Definition
A routing node is a Lightning Network node that forwards payments on behalf of others, earning fees for the liquidity and connectivity it provides. Because no participant opens a direct channel with everyone they transact with, routing nodes form the connective tissue that lets a payment hop from sender to recipient across multiple channels.
How routing works
The sending node consults the public channel graph, gossiped under the BOLT 7 specification, to find a path with sufficient liquidity on the correct side of each channel. It then wraps per-hop instructions in a Sphinx onion. Each routing node peels only its own layer, learning just enough to verify the fee and timelock terms and to forward a matching HTLC to the next hop. No intermediary sees the full route, the ultimate sender, or the final recipient.
Fees and liquidity
A routing node advertises a base fee (a flat charge per forward) plus a fee rate (proportional to amount). Profitability depends on having balanced liquidity, good uptime, and well-connected channels. Running a reliable routing node is an exercise in liquidity management, the same discipline behind inbound liquidity.
Routing nodes that go offline risk missing channel breaches, which is why many delegate monitoring to a watchtower.
In Simple Terms
A routing node is a Lightning Network node that forwards payments on behalf of others, earning fees for the liquidity and connectivity it provides. Because…