$amount  = (float)$this->ipnVariables->get('mc_gross');
							$minimum = (float)Flux::config('MinDonationAmount');

							if ($amount >= $minimum) {
								$trustTable = Flux::config('FluxTables.DonationTrustTable');
								$holdHours  = +(int)Flux::config('HoldUntrustedAccount');

								if ($holdHours) {
									$sql = "SELECT account_id, email FROM {$servGroup->loginDatabase}.$trustTable WHERE account_id = ? AND email = ? LIMIT 1";
									$sth = $servGroup->connection->getStatement($sql);
									$res = $sth->execute(array($accountID, $payerEmail));

									if ($res && $sth->fetch()->account_id) {
										$this->logPayPal('Account ID and e-mail are trusted.');
										$trusted = true;
									}
									else {
										$trusted = false;
									}
								}

								$rate    = Flux::config('CreditExchangeRate');
								$credits = floor($amount / $rate);

								if ($trusted) {
									$sql = "SELECT * FROM {$servGroup->loginDatabase}.{$this->creditsTable} WHERE account_id = ?";
									$sth = $servGroup->connection->getStatement($sql);
									$sth->execute(array($accountID));
									$acc = $sth->fetch();

									$this->logPayPal('Updating account credit balance from %s to %s', (int)$acc->balance, $acc->balance + $credits);
									$res = $servGroup->loginServer->depositCredits($accountID, $credits, $amount);

									if ($res) {
										$this->logPayPal('Deposited credits.');
									}
									else {
										$this->logPayPal('Failed to deposit credits.');
									}
								}
								else {
									$this->logPayPal('Account/e-mail is not trusted, holding donation credits for %d hours.', $holdHours);
								}
							}
							else {
								$this->logPayPal('User has donated less than the configured minimum, not exchanging credits.');
							}