interface: add StaticAddressLoopInRequest interface

interface.go

@@ -234,6 +234,48 @@ type LoopInRequest struct {
 	RouteHints [][]zpay32.HopHint
 }
 
+// StaticAddressLoopInRequest contains the required parameters for the swap.
+type StaticAddressLoopInRequest struct {
+	// DepositOutpoints contain the outpoints in format txid:idx of the
+	// static address deposits that are being looped in. The sum of output
+	// values constitute the swap amount.
+	DepositOutpoints []string
+
+	// MaxSwapFee is the maximum we are willing to pay the server for the
+	// swap. This value is not disclosed in the swap initiation call, but if
+	// the server asks for a higher fee, we abort the swap. Typically, this
+	// value is taken from the response of the LoopInQuote call. It
+	// includes the pre-pay amount.
+	MaxSwapFee btcutil.Amount
+
+	// LastHop optionally specifies the last hop to use for the loop in
+	// payment.
+	LastHop *route.Vertex
+
+	// Label contains an optional text label for the swap.
+	Label string
+
+	// Initiator is an optional string that identifies what software
+	// initiated the swap (loop CLI, autolooper, LiT UI and so on) and is
+	// appended to the user agent string.
+	Initiator string
+
+	// Private indicates whether the destination node should be considered
+	// private. In which case, loop will generate hophints to assist with
+	// probing and payment.
+	Private bool
+
+	// RouteHints are optional route hints to reach the destination through
+	// private channels.
+	RouteHints [][]zpay32.HopHint
+
+	// PaymentTimeoutSeconds allows the user to specify an upper limit for
+	// the amount of time the server is allowed to fulfill the off-chain
+	// swap payment. If the timeout is reached the swap will be aborted and
+	// the client can retry the swap if desired with different parameters.
+	PaymentTimeoutSeconds uint32
+}
+
 // LoopInTerms are the server terms on which it executes loop in swaps.
 type LoopInTerms struct {
 	// MinSwapAmount is the minimum amount that the server requires for a