84 lines
3.0 KiB
Kotlin
84 lines
3.0 KiB
Kotlin
/*
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* Copyright 2016 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.apps.abit.pow
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import android.content.Context
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import ch.dissem.apps.abit.service.Singleton
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import ch.dissem.apps.abit.synchronization.SyncAdapter
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import ch.dissem.apps.abit.util.Preferences
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import ch.dissem.bitmessage.InternalContext
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import ch.dissem.bitmessage.extensions.CryptoCustomMessage
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import ch.dissem.bitmessage.extensions.pow.ProofOfWorkRequest
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import ch.dissem.bitmessage.extensions.pow.ProofOfWorkRequest.Request.CALCULATE
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import ch.dissem.bitmessage.ports.ProofOfWorkEngine
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import ch.dissem.bitmessage.utils.Singleton.cryptography
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import org.slf4j.LoggerFactory
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import java.util.concurrent.ExecutorService
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import java.util.concurrent.Executors
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/**
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* @author Christian Basler
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*/
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class ServerPowEngine(private val ctx: Context) : ProofOfWorkEngine, InternalContext.ContextHolder {
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private lateinit var context: InternalContext
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private val pool: ExecutorService
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init {
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pool = Executors.newCachedThreadPool { r ->
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val thread = Executors.defaultThreadFactory().newThread(r)
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thread.priority = Thread.MIN_PRIORITY
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thread
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}
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}
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override fun calculateNonce(initialHash: ByteArray, target: ByteArray, callback: ProofOfWorkEngine.Callback) =
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pool.execute {
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val identity = Singleton.getIdentity(ctx) ?: throw RuntimeException("No Identity for calculating POW")
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val request = ProofOfWorkRequest(identity, initialHash,
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CALCULATE, target)
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SyncAdapter.startPowSync(ctx)
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try {
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val cryptoMsg = CryptoCustomMessage(request)
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cryptoMsg.signAndEncrypt(
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identity,
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cryptography().createPublicKey(identity.publicDecryptionKey)
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)
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val node = Preferences.getTrustedNode(ctx)
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if (node == null) {
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LOG.error("trusted node is not defined")
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} else {
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context.networkHandler.send(
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node,
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Preferences.getTrustedNodePort(ctx),
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cryptoMsg)
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}
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} catch (e: Exception) {
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LOG.error(e.message, e)
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}
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}
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override fun setContext(context: InternalContext) {
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this.context = context
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}
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companion object {
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private val LOG = LoggerFactory.getLogger(ServerPowEngine::class.java)
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}
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}
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