Topic: [ADMT] Coin has an exploitive hidden premine - page 5. (Read 8614 times)

adamantiumcoin https://bitcointalk.org/index.php?topic=829498.0

Heritage: HACK, DRM

Problems:

* CRITICAL: Reward for block 22 can be any amount that is desired 
** The block explorer is compromised or the coin is serrepticious enough that it causes the block explorer to lie
** http://104.131.48.111:7200/block/00000283b17dbaa7445d64c988dcb7e58227ba49b686e029bbaf81bf67224993

review stopped at this point and early notice given to exchanges and miners. 

Notes:

node:     	{"108.170.2.13", "108.170.2.13"},

this is where the dev allows a block with non-standard reward to be mined
@@ -1582,7 +1583,7 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
     {
         int64_t nReward = GetProofOfWorkReward(nFees);
         // Check coinbase reward
-        if (vtx[0].GetValueOut() > nReward)
+        if (vtx[0].GetValueOut() > nReward && pindexBest->nHeight+1!=22)
             return DoS(50, error("ConnectBlock() : coinbase reward exceeded (actual=%"PRId64" vs calculated=%"PRId64")",
                    vtx[0].GetValueOut(),
                    nReward));

a variable used
@@ -330,6 +332,7 @@ bool CTransaction::IsStandard() const
 // expensive-to-check-upon-redemption script like:
 //   DUP CHECKSIG DROP ... repeated 100 times... OP_1
 //
+int64_t nvout=2000000000000000;

here is where the dev hides the amount in supply for RPC calls
@@ -1618,6 +1620,10 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
 
     // Update block index on disk without changing it in memory.
     // The memory index structure will be changed after the db commits.
+    if(pindexBest->nHeight+1 == 22) {
+    pindex->nMint = nValueOut - nValueIn + nFees - nvout;
+    pindex->nMoneySupply = (pindex->pprev? pindex->pprev->nMoneySupply : 0) + nValueOut - nValueIn - nvout;
+    }  

here is where he hides the amount mined with the generation transaction causing both my own block explorer, and Abe to report it wrongly
+++ b/rpcrawtransaction.cpp
@@ -74,7 +74,12 @@ void TxToJSON(const CTransaction& tx, const uint256 hashBlock, Object& entry)
     {
         const CTxOut& txout = tx.vout[i];
         Object out;
+        if(tx.GetHash().GetHex() == "f48435e7305419f3fb4db67de5eca21bdd92a44babe7f056dfbeb1b7600d4c4e") {
+            out.push_back(Pair("value",0.00000000));
+        }
+        else {
         out.push_back(Pair("value", ValueFromAmount(txout.nValue)));
+    }

Here is block 22 when these transaction hiding bits are removed:
[earlz@li67-111 src]$ ./AdamantiumCoind getblockbynumber 22 true
{
    "hash" : "00000283b17dbaa7445d64c988dcb7e58227ba49b686e029bbaf81bf67224993",
    "confirmations" : 596,
    "size" : 175,
    "height" : 22,
    "version" : 6,
    "merkleroot" : "f48435e7305419f3fb4db67de5eca21bdd92a44babe7f056dfbeb1b7600d4c4e",
    "mint" : 0.00000000,
    "time" : 1413949218,
    "nonce" : 7462376,
    "bits" : "1e02bf73",
    "difficulty" : 0.00142155,
    "blocktrust" : "5d29ee",
    "chaintrust" : "3b4a09d",
    "previousblockhash" : "000001f2f69d68be7ec69dd877f801963a823bf31691d69c5180c564d9d21d2f",
    "nextblockhash" : "000000bc54ac049a0c01fd2d3be098b08247bc16df20f1101a9b631a85f7f2fa",
    "flags" : "proof-of-work",
    "proofhash" : "00000283b17dbaa7445d64c988dcb7e58227ba49b686e029bbaf81bf67224993",
    "entropybit" : 1,
    "modifier" : "00000000001cb4ed",
    "modifierchecksum" : "8cbc4017",
    "tx" : [
        {
            "txid" : "f48435e7305419f3fb4db67de5eca21bdd92a44babe7f056dfbeb1b7600d4c4e",
            "txid" : "f48435e7305419f3fb4db67de5eca21bdd92a44babe7f056dfbeb1b7600d4c4e",
            "version" : 1,
            "time" : 1413949218,
            "locktime" : 0,
            "vin" : [
                {
                    "coinbase" : "01160101",
                    "sequence" : 4294967295
                }
            ],
            "vout" : [
                {
                    "value" : 20000000.00000000,
                    "n" : 0,
                    "scriptPubKey" : {
                        "asm" : "OP_DUP OP_HASH160 e829b472157a48cf939a76e66ac710c8d3898d95 OP_EQUALVERIFY OP_CHECKSIG",
                        "reqSigs" : 1,
                        "type" : "pubkeyhash",
                        "addresses" : [
                            "AcwSNi1VZ41WLErCguXiTh9d9Q9CjEQ1rB"
                        ]
                    }
                }
            ]
        }
    ]
}



Watermarks: uint64_t, pos, drm-like