Event

An event on the event chain can be compared to a transaction on a blockchain. An event has the following structure

Field

mediaType

MIME type of the data

data

Binary

previous

The hash of the previous event

timestamp

Unix timestamp in milliseconds. Time of when the event was signed

signKey

Public key with key type

signature

Signature of the binary representation of the event

hash

Hash of the binary representation of the event

JSON

{
  "timestamp": 1519883600,
  "previous": "BRFnaH3UFnABQ1gV1SvT9PLo5ZMFzH7NhqDSgyn1z8wD",
  "signKey": {
    "keyType": "ed25519",
    "publicKey": "2KduZAmAKuXEL463udjCQkVfwJkBQhpciUC4gNiayjSJ"
  },
  "signature": "2hqLhbmh2eX2WhAgbwHhBZqzdpFcjWBYYN5WBj8zcYVKzVbnVH7mESCC9c9acihxWFwfvufnFYxxgFMgJPbpbU4N",
  "hash": "9Y9DhjXHdrsUE93TZzSAYBWZS5TDWWNKKh2mihqRCGXh",
  "mediaType": "application/json",
  "data": "base64:eyJmb28iOiJiYXIiLCJjb2xvciI6ImdyZWVuIn0="
}
  • previous, signKey.publicKey, signature, and hash are base58 encoded

  • data is base64 encoded, and must be prefixed with base64.

Binary schema

The binary representation is used for signing and hashing the event.

Field
Type
Length

Previous

Hash (Bytes)

32

Key type

KeyType (Byte)

1

Public key

PublicKey (Array[Byte])

32 | 33

Timestamp

Long

8

Media type length (N)

Short

2

Media type

Array[Byte]

N

Data length (M)

Short

2

Data

Array[Byte]

M

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