sweep: create add constraints

This refactor prepares for the addition of specific constraints for
force sweep inputs.

sweep/tx_input_set_test.go

@@ -24,13 +24,13 @@ func TestTxInputSet(t *testing.T) {
 	// Create a 300 sat input. The fee to sweep this input to a P2WKH output
 	// is 439 sats. That means that this input yields -139 sats and we
 	// expect it not to be added.
-	if set.add(createP2WKHInput(300), false) {
+	if set.add(createP2WKHInput(300), constraintsRegular) {
 		t.Fatal("expected add of negatively yielding input to fail")
 	}
 
 	// A 700 sat input should be accepted into the set, because it yields
 	// positively.
-	if !set.add(createP2WKHInput(700), false) {
+	if !set.add(createP2WKHInput(700), constraintsRegular) {
 		t.Fatal("expected add of positively yielding input to succeed")
 	}
 
@@ -45,7 +45,7 @@ func TestTxInputSet(t *testing.T) {
 
 	// Add a 1000 sat input. This increases the tx fee to 712 sats. The tx
 	// output should now be 1000+700 - 712 = 988 sats.
-	if !set.add(createP2WKHInput(1000), false) {
+	if !set.add(createP2WKHInput(1000), constraintsRegular) {
 		t.Fatal("expected add of positively yielding input to succeed")
 	}
 	if set.outputValue != 988 {
@@ -70,7 +70,7 @@ func TestTxInputSetFromWallet(t *testing.T) {
 
 	// Add a 700 sat input to the set. It yields positively, but doesn't
 	// reach the output dust limit.
-	if !set.add(createP2WKHInput(700), false) {
+	if !set.add(createP2WKHInput(700), constraintsRegular) {
 		t.Fatal("expected add of positively yielding input to succeed")
 	}
 	if set.dustLimitReached() {