# 7.4 EVT Issuance & Circulation (Economics)

This page explains **how EVT increases, how it is used, and why it is designed to be inflation-resistant** from a system perspective.\
For EVT, tokenomics is centered on **issuance logic and circulation logic**, not a simple “allocation table.”

***

### What you’ll learn on this page

* How EVT is **issued (increases)**
* How EVT is **spent and how supply is naturally constrained**
* Why **inflation control is built into the design**

***

### 1) The “Increase” side: Controlled by BIND and pool design

EVT is **excavated (earned) through BIND**, which links payment data to user activity.\
Because of this, EVT is **not** designed to increase infinitely just because users participate.

In SyFu, EVT issuance is controlled through three mechanisms:

* **Pool structure** (where EVT comes from)
* **Cap design** (how much can be excavated)
* **Difficulty adjustment** (the pace of excavation)

#### Two-layer structure: National Pool / Store Pool

EVT is managed through a two-layer pool structure (see 7.6 for details):

* **National Pool**
* **Store Pool**

With this design, the excavatable supply is managed at both the country level and the store level,\
preventing supply from expanding all at once.

#### Difficulty adjusts automatically based on National Pool status

As the National Pool is consumed (remaining balance decreases),\
**excavation efficiency (i.e., how easy or strict the conditions are) adjusts automatically** (see 7.6 / 7.7).

In short:

> the more excavation progresses, the more the excavation pace tends to slow down.

This is a self-adjusting structure.

***

### 2) The “Use” side: EVT is designed to circulate as it is spent

EVT is not meant to be earned and held indefinitely.\
It is designed to circulate through in-game usage, which in turn helps constrain **circulating supply**.

#### Major circulation actions

* **Breeding**\
  Spent EVT is locked, and a portion is burned.\
  Example: lock + 7.5% burn
* **Naturalization (Uncommon → EVT)**\
  Part of the locked amount may be returned, while a portion is burned.\
  Example: an additional 7.5% burn (15% total reduction round-trip)
* **Lifespan recovery**\
  In recovery flows that consume NFTs, NFT supply is also reduced at the same time.\
  Example: using an Uncommon burns the NFT, and the related locked EVT is also burned

#### Key takeaway

Within EVT’s design:

* earned (supply)
* spent (consumption)
* reduced (burn)

are integrated into the same game loop.

As a result, EVT is **not** a “mint-and-expand forever” structure —\
it is designed so that supply can be naturally constrained through ongoing circulation.

***

### 3) Right Scroll is an “unlock gear”

Right Scroll (Excavation Right NFT) unlocks excavation rights on the Store Pool side (see 7.9).

It is not just an item — it functions as a **gear that can adjust the excavation pace** depending on ecosystem conditions.

* The more stores are unlocked, the more excavatable supply accumulates in that country
* To avoid excessive supply expansion, the system balances this with National Pool difficulty and other controls
* Store Pool excavation efficiency can increase (example: +20%)

***

### Summary: EVT is designed as a loop of “increase, use, control”

EVT’s economic design is built on three integrated components:

1. **Manage issuance through BIND and pools**
2. **Circulate through in-game spending, naturally constraining supply**
3. **Adjust excavation pace through Right Scroll and difficulty mechanisms**

Because of this structure, EVT is not a simple issuance-based token —\
it is designed so that **supply-demand dynamics evolve in sync with actual usage**.


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