sweepbatcher: use coopFailed in greedy selection

Treat coopFailed flag the same as nonCoopHint. The former is what we found in
previos signing attempts, the later is what the caller signalled to us.

sweepbatcher/greedy_batch_selection.go

@@ -125,7 +125,7 @@ func estimateSweepFeeIncrement(s *sweep) (feeDetails, feeDetails, error) {
 	// Create feeDetails for sweep.
 	sweepFeeDetails := feeDetails{
 		FeeRate:        s.minFeeRate,
-		NonCoopHint:    s.nonCoopHint,
+		NonCoopHint:    s.nonCoopHint || s.coopFailed,
 		IsExternalAddr: s.isExternalAddr,
 
 		// Calculate sweep weight as a difference.
@@ -152,7 +152,7 @@ func estimateBatchWeight(batch *batch) (feeDetails, error) {
 	// Find if the batch has at least one non-cooperative sweep.
 	hasNonCoop := false
 	for _, sweep := range batch.sweeps {
-		if sweep.nonCoopHint {
+		if sweep.nonCoopHint || sweep.coopFailed {
 			hasNonCoop = true
 		}
 	}

sweepbatcher/greedy_batch_selection_test.go

@@ -180,6 +180,27 @@ func TestEstimateSweepFeeIncrement(t *testing.T) {
 				NonCoopHint:   true,
 			},
 		},
+
+		{
+			name: "coop-failed",
+			sweep: &sweep{
+				minFeeRate:           lowFeeRate,
+				htlcSuccessEstimator: se3,
+				coopFailed:           true,
+			},
+			wantSweepFeeDetails: feeDetails{
+				FeeRate:       lowFeeRate,
+				CoopWeight:    coopInputWeight,
+				NonCoopWeight: nonCoopInputWeight,
+				NonCoopHint:   true,
+			},
+			wantNewBatchFeeDetails: feeDetails{
+				FeeRate:       lowFeeRate,
+				CoopWeight:    coopNewBatchWeight,
+				NonCoopWeight: nonCoopNewBatchWeight,
+				NonCoopHint:   true,
+			},
+		},
 	}
 
 	for _, tc := range cases {
@@ -330,6 +351,32 @@ func TestEstimateBatchWeight(t *testing.T) {
 			},
 		},
 
+		{
+			name: "coop-failed",
+			batch: &batch{
+				id: 1,
+				rbfCache: rbfCache{
+					FeeRate: lowFeeRate,
+				},
+				sweeps: map[lntypes.Hash]sweep{
+					swapHash1: {
+						htlcSuccessEstimator: se3,
+					},
+					swapHash2: {
+						htlcSuccessEstimator: se3,
+						coopFailed:           true,
+					},
+				},
+			},
+			wantBatchFeeDetails: feeDetails{
+				BatchId:       1,
+				FeeRate:       lowFeeRate,
+				CoopWeight:    coopTwoSweepBatchWeight,
+				NonCoopWeight: nonCoopTwoSweepBatchWeight,
+				NonCoopHint:   true,
+			},
+		},
+
 		{
 			name: "isExternalAddr",
 			batch: &batch{