Glossário

Off-Chain Transaction

An off-chain transaction is defined as a second-layer protocol where the transactions occur on a network and move value outside of the blockchain.

What Is an Off-Chain Transaction?

Unlike an on-chain transaction in which crypto tokens are sent and received within a native blockchain network, an off-chain transaction is a phenomenon that takes place outside of the main blockchain. It is a solution to the slow and costly problems that users face while doing on-chain transactions. 
For example, Litecoin, Ethereum, and Dogecoin are all slightly different in their own ways, and they all share the same core DNA as Bitcoin, in a sense that they use a decentralized network to transmit and receive financial transactions, with nodes on these networks verifying each transaction inside the distributed ledger. Regardless of the currency, you choose to experiment with, blockchain technology has made it feasible to send currency around the world beyond regardless of your location.
As a result, people began looking for an alternative, which led to the development of the off-chain transaction with an enhanced second-layer solution that takes place outside of the main blockchain. With the help of these second-layer protocols, one can avoid the issues faced during an on-chain transaction by enabling a cheaper and faster process.
The second layer refers to the projects and protocols that are built on top of a base blockchain to improve the technology and user experience. These solutions are about extending the functionality of a blockchain beyond what its creators originally intended or what it was built to perform. When consumers of a large public blockchain believe it has flaws, they seek the second layer for solutions.
Two parties agree to a debt between them, which is the most basic form of an off-chain transaction. When you agree that you and another participant on the trading platform owe each other one Bitcoin, your agreement is a transaction that remains legitimate because you have mutual confidence.
Nothing touches the blockchain, and the transaction time is instantaneous - all that is required now is some math and you can agree on the balance due. At some time, you may also be able to repay the remaining debt with a single on-chain transaction that represents all of the behavior that led to this one payment.
Users can create a channel and exchange private keys with that wallet, allowing for off-chain fund transfers. They can continue to swap currency as much as they like as long as the channel is open, until they're ready to settle, at which time they can stop the channel and record the final value on-chain.
Off-chain protocols, unlike on-chain networks, are plentiful. The Lightning Network, Liquid Network, and others are among them. 

The following are some advantages: 

  • The scalability problem with blockchain technology can be solved using off-chain alternatives.
  • Off-chain transactions execute quickly as compared to on-chain transactions which can take a long time to confirm depending on network congestion. 
  • Off-chain transactions, which may have no fee at all until they are added to the blockchain, are likewise less expensive.
  • Off-chain transactions can also provide greater anonymity, as transaction details are not stored on the main blockchain and are not displayed publicly.
Off-chain transactions, however, have drawbacks. Liquid Network, for example, uses Bitcoin's decentralization for peg-in transactions, whereas it requires Bitcoin to be locked up and each payment channel has a finite capacity.
Off-chain transactions are best for those looking for transactions that are quick, cheap, and discreet