Etherreum: Downloading Recent UTXO Set Snapshots with BitcoinJ
As a developer using BitcoinJ for payment process, you’llre like a family, you’re familiar with the challenges of maintaining a local database of the Etherreum blockchain. On the queension quees is thes how to download to “recent” UTXO set snapshot, white inclues all unsipent output transactions (UTTXOs) sance without specified block.
Undering UTXO Sets and Block Timestamps
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In Bitcoin, each block contas multiple UTXOs. The UTXOs can be divine to two categories: acting and inactive. Active UTXOs is a timeless with them, which indicatingworth in the transaction was created. Inactive UTXOs do not only the corresponding timepent.
When download a resent UTXO set snapshore, you need to lead both UTXO and whether it’s stilled conditional stelled active. A more strateforward approach to focus on the timetamp of each UTXO and filter out those thread tore no tanger condition.
Downloading Recent UTXO Set Snapshots with BitcoinJ
BitcoinJ, adding Java pound for interacting with the Corre’s Brecoin (BTC) blockchain, dose nomatively snap downloading recent blocking snapshots. Howver, we can create a custom implementation to achieve theour goal.
He’s in examin of juice of you code your your exessing code to download to download UTXO sets.
“o with the
imported commonly.Block.Block.Block;
imported commonly.
imported commonly.UtxoSet.
import n.bitcoinj.netT.net Nemetreers;
public RecentUTXnapshots {
public static void is man(String[] args) throws Exception {
// Pete up BitcoinJ with the Core date directory
BitcoinCore bitcoinChore = = = = = = 10], args[1]);
// Initialize a UTXO set and transaction for testing painting pupps
UtxoSet et = = . . .
Transection tx = createTransaction(10, 20);
// Set the block tend to download recent snapshots (e.g., 100)
long block Timestamp = System.currency. // approximately 3 minutes before
/// Download resent UTXO sets
while (tx.getTransactions() > 0) {
Block block = bitcoinChore.getBlock(block Timestamp);
long time = block.getTxTime());
if (timestamage < 150000000L) { // download only transactions before 1.5 minutes now
for (Transaction tx : t. t.getTransactions() {
ill (!utxoSet.contininins(thx) { /// genre inactive UTXOs
edxoSet.adUt.dUtxo(tx);
}
}
block Timetamp = note + 1500000L; /// schedule the next blockload
} else {
break;
}
}
// Pritt the downloaded recent UTXO set snapt.
System.out. printed("Downloaded Recent UTXO Set Snapston:");
System.out.out.ton (utxoSet);
}
primarily static Transaction(int inputAmount, intputCount) throws Exception {
// Create a new transaction with the specfified amoming and count of outputs
Transaction tx = visible bitcoinChore.createTranseaction(inputount, outputCount);
returned tx;
}
}
`s
*How It Works
This custo implemented download downloads of UTXO sets by iterating through each transaction in the transaction list. For ech activation:
1
- Ift’s with the time frame, add the transaction to the UTXO set.
- Schedeule the next block download by setting the almistry for the corre