> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usexfg.org/llms.txt
> Use this file to discover all available pages before exploring further.

# What is HEAT

> HEAT is Fuego’s flatcoin — mint by burning XFG, hold or lock as a CD.

**HEAT** is Fuego’s native flatcoin: a colored / commitment-style asset intended to preserve purchasing power (peg reference **`HEAT_PEG_USD = 1.58`**, with CPI-adjustment design path). It is **not** a freezable USD stablecoin issuer product, and it is **not** minted by locking XFG into a “CD.”

## How HEAT is created (current)

1. You hold **XFG**.
2. You call **`mintHeatV10()`** (wallet) — XFG is **burned**.
3. HEAT is minted using **Hearth pool TWAP** pricing (spot pool rate if TWAP unavailable).

```
heatMinted ≈ xfgBurned × 10^18 / twap
```

Do **not** use legacy `convertXfgToHeat()` (fixed 10M:1 Embers\_Heat ratio) for real minting.

## What HEAT is for

| Use                        | Description                                         |
| -------------------------- | --------------------------------------------------- |
| **Hold / transfer**        | Private medium of exchange within Fuego             |
| **Certificate of Deposit** | Lock HEAT for a term; earn yield from protocol fees |
| **Hearth trading**         | Swap XFG ↔ HEAT on the on-chain market              |

## What HEAT is not

| Myth                                        | Reality                                                                                      |
| ------------------------------------------- | -------------------------------------------------------------------------------------------- |
| “Lock XFG to get a CD”                      | CDs lock **HEAT** after mint                                                                 |
| “HEAT only via STARK burn2mint on Ethereum” | Primary path is **on-chain mint** (`mintHeatV10`). Historical STARK burn docs are deprecated |
| “Embers\_Heat = HEAT”                       | Embers\_Heat is legacy / removed product language                                            |
| “Stablecoin with freeze”                    | No issuer freeze; CryptoNote privacy model                                                   |

## Stylized mark

Marketing may show **ΗΞΔŦ**. Product, RPC, and docs body use **HEAT**.

## Next

* [Mint HEAT](/features/heat/mint-heat)
* [How CDs work](/features/commitment-deposits/how-cds-work)
* [How Hearth works](/features/hearth/how-hearth-works)