The Lightning Network
Free Banking in Bitcoin Chapter 8, continued
Last week in Free Banking in Bitcoin, I discussed how payments run in our current society. This week, I introduce the Lightning Network as a solution to bitcoin’s slow transactions and explore its benefits.
The criticism of bitcoin’s slow transactions with high finality ultimately gave rise to the Lightning Network, a second-layer solution for fast settlement. The Lightning Network operates by gathering transactions off the blockchain and only settling the final amount. As a simple example, Alice buys a car from Bob for 1 bitcoin, and later Bob buys a motorcycle from Alice for 0.3 bitcoin. Instead of logging these as two separate transactions on the blockchain, they can take place over the Lightning Network. At this point, the blockchain records the net amount of 0.7 bitcoin from Alice to Bob. The Lightning Network is a more complex, elaborate version of this simple example.
One of the key aspects of the Lightning Network is the trade-off it makes concerning transaction finality. On the main Bitcoin blockchain, transactions are considered final once they are included in a block and confirmed, making them irreversible and secure. However, because Lightning payments occur off-chain, they don’t benefit from the same level of finality immediately. Instead, Lightning payments are subject to the conditions set within the payment channels, and while they are fast and efficient, they are not instantly as final as on-chain transactions. This difference means that it is technically easier to reverse or dispute a Lightning payment within the channel before the final settlement on the blockchain. Despite this, the Lightning Network offers a decentralized method of transacting with Bitcoin, allowing for near-instant payments with lower fees, which is crucial for scaling Bitcoin’s usability in everyday transactions.
The Lightning versus Visa debate, in my view, misses the point. This debate emerged out of some in the Bitcoin community wanting to respond to Bitcoin’s slow settlement time.
