IEEE 1588 PTP Implementation

Precision Time Protocol for Blockchain

ROKO Network implements IEEE 1588-2019 Precision Time Protocol (PTP) to achieve nanosecond-level synchronization across the global validator network.

PTP Architecture

Grandmaster Clock Hierarchy

GPS/GNSS Atomic Reference
             |
        Grandmaster
        (Stratum 0)
             |
        ┌────┴────┐
    Primary    Primary
    (Stratum 1)
        |         |
    Secondary  Secondary
    (Stratum 2)

Configuration

# /etc/ptp4l.conf
    [global]
    domainNumber            0
    use_syslog              1
    logging_level           6
    time_stamping           hardware
    tx_timestamp_timeout    10
    boundary_clock_jbod     1

    [eth0]
    network_transport       L2
    delay_mechanism         E2E
    announceReceiptTimeout  3
    syncReceiptTimeout      2

Implementation Details

Clock Synchronization

class PTPSync:
        def __init__(self):
            self.offset = 0
            self.drift = 0
            self.last_sync = NanoMoment.now()
        
        def sync_with_master(self):
            # Send Sync message
            t1 = self.send_sync()
            
            # Receive Sync
            t2 = self.receive_sync()
            
            # Send Delay_Req
            t3 = self.send_delay_req()
            
            # Receive Delay_Resp
            t4 = self.receive_delay_resp()
            
            # Calculate offset
            self.offset = ((t2 - t1) - (t4 - t3)) / 2
            
            # Calculate delay
            delay = ((t2 - t1) + (t4 - t3)) / 2
            
            # Adjust clock
            self.adjust_clock(self.offset)

Performance Metrics

Best Master Clock Algorithm

func selectBestMaster(clocks []Clock) Clock {
        best := clocks[0]
        
        for _, clock := range clocks[1:] {
            if clock.Priority1 < best.Priority1 {
                best = clock
            } else if clock.Priority1 == best.Priority1 {
                if clock.ClockClass < best.ClockClass {
                    best = clock
                } else if clock.ClockAccuracy < best.ClockAccuracy {
                    best = clock
                }
            }
        }
        
        return best
    }

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Precision Standard: IEEE 1588 PTP enables ROKO validators to maintain global synchronization within 100 nanoseconds.