> ## 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.

# Tutorial: mint HEAT and open a CD

> Two-step path: mint HEAT from XFG, then lock HEAT as a CD.

This tutorial is the **current** product path on testnet: mint HEAT, open a HEAT CD, wait for maturity, withdraw or rollover.

## What you need

* `fuegod --testnet` synced
* Wallet with **XFG** (testnet)
* Understanding: **CDs lock HEAT**, not XFG

## Step 1: Check XFG balance

```
balance
```

## Step 2: Mint HEAT

Use the wallet **HEAT mint / Burn2Mint** path that calls `mintHeatV10` (TUI: Burn2Mint / HEAT mint). Confirm HEAT balance after the mint confirms.

Do **not** treat legacy `cold` / “lock XFG” commands as the CD path.

## Step 3: Open a HEAT CD

```
deposit <heat_amount> <term_epochs>
```

Mainnet terms are 6–72 epochs; testnet allows shorter testing terms. Note deposit ID and maturity height.

## Step 4: Verify

List deposits in the wallet and confirm type **HEAT** / term-locked (not mint-only).

## Step 5: Wait for maturity

Testnet epochs are **10 blocks**. Watch height until maturity.

## Step 6: Withdraw or rollover

* Withdraw: receive HEAT + interest
* Rollover: new CD for principal + interest

```bash theme={null}
curl -X POST http://127.0.0.1:28280/rollover_deposit \
  -H 'Content-Type: application/json' \
  -d '{"deposit_id": "0", "new_term": 6}'
```

## Yield funding (for expectations)

CD yield is funded by protocol fees: atomic swap **1%** (69% to CD share) and Hearth **1%** (50% to CD share). Low volume → low yield.