How to add premine in the bitcoin source

nc50lc

legendary

Activity: 2534

Merit: 6080

Self-proclaimed Genius

The problem is that the coinbase transaction that he's trying to spend isn't the genesis block's.
He specifically set the block at height 4 to have a 1,000,000,000BTC reward and he's unable to spend it.

I can only suggest him to try it with 'regtest' first but I suppose he already did that.

Heisenberg_Hunter

legendary

Activity: 1584

Merit: 1280

Heisenberg Design Services

Guess I have answered a question of yours about building litecoin wallet way back in September last year. If you are running a cloned copy of original bitcoin code (I assume you are doing the same) you wouldn't be able to spend the genesis block coins. This was a feature which was included right from the original code by satoshi himself. If satoshi was to spend the coins from genesis block, the nodes would reject such a transaction today and this is how it was programmed. To make the genesis block coins spendable, you should probably try this out :

As for the latest version of Bitcoin Core 0.19.0.1 is concerned, the code for making the genesis block spendable is available in validation.cpp #L1936

Code:

// Special case for the genesis block, skipping connection of its transactions
// (its coinbase is unspendable)
if (block.GetHash() == chainparams.GetConsensus().hashGenesisBlock) {
if (!fJustCheck)
view.SetBestBlock(pindex->GetBlockHash());
return true;
}

Delete the return true; piece of line or comment the whole line. Last year, I got to read a post from stackexchange which indeed made the genesis block spendable via a fork. Will try to search them up and provide for reference.

Until then, try the above one to see if you could spend your coins.

vanshtah

newbie

Activity: 12

Merit: 1

Quote from: nc50lc on February 03, 2020, 11:04:54 PM

Hmm no confirmations, maybe because of the current value of MAX_MONEY (master/src/amount.h) which is equal to the maximum "mineable" coins.
The premine output exceeded the MAX_MONEY which makes those coinbase transactions with 1Billion BTC output invalid.

Updated that too

Code:

static const CAmount MAX_MONEY = 10000000000 * COIN;

Block 4 details

Code:

{
"hash": "e8f6528f802bc3ada6d258983b6a573a2fe3534231d01c56defaac7040c0e926",
"confirmations": 1478,
"strippedsize": 216,
"size": 216,
"weight": 864,
"height": 4,
"version": 536870912,
"versionHex": "20000000",
"merkleroot": "c888967eedfb202a3f7f075c0a5602006dde4e153c40dea8742afccbb2ab4a70",
"tx": "See 'Transaction IDs'",
"time": 1580260378,
"mediantime": 1580259876,
"nonce": 55920,
"bits": "1e0ffff0",
"difficulty": 0.000244140625,
"chainwork": "0000000000000000000000000000000000000000000000000000000000500050",
"previousblockhash": "409c8ef479727dd5e183855ae7820042bfe7133b06e57f8810f4b6898a4a2711",
"nextblockhash": "c8d0f2f55e7aaf21e8637d420556bb932281151d6f39741d6c499310f8185261",
"coinbaseTx": {
"txid": "c888967eedfb202a3f7f075c0a5602006dde4e153c40dea8742afccbb2ab4a70",
"hash": "c888967eedfb202a3f7f075c0a5602006dde4e153c40dea8742afccbb2ab4a70",
"version": 2,
"size": 135,
"vsize": 135,
"locktime": 0,
"vin": [
{
"coinbase": "540107",
"sequence": 4294967295
}
],
"vout": [
{
"value": "1000000000.00000000",
"n": 0,
"scriptPubKey": {
"asm": "OP_DUP OP_HASH160 72563c4d79d5f410805691e233e5d4083f33a8cf OP_EQUALVERIFY OP_CHECKSIG",
"hex": "76a91472563c4d79d5f410805691e233e5d4083f33a8cf88ac",
"reqSigs": 1,
"type": "pubkeyhash",
"addresses": [
"ASCRz7q4RzWNjyZfD4Rrg214Y3CU57pa9v"
]
}
},
{
"value": 0,
"n": 1,
"scriptPubKey": {
"asm": "OP_RETURN aa21a9ede2f61c3f71d1defd3fa999dfa36953755c690689799962b48bebd836974e8cf9",
"hex": "6a24aa21a9ede2f61c3f71d1defd3fa999dfa36953755c690689799962b48bebd836974e8cf9",
"type": "nulldata"
}
}
],
"hex": "02000000010000000000000000000000000000000000000000000000000000000000000000ffffffff03540107ffffffff0200008a5d784563011976a91472563c4d79d5f410805691e233e5d4083f33a8cf88ac0000000000000000266a24aa21a9ede2f61c3f71d1defd3fa999dfa36953755c690689799962b48bebd836974e8cf900000000",
"blockhash": "e8f6528f802bc3ada6d258983b6a573a2fe3534231d01c56defaac7040c0e926",
"confirmations": 1478,
"time": 1580260378,
"blocktime": 1580260378
},
"totalFees": "999999950",
"miner": null
}

nc50lc

legendary

Activity: 2534

Merit: 6080

Self-proclaimed Genius

Hmm no confirmations, maybe because of the current value of MAX_MONEY (master/src/amount.h) which is equal to the maximum "mineable" coins, not the actual value for max bitcoins.
The premine output exceeded the MAX_MONEY which makes those coinbase transactions with 1Billion BTC output invalid.

vanshtah

newbie

Activity: 12

Merit: 1

Quote from: nc50lc on February 03, 2020, 09:54:08 PM

Quote from: vanshtah on February 03, 2020, 08:02:38 PM

-snip-
I start the mining I got the coins but I cannot spend it, do anyone has a solution to it

It needs to have at least 100 confirmations to be spendable.
In other words, you need to mine another 100 blocks.

I have mined 1000 blocks but still cannot spend it. I enabled the advanced wallet input control feature from the QT wallet and tried selective input to do a transaction but it is unconfirmed. There are 100 new blocks mined and still going on

nc50lc

legendary

Activity: 2534

Merit: 6080

Self-proclaimed Genius

Quote from: vanshtah on February 03, 2020, 08:02:38 PM

-snip-
I start the mining I got the coins but I cannot spend it, do anyone has a solution to it

It needs to have at least 100 confirmations to be spendable.
In other words, you need to mine another 100 blocks.

vanshtah

newbie

Activity: 12

Merit: 1

Hello all, I am learning about bitcoin development, a created a new genesis, I compiled it and i got the windows, Linux and mac wallet running pretty well. Now I also want to add premine to the source code and with some searches in the google I found a solution to it.

In validation.cpp #L1041

Code:

CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams)
{
int halvings = nHeight / consensusParams.nSubsidyHalvingInterval;
// Force block reward to zero when right shift is undefined.
if (halvings >= 64)
return 0;
CAmount nSubsidy = 50 * COIN;
if(nHeight == 4)
{
nSubsidy = 1000000000 * COIN;
return nSubsidy;
}
// Subsidy is cut in half every 210,000 blocks which will occur approximately every 4 years.
nSubsidy >>= halvings;
return nSubsidy;
}

I start the mining I got the coins but I cannot spend it, do anyone has a solution to it

Topic: How to add premine in the bitcoin source (Read 184 times)