(0);
} 

int64_t IsPaymentsvout(struct CCcontract_info *cp,const CTransaction& tx,int32_t v,char *cmpaddr, CScript &ccopret)
{
    char destaddr[64];
    if ( getCCopret(tx.vout[v].scriptPubKey, ccopret) )
    {
        if ( Getscriptaddress(destaddr,tx.vout[v].scriptPubKey) > 0 && (cmpaddr[0] == 0 || strcmp(destaddr,cmpaddr) == 0) )
            return(tx.vout[v].nValue);
    }
    return(0);
}

bool payments_game(int32_t &top, int32_t &bottom)
{
    uint64_t x;
    uint256 tmphash = chainActive[lastSnapShotHeight]->GetBlockHash();
    memcpy(&x,&tmphash,sizeof(x));
    bottom = ((x & 0xff) % 50);
    if ( bottom == 0 ) bottom = 1;
    top = (((x>>8) & 0xff) % 100);
    if ( top < 50 ) top += 50;
    bottom = (vAddressSnapshot.size()*bottom)/100;
    top = (vAddressSnapshot.size()*top)/100;
    //fprintf(stderr, "bottom.%i top.%i\n",bottom,top);
    return true;
}

bool payments_lockedblocks(uint256 blockhash,int32_t lockedblocks,int32_t &blocksleft)
{
    int32_t ht = chainActive.Height();
    CBlockIndex* pblockindex = komodo_blockindex(blockhash);
    if ( pblockindex == 0 || pblockindex->GetHeight()+lockedblocks > ht)
    {
        blocksleft = pblockindex->GetHeight()+lockedblocks - ht;
        fprintf(stderr, "not elegible to be spent yet height.%i vs elegible_ht.%i blocksleft.%i\n",ht,(pblockindex!=0?pblockindex->GetHeight():0)+lockedblocks,blocksleft);
        return false; 
    }
    return true;
}

int32_t payments_getallocations(int32_t top, int32_t bottom, const std::vector<std::vector<uint8_t>> &excludeScriptPubKeys, mpz_t &mpzTotalAllocations, std::vector<CScript> &scriptPubKeys,  std::vector<int64_t> &allocations)
{
    mpz_t mpzAllocation; int32_t i =0;
    for (int32_t j = bottom; j < vAddressSnapshot.size(); j++)
    {
        auto &address = vAddressSnapshot[j];
        CScript scriptPubKey = GetScriptForDestination(address.second); 
        bool skip = false;
        // skip excluded addresses. 
        for ( auto skipkey : excludeScriptPubKeys ) 
        {
            if ( scriptPubKey == CScript(skipkey.begin(), skipkey.end()) )
                skip = true;
        }
        if ( !skip )
        {
            mpz_init(mpzAllocation); 
            i++;
            //fprintf(stderr, "address: %s nValue.%li \n", CBitcoinAddress(address.second).ToString().c_str(), address.first);
            scriptPubKeys.push_back(scriptPubKey);
            allocations.push_back(address.first);
            mpz_set_lli(mpzAllocation,address.first);
            mpz_add(mpzTotalAllocations,mpzTotalAllocations,mpzAllocation); 
            mpz_clear(mpzAllocation);
        }
        if ( i+bottom == top ) 
            break; // we reached top amount to pay, it can be less than this, if less address exist on chain, return the number we got.
    }
    return(i);
}

int32_t payments_gettokenallocations(int32_t top, int32_t bottom, const std::vector<std::vector<uint8_t>> &excludeScriptPubKeys, uint256 tokenid, mpz_t &mpzTotalAllocations, std::vector<CScript> &scriptPubKeys,  std::vector<int64_t> &allocations)
{
    /*
    - check tokenid exists.
    - iterate tokenid address and extract all pubkeys, add to map. 
    - rewind to last notarized height for balances? see main.cpp: line# 660.
    - convert balances to mpz_t and add up totalallocations
    - sort the map into a vector, then convert to the correct output.
    */
    return(0);
}

bool PaymentsValidate(struct CCcontract_info *cp,Eval* eval,const CTransaction &tx, uint32_t nIn)
{
    char temp[128], txidaddr[64]={0}; std::string scriptpubkey; uint256 createtxid, blockhash, tokenid; CTransaction plantx; int8_t funcid=0, fixedAmount=0;
    int32_t i,lockedblocks,minrelease,blocksleft,dust = 0, top,bottom=0,minimum=10000; int64_t change,totalallocations,actualtxfee,amountReleased=0; std::vector<uint256> txidoprets; bool fHasOpret = false,fIsMerge = false; CPubKey txidpk,Paymentspk;
    std::vector<std::vector<uint8_t>> excludeScriptPubKeys; bool fFixedAmount = false; CScript ccopret;
    mpz_t mpzTotalAllocations,mpzAllocation,mpzCheckamount;
    mpz_init(mpzCheckamount); mpz_init(mpzTotalAllocations);
    // Check change is in vout[0], and also fetch the ccopret to determine what type of tx this is. txidaddr is unknown, recheck this later.
    if ( (change= IsPaymentsvout(cp,tx,0,txidaddr,ccopret)) != 0 && ccopret.size() > 2 )
    {
        // get the checktxid and the amount released if doing release tx. 
        if ( DecodePaymentsMergeOpRet(ccopret,createtxid) == 'M' )
            fIsMerge = true;
        else if ( DecodePaymentsReleaseOpRet(ccopret,createtxid,amountReleased) != 'R' )
            return(eval->Invalid("could not decode ccopret"));
        if ( tx.vout.back().scriptPubKey.IsOpReturn() )
            fHasOpret = true;
        mpz_set_lli(mpzCheckamount,amountReleased); 
    } else return(eval->Invalid("could not decode ccopret"));
    
    // use the createtxid to fetch the tx and all of the plans info.
    if ( myGetTransaction(createtxid,plantx,blockhash) != 0 && plantx.vout.size() > 0 )
    {                                                                                                                        
        if ( ((funcid= DecodePaymentsOpRet(plantx.vout[plantx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,totalallocations,txidoprets)) == 'C' || (funcid= DecodePaymentsSnapsShotOpRet(plantx.vout[plantx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys)) == 'S' || (funcid= DecodePaymentsTokensOpRet(plantx.vout[plantx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys,tokenid)) == 'O') )
        {
            if ( lockedblocks < 0 || minrelease < 0 || (totalallocations <= 0 && top <= 0 ) )
                return(eval->Invalid("negative values"));
            if ( minimum < 10000 )
                return(eval->Invalid("minimum must be over 10000"));
            Paymentspk = GetUnspendable(cp,0);
            txidpk = CCtxidaddr(txidaddr,createtxid);
            GetCCaddress1of2(cp,txidaddr,Paymentspk,txidpk);
            //fprintf(stderr, "lockedblocks.%i minrelease.%i totalallocations.%i txidopret1.%s txidopret2.%s\n",lockedblocks, minrelease, totalallocations, txidoprets[0].ToString().c_str(), txidoprets[1].ToString().c_str() );
            if ( !CheckTxFee(tx, PAYMENTS_TXFEE+1, chainActive.LastTip()->GetHeight(), chainActive.LastTip()->nTime, actualtxfee) )
                return eval->Invalid("txfee is too high");
            // Check that the change vout is playing the txid address. 
            if ( IsPaymentsvout(cp,tx,0,txidaddr,ccopret) == 0 )
                return eval->Invalid("change pays wrong address");

            if ( !fIsMerge )
            {
                if ( amountReleased < minrelease*COIN )
                {
                    fprintf(stderr, "does not meet minrelease amount.%li minrelease.%li\n",amountReleased, (int64_t)minrelease*COIN);
                    return(eval->Invalid("amount is too small"));
                }
                // Get all the script pubkeys and allocations
                std::vector<int64_t> allocations;
                std::vector<CScript> scriptPubKeys;
                i = 0;
                if ( funcid == 'C' )
                {
                    // normal payment
                    int64_t checkallocations = 0;
                    for ( auto txidopret : txidoprets)
                    {
                        CTransaction tx0; std::vector<uint8_t> scriptPubKey,opret; int64_t allocation;
                        if ( myGetTransaction(txidopret,tx0,blockhash) != 0 && tx0.vout.size() > 1 && DecodePaymentsTxidOpRet(tx0.vout[tx0.vout.size()-1].scriptPubKey,allocation,scriptPubKey,opret) == 'T' )
                        {
                            scriptPubKeys.push_back(CScript(scriptPubKey.begin(), scriptPubKey.end()));
                            allocations.push_back(allocation);
                            //fprintf(stderr, "i.%i scriptpubkey.%s allocation.%li\n",i,scriptPubKeys[i].ToString().c_str(),allocation);
                            checkallocations += allocation;
                            // if we have an op_return to pay to need to check it exists and is paying the correct opret. 
                            if ( !opret.empty() )
                            {
                                if ( !fHasOpret )
                                {
                                    fprintf(stderr, "missing opret.%s in payments release.\n",HexStr(opret.begin(), opret.end()).c_str());
                                    return(eval->Invalid("missing opret in payments release"));
                                }
                                else if ( CScript(opret.begin(),opret.end()) != tx.vout[tx.vout.size()-1].scriptPubKey )
                                {
                                    fprintf(stderr, "opret.%s vs opret.%s\n",HexStr(opret.begin(), opret.end()).c_str(), HexStr(tx.vout[tx.vout.size()-1].scriptPubKey.begin(), tx.vout[tx.vout.size()-1].scriptPubKey.end()).c_str());
                                    return(eval->Invalid("pays incorrect opret"));
                                }
                            }
                        }
                        i++;
                    }
                    //fprintf(stderr, "totalallocations.%li checkallocations.%li\n",totalallocations, checkallocations);
                    if ( totalallocations != checkallocations )
                        return(eval->Invalid("allocation missmatch"));
                    mpz_set_lli(mpzTotalAllocations,totalallocations);
                }
                else if ( funcid == 'S' || funcid == 'O' )
                {
                    // snapshot payment
                    if ( KOMODO_SNAPSHOT_INTERVAL == 0 )
                        return(eval->Invalid("snapshots not activated on this chain"));
                    if ( vAddressSnapshot.size() == 0 )
                        return(eval->Invalid("need first snapshot"));
                    if ( top > 3999 )
                        return(eval->Invalid("transaction too big"));
                    if ( fixedAmount == 7 ) 
                    {
                        // game setting, randomise bottom and top values 
                        fFixedAmount = payments_game(top,bottom);
                    }
                    else if ( fixedAmount != 0 )
                    {
                        fFixedAmount = true;
                    }
                    if ( funcid == 'S' )
                        payments_getallocations(top, bottom, excludeScriptPubKeys, mpzTotalAllocations, scriptPubKeys, allocations);
                    else 
                    {
                        // token snapshot
                        // payments_gettokenallocations(top, bottom, excludeScriptPubKeys, tokenid, mpzTotalAllocations, scriptPubKeys, allocations);
                        return(eval->Invalid("tokens not yet implemented"));
                    }
                }
                // sanity check to make sure we got all the required info, skip for merge type tx
                //fprintf(stderr, " allocations.size().%li scriptPubKeys.size.%li\n",allocations.size(), scriptPubKeys.size());
                if ( (allocations.size() == 0 || scriptPubKeys.size() == 0 || allocations.size() != scriptPubKeys.size()) )
                    return(eval->Invalid("missing data cannot validate"));

                // Check vouts go to the right place and pay the right amounts. 
                int64_t amount = 0; int32_t n = 0; 
                // We place amount released into ccopret, so that these calcualtion are accurate! 
                // If you change the amount released in the RPC these calcs will be wrong, and validation will fail. 
                for (i = 1; i < (fHasOpret ? tx.vout.size()-1 : tx.vout.size()); i++) 
                {
                    int64_t test;
                    if ( scriptPubKeys[n] != tx.vout[i].scriptPubKey )
                    {
                        fprintf(stderr, "pays wrong destination destscriptPubKey.%s voutscriptPubKey.%s\n", HexStr(scriptPubKeys[n].begin(),scriptPubKeys[n].end()).c_str(), HexStr(tx.vout[i].scriptPubKey.begin(),tx.vout[i].scriptPubKey.end()).c_str());
                        return(eval->Invalid("pays wrong address"));
                    }
                    if ( fFixedAmount )
                    {
                        if ( (top-bottom) > 0 )
                            test = amountReleased / (top-bottom);
                        else 
                            return(eval->Invalid("top/bottom range is illegal"));
                    }
                    else 
                    {
                        mpz_init(mpzAllocation); 
                        mpz_set_lli(mpzAllocation,allocations[n]);
                        mpz_mul(mpzAllocation,mpzAllocation,mpzCheckamount);
                        mpz_tdiv_q(mpzAllocation,mpzAllocation,mpzTotalAllocations);
                        test = mpz_get_si2(mpzAllocation);
                        mpz_clear(mpzAllocation);
                    }
                    //fprintf(stderr, "vout.%i test.%lli vs nVlaue.%lli\n",i, (long long)test, (long long)tx.vout[i].nValue);
                    if ( test != tx.vout[i].nValue ) 
                    {
                        fprintf(stderr, "vout.%i test.%lli vs nVlaue.%lli\n",i, (long long)test, (long long)tx.vout[i].nValue);
                        return(eval->Invalid("amounts do not match"));
                    }
                    if ( test < minimum )
                    {
                        // prevent anyone being paid the minimum.
                        fprintf(stderr, "vout.%i test.%li vs minimum.%i\n",i, test, minimum);
                        return(eval->Invalid("under minimum size"));
                    }
                    amount += tx.vout[i].nValue;
                    n++;
                }
                if ( allocations.size() > n )
                {
                    // need to check that the next allocation was less than minimum, otherwise ppl can truncate the tx at any place not paying all elegible addresses. 
                    mpz_init(mpzAllocation); 
                    mpz_set_lli(mpzAllocation,allocations[n+1]);
                    mpz_mul(mpzAllocation,mpzAllocation,mpzCheckamount);
                    mpz_tdiv_q(mpzAllocation,mpzAllocation,mpzTotalAllocations);
                    int64_t test = mpz_get_si2(mpzAllocation);
                    //fprintf(stderr, "check next vout pays under min: test.%li > minimuim.%i\n", test, minimum);
                    if ( test > minimum )
                        return(eval->Invalid("next allocation was not under minimum"));
                }
                mpz_clear(mpzTotalAllocations); mpz_clear(mpzCheckamount);
            }
            // Check vins
            i = 0; 
            for (auto vin : tx.vin)
            {
                CTransaction txin; 
                if ( myGetTransaction(vin.prevout.hash,txin,blockhash) )
                {
                    // check the vin comes from the CC address's
                    char fromaddr[64]; int32_t mergeoffset = 0; CScript vinccopret; uint256 checktxid;
                    Getscriptaddress(fromaddr,txin.vout[vin.prevout.n].scriptPubKey);
                    if ( fIsMerge && txin.vout[vin.prevout.n].nValue < COIN )
                        dust++;
                    if ( IsPaymentsvout(cp,txin,vin.prevout.n,cp->unspendableCCaddr,vinccopret) != 0 )
                    {
                        // if from global payments address get ccopret to detemine pays correct plan.  
                        uint256 checktxid; 
                        if ( vinccopret.size() < 2 || DecodePaymentsFundOpRet(vinccopret,checktxid) != 'F' || checktxid != createtxid )
                        {
                            fprintf(stderr, "vin.%i is not a payments CC vout: txid.%s vout.%i\n", i, txin.GetHash().ToString().c_str(), vin.prevout.n);
                            return(eval->Invalid("vin is not paymentsCC type"));
                        }
                    }
                    else if ( IsPaymentsvout(cp,txin,vin.prevout.n,txidaddr,vinccopret) != 0 )
                    {
                        // if in txid address apply merge offset if applicable. 
                        if ( fIsMerge && vinccopret.size() > 2 && DecodePaymentsMergeOpRet(vinccopret,checktxid) == 'M' )
                        {
                            // Apply merge offset to locked blocks, this prevents people spaming payments fund and payments merge to prevent release happening. 
                            mergeoffset = PAYMENTS_MERGEOFSET;
                        }
                    } 
                    else  // not from global payments plan, or txid address.
                        return(eval->Invalid("utxo comes from incorrect address"));
                    // check the chain depth vs locked blocks requirement. 
                    if ( !payments_lockedblocks(blockhash, lockedblocks+mergeoffset, blocksleft) )
                    {
                        fprintf(stderr, "vin.%i is not elegible for.%i blocks \n",i, blocksleft);
                        return(eval->Invalid("vin not elegible"));
                    }
                    i++;
                } else return(eval->Invalid("cant get vin transaction"));
            }
            if ( fIsMerge )
            {
                if ( i < 2 )
                    return(eval->Invalid("must have at least 2 vins to carry out merge"));
                else if ( i == dust+1 )
                    return(eval->Invalid("cannot merge only dust"));
            }
        } else return(eval->Invalid("cannot decode create transaction"));
    } else return(eval->Invalid("could not get contract transaction"));
    return(true);
}
// end of consensus code

// helper functions for rpc calls in rpcwallet.cpp
int64_t AddPaymentsInputs(bool fLockedBlocks,int8_t GetBalance,struct CCcontract_info *cp,CMutableTransaction &mtx,CPubKey txidpk,int64_t total,int32_t maxinputs,uint256 createtxid,int32_t lockedblocks,int64_t minrelease,int32_t &blocksleft)
{
    char coinaddr[64]; CPubKey Paymentspk; int64_t nValue,threshold,price,totalinputs = 0; uint256 txid,checktxid,hashBlock; std::vector<uint8_t> origpubkey; CTransaction vintx; int32_t iter,vout,ht,n = 0;
    std::vector<std::pair<CAddressUnspentKey, CAddressUnspentValue> > unspentOutputs; CScript ccopret;
    std::vector<std::pair<int32_t,CAmount> > blocksleft_balance;
    if ( GetBalance == 0 )
    {
        if ( maxinputs > CC_MAXVINS )
            maxinputs = CC_MAXVINS;
        if ( maxinputs > 0 )
            threshold = total/maxinputs;
        else threshold = total;
    }
    else threshold = 0;
    Paymentspk = GetUnspendable(cp,0);
    for (iter=0; iter<2; iter++)
    {
        if ( GetBalance == 1 && iter == 1 )
            continue; // getbalance of global paymentsCC address.
        if ( GetBalance == 2 && iter == 0 )
            continue; // get balance of txidpk address. 
        if ( iter == 0 )
            GetCCaddress(cp,coinaddr,Paymentspk);
        else GetCCaddress1of2(cp,coinaddr,Paymentspk,txidpk);
        SetCCunspents(unspentOutputs,coinaddr,true);
        for (std::vector<std::pair<CAddressUnspentKey, CAddressUnspentValue> >::const_iterator it=unspentOutputs.begin(); it!=unspentOutputs.end(); it++)
        {
            txid = it->first.txhash;
            vout = (int32_t)it->first.index;
            //fprintf(stderr,"iter.%d %s/v%d %s\n",iter,txid.GetHex().c_str(),vout,coinaddr);
            if ( myGetTransaction(txid,vintx,hashBlock) != 0 )
            {
                if ( (nValue= IsPaymentsvout(cp,vintx,vout,coinaddr,ccopret)) > PAYMENTS_TXFEE && nValue >= threshold && myIsutxo_spentinmempool(ignoretxid,ignorevin,txid,vout) == 0 )
                {
                    int32_t offset = 0;
                    if ( ccopret.size() > 2 )
                    {
                        if ( iter == 0 && (DecodePaymentsFundOpRet(ccopret,checktxid) != 'F' || checktxid != createtxid) )
                        {
                            // global address but not for this plan.
                            fprintf(stderr,"bad opret %s vs %s\n",checktxid.GetHex().c_str(),createtxid.GetHex().c_str());
                            continue;
                        }
                        // increase merge offset, if this is a merge tx, merging merged utxos.
                        if ( iter == 1 && GetBalance == 4 && DecodePaymentsMergeOpRet(ccopret,checktxid) == 'M' )
                            offset = PAYMENTS_MERGEOFSET;
                    }
                    int32_t tmpblocksleft = 0;
                    if ( fLockedBlocks && !payments_lockedblocks(hashBlock, lockedblocks+offset, tmpblocksleft) )
                    {
                        blocksleft_balance.push_back(std::make_pair(tmpblocksleft,nValue));
                        continue;
                    }
                    if ( (GetBalance == 0 && total != 0 && maxinputs != 0) || GetBalance == 4 )
                        mtx.vin.push_back(CTxIn(txid,vout,CScript()));
                    nValue = it->second.satoshis;
                    if ( GetBalance == 4 && nValue < COIN )
                        blocksleft++; // count dust with unused variable.
                    if ( GetBalance == 2 || GetBalance == 1 )
                        blocksleft++; // count all utxos with unused variable.
                    totalinputs += nValue;
                    n++;
                    //fprintf(stderr,"iter.%d %s/v%d %s %.8f\n",iter,txid.GetHex().c_str(),vout,coinaddr,(double)nValue/COIN);
                    if ( GetBalance == 0 && ((total > 0 && totalinputs >= total) || (maxinputs > 0 && n >= maxinputs)) )
                        break; // create tx. We have ebnough inputs to make it. 
                } //else fprintf(stderr,"nValue %.8f vs threshold %.8f\n",(double)nValue/COIN,(double)threshold/COIN);
            }
        }
    }
    if ( GetBalance == 3 && totalinputs < minrelease ) // return elegible balance to be spent, and blocks left until min release can be released.
    {
        int64_t lockedblocks_balance = totalinputs; // inputs that can be spent already. 
        // sort utxos by blocks until able to be spent, smallest at top.
        std::sort(blocksleft_balance.begin(), blocksleft_balance.end());
        // iterate the utxos blocks left vector, to get block height min release is able to be released. 
        for ( auto utxo : blocksleft_balance )
        {
            lockedblocks_balance += utxo.second;
            if ( lockedblocks_balance >= minrelease )
            {
                blocksleft = utxo.first;
                break;
            }
        }
    }
    return(totalinputs);
}

UniValue payments_rawtxresult(UniValue &result,std::string rawtx,int32_t broadcastflag)
{
    CTransaction tx;
    if ( rawtx.size() > 0 )
    {
        result.push_back(Pair("hex",rawtx));
        if ( DecodeHexTx(tx,rawtx) != 0 )
        {
            if ( broadcastflag != 0 && myAddtomempool(tx) != 0 )
                RelayTransaction(tx);
            result.push_back(Pair("txid",tx.GetHash().ToString()));
            result.push_back(Pair("result","success"));
        } else result.push_back(Pair("error","decode hex"));
    } else result.push_back(Pair("error","couldnt finalize payments CCtx"));
    return(result);
}

cJSON *payments_reparse(int32_t *nump,char *jsonstr)
{
    cJSON *params=0; char *newstr; int32_t i,j;
    *nump = 0;
    if ( jsonstr != 0 )
    {
        if ( jsonstr[0] == '"' && jsonstr[strlen(jsonstr)-1] == '"' )
        {
            jsonstr[strlen(jsonstr)-1] = 0;
            jsonstr++;
        }
        newstr = (char *)malloc(strlen(jsonstr)+1);
        for (i=j=0; jsonstr[i]!=0; i++)
        {
            if ( jsonstr[i] == '%' && jsonstr[i+1] == '2' && jsonstr[i+2] == '2' )
            {
                newstr[j++] = '"';
                i += 2;
            }
            else if ( jsonstr[i] == '\'' )
                newstr[j++] = '"';
            else newstr[j++] = jsonstr[i];
        }
        newstr[j] = 0;
        params = cJSON_Parse(newstr);
        if ( 0 && params != 0 )
            printf("new.(%s) -> %s\n",newstr,jprint(params,0));
        free(newstr);
        *nump = cJSON_GetArraySize(params);
    }
    return(params);
}

uint256 payments_juint256(cJSON *obj)
{
    uint256 tmp; bits256 t = jbits256(obj,0);
    memcpy(&tmp,&t,sizeof(tmp));
    return(revuint256(tmp));
}

int32_t payments_parsehexdata(std::vector<uint8_t> &hexdata,cJSON *item,int32_t len)
{
    char *hexstr; int32_t val;
    if ( (hexstr= jstr(item,0)) != 0 && ((val= is_hexstr(hexstr,0)) == len*2 || (val > 0 && len == 0)) )
    {
        val >>= 1;
        hexdata.resize(val);
        decode_hex(&hexdata[0],val,hexstr);
        return(0);
    } else return(-1);
}

UniValue PaymentsRelease(struct CCcontract_info *cp,char *jsonstr)
{
    LOCK(cs_main);
    CMutableTransaction tmpmtx,mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(),komodo_nextheight()); UniValue result(UniValue::VOBJ); uint256 createtxid,hashBlock,tokenid;
    CTransaction tx,txO; CPubKey mypk,txidpk,Paymentspk; int32_t i,n,m,numoprets=0,lockedblocks,minrelease; int64_t newamount,inputsum,amount,CCchange=0,totalallocations=0,checkallocations=0,allocation; CTxOut vout; CScript onlyopret,ccopret; char txidaddr[64],destaddr[64]; std::vector<uint256> txidoprets;
    int32_t top,bottom=0,blocksleft=0,minimum=10000; std::vector<std::vector<uint8_t>> excludeScriptPubKeys; int8_t funcid,fixedAmount=0,skipminimum=0; bool fFixedAmount = false;
    mpz_t mpzTotalAllocations, mpzAllocation; mpz_init(mpzTotalAllocations);
    cJSON *params = payments_reparse(&n,jsonstr);
    mypk = pubkey2pk(Mypubkey());
    Paymentspk = GetUnspendable(cp,0);
    if ( params != 0 && n >= 2 )
    {
        createtxid = payments_juint256(jitem(params,0));
        amount = jdouble(jitem(params,1),0) * SATOSHIDEN + 0.0000000049;
        if ( n == 3 )
            skipminimum = juint(jitem(params,2),0);
        if ( myGetTransaction(createtxid,tx,hashBlock) != 0 && tx.vout.size() > 0 )
        {
            if ( ((funcid= DecodePaymentsOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,totalallocations,txidoprets)) == 'C' || (funcid= DecodePaymentsSnapsShotOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys)) == 'S' || (funcid= DecodePaymentsTokensOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys,tokenid)) == 'O') )
            {
                if ( lockedblocks < 0 || minrelease < 0 || (totalallocations <= 0 && top <= 0 ) )
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","negative parameter"));
                    if ( params != 0 )
                        free_json(params);
                    return(result);
                }
                // set minimum size to 10k sat otherwise the tx will be invalid.
                if ( minimum < 10000 )
                    minimum = 10000;
                if ( amount < minrelease*COIN )
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","amount too smal"));
                    result.push_back(Pair("amount",ValueFromAmount(amount)));
                    result.push_back(Pair("minrelease",ValueFromAmount(minrelease*COIN)));
                    if ( params != 0 )
                        free_json(params);
                    return(result);
                }
                txidpk = CCtxidaddr(txidaddr,createtxid);
                ccopret = EncodePaymentsReleaseOpRet(createtxid, amount);
                std::vector<std::vector<unsigned char>> vData = std::vector<std::vector<unsigned char>>();
                if ( makeCCopret(ccopret, vData) )
                    mtx.vout.push_back(MakeCC1of2vout(EVAL_PAYMENTS,0,Paymentspk,txidpk,&vData));
                //fprintf(stderr, "funcid.%i\n", funcid);
                if ( funcid == 'C' )
                {
                    // normal payments
                    m = txidoprets.size();
                    for (i=0; i<m; i++)
                    {
                        std::vector<uint8_t> scriptPubKey,opret;
                        vout.nValue = 0;
                        if ( myGetTransaction(txidoprets[i],txO,hashBlock) != 0 && txO.vout.size() > 1 && DecodePaymentsTxidOpRet(txO.vout[txO.vout.size()-1].scriptPubKey,allocation,scriptPubKey,opret) == 'T' )
                        {
                            vout.nValue = allocation;
                            vout.scriptPubKey.resize(scriptPubKey.size());
                            memcpy(&vout.scriptPubKey[0],&scriptPubKey[0],scriptPubKey.size());
                            checkallocations += allocation;
                            if ( opret.size() > 0 )
                            {
                                onlyopret.resize(opret.size());
                                memcpy(&onlyopret[0],&opret[0],opret.size());
                                numoprets++;
                            }
                        } else break;
                        mtx.vout.push_back(vout);
                    }
                    result.push_back(Pair("numoprets",(int64_t)numoprets));
                    if ( i != m )
                    {
                        result.push_back(Pair("result","error"));
                        result.push_back(Pair("error","invalid txidoprets[i]"));
                        result.push_back(Pair("txi",(int64_t)i));
                        if ( params != 0 )
                            free_json(params);
                        return(result);
                    }
                    else if ( checkallocations != totalallocations )
                    {
                        result.push_back(Pair("result","error"));
                        result.push_back(Pair("error","totalallocations mismatch"));
                        result.push_back(Pair("checkallocations",(int64_t)checkallocations));
                        result.push_back(Pair("totalallocations",(int64_t)totalallocations));
                        if ( params != 0 )
                            free_json(params);
                        return(result);
                    }
                    else if ( numoprets > 1 )
                    {
                        result.push_back(Pair("result","error"));
                        result.push_back(Pair("error","too many oprets"));
                        if ( params != 0 )
                            free_json(params);
                        return(result);
                    }
                    // set totalallocations to a mpz_t bignum, for amounts calculation later. 
                    mpz_set_lli(mpzTotalAllocations,totalallocations);
                }
                else if ( funcid == 'S' || funcid == 'O' )
                {
                    // normal snapshot
                    if ( vAddressSnapshot.size() == 0 )
                    {
                        result.push_back(Pair("result","error"));
                        result.push_back(Pair("error","first snapshot has not happened yet"));
                        if ( params != 0 )
                            free_json(params);
                        return(result);
                    }
                    if ( top > 3999 )
                    {
                        result.push_back(Pair("result","error"));
                        result.push_back(Pair("error","cannot pay more than 3999 addresses"));
                        if ( params != 0 )
                            free_json(params);
                        return(result);
                    }
                    if ( fixedAmount == 7 ) 
                    {
                        // game setting, randomise bottom and top values 
                        fFixedAmount = payments_game(top,bottom);
                    }
                    else if ( fixedAmount != 0 )
                    {
                        fFixedAmount = true;
                    }
                    if ( (top-bottom) < 0 )
                    {
                        result.push_back(Pair("result","error"));
                        result.push_back(Pair("error","invalid range top/bottom"));
                        if ( params != 0 )
                            free_json(params);
                        return(result);
                    }
                    
                    std::vector<int64_t> allocations;
                    std::vector<CScript> scriptPubKeys;
                    if ( funcid == 'S' )
                        m = payments_getallocations(top, bottom, excludeScriptPubKeys, mpzTotalAllocations, scriptPubKeys, allocations);
                    else 
                    {
                        // token snapshot
                        // payments_gettokenallocations(top, bottom, excludeScriptPubKeys, tokenid, mpzTotalAllocations, scriptPubKeys, allocations);
                    }
                    if ( (allocations.size() == 0 || scriptPubKeys.size() == 0 || allocations.size() != scriptPubKeys.size()) )
                    {
                        result.push_back(Pair("result","error"));
                        result.push_back(Pair("error","mismatched allocations, scriptpubkeys"));
                        if ( params != 0 )
                            free_json(params);
                        return(result);
                    }
                    i = 0;
                    for ( auto allocation : allocations )
                    {
                        vout.nValue = allocation; 
                        vout.scriptPubKey = scriptPubKeys[i];
                        mtx.vout.push_back(vout);
                        i++;
                    }
                }
                newamount = amount;
                int64_t totalamountsent = 0;
                mpz_t mpzAmount; mpz_init(mpzAmount); mpz_set_lli(mpzAmount,amount);
                for (i=0; i<m; i++)
                {
                    mpz_t mpzValue; mpz_init(mpzValue);
                    if ( fFixedAmount )
                        mtx.vout[i+1].nValue = amount / (top-bottom);
                    else 
                    {
                        mpz_set_lli(mpzValue,mtx.vout[i+1].nValue);
                        mpz_mul(mpzValue,mpzValue,mpzAmount); 
                        mpz_tdiv_q(mpzValue,mpzValue,mpzTotalAllocations); 
                        if ( mpz_fits_slong_p(mpzValue) ) 
                            mtx.vout[i+1].nValue = mpz_get_si2(mpzValue);
                        else
                        {
                            result.push_back(Pair("result","error"));
                            result.push_back(Pair("error","value too big, try releasing a smaller amount"));
                            if ( params != 0 )
                                free_json(params);
                            return(result);
                        } 
                    }
                    mpz_clear(mpzValue);
                    //fprintf(stderr, "[%i] nValue.%li minimum.%i scriptpubkey.%s\n", i, mtx.vout[i+1].nValue, minimum, HexStr(mtx.vout[i+1].scriptPubKey.begin(),mtx.vout[i+1].scriptPubKey.end()).c_str());
                    if ( mtx.vout[i+1].nValue < minimum )
                    {
                        if ( skipminimum == 0 )
                        {
                            result.push_back(Pair("result","error"));
                            result.push_back(Pair("error","value too small, try releasing a larger amount, or use skipminimum flag"));
                            if ( params != 0 )
                                free_json(params);
                            return(result);
                        } 
                        else 
                        {
                            // NOTE: should make this default behaviour.
                            // truncate off any vouts that are less than minimum. 
                            mtx.vout.resize(i+1);
                            break;
                        }
                    }
                    totalamountsent += mtx.vout[i+1].nValue;
                } 
                if ( totalamountsent < amount ) newamount = totalamountsent;
                //int64_t temptst = mpz_get_si2(mpzTotalAllocations);
                //fprintf(stderr, "checkamount RPC.%li totalallocations.%li\n",totalamountsent, temptst);
                mpz_clear(mpzAmount); mpz_clear(mpzTotalAllocations);
            }
            else
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","couldnt decode paymentscreate txid opret"));
                if ( params != 0 )
                    free_json(params);
                return(result);
            }
            if ( (inputsum= AddPaymentsInputs(true,0,cp,mtx,txidpk,newamount+2*PAYMENTS_TXFEE,CC_MAXVINS/2,createtxid,lockedblocks,minrelease,blocksleft)) >= newamount+2*PAYMENTS_TXFEE )
            {
                std::string rawtx;
                mtx.vout[0].nValue = inputsum - newamount - PAYMENTS_TXFEE; // only 1 txfee, so the minimum in this vout is a tx fee.
                GetCCaddress1of2(cp,destaddr,Paymentspk,txidpk);
                CCaddr1of2set(cp,Paymentspk,txidpk,cp->CCpriv,destaddr);
                rawtx = FinalizeCCTx(0,cp,mtx,mypk,PAYMENTS_TXFEE,onlyopret);
                if ( params != 0 )
                    free_json(params);
                result.push_back(Pair("amount",ValueFromAmount(amount)));
                result.push_back(Pair("newamount",ValueFromAmount(newamount)));
                return(payments_rawtxresult(result,rawtx,1));
            }
            else
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","couldnt find enough locked funds"));
            }
        }
        else
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","couldnt find paymentscreate txid"));
        }
    }
    else
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","parameters error"));
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsFund(struct CCcontract_info *cp,char *jsonstr)
{
    CMutableTransaction mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(), komodo_nextheight()); UniValue result(UniValue::VOBJ);
    CPubKey Paymentspk,mypk,txidpk; uint256 txid,hashBlock; int64_t amount,totalallocations; CScript opret; CTransaction tx; char txidaddr[64]; std::string rawtx; int32_t n,useopret = 0,broadcast=0,lockedblocks,minrelease; std::vector<uint256> txidoprets;
    int32_t top,bottom,minimum=10000; std::vector<std::vector<uint8_t>> excludeScriptPubKeys; // snapshot 
    uint256 tokenid; int8_t fixedAmount;
    cJSON *params = payments_reparse(&n,jsonstr);
    mypk = pubkey2pk(Mypubkey());
    Paymentspk = GetUnspendable(cp,0);
    if ( params != 0 && n > 1 && n <= 4 )
    {
        txid = payments_juint256(jitem(params,0));
        amount = jdouble(jitem(params,1),0) * SATOSHIDEN + 0.0000000049;
        if ( n == 3 )
            useopret = jint(jitem(params,2),0) != 0;
        if ( n == 4 )
            broadcast = jint(jitem(params,3),0) != 0;
        if ( myGetTransaction(txid,tx,hashBlock) == 0 || tx.vout.size() == 1 || (DecodePaymentsOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,totalallocations,txidoprets) == 0 && DecodePaymentsSnapsShotOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys) == 0 && DecodePaymentsTokensOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys,tokenid) == 0) )
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","invalid createtxid"));
        }
        else if ( AddNormalinputs(mtx,mypk,amount+PAYMENTS_TXFEE,60) > 0 )
        {
            if ( lockedblocks < 0 || minrelease < 0 || (totalallocations <= 0 && top <= 0 ) )
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","negative parameter"));
                if ( params != 0 )
                    free_json(params);
                return(result);
            }
            if ( useopret == 0 )
            {
                txidpk = CCtxidaddr(txidaddr,txid);
                mtx.vout.push_back(MakeCC1of2vout(EVAL_PAYMENTS,amount,Paymentspk,txidpk));
            }
            else
            {
                opret = EncodePaymentsFundOpRet(txid);
                std::vector<std::vector<unsigned char>> vData = std::vector<std::vector<unsigned char>>();
                if ( makeCCopret(opret, vData) )
                    mtx.vout.push_back(MakeCC1vout(EVAL_PAYMENTS,amount,Paymentspk,&vData));
            }
            rawtx = FinalizeCCTx(0,cp,mtx,mypk,PAYMENTS_TXFEE,CScript()); 
            if ( params != 0 )
                free_json(params); 
            return(payments_rawtxresult(result,rawtx,1));
        }
        else
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","couldnt find enough funds"));
        }
    }
    else
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","parameters error"));
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsMerge(struct CCcontract_info *cp,char *jsonstr)
{
    CMutableTransaction mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(), komodo_nextheight()); UniValue result(UniValue::VOBJ);
    CPubKey Paymentspk,mypk,txidpk; uint256 createtxid,hashBlock; int64_t inputsum,totalallocations=0; CScript opret; CTransaction tx; char txidaddr[64],destaddr[64]; std::string rawtx; 
    int32_t n,lockedblocks,minrelease,top,bottom,minimum=10000,blocksleft; std::vector<uint256> txidoprets;
    std::vector<std::vector<uint8_t>> excludeScriptPubKeys; // snapshot 
    uint256 tokenid; int8_t fixedAmount;
    cJSON *params = payments_reparse(&n,jsonstr);
    mypk = pubkey2pk(Mypubkey());
    Paymentspk = GetUnspendable(cp,0);
    if ( params != 0 && n == 1 )
    {
        createtxid = payments_juint256(jitem(params,0));
        txidpk = CCtxidaddr(txidaddr,createtxid);
        if ( myGetTransaction(createtxid,tx,hashBlock) == 0 || tx.vout.size() == 1 || (DecodePaymentsOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,totalallocations,txidoprets) == 0 && DecodePaymentsSnapsShotOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys) == 0 && DecodePaymentsTokensOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys,tokenid) == 0) )
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","invalid createtxid"));
        }
        else if ( (inputsum= AddPaymentsInputs(true,4,cp,mtx,txidpk,0,CC_MAXVINS,createtxid,lockedblocks,minrelease,blocksleft)) > 0 && mtx.vin.size() > 1 )
        {
            int32_t dust = blocksleft;
            if ( mtx.vin.size() == dust+1 )
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","cannot merge only dust"));
            } 
            else 
            { 
                // encode the checktxid into the end of the ccvout, along with 'M' to flag merge type tx. 
                opret = EncodePaymentsMergeOpRet(createtxid);
                std::vector<std::vector<unsigned char>> vData = std::vector<std::vector<unsigned char>>();
                if ( makeCCopret(opret, vData) )
                    mtx.vout.push_back(MakeCC1of2vout(EVAL_PAYMENTS,inputsum-PAYMENTS_TXFEE,Paymentspk,txidpk,&vData));
                GetCCaddress1of2(cp,destaddr,Paymentspk,txidpk);
                CCaddr1of2set(cp,Paymentspk,txidpk,cp->CCpriv,destaddr);
                rawtx = FinalizeCCTx(0,cp,mtx,mypk,PAYMENTS_TXFEE,CScript());
                if ( params != 0 )
                    free_json(params);
                return(payments_rawtxresult(result,rawtx,1));
            }
        }
        else
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","couldnt find enough funds"));
        }
    }
    else
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","parameters error"));
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsTxidopret(struct CCcontract_info *cp,char *jsonstr)
{
    CMutableTransaction mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(), komodo_nextheight()); UniValue result(UniValue::VOBJ); CPubKey mypk; std::string rawtx;
    std::vector<uint8_t> scriptPubKey,opret; int32_t n,retval0,retval1=0; int64_t allocation; CScript test; txnouttype whichType;
    cJSON *params = payments_reparse(&n,jsonstr);
    mypk = pubkey2pk(Mypubkey());
    if ( params != 0 && n > 1 && n <= 3 )
    {
        allocation = (int64_t)jint(jitem(params,0),0);
        std::string address; 
        address.append(jstri(params,1));
        CTxDestination destination = DecodeDestination(address);
        if ( IsValidDestination(destination) )
        {
            // its an address 
            test = GetScriptForDestination(destination);
            scriptPubKey = std::vector<uint8_t> (test.begin(),test.end());
        }
        else 
        {
            // its a scriptpubkey
            retval0 = payments_parsehexdata(scriptPubKey,jitem(params,1),0);
            test = CScript(scriptPubKey.begin(),scriptPubKey.end());
        }
        if (!::IsStandard(test, whichType))
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","scriptPubkey is not valid payment."));
        }
        else 
        {
            if ( n == 3 )
                retval1 = payments_parsehexdata(opret,jitem(params,2),0);
            if ( allocation > 0 && retval0 == 0 && retval1 == 0 && AddNormalinputs(mtx,mypk,PAYMENTS_TXFEE*2,10) > 0 )
            {
                rawtx = FinalizeCCTx(0,cp,mtx,mypk,PAYMENTS_TXFEE,EncodePaymentsTxidOpRet(allocation,scriptPubKey,opret));
                if ( params != 0 )
                    free_json(params);
                return(payments_rawtxresult(result,rawtx,1));
            }
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","invalid params or cant find txfee"));
        }
    }
    else
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","parameters error"));
        result.push_back(Pair("n",(int64_t)n));
        fprintf(stderr,"(%s) %p\n",jsonstr,params);
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsCreate(struct CCcontract_info *cp,char *jsonstr)
{
    CMutableTransaction mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(), komodo_nextheight());
    UniValue result(UniValue::VOBJ); CTransaction tx; CPubKey Paymentspk,mypk; char markeraddr[64]; std::vector<uint256> txidoprets; uint256 hashBlock; int32_t i,n,numoprets=0,lockedblocks,minrelease; std::string rawtx; int64_t totalallocations = 0;
    cJSON *params = payments_reparse(&n,jsonstr);
    if ( params != 0 && n >= 4 )
    {
        lockedblocks = juint(jitem(params,0),0);
        minrelease = juint(jitem(params,1),0);
        if ( lockedblocks < 0 || minrelease < 0 )
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","negative parameter"));
            if ( params != 0 )
                free_json(params);
            return(result);
        }
        for (i=0; i<n-2; i++)
            txidoprets.push_back(payments_juint256(jitem(params,2+i)));
        for (i=0; i<txidoprets.size(); i++)
        {
            std::vector<uint8_t> scriptPubKey,opret; int64_t allocation;
            //fprintf(stderr, "txid.%s\n",txidoprets[i].GetHex().c_str());
            if ( myGetTransaction(txidoprets[i],tx,hashBlock) != 0 && tx.vout.size() > 1 && DecodePaymentsTxidOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,allocation,scriptPubKey,opret) == 'T' )
            {
                totalallocations += allocation;
                if ( opret.size() > 0 )
                    numoprets++;
            }
            else
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","invalid txidopret"));
                result.push_back(Pair("txid",txidoprets[i].GetHex()));
                result.push_back(Pair("txi",(int64_t)i));
                if ( params != 0 )
                    free_json(params);
                return(result);
            }
        }
        if ( numoprets > 1 )
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","too many opreturns"));
            result.push_back(Pair("numoprets",(int64_t)numoprets));
            if ( params != 0 )
                free_json(params);
            return(result);
        }
        mypk = pubkey2pk(Mypubkey());
        Paymentspk = GetUnspendable(cp,0);
        if ( AddNormalinputs(mtx,mypk,2*PAYMENTS_TXFEE,60) > 0 )
        {
            mtx.vout.push_back(MakeCC1of2vout(cp->evalcode,PAYMENTS_TXFEE,Paymentspk,Paymentspk));
            rawtx = FinalizeCCTx(0,cp,mtx,mypk,PAYMENTS_TXFEE,EncodePaymentsOpRet(lockedblocks,minrelease,totalallocations,txidoprets));
            if ( params != 0 )
                free_json(params);
            return(payments_rawtxresult(result,rawtx,1));
        }
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","not enough normal funds"));
    }
    else
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","parameters error"));
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsAirdrop(struct CCcontract_info *cp,char *jsonstr)
{
    CMutableTransaction mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(), komodo_nextheight());
    UniValue result(UniValue::VOBJ); 
    uint256 hashBlock; CTransaction tx; CPubKey Paymentspk,mypk; char markeraddr[64]; std::string rawtx; 
    int32_t lockedblocks,minrelease,top,bottom,n,i,minimum=10000; std::vector<std::vector<uint8_t>> excludeScriptPubKeys; int8_t fixedAmount;
    if ( KOMODO_SNAPSHOT_INTERVAL == 0 )
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","cannot use airdrop wihtout -ac_snapshot set."));
        return(result);
    }
    cJSON *params = payments_reparse(&n,jsonstr);
    if ( params != 0 && n >= 5 )
    {
        lockedblocks = juint(jitem(params,0),0);
        minrelease = juint(jitem(params,1),0);
        minimum = juint(jitem(params,2),0);
        if ( minimum < 10000 ) minimum = 10000;
        top = juint(jitem(params,3),0);
        bottom = juint(jitem(params,4),0);
        fixedAmount = juint(jitem(params,5),0); // fixed amount is a flag, set to 7 does game mode, 0 normal snapshot, anything else fixed allocations. 
        if ( lockedblocks < 0 || minrelease < 0 || top <= 0 || bottom < 0 || minimum < 0 || fixedAmount < 0 || top > 3999 )
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","negative parameter, or top over 3999"));
            if ( params != 0 )
                free_json(params);
            return(result);
        }
        if ( top-bottom < 0 )
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","invalid range, top/bottom"));
            if ( params != 0 )
                free_json(params);
            return(result);
        }
        if ( n > 6 )
        {
            for (i=0; i<n-6; i++)
            {
                std::string address; 
                address.append(jstri(params,6+i));
                CTxDestination destination = DecodeDestination(address);
                if (!IsValidDestination(destination))
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","address is not valid."));
                    result.push_back(Pair("invalid_address",address));
                    if ( params != 0 )
                        free_json(params);
                    return(result);
                }
                std::vector<uint8_t> vscriptPubKey;
                CScript scriptPubKey = GetScriptForDestination(destination);
                vscriptPubKey.assign(scriptPubKey.begin(), scriptPubKey.end());
                excludeScriptPubKeys.push_back(vscriptPubKey);
            }
        }
        mypk = pubkey2pk(Mypubkey());
        Paymentspk = GetUnspendable(cp,0);
        if ( AddNormalinputs(mtx,mypk,2*PAYMENTS_TXFEE,60) > 0 )
        {
            mtx.vout.push_back(MakeCC1of2vout(cp->evalcode,PAYMENTS_TXFEE,Paymentspk,Paymentspk));
            CScript tempopret = EncodePaymentsSnapsShotOpRet(lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys);
            if ( tempopret.size() > 10000 ) // TODO: Check this!
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","op_return is too big, try with less exclude addresses."));
                if ( params != 0 )
                    free_json(params);
                return(result);
            }
            rawtx = FinalizeCCTx(0,cp,mtx,mypk,PAYMENTS_TXFEE,tempopret);
            if ( params != 0 )
                free_json(params);
            return(payments_rawtxresult(result,rawtx,1));
        } 
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","not enough normal funds"));
    }
    else
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","parameters error"));
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsAirdropTokens(struct CCcontract_info *cp,char *jsonstr)
{
    CMutableTransaction mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(), komodo_nextheight());
    UniValue result(UniValue::VOBJ); 
    uint256 hashBlock, tokenid = zeroid; CTransaction tx; CPubKey Paymentspk,mypk; char markeraddr[64]; std::string rawtx; 
    int32_t lockedblocks,minrelease,top,bottom,n,i,minimum=10000; std::vector<std::vector<uint8_t>> excludeScriptPubKeys; int8_t fixedAmount;
    cJSON *params = payments_reparse(&n,jsonstr);
    // disable for now. Need token snapshot function. 
    if ( 0 ) //params != 0 && n >= 6 )
    {
        tokenid = payments_juint256(jitem(params,0));
        lockedblocks = juint(jitem(params,1),0);
        minrelease = juint(jitem(params,2),0);
        minimum = juint(jitem(params,3),0);
        if ( minimum < 10000 ) minimum = 10000;
        top = juint(jitem(params,4),0);
        bottom = juint(jitem(params,5),0);
        fixedAmount = juint(jitem(params,6),0); // fixed amount is a flag, set to 7 does game mode, 0 normal snapshot, anything else fixed allocations. 
        if ( lockedblocks < 0 || minrelease < 0 || top <= 0 || bottom < 0 || minimum < 0 || fixedAmount < 0 || top > 3999 || tokenid == zeroid )
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","negative parameter, or top over 3999"));
            if ( params != 0 )
                free_json(params);
            return(result);
        }
        // TODO: lookup tokenid and make sure it exists. 
        if ( n > 7 )
        {
            for (i=0; i<n-7; i++)
            {
                // Change to pubkeys! tokens are owned by a pubkey not an address.
                std::string address; 
                address.append(jstri(params,7+i));
                CTxDestination destination = DecodeDestination(address);
                if (!IsValidDestination(destination))
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","address is not valid."));
                    result.push_back(Pair("invalid_address",address));
                    if ( params != 0 )
                        free_json(params);
                    return(result);
                }
                std::vector<uint8_t> vscriptPubKey;
                CScript scriptPubKey = GetScriptForDestination(destination);
                vscriptPubKey.assign(scriptPubKey.begin(), scriptPubKey.end());
                excludeScriptPubKeys.push_back(vscriptPubKey);
            }
        }
        mypk = pubkey2pk(Mypubkey());
        Paymentspk = GetUnspendable(cp,0);
        if ( AddNormalinputs(mtx,mypk,2*PAYMENTS_TXFEE,60) > 0 )
        {
            mtx.vout.push_back(MakeCC1of2vout(cp->evalcode,PAYMENTS_TXFEE,Paymentspk,Paymentspk));
            CScript tempopret = EncodePaymentsTokensOpRet(lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys,tokenid);
            if ( tempopret.size() > 10000 ) // TODO: Check this!
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","op_return is too big, try with less exclude pubkeys."));
                if ( params != 0 )
                    free_json(params);
                return(result);
            }
            rawtx = FinalizeCCTx(0,cp,mtx,mypk,PAYMENTS_TXFEE,tempopret);
            if ( params != 0 )
                free_json(params);
            return(payments_rawtxresult(result,rawtx,0));
        } 
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","not enough normal funds"));
    }
    else
    {
        result.push_back(Pair("result","error"));
        //result.push_back(Pair("error","parameters error"));
        result.push_back(Pair("error","tokens airdrop not yet impmlemented"));
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsInfo(struct CCcontract_info *cp,char *jsonstr)
{
    UniValue result(UniValue::VOBJ),a(UniValue::VARR); CTransaction tx,txO; CPubKey Paymentspk,txidpk; int32_t i,j,n,flag=0,numoprets=0,lockedblocks,minrelease,blocksleft=0; std::vector<uint256> txidoprets; int64_t funds,fundsopret,elegiblefunds,totalallocations=0,allocation; char fundsaddr[64],fundsopretaddr[64],txidaddr[64],*outstr; uint256 createtxid,hashBlock;
    int32_t top,bottom,minimum=10000; std::vector<std::vector<uint8_t>> excludeScriptPubKeys; // snapshot 
    uint256 tokenid; int8_t fixedAmount; CMutableTransaction mtx = CreateNewContextualCMutableTransaction(Params().GetConsensus(),komodo_nextheight());
    cJSON *params = payments_reparse(&n,jsonstr);
    if ( params != 0 && n == 1 )
    {
        Paymentspk = GetUnspendable(cp,0);
        createtxid = payments_juint256(jitem(params,0));
        if ( myGetTransaction(createtxid,tx,hashBlock) != 0 && tx.vout.size() > 0 )
        {
            if ( DecodePaymentsOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,totalallocations,txidoprets) != 0 )
            {
                if ( lockedblocks < 0 || minrelease < 0 || totalallocations <= 0 || txidoprets.size() < 2 )
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","negative parameter"));
                    if ( params != 0 )
                        free_json(params);
                    return(result);
                }
                result.push_back(Pair("plan_type","payments"));
                result.push_back(Pair("lockedblocks",(int64_t)lockedblocks));
                result.push_back(Pair("totalallocations",(int64_t)totalallocations));
                result.push_back(Pair("minrelease",(int64_t)minrelease));
                for (i=0; i<txidoprets.size(); i++)
                {
                    UniValue obj(UniValue::VOBJ); std::vector<uint8_t> scriptPubKey,opret;
                    obj.push_back(Pair("txid",txidoprets[i].GetHex()));
                    if ( myGetTransaction(txidoprets[i],txO,hashBlock) != 0 && txO.vout.size() > 1 && DecodePaymentsTxidOpRet(txO.vout[txO.vout.size()-1].scriptPubKey,allocation,scriptPubKey,opret) == 'T' )
                    {
                        outstr = (char *)malloc(2*(scriptPubKey.size() + opret.size()) + 1);
                        for (j=0; j<scriptPubKey.size(); j++)
                            sprintf(&outstr[j<<1],"%02x",scriptPubKey[j]);
                        outstr[j<<1] = 0;
                        //fprintf(stderr,"scriptPubKey.(%s)\n",outstr);
                        obj.push_back(Pair("scriptPubKey",outstr));
                        if ( opret.size() != 0 )
                        {
                            for (j=0; j<opret.size(); j++)
                                sprintf(&outstr[j<<1],"%02x",opret[j]);
                            outstr[j<<1] = 0;
                            //fprintf(stderr,"opret.(%s)\n",outstr);
                            obj.push_back(Pair("opreturn",outstr));
                            numoprets++;
                        }
                        free(outstr);
                    } else fprintf(stderr,"error decoding voutsize.%d\n",(int32_t)txO.vout.size());
                    a.push_back(obj);
                }
                result.push_back(Pair("numoprets",(int64_t)numoprets));
                if ( numoprets > 1 )
                {
                    flag++;
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","too many opreturns"));
                } else result.push_back(Pair("txidoprets",a));
            }
            else if ( DecodePaymentsSnapsShotOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys) != 0 )
            {
                if ( lockedblocks < 0 || minrelease < 0 || top <= 0 || bottom < 0 || fixedAmount < 0 || top > 3999 || minimum < 10000 )
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","negative parameter"));
                    if ( params != 0 )
                        free_json(params);
                    return(result);
                }
                if ( fixedAmount == 7 && payments_game(top,bottom))
                    result.push_back(Pair("plan_type","payments_game"));
                else 
                    result.push_back(Pair("plan_type","snapshot"));
                result.push_back(Pair("lockedblocks",(int64_t)lockedblocks));
                result.push_back(Pair("minrelease",(int64_t)minrelease));
                result.push_back(Pair("minimum",(int64_t)minimum));
                result.push_back(Pair("bottom",(int64_t)bottom));
                result.push_back(Pair("top",(int64_t)top));
                result.push_back(Pair("fixedFlag",(int64_t)fixedAmount));
                for ( auto scriptPubKey : excludeScriptPubKeys )
                {
                    CTxDestination dest;
                    if ( ExtractDestination(CScript(scriptPubKey.begin(),scriptPubKey.end()), dest) )
                        a.push_back(CBitcoinAddress(dest).ToString());
                }
                result.push_back(Pair("excludeAddresses",a));
            }
            else if ( DecodePaymentsTokensOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys,tokenid) != 0 )
            {
                if ( lockedblocks < 0 || minrelease < 0 || top <= 0 )
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","negative parameter"));
                    if ( params != 0 )
                        free_json(params);
                    return(result);
                }
                result.push_back(Pair("plan_type","token snapshot"));
                result.push_back(Pair("lockedblocks",(int64_t)lockedblocks));
                result.push_back(Pair("minrelease",(int64_t)minrelease));
                result.push_back(Pair("top",(int64_t)top));
                result.push_back(Pair("tokenid",tokenid.ToString()));
                // TODO: show pubkeys instead of scriptpubkeys
                for ( auto scriptPubKey : excludeScriptPubKeys )
                    a.push_back(HexStr(scriptPubKey.begin(),scriptPubKey.end()));
                result.push_back(Pair("excludeScriptPubkeys",a));
            }
            else
            {
                result.push_back(Pair("result","error"));
                result.push_back(Pair("error","couldnt decode valid payments create txid opreturn"));
            }
            if ( flag == 0 )
            {
                txidpk = CCtxidaddr(txidaddr,createtxid);
                GetCCaddress1of2(cp,fundsaddr,Paymentspk,txidpk);
                blocksleft = 0;
                funds = AddPaymentsInputs(false,2,cp,mtx,txidpk,0,CC_MAXVINS,createtxid,lockedblocks,minrelease,blocksleft);
                result.push_back(Pair(fundsaddr,ValueFromAmount(funds)));
                result.push_back(Pair("utxos", (int64_t)blocksleft));
                blocksleft = 0;
                GetCCaddress(cp,fundsopretaddr,Paymentspk);
                fundsopret = AddPaymentsInputs(false,1,cp,mtx,txidpk,0,CC_MAXVINS,createtxid,lockedblocks,minrelease,blocksleft);
                result.push_back(Pair(fundsopretaddr,ValueFromAmount(fundsopret)));
                result.push_back(Pair("utxos", (int64_t)blocksleft));
                result.push_back(Pair("totalfunds",ValueFromAmount(funds+fundsopret)));
                // Blocks until minrelease can be released. 
                elegiblefunds = AddPaymentsInputs(true,3,cp,mtx,txidpk,0,CC_MAXVINS,createtxid,lockedblocks,minrelease,blocksleft);
                result.push_back(Pair("elegiblefunds",ValueFromAmount(elegiblefunds)));
                result.push_back(Pair("min_release_height",chainActive.Height()+blocksleft));
                result.push_back(Pair("result","success"));
            }
        }
        else 
        {
            result.push_back(Pair("result","error"));
            result.push_back(Pair("error","couldnt find valid payments create txid"));
        }
    }
    else
    {
        result.push_back(Pair("result","error"));
        result.push_back(Pair("error","parameters error"));
    }
    if ( params != 0 )
        free_json(params);
    return(result);
}

UniValue PaymentsList(struct CCcontract_info *cp,char *jsonstr)
{
    std::vector<std::pair<CAddressIndexKey, CAmount> > addressIndex; uint256 txid,hashBlock,tokenid;
    UniValue result(UniValue::VOBJ),a(UniValue::VARR); char markeraddr[64],str[65]; CPubKey Paymentspk; CTransaction tx; int32_t lockedblocks,minrelease; std::vector<uint256> txidoprets; int64_t totalallocations=0;
    int32_t top=0,bottom=0,minimum=10000; std::vector<std::vector<uint8_t>> excludeScriptPubKeys; int8_t fixedAmount = 0;
    Paymentspk = GetUnspendable(cp,0);
    GetCCaddress1of2(cp,markeraddr,Paymentspk,Paymentspk);
    SetCCtxids(addressIndex,markeraddr,true);
    for (std::vector<std::pair<CAddressIndexKey, CAmount> >::const_iterator it=addressIndex.begin(); it!=addressIndex.end(); it++)
    {
        txid = it->first.txhash;
        if ( it->first.index == 0 && myGetTransaction(txid,tx,hashBlock) != 0 )
        {
            if ( tx.vout.size() > 0 && (DecodePaymentsOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,totalallocations,txidoprets) == 'C' || DecodePaymentsSnapsShotOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys) == 'S' || DecodePaymentsTokensOpRet(tx.vout[tx.vout.size()-1].scriptPubKey,lockedblocks,minrelease,minimum,top,bottom,fixedAmount,excludeScriptPubKeys,tokenid) == 'O') )
            {
                if ( lockedblocks < 0 || minrelease < 0 || (totalallocations <= 0 && top <= 0 ) || bottom < 0 || fixedAmount < 0 || minimum < 10000 )
                {
                    result.push_back(Pair("result","error"));
                    result.push_back(Pair("error","negative parameter"));
                    return(result);
                }
                a.push_back(uint256_str(str,txid));
            }
        }
    }
    result.push_back(Pair("result","success"));
    result.push_back(Pair("createtxids",a)); 
    return(result); 
}