63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
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package sweep
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import (
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"testing"
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"github.com/btcsuite/btcutil"
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"github.com/lightningnetwork/lnd/input"
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)
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// TestTxInputSet tests adding various sized inputs to the set.
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func TestTxInputSet(t *testing.T) {
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const (
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feeRate = 1000
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relayFee = 300
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maxInputs = 10
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)
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set := newTxInputSet(feeRate, relayFee, maxInputs)
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if set.dustLimit != 537 {
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t.Fatalf("incorrect dust limit")
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}
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// Create a 300 sat input. The fee to sweep this input to a P2WKH output
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// is 439 sats. That means that this input yields -139 sats and we
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// expect it not to be added.
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if set.add(createP2WKHInput(300)) {
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t.Fatal("expected add of negatively yielding input to fail")
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}
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// A 700 sat input should be accepted into the set, because it yields
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// positively.
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if !set.add(createP2WKHInput(700)) {
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t.Fatal("expected add of positively yielding input to succeed")
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}
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// The tx output should now be 700-439 = 261 sats. The dust limit isn't
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// reached yet.
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if set.outputValue != 261 {
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t.Fatal("unexpected output value")
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}
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if set.dustLimitReached() {
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t.Fatal("expected dust limit not yet to be reached")
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}
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// Add a 1000 sat input. This increases the tx fee to 712 sats. The tx
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// output should now be 1000+700 - 712 = 988 sats.
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if !set.add(createP2WKHInput(1000)) {
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t.Fatal("expected add of positively yielding input to succeed")
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}
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if set.outputValue != 988 {
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t.Fatal("unexpected output value")
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}
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if !set.dustLimitReached() {
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t.Fatal("expected dust limit to be reached")
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}
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}
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// createP2WKHInput returns a P2WKH test input with the specified amount.
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func createP2WKHInput(amt btcutil.Amount) input.Input {
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input := createTestInput(int64(amt), input.WitnessKeyHash)
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return &input
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}
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