staticaddr: loop-in manager and fsm

Author: hieblmi

interface.go

@@ -234,6 +234,42 @@ type LoopInRequest struct {
 	RouteHints [][]zpay32.HopHint
 }
 
+// StaticAddressLoopInRequest contains the required parameters for the swap.
+type StaticAddressLoopInRequest struct {
+	// DepositOutpoints contain the outpoints 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 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
+}
+
 // 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

loopin.go

@@ -248,7 +248,7 @@ func newLoopInSwap(globalCtx context.Context, cfg *swapConfig,
 
 	// Validate if the response parameters are outside our allowed range
 	// preventing us from continuing with a swap.
-	err = validateLoopInContract(currentHeight, swapResp)
+	err = ValidateLoopInContract(currentHeight, swapResp.expiry)
 	if err != nil {
 		return nil, err
 	}
@@ -429,11 +429,11 @@ func resumeLoopInSwap(_ context.Context, cfg *swapConfig,
 	return swap, nil
 }
 
-// validateLoopInContract validates the contract parameters against our request.
-func validateLoopInContract(height int32, response *newLoopInResponse) error {
+// ValidateLoopInContract validates the contract parameters against our request.
+func ValidateLoopInContract(height int32, htlcExpiry int32) error {
 	// Verify that we are not forced to publish a htlc that locks up our
 	// funds for too long in case the server doesn't follow through.
-	if response.expiry-height > MaxLoopInAcceptDelta {
+	if htlcExpiry-height > MaxLoopInAcceptDelta {
 		return ErrExpiryTooFar
 	}