Support onchain for prism

Plugins/BTCPayServer.Plugins.Prism/OnChainPrismClaimCreate.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Threading.Tasks;
+using BTCPayServer.Abstractions.Contracts;
+using BTCPayServer.Data;
+using BTCPayServer.HostedServices;
+using BTCPayServer.Payments;
+using NBitcoin;
+using NBXplorer.DerivationStrategy;
+
+namespace BTCPayServer.Plugins.Prism;
+
+public class OnChainPrismClaimCreate : IPluginHookFilter
+{
+    private readonly BTCPayNetworkProvider _networkProvider;
+    private readonly ExplorerClientProvider _explorerClientProvider;
+    public string Hook => "prism-claim-create";
+
+    public OnChainPrismClaimCreate(BTCPayNetworkProvider networkProvider, ExplorerClientProvider explorerClientProvider)
+    {
+        _networkProvider = networkProvider;
+        _explorerClientProvider = explorerClientProvider;
+    }
+
+    public async Task<object> Execute(object args)
+    {
+        var network = _networkProvider.GetNetwork<BTCPayNetwork>("BTC");
+        if (args is not ClaimRequest claimRequest || network is null)
+        {
+            return args;
+        }
+
+        if (claimRequest.Destination?.Id is not { } destStr) return args;
+        try
+        {
+            claimRequest.Destination =
+                new AddressClaimDestination(BitcoinAddress.Create(destStr, network.NBitcoinNetwork));
+            claimRequest.PaymentMethodId = new PaymentMethodId("BTC", BitcoinPaymentType.Instance);
+            return args;
+        }
+        catch (Exception)
+        {
+            try
+            {
+                var ds = new DerivationSchemeParser(network).Parse(destStr);
+                var ec = _explorerClientProvider.GetExplorerClient(network);
+                var add = await ec.GetUnusedAsync(ds, DerivationFeature.Deposit, 0, true);
+
+                claimRequest.Destination =
+                    new AddressClaimDestination(add.Address);
+                claimRequest.PaymentMethodId = new PaymentMethodId("BTC", BitcoinPaymentType.Instance);
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception);
+                throw;
+            }
+        }
+
+
+        return args;
+    }
+}