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Accept to pay amountless trampoline invoices (phoenix special)

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dpad85 2020-01-17 13:21:12 +01:00
parent a6d23d4f8a
commit e543dff0a2
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1 changed files with 21 additions and 21 deletions
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42
eclair-core/src/main/scala/fr/acinq/eclair/payment/send/PaymentInitiator.scala
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@ -68,28 +68,28 @@ class PaymentInitiator(nodeParams: NodeParams, router: ActorRef, relayer: ActorR
val paymentId = UUID.randomUUID()
sender ! paymentId
if (!r.paymentRequest.features.allowTrampoline && r.paymentRequest.amount.isEmpty) {
sender ! PaymentFailed(paymentId, r.paymentRequest.paymentHash, LocalFailure(new IllegalArgumentException("cannot pay a 0-value invoice via trampoline-to-legacy (trampoline may steal funds)")) :: Nil)
} else {
val paymentCfg = SendPaymentConfig(paymentId, paymentId, None, r.paymentRequest.paymentHash, r.trampolineNodeId, Upstream.Local(paymentId), Some(r.paymentRequest), storeInDb = true, publishEvent = true, Some(r))
val finalPayload = if (r.paymentRequest.features.allowMultiPart) {
Onion.createMultiPartPayload(r.finalAmount, r.finalAmount, r.finalExpiry(nodeParams.currentBlockHeight), r.paymentRequest.paymentSecret.get)
} else {
Onion.createSinglePartPayload(r.finalAmount, r.finalExpiry(nodeParams.currentBlockHeight), r.paymentRequest.paymentSecret)
}
val trampolineRoute = Seq(
NodeHop(nodeParams.nodeId, r.trampolineNodeId, nodeParams.expiryDeltaBlocks, 0 msat),
NodeHop(r.trampolineNodeId, r.paymentRequest.nodeId, r.trampolineExpiryDelta, r.trampolineFees) // for now we only use a single trampoline hop
)
// We assume that the trampoline node supports multi-part payments (it should).
val (trampolineAmount, trampolineExpiry, trampolineOnion) = if (r.paymentRequest.features.allowTrampoline) {
OutgoingPacket.buildPacket(Sphinx.TrampolinePacket)(r.paymentRequest.paymentHash, trampolineRoute, finalPayload)
} else {
OutgoingPacket.buildTrampolineToLegacyPacket(r.paymentRequest, trampolineRoute, finalPayload)
}
// We generate a random secret for this payment to avoid leaking the invoice secret to the first trampoline node.
val trampolineSecret = randomBytes32
spawnMultiPartPaymentFsm(paymentCfg) forward SendMultiPartPayment(r.paymentRequest.paymentHash, trampolineSecret, r.trampolineNodeId, trampolineAmount, trampolineExpiry, 1, r.paymentRequest.routingInfo, r.routeParams, Seq(OnionTlv.TrampolineOnion(trampolineOnion.packet)))
// Phoenix special case: we allow paying an amountless payment request over trampoline. It's ok because user has been warned in Phoenix.
log.info("trying to pay an amountless invoice over trampoline")
}
val paymentCfg = SendPaymentConfig(paymentId, paymentId, None, r.paymentRequest.paymentHash, r.trampolineNodeId, Upstream.Local(paymentId), Some(r.paymentRequest), storeInDb = true, publishEvent = true, Some(r))
val finalPayload = if (r.paymentRequest.features.allowMultiPart) {
Onion.createMultiPartPayload(r.finalAmount, r.finalAmount, r.finalExpiry(nodeParams.currentBlockHeight), r.paymentRequest.paymentSecret.get)
} else {
Onion.createSinglePartPayload(r.finalAmount, r.finalExpiry(nodeParams.currentBlockHeight), r.paymentRequest.paymentSecret)
}
val trampolineRoute = Seq(
NodeHop(nodeParams.nodeId, r.trampolineNodeId, nodeParams.expiryDeltaBlocks, 0 msat),
NodeHop(r.trampolineNodeId, r.paymentRequest.nodeId, r.trampolineExpiryDelta, r.trampolineFees) // for now we only use a single trampoline hop
)
// We assume that the trampoline node supports multi-part payments (it should).
val (trampolineAmount, trampolineExpiry, trampolineOnion) = if (r.paymentRequest.features.allowTrampoline) {
OutgoingPacket.buildPacket(Sphinx.TrampolinePacket)(r.paymentRequest.paymentHash, trampolineRoute, finalPayload)
} else {
OutgoingPacket.buildTrampolineToLegacyPacket(r.paymentRequest, trampolineRoute, finalPayload)
}
// We generate a random secret for this payment to avoid leaking the invoice secret to the first trampoline node.
val trampolineSecret = randomBytes32
spawnMultiPartPaymentFsm(paymentCfg) forward SendMultiPartPayment(r.paymentRequest.paymentHash, trampolineSecret, r.trampolineNodeId, trampolineAmount, trampolineExpiry, 1, r.paymentRequest.routingInfo, r.routeParams, Seq(OnionTlv.TrampolineOnion(trampolineOnion.packet)))
}
def spawnPaymentFsm(paymentCfg: SendPaymentConfig): ActorRef = context.actorOf(PaymentLifecycle.props(nodeParams, paymentCfg, router, register))