Bitcoin Forum

The PPC price is still low, even after successful protocol update. You can bay at bitparking

As a matter of fact you should wait for the protocol update. And for proper revision. Last time I checked it's not an easy fix.

I've read though it, it looks easy enough? Or did I miss something?

Andy

SOLVED!!

The solution involves patching PPCoin. I will put in the suggestion in github.

Basically it involves changing the base58.h file.Litecoin has an altered base58.h, and it appears that the file has to be changed whenever using a address version above 00.

In Base58.h

Code:
public:
    void SetSecret(const CSecret& vchSecret, bool fCompressed)
    {
        assert(vchSecret.size() == 32);
        SetData(fTestNet ? 239 : 128, &vchSecret[0], vchSecret.size());
        if (fCompressed)

Change the 239 to 245 (Testnet 128+117) 128 to 183 (Livenet 128+55)
Code:
public:
    void SetSecret(const CSecret& vchSecret, bool fCompressed)
    {
        assert(vchSecret.size() == 32);
        SetData(fTestNet ? 245 : 183, &vchSecret[0], vchSecret.size());
        if (fCompressed)

And again in here

Code:
bool IsValid() const
    {
        bool fExpectTestNet = false;
        switch(nVersion)
        {
            case 128:
                break;

            case 239:
                fExpectTestNet = true;
                break;

to:

Code:
bool IsValid() const
    {
        bool fExpectTestNet = false;
        switch(nVersion)
        {
            case 183:
                break;

            case 245:
                fExpectTestNet = true;
                break;

Thanks for the investigation of the compatibility issue with vanitygen. I have received the pull request and will give it a review by this weekend.

Good job!

Did I miss a publication or a preliminary release of the source code? Can you post a reference?

There are multiple problems with the stake implementation right now. The two most pressing ones are
1) The ability to augment POS generation by computational power (it's devastating effect is mostly negated by checkpoints)
2) The ability to use the same stake in alternate branches of the blockchain. So there's no penalty/incentive to decide a priori for a specific branch, lowering the attack cost for a double spent to zero.

Your second point is often argued against proof-of-stake, but I think it is already explained well in the bitcoin wiki article on proof-of-stake. Such attacks on block chain could result in real losses of the currency holding itself, even though in terms of ppcoin unit the holding is the same, but in terms of other currencies the attackers would suffer large loss due to the loss of confidence of the coin. So no, such attack is not 'cost-free'.