Implement Abstracted `ConnectedWallet` operations to DWN API

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Description

All ConnectedWallet methods are abstracted over API Methods. DWN Service Worker is responsible for sending Server Side Events which are interpreted by HTMX.

New Methods

• getAuthInfo()
• estimateFee()
• broadcastTx()
• pollTx()
• broadcastTxSync()
• signArbitrary()
• signAndBroadcastTx()

Associated Files

These files will be modified by this task.

References

Related Issues

• #1114
• #1115

Tech Documents

Use these documents to help you complete the task.

• Connected Wallet Interface
• MPC Protocol Handler
• Payment API Best Practices

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Golang SSE Emitter

// NewSSE creates a new sse manager with the specified worker pool size.
func (h *HTMX) NewSSE(workerPoolSize int) error {
	if sseManager != nil {
		return errors.New("sse manager already exists")
	}

	sseManager = sse.NewManager(workerPoolSize)
	return nil
}

// SSEHandler handles the server-sent events. this is a shortcut and is not the preferred way to handle sse.
func (h *HTMX) SSEHandler(w http.ResponseWriter, r *http.Request, cl sse.Listener) {
	if sseManager == nil {
		sseManager = sse.NewManager(DefaultSSEWorkerPoolSize)
	}

	sseManager.Handle(w, r, cl)
}

// SSESend sends a message to all connected clients.
func (h *HTMX) SSESend(message sse.Envelope) {
	if sseManager == nil {
		sseManager = sse.NewManager(DefaultSSEWorkerPoolSize)
	}

	sseManager.Send(message)
}

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• Wallet Interface spawned by Controller on as needed basis
• proto.Actor spawned for signing operations using GetSignFunc()
• controller/accstd and controller/wallet for Smart Account implementation