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Speeds up LNInvoice parsing

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This commit is contained in:
Vitor Pamplona
2023-11-09 10:56:37 -05:00
parent 3fd0c61c0e
commit 499149b7d9
1 changed files with 14 additions and 8 deletions
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quartz/src/main/java/com/vitorpamplona/quartz/encoders/LnInvoiceUtil.kt
+14 -8
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@@ -6,7 +6,7 @@ import java.util.regex.Pattern
/** based on litecoinj */ /** based on litecoinj */
object LnInvoiceUtil { object LnInvoiceUtil {
private val invoicePattern = Pattern.compile("lnbc((?<amount>\\d+)(?<multiplier>[munp])?)?1[^1\\s]+", Pattern.CASE_INSENSITIVE) private val invoicePattern = Pattern.compile("lnbc((\\d+)([munp])?)?1[^1\\s]+", Pattern.CASE_INSENSITIVE)
/** The Bech32 character set for encoding. */ /** The Bech32 character set for encoding. */
private const val CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l" private const val CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
@@ -107,8 +107,8 @@ object LnInvoiceUtil {
val matcher = invoicePattern.matcher(invoice) val matcher = invoicePattern.matcher(invoice)
require(matcher.matches()) { "Failed to match HRP pattern" } require(matcher.matches()) { "Failed to match HRP pattern" }
val amountGroup = matcher.group("amount") val amountGroup = matcher.group(2)
val multiplierGroup = matcher.group("multiplier") val multiplierGroup = matcher.group(3)
if (amountGroup == null) { if (amountGroup == null) {
return BigDecimal.ZERO return BigDecimal.ZERO
} }
@@ -120,16 +120,22 @@ object LnInvoiceUtil {
return amount.multiply(multiplier(multiplierGroup)) return amount.multiply(multiplier(multiplierGroup))
} }
val OneHundredK = BigDecimal(100000000)
val OneMili = BigDecimal("0.001")
val OneMicro = BigDecimal("0.000001")
val OneNano = BigDecimal("0.000000001")
val OnePico = BigDecimal("0.000000000001")
fun getAmountInSats(invoice: String): BigDecimal { fun getAmountInSats(invoice: String): BigDecimal {
return getAmount(invoice).multiply(BigDecimal(100000000)) return getAmount(invoice).multiply(OneHundredK)
} }
private fun multiplier(multiplier: String): BigDecimal { private fun multiplier(multiplier: String): BigDecimal {
return when (multiplier.lowercase()) { return when (multiplier.lowercase()) {
"m" -> BigDecimal("0.001") "m" -> OneMili
"u" -> BigDecimal("0.000001") "u" -> OneMicro
"n" -> BigDecimal("0.000000001") "n" -> OneNano
"p" -> BigDecimal("0.000000000001") "p" -> OnePico
else -> throw IllegalArgumentException("Invalid multiplier: $multiplier") else -> throw IllegalArgumentException("Invalid multiplier: $multiplier")
} }
} }