CWalletTx tx; tx.AddOutput(CBitcoinAddress("some_address"), 0.001 * COIN);
CKey key; ... std::vectorwitnesses; tx.Sign(0, key, &witnesses);
bool success = pwallet->CommitTransaction(tx, null);This code uses the CWallet object (represented by pwallet) to broadcast the CWalletTx object to the Bitcoin network. The null argument is used to indicate that the transaction should be sent as a standard transaction, rather than a replace-by-fee transaction. In conclusion, CWalletTx is a Bitcoin transaction class in the Bitcoin Core library that allows for easy manipulation of transaction data. It is used to create, sign, and broadcast Bitcoin transactions.