elsif ( $class eq 'miner' ) {
            my ( $t, $d ) = split /\s+/, $payload, 2;
            if ($d) {
                lock %{ $self{'miner'}{$t} };
                trc 'dbg', 'miner data', $t, length $d;

                $self{'miner'}{$t}{'expi'} = time() + $cnf{'period'};
                $self{'miner'}{$t}{'data'} = $d;
            }
        }