hush3/src/cc/CCutils.cpp

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 * Copyright © 2014-2018 The SuperNET Developers.                             *
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 * See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at                  *
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#include "CCinclude.h"

/*
 CCutils has low level functions that are universally useful for all contracts.
 */

CC* GetCryptoCondition(CScript const& scriptSig)
{
    auto pc = scriptSig.begin();
    opcodetype opcode;
    std::vector<unsigned char> ffbin;
    if (scriptSig.GetOp(pc, opcode, ffbin))
        return cc_readFulfillmentBinary((uint8_t*)ffbin.data(), ffbin.size()-1);
}

bool IsCCInput(CScript const& scriptSig)
{
    CC *cond;
    if ( (cond= GetCryptoCondition(scriptSig)) == 0 )
        return false;
    cc_free(cond);
    return true;
}

bool IsEvalInput(uint8_t evalcode,CScript const& scriptSig)
{
    CC *cond;
    if (!(cond = GetCryptoCondition(scriptSig)))
        return false;
    // Recurse the CC tree to find asset condition
    auto findEval = [&] (CC *cond, struct CCVisitor _) {
        bool r = cc_typeId(cond) == CC_Eval && cond->codeLength == 1 && cond->code[0] == evalcode;
        // false for a match, true for continue
        return r ? 0 : 1;
    };
    CCVisitor visitor = {findEval, (uint8_t*)"", 0, NULL};
    bool out =! cc_visit(cond, visitor);
    cc_free(cond);
    return out;
}

uint256 revuint256(uint256 txid)
{
    uint256 revtxid; int32_t i;
    for (i=31; i>=0; i--)
        ((uint8_t *)&revtxid)[31-i] = ((uint8_t *)&txid)[i];
    return(revtxid);
}

char *uint256_str(char *dest,uint256 txid)
{
    int32_t i,j=0;
    for (i=31; i>=0; i--)
        sprintf(&dest[j++ * 2],"%02x",((uint8_t *)&txid)[i]);
   return(dest);
}

uint256 Parseuint256(char *hexstr)
{
    uint256 txid; int32_t i; std::vector<unsigned char> txidbytes(ParseHex(hexstr));
    for (i=31; i>=0; i--)
        ((uint8_t *)&txid)[31-i] = ((uint8_t *)txidbytes.data())[i];
    return(txid);
}

bool Getscriptaddress(char *destaddr,const CScript &scriptPubKey)
{
    CTxDestination address; txnouttype whichType;
    if ( ExtractDestination(scriptPubKey,address) != 0 )
    {
        strcpy(destaddr,(char *)CBitcoinAddress(address).ToString().c_str());
        return(true);
    }
    fprintf(stderr,"ExtractDestination failed\n");
    return(false);
}

std::vector<uint8_t> Mypubkey()
{
    extern uint8_t NOTARY_PUBKEY33[33];
    std::vector<uint8_t> pubkey; int32_t i; uint8_t *dest,*pubkey33;
    pubkey33 = NOTARY_PUBKEY33;
    pubkey.resize(33);
    dest = pubkey.data();
    for (i=0; i<33; i++)
        dest[i] = pubkey33[i];
    return(pubkey);
}

bool Myprivkey(uint8_t myprivkey[])
{
    char coinaddr[64]; std::string strAddress; char *dest; int32_t i,n; CBitcoinAddress address; CKeyID keyID; CKey vchSecret;
    if ( Getscriptaddress(coinaddr,CScript() << Mypubkey() << OP_CHECKSIG) != 0 )
    {
        n = (int32_t)strlen(coinaddr);
        strAddress.resize(n+1);
        dest = (char *)strAddress.data();
        for (i=0; i<n; i++)
            dest[i] = coinaddr[i];
        dest[i] = 0;
        if ( address.SetString(strAddress) != 0 && address.GetKeyID(keyID) != 0 )
        {
#ifdef ENABLE_WALLET
            if ( pwalletMain->GetKey(keyID,vchSecret) != 0 )
            {
                memcpy(myprivkey,vchSecret.begin(),32);
                //for (i=0; i<32; i++)
                //    fprintf(stderr,"%02x",myprivkey[i]);
                //fprintf(stderr," found privkey!\n");
                return(true);
            }
#endif
        }
    }
    fprintf(stderr,"privkey for the -pubkey= address is not in the wallet, importprivkey!\n");
    return(false);
}