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mempool: export isDust for use in other projects

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This changes isDust to IsDust so other golang projects (btcwallet
or lnd) can use the precise dust calculation used by btcd.
This commit is contained in:
eugene 2021-08-02 11:14:52 -04:00 committed by John C. Vernaleo
parent b3e6bd6161
commit f5a1fb9965
2 changed files with 5 additions and 5 deletions
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6
mempool/policy.go
View File

@ -172,12 +172,12 @@ func checkPkScriptStandard(pkScript []byte, scriptClass txscript.ScriptClass) er
return nil
}
// isDust returns whether or not the passed transaction output amount is
// IsDust returns whether or not the passed transaction output amount is
// considered dust or not based on the passed minimum transaction relay fee.
// Dust is defined in terms of the minimum transaction relay fee. In
// particular, if the cost to the network to spend coins is more than 1/3 of the
// minimum transaction relay fee, it is considered dust.
func isDust(txOut *wire.TxOut, minRelayTxFee btcutil.Amount) bool {
func IsDust(txOut *wire.TxOut, minRelayTxFee btcutil.Amount) bool {
// Unspendable outputs are considered dust.
if txscript.IsUnspendable(txOut.PkScript) {
return true
@ -351,7 +351,7 @@ func checkTransactionStandard(tx *btcutil.Tx, height int32,
// "dust".
if scriptClass == txscript.NullDataTy {
numNullDataOutputs++
} else if isDust(txOut, minRelayTxFee) {
} else if IsDust(txOut, minRelayTxFee) {
str := fmt.Sprintf("transaction output %d: payment "+
"of %d is dust", i, txOut.Value)
return txRuleError(wire.RejectDust, str)

4
mempool/policy_test.go
View File

@ -204,7 +204,7 @@ func TestCheckPkScriptStandard(t *testing.T) {
}
}
// TestDust tests the isDust API.
// TestDust tests the IsDust API.
func TestDust(t *testing.T) {
pkScript := []byte{0x76, 0xa9, 0x21, 0x03, 0x2f, 0x7e, 0x43,
0x0a, 0xa4, 0xc9, 0xd1, 0x59, 0x43, 0x7e, 0x84, 0xb9,
@ -268,7 +268,7 @@ func TestDust(t *testing.T) {
},
}
for _, test := range tests {
res := isDust(&test.txOut, test.relayFee)
res := IsDust(&test.txOut, test.relayFee)
if res != test.isDust {
t.Fatalf("Dust test '%s' failed: want %v got %v",
test.name, test.isDust, res)