/// <summary>
/// Connect a customer LN node to the merchant LN node
/// </summary>
/// <returns></returns>
private async Task PrepareLightningAsync(ILightningInvoiceClient client)
{
bool awaitingLocking = false;
while (true)
{
var merchantInfo = await WaitLNSynched(client, CustomerLightningD, MerchantLightningD);
var peers = await CustomerLightningD.ListPeersAsync();
var filteringToTargetedPeers = peers.Where(a => a.Id == merchantInfo.NodeId);
var channel = filteringToTargetedPeers
.SelectMany(p => p.Channels)
.Where(c => !SKIPPED_STATES.Contains(c.State ?? ""))
.FirstOrDefault();
switch (channel?.State)
{
case null:
var address = await CustomerLightningD.NewAddressAsync();
await ExplorerNode.SendToAddressAsync(address, Money.Coins(0.5m));
ExplorerNode.Generate(1);
await WaitLNSynched(client, CustomerLightningD, MerchantLightningD);
await Task.Delay(1000);
var merchantNodeInfo = new NodeInfo(merchantInfo.NodeId, merchantInfo.Address, merchantInfo.P2PPort);
await CustomerLightningD.ConnectAsync(merchantNodeInfo);
await CustomerLightningD.FundChannelAsync(merchantNodeInfo, Money.Satoshis(16777215));
break;
case "CHANNELD_AWAITING_LOCKIN":
ExplorerNode.Generate(awaitingLocking ? 1 : 10);
await WaitLNSynched(client, CustomerLightningD, MerchantLightningD);
awaitingLocking = true;
break;
case "CHANNELD_NORMAL":
return;
default:
throw new NotSupportedException(channel?.State ?? "");
}
}
}
/// <summary>
/// Connect a customer LN node to the merchant LN node
/// </summary>
/// <returns></returns>
public async Task PrepareLightningAsync()
{
while (true)
{
var skippedStates = new[] { "ONCHAIN", "CHANNELD_SHUTTING_DOWN", "CLOSINGD_SIGEXCHANGE", "CLOSINGD_COMPLETE", "FUNDING_SPEND_SEEN" };
var channel = (await CustomerLightningD.ListPeersAsync())
.SelectMany(p => p.Channels)
.Where(c => !skippedStates.Contains(c.State ?? ""))
.FirstOrDefault();
switch (channel?.State)
{
case null:
var merchantInfo = await WaitLNSynched();
var clightning = new NodeInfo(merchantInfo.Id, MerchantCharge.P2PHost, merchantInfo.Port);
await CustomerLightningD.ConnectAsync(clightning);
var address = await CustomerLightningD.NewAddressAsync();
await ExplorerNode.SendToAddressAsync(address, Money.Coins(0.2m));
ExplorerNode.Generate(1);
await WaitLNSynched();
await Task.Delay(1000);
await CustomerLightningD.FundChannelAsync(clightning, Money.Satoshis(16777215));
break;
case "CHANNELD_AWAITING_LOCKIN":
ExplorerNode.Generate(1);
await WaitLNSynched();
break;
case "CHANNELD_NORMAL":
return;
default:
throw new NotSupportedException(channel?.State ?? "");
}
}
}
public async Task <LnrpcChannel> EnsureLightningChannelAsync()
{
var merchantInfo = await WaitLNSynched();
var merchantNodeAddress = new LnrpcLightningAddress
{
Pubkey = merchantInfo.NodeId,
Host = "merchant_lnd:9735"
};
while (true)
{
// if channel is pending generate blocks until confirmed
var pendingResponse = await CustomerLnd.PendingChannelsAsync();
if (pendingResponse.Pending_open_channels?
.Any(a => a.Channel?.Remote_node_pub == merchantNodeAddress.Pubkey) == true)
{
ExplorerNode.Generate(1);
await WaitLNSynched();
continue;
}
// check if channel is established
var chanResponse = await CustomerLnd.ListChannelsAsync(null, null, null, null);
LnrpcChannel channelToMerchant = null;
if (chanResponse != null && chanResponse.Channels != null)
{
channelToMerchant = chanResponse.Channels
.Where(a => a.Remote_pubkey == merchantNodeAddress.Pubkey)
.FirstOrDefault();
}
if (channelToMerchant == null)
{
// create new channel
var isConnected = await CustomerLnd.ListPeersAsync();
if (isConnected.Peers == null ||
!isConnected.Peers.Any(a => a.Pub_key == merchantInfo.NodeId))
{
var connectResp = await CustomerLnd.ConnectPeerAsync(new LnrpcConnectPeerRequest
{
Addr = merchantNodeAddress
});
}
var addressResponse = await CustomerLnd.NewWitnessAddressAsync();
var address = BitcoinAddress.Create(addressResponse.Address, Network.RegTest);
await ExplorerNode.SendToAddressAsync(address, Money.Coins(0.2m));
ExplorerNode.Generate(1);
await WaitLNSynched();
var channelReq = new LnrpcOpenChannelRequest
{
Local_funding_amount = 16777215.ToString(CultureInfo.InvariantCulture),
Node_pubkey_string = merchantInfo.NodeId
};
var channelResp = await CustomerLnd.OpenChannelSyncAsync(channelReq);
}
else
{
// channel exists, return it
ExplorerNode.Generate(1);
await WaitLNSynched();
return(channelToMerchant);
}
}
}