Xcoin holds value. Lumero moves it. Two assets, two jobs, designed to work together.
Scarce, mineable, post-quantum. Audited and designed for long-term value preservation. XAT is what you hold — the asset that doesn't move much because it doesn't need to.
Fast, mobile-first, backed by XAT in the reserve pool at 1.5× coverage. Built for remittances, merchants, payroll, and infrastructure finance. UMX is what moves — in seconds, anywhere, for very little.
Four design decisions that make XAT a credible long-duration reserve asset.
The same primitive Bitcoin pioneered: real cost, real hardware, real time. Honest mining keeps reserve assets honest. There is no shortcut from compute spent to coins issued.
5-minute block target. 100 XAT block reward in Era 1, halving on Bitcoin's discipline.
Linear Weighted Moving Average difficulty adjustment with a 25-block window and 2× clamp. Activated at block 1322. Smart Emergency Difficulty Adjustment fires when block solve time exceeds 600s — the chain refuses to stall.
XAT uses a hybrid witness v2 address format with ML-DSA-65 (FIPS 204) post-quantum signatures. New addresses default to post-quantum-only.
Every standard SHA-256 ASIC works: Bitaxe, NerdMiner, MacMetalMiner (native Apple Silicon GPU), Antminer, Whatsminer. Four regional pools (Virginia, Mumbai, California, São Paulo) support PPLNS (port 3333) and solo (port 7777).
Bitcoin's monetary discipline, post-quantum security. No discretionary issuance, no foundation drift.
Hard maximum supply, no mechanism to exceed. New XAT is created only by miners solving valid blocks — same primitive Bitcoin proved over fifteen years.
Genesis allocation of 20,000,000 XAT is split across nine published, source-traceable allocations. No hidden tranche, no foundation discretion, no premine drift.
XAT backs every UMX in the system at a 1.5× coverage ratio enforced at the bridge. The reserve is the gravity well: every UMX in circulation is anchored to scarce, mined XAT in protocol custody.