DecodedMessage class
This represents a fully decoded message. It attempts to give uniform shape to v1 and v2 messages.
Offline Storage
Beyond ordinary offline storage concerns (secure the database, etc), here are some tips for storing and indexing messages.
The id is a good message identifier for local storage purposes. -> Tip: consider id as your primary key in the local database
But often you won't have an id, instead you'll have a conversation and want to list the messages sequentially. To support this you'll want to key by the topic and sentAt together. -> Tip: consider topic+sentAt as an index in the local database.
Storing the decoded content is difficult because it can be any type.
Instead you'll want to store the encoded content because it can be
reliably serialized. Later, you can decode it using Client.decodeContent.
-> Tip: store the encoded content using encoded.writeToBuffer()
See the example app for a demonstration of the overall approach.
Constructors
- DecodedMessage(Message_Version version, DateTime sentAt, EthereumAddress sender, EncodedContent encoded, ContentTypeId contentType, Object content, {required String id, required String topic})
Properties
- content → Object
-
This contains the content decoded by all registered codecs.
e.g. for contentTypeText, the content will be a String
final
- contentType → ContentTypeId
-
This identifies the content's type.
final
- encoded → EncodedContent
-
This contains the raw encoded content.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- id → String
-
A unique identifier for this message.
Tip: this is a good identifier for local caching purposes.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- sender → EthereumAddress
-
Who sent the message.
final
- sentAt → DateTime
-
When the sender sent this message.
final
- topic → String
-
The topic identifier for the parent conversation.
final
- version → Message_Version
-
This identifies which type of message this contains.
For the most part, you are safe to ignore this.
This SDK takes pains to help you ignore the distinctions.
final
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited