Module sender

Message sender implementations for TAP Node.

This module provides functionality for sending TAP messages to recipients using various transport mechanisms.

Overview

The message sender system in TAP Node implements different strategies for delivering DIDComm messages to their recipients. The primary implementations are:

• NodeMessageSender: A flexible sender that uses a callback function for delivery
• HttpMessageSender: Sends messages over HTTP with robust error handling and retries

Cross-platform Support

The HttpMessageSender implementation supports multiple platforms:

• Native environments (using reqwest)
• WASM environments (using web-sys)
• Fallback implementations for environments without these libraries

Usage with TapNode

// Create a TapNode
let node = TapNode::new(NodeConfig::default());

// Create a sample message
let message = Message {
    id: "test-123".to_string(),
    typ: "https://tap.rsvp/schema/1.0#transfer".to_string(),
    type_: "https://tap.rsvp/schema/1.0#transfer".to_string(),
    body: json!({"amount": "100.00"}),
    from: Some("did:example:sender".to_string()),
    to: Some(vec!["did:example:recipient".to_string()]),
    created_time: Some(chrono::Utc::now().timestamp() as u64),
    expires_time: None,
    thid: None,
    pthid: None,
    attachments: None,
    from_prior: None,
    extra_headers: Default::default(),
};

// Pack a message using the node's send_message method
let packed_message = node.send_message(
    "did:example:sender",
    "did:example:recipient",
    message
).await?;

// Create an HTTP sender for external dispatch
let sender = HttpMessageSender::new("https://recipient-endpoint.example.com".to_string());

// Send the packed message to the recipient node
sender.send(
    packed_message,
    vec!["did:example:recipient".to_string()]
).await?;

Structs

HttpMessageSender

HTTP message sender implementation for sending messages over HTTP

NodeMessageSender

Node message sender implementation

WebSocketMessageSender

WebSocket message sender implementation for sending messages over WebSockets

Traits

MessageSender

Message sender trait for sending packed messages to recipients