Lumens (XLM) serve as the foundational currency of the Stellar network, functioning as the sole token that operates without requiring an issuer or trustline. These digital assets play a critical role in facilitating transactions, covering network fees, and maintaining account stability within the ecosystem.
Core Functions of Lumens
Transaction Fees
Every transaction on the Stellar network incurs a nominal fee payable in XLM. This mechanism serves two primary purposes:
- Preventing ledger spam
- Prioritizing transactions during periods of high network activity
Smart contract transactions utilize a distinct fee structure based on:
- Inclusion fees
- Resource consumption (including storage rent)
👉 Discover how XLM powers decentralized finance platforms
Base Reserves and Minimum Balances
Stellar accounts must maintain a minimum balance calculated using base reserves:
- Current base reserve value: 0.5 XLM
- Minimum account requirement: 1 XLM (equivalent to 2 base reserves)
Additional reserves are required for subentries including:
- Trustlines (for assets and pool shares)
- Offers
- Signers
- Data entries
Example calculation for an account with:
- 1 trustline
- 2 offers
- 1 claimable balance with 1 claimant
Total minimum balance: 3.5 XLM
Smart Contract Rent
Unlike traditional ledger entries, smart contract data requires rent payments instead of base reserves. The rental cost depends on:
- Entry size
- Duration on ledger before archival
- Storage type (
Persistent,Temporary, orInstance)
Lumen Supply Dynamics
Key Supply Metrics
The Stellar network maintains transparent supply metrics available via API:
| Metric | Value (as of May 2024) | Description |
|---|---|---|
| Original Supply | 100,000,000,000 XLM | Initial network creation amount |
| Inflation Lumens | 5,443,902,087 XLM | Additional lumens from former 1% annual inflation |
| Burned Lumens | 55,442,115,112 XLM | Permanently removed from circulation |
| Total Supply | 50,001,786,974 XLM | Current existing lumens |
| Circulating Supply | 28,976,033,204 XLM | Actively traded and utilized lumens |
Important Address Categories
- Upgrade Reserve: Holds lumens for legacy token conversion
- Fee Pool: Accumulates network transaction fees
- SDF Mandate: Lumens allocated for Stellar Development Foundation operations
👉 Explore how XLM compares to other major cryptocurrencies
Frequently Asked Questions
Why does Stellar require transaction fees?
Transaction fees serve as spam protection and help prioritize network operations during high traffic periods. The minimal fee structure (typically fractions of an XLM) ensures accessibility while maintaining network integrity.
How can I check current XLM supply metrics?
The Stellar Dashboard API provides real-time supply data through endpoints that track:
- Total circulating supply
- Burned lumens
- Foundation-held amounts
- Fee pool accumulation
What makes XLM different from other cryptocurrencies?
Key differentiators include:
- No mining requirement (all lumens created at network launch)
- Built specifically for fast, low-cost transactions
- Integrated directly into Stellar's consensus mechanism
- Serves as both a transaction medium and network safeguard
How does account sponsorship work on Stellar?
The network allows accounts to sponsor reserves for others through specialized transactions. This enables:
- New users to access the network without initial XLM
- Developers to create onboarding solutions
- Temporary account funding for specific operations
For comprehensive technical details, refer to Stellar's official documentation on sponsored reserves.