Stellar (XLM) is a decentralized, open-source blockchain network that facilitates swift and low-cost cross-border transactions between any pair of currencies. It aims to connect financial institutions, payment systems, and individuals to create a more inclusive global financial infrastructure.
How Does Stellar (XLM) Work?
The operation of the Stellar network hinges on multiple things: Stellar Consensus Protocol (SCP), Stellar Core, Anchors, Assets, and the decentralized exchange. Below, we take a look at what these offer users.
Stellar Consensus Protocol (SCP)
Stellar’s consensus mechanism, the Stellar Consensus Protocol (SCP), represents a significant departure from traditional blockchain consensus mechanisms like proof-of-work (PoW) or proof-of-stake (PoS). SCP is built upon the Federated Byzantine Agreement (FBA) principles, focusing on flexibility, scalability, and energy efficiency.
Federated Byzantine Agreement (FBA)
The core idea behind FBA, and by extension SCP, is the concept of decentralized trust. Unlike systems requiring universal agreement among participants, FBA allows nodes in the Stellar network to choose a subset of other nodes they trust to validate transactions. This subset is known as a quorum slice. The innovation here is that trust is individualized; each node has one or more quorum slices reflecting its trust decisions.
The Consensus Process in SCP
The consensus process in SCP unfolds through two main phases: the nomination phase and the balloting phase, followed by a final confirmation step.
- Nomination Phase: This phase kickstarts the consensus process, where nodes propose what they believe should be the next set of transactions to confirm. Through several proposals and responses, certain transaction sets gain majority support within different quorum slices.
- Balloting Phase: Following the nomination phase, nodes engage in a more structured series of votes, or ballots, aimed at reaching a definitive agreement on the transaction set. This phase is meticulously designed to ensure that, despite initial disagreements, nodes converge on a single set of transactions to apply to the ledger.
- Confirmation: Once a consensus is reached, the agreed-upon set of transactions is applied to the ledger, synchronizing the state of the blockchain across the entire network.
Ensuring Safety and Liveness
SCP’s design meticulously balances safety and liveness. Safety in this context means the network will not validate conflicting transactions, ensuring consistency. Liveness refers to the network’s ability to continue processing transactions even in adverse conditions, such as network partitions or the presence of malicious actors. SCP achieves this balance through its flexible trust model, where the network can reach consensus without requiring unanimous agreement or suffering from a single point of failure.
Advantages Over Traditional Mechanisms
SCP’s departure from the energy-intensive processes used in PoW or the wealth-concentration risk of PoS presents several advantages. It’s significantly more energy-efficient, allowing for a greener blockchain solution. Transactions are confirmed within seconds, offering a rapid settlement ideal for financial applications. The flexible trust model enhances network resilience and scalability, as consensus does not hinge on every node’s agreement but rather on the overlapping consensus of trusted quorum slices.
In essence, SCP enables Stellar to provide a secure, scalable, and efficient platform for financial transactions and applications, marked by quick confirmation times and reduced operational costs, while maintaining a decentralized and flexible trust network.
Anchors
Anchors act as bridges between the Stellar network and traditional financial systems, allowing users to deposit and withdraw fiat currency in exchange for Stellar’s digital assets. Users can send fiat currency to an anchor, which then issues the equivalent amount in a digital asset on the Stellar network.
This process enables seamless currency exchange and cross-border transactions. Anchors are trusted entities such as banks, payment processors, or other financial institutions.
Decentralized Exchange (DEX)
Stellar includes a built-in decentralized exchange where users can trade assets issued on the network without the need for a central authority. The DEX supports limit and market orders, allowing users to trade directly from their wallets. This feature facilitates liquidity and enables easy currency exchange, contributing to Stellar’s goal of financial inclusion.
Assets and Tokens – XLM
XLM, or ‘Lumens’, is the native digital currency of the Stellar network, designed to facilitate multi-currency transactions and prevent spam on the network. As an integral part of Stellar’s ecosystem,…
Read More: Investing in Stellar (XLM) – Everything You Need to Know