def AddInvoice(self, request, context): # Emulate utility work: Simulate a hash collision if request.value == 100000: context.set_code(grpc.StatusCode.ALREADY_EXISTS) context.set_details("Invoice with same hash already exists") return lnd_pb2.AddInvoiceResponse() # Normal emulation invoice = lnd_pb2.Invoice() invoice.r_hash = b"fakehash123" self.invoices[invoice.r_hash] = request return lnd_pb2.AddInvoiceResponse(r_hash=invoice.r_hash)
Introduction: Why Emulate LND? In the rapidly evolving world of Bitcoin’s Layer 2 scaling solution, the Lightning Network Daemon (LND) stands as one of the most popular implementations. However, developing, testing, and debugging applications on a live mainnet is dangerous. Making a mistake with real satoshis can lead to financial loss or, worse, the permanent loss of a payment channel. lnd emulator utility work
Creating a 10-node ring topology to test MPP (Multi-Path Payments) in zero real-world time. 3.3. regtest + btcd (The Blockchain Emulator) While not strictly "LND" emulation, running LND on Bitcoin’s RegTest (regression test mode) mode is the most authentic form of emulation. RegTest allows you to generate blocks instantly via RPC. Tools like bitcoind in RegTest act as the blockchain emulator, while LND runs as a real binary—but on a fake chain. Making a mistake with real satoshis can lead
Using Python’s grpcio and unittest.mock , you can create a fake LND server in under 50 lines. import grpc from unittest.mock import MagicMock import lnd_pb2 # Generated from LND proto files class MockLNDServer: def init (self): self.invoices = {} regtest + btcd (The Blockchain Emulator) While not