Пример #1
0
/**
 * Used by addmultisigaddress / createmultisig:
 */
CScript _createmultisig_redeemScript(CWallet * const pwallet, const UniValue& params)
{
    int nRequired = params[0].get_int();
    const UniValue& keys = params[1].get_array();

    // Gather public keys
    if (nRequired < 1)
        throw std::runtime_error("a multisignature address must require at least one key to redeem");
    if ((int)keys.size() < nRequired)
        throw std::runtime_error(
            strprintf("not enough keys supplied "
                      "(got %u keys, but need at least %d to redeem)", keys.size(), nRequired));
    if (keys.size() > 16)
        throw std::runtime_error("Number of addresses involved in the multisignature address creation > 16\nReduce the number");
    std::vector<CPubKey> pubkeys;
    pubkeys.resize(keys.size());
    for (unsigned int i = 0; i < keys.size(); i++)
    {
        const std::string& ks = keys[i].get_str();
#ifdef ENABLE_WALLET
        // Case 1: Bitcoin address and we have full public key:
        CBitcoinAddress address(ks);
        if (pwallet && address.IsValid()) {
            CKeyID keyID;
            if (!address.GetKeyID(keyID))
                throw std::runtime_error(
                    strprintf("%s does not refer to a key",ks));
            CPubKey vchPubKey;
            if (!pwallet->GetPubKey(keyID, vchPubKey)) {
                throw std::runtime_error(
                    strprintf("no full public key for address %s",ks));
            }
            if (!vchPubKey.IsFullyValid())
                throw std::runtime_error(" Invalid public key: "+ks);
            pubkeys[i] = vchPubKey;
        }

        // Case 2: hex public key
        else
#endif
        if (IsHex(ks))
        {
            CPubKey vchPubKey(ParseHex(ks));
            if (!vchPubKey.IsFullyValid())
                throw std::runtime_error(" Invalid public key: "+ks);
            pubkeys[i] = vchPubKey;
        }
        else
        {
            throw std::runtime_error(" Invalid public key: "+ks);
        }
    }
    CScript result = GetScriptForMultisig(nRequired, pubkeys);

    if (result.size() > MAX_SCRIPT_ELEMENT_SIZE)
        throw std::runtime_error(
                strprintf("redeemScript exceeds size limit: %d > %d", result.size(), MAX_SCRIPT_ELEMENT_SIZE));

    return result;
}
Пример #2
0
// Creates a multisig redeemscript from a given list of public keys and number required.
CScript CreateMultisigRedeemscript(const int required, const std::vector<CPubKey>& pubkeys)
{
    // Gather public keys
    if (required < 1) {
        throw JSONRPCError(RPC_INVALID_PARAMETER, "a multisignature address must require at least one key to redeem");
    }
    if ((int)pubkeys.size() < required) {
        throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("not enough keys supplied (got %u keys, but need at least %d to redeem)", pubkeys.size(), required));
    }
    if (pubkeys.size() > 16) {
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Number of keys involved in the multisignature address creation > 16\nReduce the number");
    }

    CScript result = GetScriptForMultisig(required, pubkeys);

    if (result.size() > MAX_SCRIPT_ELEMENT_SIZE) {
        throw JSONRPCError(RPC_INVALID_PARAMETER, (strprintf("redeemScript exceeds size limit: %d > %d", result.size(), MAX_SCRIPT_ELEMENT_SIZE)));
    }

    return result;
}
Пример #3
0
static void MutateTxAddOutMultiSig(CMutableTransaction& tx, const std::string& strInput)
{
    // Separate into VALUE:REQUIRED:NUMKEYS:PUBKEY1:PUBKEY2:....[:FLAGS]
    std::vector<std::string> vStrInputParts;
    boost::split(vStrInputParts, strInput, boost::is_any_of(":"));

    // Check that there are enough parameters
    if (vStrInputParts.size()<3)
        throw std::runtime_error("Not enough multisig parameters");

    // Extract and validate VALUE
    CAmount value = ExtractAndValidateValue(vStrInputParts[0]);

    // Extract REQUIRED
    uint32_t required = stoul(vStrInputParts[1]);

    // Extract NUMKEYS
    uint32_t numkeys = stoul(vStrInputParts[2]);

    // Validate there are the correct number of pubkeys
    if (vStrInputParts.size() < numkeys + 3)
        throw std::runtime_error("incorrect number of multisig pubkeys");

    if (required < 1 || required > 20 || numkeys < 1 || numkeys > 20 || numkeys < required)
        throw std::runtime_error("multisig parameter mismatch. Required " \
                            + std::to_string(required) + " of " + std::to_string(numkeys) + "signatures.");

    // extract and validate PUBKEYs
    std::vector<CPubKey> pubkeys;
    for(int pos = 1; pos <= int(numkeys); pos++) {
        CPubKey pubkey(ParseHex(vStrInputParts[pos + 2]));
        if (!pubkey.IsFullyValid())
            throw std::runtime_error("invalid TX output pubkey");
        pubkeys.push_back(pubkey);
    }

    // Extract FLAGS
    bool bSegWit = false;
    bool bScriptHash = false;
    if (vStrInputParts.size() == numkeys + 4) {
        std::string flags = vStrInputParts.back();
        bSegWit = (flags.find('W') != std::string::npos);
        bScriptHash = (flags.find('S') != std::string::npos);
    }
    else if (vStrInputParts.size() > numkeys + 4) {
        // Validate that there were no more parameters passed
        throw std::runtime_error("Too many parameters");
    }

    CScript scriptPubKey = GetScriptForMultisig(required, pubkeys);

    if (bSegWit) {
        for (CPubKey& pubkey : pubkeys) {
            if (!pubkey.IsCompressed()) {
                throw std::runtime_error("Uncompressed pubkeys are not useable for SegWit outputs");
            }
        }
        // Call GetScriptForWitness() to build a P2WSH scriptPubKey
        scriptPubKey = GetScriptForWitness(scriptPubKey);
    }
    if (bScriptHash) {
        if (scriptPubKey.size() > MAX_SCRIPT_ELEMENT_SIZE) {
            throw std::runtime_error(strprintf(
                        "redeemScript exceeds size limit: %d > %d", scriptPubKey.size(), MAX_SCRIPT_ELEMENT_SIZE));
        }
        // Get the ID for the script, and then construct a P2SH destination for it.
        scriptPubKey = GetScriptForDestination(CScriptID(scriptPubKey));
    }

    // construct TxOut, append to transaction output list
    CTxOut txout(value, scriptPubKey);
    tx.vout.push_back(txout);
}