public function signAndVerifySignatureBasicallyWorks()
{
$plaintext = 'trustworthy data!';
$signature = $this->rsaWalletService->sign($plaintext, $this->keyPairUuid);
$this->assertTrue($this->rsaWalletService->verifySignature($plaintext, $signature, $this->keyPairUuid));
$this->assertFalse($this->rsaWalletService->verifySignature('modified data!', $signature, $this->keyPairUuid));
}