encrywm.lib.predef.functions.hash.Keccak256Hash.scala Maven / Gradle / Ivy
package encrywm.lib.predef.functions.hash
import encrywm.backend.env.{ESBuiltInFunc, ESValue}
import encrywm.backend.executor.error.BuiltInFunctionExecError
import encrywm.lib.Types.ESByteVector
import encrywm.lib.predef.functions.BuiltInFunctionHolder
import scorex.crypto.hash.Keccak256
object Keccak256Hash extends BuiltInFunctionHolder {
val name = "keccak256hash"
override def asFunc: ESBuiltInFunc = ESBuiltInFunc(name, args, body)
val args = IndexedSeq("input" -> ESByteVector)
private val body = (args: Seq[(String, ESValue)]) => {
val validNumberOfArgs = args.size == 1
val validArgTypes = args.forall { case (_, v) => v.tpe.isInstanceOf[ESByteVector.type] }
if (validNumberOfArgs && validArgTypes) {
val fnArgs = args.map(_._2.value.asInstanceOf[Array[Byte]])
Right(Keccak256.hash(fnArgs.head))
} else {
Left(BuiltInFunctionExecError)
}
}
}