Why may Bit-Wasp using PrivateKeyFactory::fromWif PHP produce Deprecated ERROR - php

Question

In my script this line of code using Bit-Wasp library for PHP gives me the following ERROR:
Deprecated: Non-static method BitWasp\Bitcoin\Key\Factory\PrivateKeyFactory::fromWif() should not be called statically
What can be the problem? Searched Examples from the Lib and many other examples with Bit-Wasp none of it worked. ((
use BitWasp\Bitcoin\Bitcoin;
.......
$addrCreator = new AddressCreator();
$transaction = TransactionFactory::build()
->input('some UTXO', 0)
->payToAddress(1000, $addrCreator->fromString('some addres'))
->payToAddress(1000, $addrCreator->fromString('some addres'))
->get();
$hex = $transaction->getHex();
$privateKey = 'WIF PRiVATE KEY';
$tx = TransactionFactory::fromHex($hex);
$utxos = [];
foreach ($tx->getInputs() as $idx => $input) {
$txid = $input->getOutPoint()->getTxId()->getHex();
$vout = $input->getOutPoint()->getVout();
$scriptPubKey = $input->getScript()->getBuffer()->getHex();
$utxo = new Utxo(new OutPoint(Buffer::hex($txid, 32), $vout), new TransactionOutput(0, ScriptFactory::fromHex($scriptPubKey)));
array_push($utxos, $utxo);
}
$priv = $factory->fromWif($privateKey);
$priv = PrivateKeyFactory::fromWif($privateKey);
$signer = new Signer($tx, Bitcoin::getEcAdapter());
foreach ($utxos as $i => $utxo) {
$signer->sign($i, $priv, $utxo->getOutput());
}
$signed = $signer->get();
echo $signed->getHex() . PHP_EOL;
PS all other functions from the Lib work fine.. just cannot figure out how sign raw tx using WIF private key ((
Any help is highly appreciated.
Thanks!

Answer 1

This is no tested code, just an explanation.
A static method is called on a class directly and not on an instance.
It looks like the library changed. So create an instance and call the method on it like:
$factory = new PrivateKeyFactory();
$key = $factory->fromWif($privateKey);