Running The Block Lightning Node
summary
Block runs the LDK-based routing node formerly called C= and fronts Cash App and soon Square, serving 50 million monthly users and reporting 600% growth year over year with 1 in 4 outbound payments using Lightning. An automation layer called the node brain reads two years of data in Snowflake and runs workflows in Prefect, using fee-distribution CDFs and a flux metric to apply four heuristics: replenish channels, set fees, close unproductive channels, and harvest UTXOs. The system prefers open/close over rebalancing and mostly runs self‑sustaining.
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chapters (17)
- 0:00Running a Block Lightning node
- 1:02What is the Block Lightning Node
- 2:26Node Brain automation service
- 3:28Node Brain architecture
- 5:14Liquidity management tools
- 7:39Fee rate distributions
- 9:26Flux liquidity measurement
- 11:51Four automation heuristics
- 13:40Fee setting in practice
- 15:05Closing unproductive channels
- 16:26UTXO harvesting
- 17:32Node maintenance results
- 18:16Liquidity with Cash App
- 20:48Inbound liquidity generation
- 22:12Routing revenue
- 22:54Growing Lightning economy
- 24:09Q&A
