Bitcoin/address validation: Difference between revisions
Content added Content deleted
(→{{header|Kotlin}}: Updated example see https://github.com/dkandalov/rosettacode-kotlin for details) |
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=={{header|Kotlin}}== |
=={{header|Kotlin}}== |
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{{trans|Java}} |
{{trans|Java}} |
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<lang scala> |
<lang scala>import java.security.MessageDigest |
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import java.security.MessageDigest |
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object Bitcoin { |
object Bitcoin { |
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private fun ByteArray.contentEquals(other: ByteArray): Boolean { |
private fun ByteArray.contentEquals(other: ByteArray): Boolean { |
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if (this.size != other.size) return false |
if (this.size != other.size) return false |
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return (0 until this.size).none { this[it] != other[it] } |
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return true |
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} |
} |
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var p = ALPHABET.indexOf(c) |
var p = ALPHABET.indexOf(c) |
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if (p == -1) return null |
if (p == -1) return null |
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for (j in 24 downTo 1) { |
for (j in 24 downTo 1) { |
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p += 58 * (output[j].toInt() and 0xff) |
p += 58 * (output[j].toInt() and 0xff) |
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output[j] = (p % 256).toByte() |
output[j] = (p % 256).toByte() |
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return output |
return output |
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} |
} |
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private fun sha256(data: ByteArray, start: Int, len: Int, recursion: Int): ByteArray { |
private fun sha256(data: ByteArray, start: Int, len: Int, recursion: Int): ByteArray { |
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if (recursion == 0) return data |
if (recursion == 0) return data |
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md.update(data.sliceArray(start until start + len)) |
md.update(data.sliceArray(start until start + len)) |
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return sha256(md.digest(), 0, 32, recursion - 1) |
return sha256(md.digest(), 0, 32, recursion - 1) |
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} |
} |
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fun validateAddress(address: String): Boolean { |
fun validateAddress(address: String): Boolean { |
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if (address.length !in 26..35) return false |
if (address.length !in 26..35) return false |
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val decoded = decodeBase58(address) |
val decoded = decodeBase58(address) |
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if (decoded == null) return false |
if (decoded == null) return false |
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