Hearth — Fuego’s On-Chain Exchange
The market where ΗΞΔŦ finds its price — and where your XFG becomes more than a balance.Step into the Hearth
Fuego is a blockchain that mints its own money — ΗΞΔŦ, the flatcoin — and Hearth is where that money lives, moves, and grows. It’s an exchange that runs on the chain itself: no custody, no order books held by a company, no waiting on a centralized venue to decide what anything is worth. Every price on Hearth is discovered by the people trading on it — one clearing price, once per block, for everyone. This brochure is about what Hearth lets you do. Pick a path:Swap
The simplest door in: hand over one asset, receive the other at the market’s current price, settled on-chain in the same block you asked. No account, no KYC, no middleman — your wallet is your exchange account.- XFG → ΗΞΔŦ: sell XFG into the pool, receive ΗΞΔŦ.
- ΗΞΔŦ → XFG: buy XFG with ΗΞΔŦ.
sell_xfg shows what you’ll receive, where it leaves the pool’s price, and what minting the same XFG would give instead, then asks before it sells.
You always set a minimum you’re willing to accept, so a fast-moving market can’t fill you at a price you didn’t agree to.
--rpc-bind and walletd) the same trades are sell_xfg and buy_xfg, or amm_swap with direction 0 or 1. Minting is heat_mint.
Want ΗΞΔŦ without buying it? You can also mint it — burn XFG and receive fresh ΗΞΔŦ at Hearth’s discovered price. See minting ΗΞΔŦ.
Limit orders
Maybe you don’t want the price right now — you want your price. Post a bid or an ask backed by real funds, and Hearth fills it automatically the moment the market crosses your level. Set it and walk away: fills, partial fills, and proceeds are all credited on-chain and claimable whenever you come back.- Buy ΗΞΔŦ below the market and wait for the pullback.
- Sell ΗΞΔŦ at your target and let the market come to you.
The fee schedule is on your side when you post: makers pay nothing — and actually get paid (see below). Takers pay 1%, 70% of which flows to ΗΞΔŦ CD holders.
Earn as a maker
Every order that fills as the maker side — the liquidity someone else traded against — earns a 30% rebate of the taker fee. Post liquidity on Hearth and your resting orders don’t just wait: they work. The rebate lands in your order’s proceeds automatically. There’s no separate command — it’s what your limit orders do by default. Post both sides at prices you believe in, and the market pays you for quoting it.Provide liquidity
If you believe in the pair, become part of its depth. Add XFG and ΗΞΔŦ to the pool in a balanced pair, and you own a proportional slice of every trade’s flow:- Your share of the pool’s trading P&L as prices move.
- The 30% maker share of fees whenever the pool is the counterparty.
- Withdraw anytime by burning your LP shares for your proportional reserves.
Add liquidity with no args first — the pool expects a balanced pair at its current ratio, and it’ll tell you exactly what that is.
Own ΗΞΔŦ — and make it earn
Hearth’s 70% fee share feeds a yield pool for ΗΞΔŦ Certificates of Deposit. So the very same ΗΞΔŦ you trade on Hearth can be locked into a CD that earns protocol revenue — funded by real fees, never by printing. Buy your ΗΞΔŦ on Hearth (swap or limit order, or mint it), then lock it:Your money, your rules
Everything you commit to Hearth stays yours:- Every order is backed — funds sit in escrow on-chain; nothing exists as an unbacked promise.
- Partial fills accumulate on your order, claimable with your deposit.
- Expired orders return everything — deposit plus proceeds — automatically claimable.
- One price per block — no race to the front of the queue, no sandwich games.
Continue reading: mint ΗΞΔŦ · ΗΞΔŦ Certificates of Deposit · provide liquidity, in depth · the fee model · the technology