7.6 EVT Pools (National Pool / Store Pool)

EVT is not designed to come from anywhere with unlimited supply. The amount of EVT that can be excavated is managed through a two-layer structure: the National Pool and the Store Pool.

This page explains the pool structure that serves as the “source” of EVT.

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What you’ll learn on this page

• What the National Pool is (reserves, remaining balance, updates)

• Which country’s pool is consumed

• How it relates to the Store Pool (80% / 20%)

• How remaining balance affects difficulty (how easy it is to excavate)

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1) What is the National EVT Pool? (Reserves = remaining balance for the country)

The National EVT Pool represents the total amount of EVT that can be excavated within a country (i.e., its reserves).

• As users excavate EVT, the country’s remaining pool balance decreases.

• Each country is managed independently and does not share supply with other countries.

Update timing

National Pool status is updated daily at 00:00 UTC.

In the app, users can check:

• Store unlock status

• National remaining balance (pool status)

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2) Country-Based Management: Which Country’s Pool Is Consumed?

EVT pools are managed independently by country.

When you excavate EVT, the pool that is consumed is the one belonging to the country of the store where you performed the BIND.

Examples:

• BIND at a store in Japan → Japan’s National Pool is consumed

• BIND at a store in France → France’s National Pool is consumed

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3) Two-Layer Structure: National Pool (80%) / Store Pool (20%)

EVT is managed through a two-layer structure:

• National Pool: 80% (the base excavation allocation)

• Store Pool: 20% (a store-level additional allocation)

The “80% / 20%” refers to the design ratio of EVT supply sources. Which pool is actually applied to excavation depends on the store’s unlock status, remaining balance, and eligibility conditions.

What is the Store Pool?

The Store Pool is a store-level additional allocation that becomes active only when a specific user unlocks excavation rights for that store by using a Right Scroll (Excavation Right NFT).

In other words, “a store is unlocked” means: the user who exercised a Right Scroll for that store is granted access to the Store Pool (additional allocation). (It does not mean the Store Pool becomes available to all users.)

• The Store Pool is managed separately from the National Pool.

• The Store Pool can be used for excavation only when the right-holder meets the BIND requirements at that store.

When does it become “National Pool only”?

In the following cases, excavation at that store is based on the National Pool portion (80%) only:

• You have not exercised a Right Scroll for that store and do not hold Store Pool rights.

• The Store Pool balance has reached zero (depleted).

Note: Only one user can exercise a Right Scroll for the same store (see 7.9 for details).

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4) How does “more remaining balance = easier excavation” work?

SyFu reflects the following design principle in its difficulty system:

The more reserves remain, the easier excavation is. As reserves decrease, excavation becomes harder.

Difficulty changes based on National Pool consumption ratio

When the National Pool consumption ratio exceeds certain thresholds, excavation efficiency (difficulty factor) changes in stages.

Example thresholds:

• 50%

• 75%

• 90%

As each threshold is crossed, excavation efficiency is reduced. (See 7.7 for details.)

This creates an automatic balancing mechanism, where:

• excavation pace naturally slows as depletion progresses

• sudden supply expansion is suppressed

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Summary

EVT is managed through a layered control structure:

• Country-level reserves management (National Pool)

• Store-level excavation expansion (Store Pool)

• Difficulty adjustment based on the consumption ratio

Because of this structure, EVT is not a simple “unlimited issuance token.” It is designed to evolve in sync with remaining balance, ecosystem growth, and participation.

In the next page (7.7), we explain why EVT can be considered “practically finite,” based on the soft cap and stage-based unlocking design.