# Block message binary format
Block message is a reply on GetBlock message.
| # | Field name | Type | Length in Bytes |
|---|---|---|---|
| 1 | Packet length (BigEndian) | Int | 4 |
| 2 | Magic Bytes | Bytes | 4 |
| 3 | Content ID (0x17) | Byte | 1 |
| 4 | Payload length | Int | 4 |
| 5 | Payload checksum | Bytes | 4 |
| 6 | Block bytes (N) | Bytes | N |