liquidity: add initiator to swap requests

liquidity/autoloop_test.go

@@ -146,6 +146,7 @@ func TestAutoLoopEnabled(t *testing.T) {
 			SweepConfTarget: params.SweepConfTarget,
 			OutgoingChanSet: loopdb.ChannelSet{chanID1.ToUint64()},
 			Label:           labels.AutoOutLabel(),
+			Initiator:       autoloopSwapInitiator,
 		}
 
 		chan2Swap = &loop.OutRequest{
@@ -161,6 +162,7 @@ func TestAutoLoopEnabled(t *testing.T) {
 			SweepConfTarget: params.SweepConfTarget,
 			OutgoingChanSet: loopdb.ChannelSet{chanID2.ToUint64()},
 			Label:           labels.AutoOutLabel(),
+			Initiator:       autoloopSwapInitiator,
 		}
 
 		loopOuts = []loopOutRequestResp{

liquidity/liquidity.go

@@ -99,6 +99,10 @@ const (
 	// DefaultAutoOutTicker is the default amount of time between automated
 	// loop out checks.
 	DefaultAutoOutTicker = time.Minute * 10
+
+	// autoloopSwapInitiator is the value we send in the initiator field of
+	// a swap request when issuing an automatic swap.
+	autoloopSwapInitiator = "autoloop"
 )
 
 var (
@@ -704,6 +708,7 @@ func (m *Manager) makeLoopOutRequest(ctx context.Context,
 		MaxSwapFee:          quote.SwapFee,
 		MaxPrepayAmount:     quote.PrepayAmount,
 		SweepConfTarget:     m.params.SweepConfTarget,
+		Initiator:           autoloopSwapInitiator,
 	}
 
 	if autoOut {

liquidity/liquidity_test.go

@@ -68,6 +68,7 @@ var (
 		MaxSwapFee:          testQuote.SwapFee,
 		MaxPrepayAmount:     testQuote.PrepayAmount,
 		SweepConfTarget:     loop.DefaultSweepConfTarget,
+		Initiator:           autoloopSwapInitiator,
 	}
 
 	// chan2Rec is the suggested swap for channel 2 when we use chanRule.
@@ -80,6 +81,7 @@ var (
 		MaxPrepayAmount:     testQuote.PrepayAmount,
 		MaxSwapFee:          testQuote.SwapFee,
 		SweepConfTarget:     loop.DefaultSweepConfTarget,
+		Initiator:           autoloopSwapInitiator,
 	}
 
 	// chan1Out is a contract that uses channel 1, used to represent on