MPFlow Uses Graph RL for Budget-Constrained Liquidity Placement on Lightning Network

arXiv·low signal

MPFlow (arXiv 2607.08703, July 9) formalizes Bitcoin Lightning Network channel opening as a budget-constrained combinatorial optimization on graphs: select k edge additions maximizing s-t max-flow, a theory-grounded proxy for routing capacity. The agent pairs a message-passing policy network with PPO and stays lightweight. Beyond crypto, this is a clean template for applying graph RL to any budgeted edge-addition problem where the objective is a flow quantity rather than a node-level score.