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Fix concurrent spends with Electrum (#233)

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By keeping temporary spending items in history
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Pierre-Marie Padiou 2017-11-29 17:40:07 +01:00 • committed by GitHub
parent 2d5d68bf3f
commit 2ef479d38c
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1 changed files with 14 additions and 4 deletions
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18
eclair-core/src/main/scala/fr/acinq/eclair/blockchain/electrum/ElectrumWallet.scala
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@ -128,9 +128,16 @@ class ElectrumWallet(mnemonics: Seq[String], client: ActorRef, params: ElectrumW
goto(stateName) using data1 // goto instead of stay because we want to fire transitions
case Event(ElectrumClient.GetScriptHashHistoryResponse(scriptHash, history), data) =>
log.debug(s"scriptHash=$scriptHash has history=$history")
val (heights1, pendingTransactionRequests1) = history.foldLeft((data.heights, data.pendingTransactionRequests)) {
case Event(ElectrumClient.GetScriptHashHistoryResponse(scriptHash, items), data) =>
log.debug(s"scriptHash=$scriptHash has history=$items")
val shadow_items = data.history.get(scriptHash) match {
case Some(existing_items) => existing_items.filterNot(item => items.exists(_.tx_hash == item.tx_hash))
case None => Nil
}
shadow_items.foreach(item => log.warning(s"keeping shadow item for txid=${item.tx_hash}"))
val items0 = items ++ shadow_items
val (heights1, pendingTransactionRequests1) = items0.foldLeft((data.heights, data.pendingTransactionRequests)) {
case ((heights, hashes), item) if !data.transactions.contains(item.tx_hash) && !data.pendingTransactionRequests.contains(item.tx_hash) =>
// we retrieve the tx if we don't have it and haven't yet requested it
client ! GetTransaction(item.tx_hash)
@ -157,7 +164,7 @@ class ElectrumWallet(mnemonics: Seq[String], client: ActorRef, params: ElectrumW
// no reorg, nothing to do
}
}
val data1 = data.copy(heights = heights1, history = data.history + (scriptHash -> history), pendingHistoryRequests = data.pendingHistoryRequests - scriptHash, pendingTransactionRequests = pendingTransactionRequests1)
val data1 = data.copy(heights = heights1, history = data.history + (scriptHash -> items0), pendingHistoryRequests = data.pendingHistoryRequests - scriptHash, pendingTransactionRequests = pendingTransactionRequests1)
goto(stateName) using data1 // goto instead of stay because we want to fire transitions
case Event(GetTransactionResponse(tx), data) =>
@ -410,6 +417,9 @@ object ElectrumWallet {
* @param heights transactions heights
* @param history script hash -> history
* @param locks transactions which lock some of our utxos.
* @param pendingHistoryRequests requests pending a response from the electrum server
* @param pendingTransactionRequests requests pending a response from the electrum server
* @param pendingTransactions transactions received but not yet connected to their parents
*/
case class Data(tip: ElectrumClient.Header,
accountKeys: Vector[ExtendedPrivateKey],