Mining System Overview

What mining means in Bullion

Bullion mining is simple:

• Connect an EVM wallet on Robinhood Chain mainnet
• Buy a room (or use your free starter path)
• Equip miners that match the room’s tier limit
• Start mining — hash from all your rooms stacks

The active room is what you see in the room view, but every equipped miner in every room contributes hash while mining is on.

Core concepts

Term	Meaning
Room	A mining space you buy with ETH. Up to 32 instances per wallet.
Miner	Generates hash. Fixed tier — no leveling.
Loadout	Which miners are equipped in one room instance.
Room tier gate	Each room type only accepts miners up to a max tier (see table below).
Capacity	Up to 8 miners per room instance (default deploy — all room types).

Room rules (default deploy)

Each room type has:

• Up to 8 equipped miners per room instance
• A max miner tier — low rooms accept many small miners; high rooms accept everything
• A hash multiplier on every miner in that room
• An ETH price (admin can change via setPrices())

Room tier	Room	Max miners	Allowed miner tiers	Hash mult	Default ETH
1	Small Garage	8	T1–T2 only	1.00×	0.008
2	Warehouse	8	T1–T3	1.10×	0.006
3	Bunker	8	T1–T4	1.25×	0.02
4	Hangar	8	T1–T5	1.50×	0.06
5	Space Station	8	T1–T9 (all)	2.00×	0.20

Example: A Small Garage can hold 8 Basic Drills (T1) or 8 Turbo Bores (T2), or a mix — but you cannot equip a Magma Drill (T5) or Singularity (T9) there. The contract reverts with MinerTierTooHighForRoom.

Why buy a higher room?

1. Higher hash multiplier on every equipped miner in that room
2. Higher miner tiers allowed — stack stronger drills in one loadout
3. More total hash when you fill all 8 slots with the best miners that room allows

Rooms do not upgrade

There is no “upgrade room” action. To expand:

• Buy another instance of the same type (second garage = second 8-slot T1–T2 room), or
• Buy a higher tier room type (short cooldown before the next tier up — see below)

Each instance has its own loadout and own fuel timer.

Room tier cooldown (5 seconds)

After buying at your current highest room tier, wait 5 seconds before buying the next tier up. Duplicates of your current tier or any lower tier can be bought anytime.

Wallets that bought rooms under the old 12-hour rule may still have a legacy timer stored on-chain until the mine contract is upgraded (UpgradeMine.s.sol).

Miner tiers

Tier	Name	Base hash	Default buy (ETH)
1	Basic Drill	10	0.001*
2	Turbo Bore	25	0.003
3	Deep Seeker	50	0.008
4	Core Breaker	100	0.02
5	Magma Drill	250	0.05
6	Void Piercer	600	0.12
7	Nebula Rig	1,500	0.30
8	Quasar Unit	4,000	0.80
9	Singularity	10,000	2.00

* First 2 Basic Drills per wallet are free.

• Max 64 miners per wallet
• One miner → one room at a time
• No miner leveling — buy higher tiers or stack more units

Earnings (how much you can make)

See Mining Math for formulas. Quick reference at default emission 0.0001 GOLD per hash per second:

effectiveHash_per_miner = baseHash × roomMult × fuelMult
GOLD/day                = totalEffectiveHash × 8.64

Launch reference price used in examples: $0.00317 / GOLD (marketing reference only — not guaranteed).

Example — fill Small Garage with 8× Basic Drill (T1)

Step	Calculation
Base hash per miner	10
Room mult (Small Garage)	1.00×
Miners equipped	8
Total effective hash	8 × 10 × 1.0 = 80
GOLD/day	80 × 8.64 = 691 GOLD
≈ USD/day @ $0.00317	~$2.19

Example — fill Warehouse with 8× Deep Seeker (T3)

Step	Calculation
Base hash	50
Room mult (Warehouse)	1.10×
Per-miner effective	50 × 1.10 = 55
Total (8 miners)	8 × 55 = 440
GOLD/day	440 × 8.64 = 3,802 GOLD
≈ USD/day	~$12.05

Example — fill Space Station with 8× Singularity (T9)

Step	Calculation
Base hash	10,000
Room mult (Space Station)	2.00×
Per-miner effective	20,000
Total (8 miners)	160,000
GOLD/day	160,000 × 8.64 = 1,382,400 GOLD
≈ USD/day	~$4,382

These are theoretical solo-mining numbers. All players share the 14.7M GOLD mining pool — more hash online means less GOLD per hash over time.

Fuel boost (optional)

Fuel multiplies hash in one room instance for 6 hours (paid in GOLD):

Fuel tier	Multiplier	Default cost
2×	2.0×	2,000 GOLD
3×	3.0×	2,000 GOLD
5×	5.0×	2,000 GOLD

Example: Small Garage at 80 hash + 3× fuel → 240 effective hash → 2,074 GOLD/day (before pool dilution).

Mining flow

1. Connect wallet on Robinhood Chain
2. Buy a room (Small Garage default 0.008 ETH)
3. Buy / claim miners (2× free Basic Drill)
4. Equip miners that fit the room’s tier gate (Upgrades tab)
5. Start mining → claim GOLD every 6h (or pay GOLD to skip cooldown)

Onchain stack

Layer	Bullion uses
Network	Robinhood Chain mainnet (EVM, chain id 4663)
Contracts	Solidity (BullionMine.sol, etc.)
Reward token	GOLD (ERC-20)
Wallet	MetaMask, Robinhood Wallet, or any EVM wallet

Read next

• Mining Math (On-chain) — formulas, cooldowns, worked examples
• Mining Room Layout Demo — visual room interaction
• Tokenomics — supply, pool cap, taxes