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32 lines
756 B
32 lines
756 B
7 years ago
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package com.xsn.explorer.models
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import play.api.libs.json._
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class Blockhash private (val string: String) extends AnyVal
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object Blockhash {
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private val pattern = "^[a-f0-9]{64}$".r.pattern
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def from(string: String): Option[Blockhash] = {
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val lowercaseString = string.toLowerCase
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if (pattern.matcher(lowercaseString).matches()) {
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Some(new Blockhash(lowercaseString))
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} else {
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None
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}
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}
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implicit val reads: Reads[Blockhash] = Reads { json =>
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json.validate[String].flatMap { string =>
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from(string)
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.map(JsSuccess.apply(_))
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.getOrElse {
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JsError.apply("Invalid blockhash")
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}
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}
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}
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implicit val writes: Writes[Blockhash] = Writes { obj => JsString(obj.string) }
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}
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