Metro Pad

STATIONS

Every coin launched here is a pump.fun coin and a station on the map. The pad's program is the coin's creator, so the creator fee flows into the program and is split by fixed rules. The launch costs 0.02 SOL to the treasury; the dev may buy up to 2 SOL (and at most 10% of the supply) in the same transaction.

Each station keeps a station fund. Every 7 days the whole fund is spent in 12 small buys over 1 day, guarded by a median price, and every token bought is burned.

TUNNELS

Holders of two coins dig a tunnel between them by locking 1% of each coin's supply. A coin can also dig a Central line to SOL alone. The dig has 14 days.

Both sides full: anyone completes it, the whole escrow burns, and the line is open forever. Before that, any digger can undig and take his tokens back. Deadline passed without both sides full: the tunnel expires and every digger gets his tokens back (anyone can send them, the keeper does).

The diggers become the line's builders: their share of a side is their weight in the builder pay of that side.

RIDES

Through an open tunnel a ride sells coin A and buys coin B in one instruction (on the curve or on PumpSwap, whichever each coin trades on). On a Central line, a ride buys the coin with SOL. The smallest ride is 0.01 SOL in the middle.

The creator fee that ride paid is measured to the lamport around each leg and split: 40% back to the rider in the same transaction, 30% to the tunnel's builders (half per side, by weight), 30% to the devs. Builders claim any time; the keeper pushes pay of at least 0.002 SOL.

Rider and builders together get at most 70% of the creator part of the fee, which is smaller than the whole pump fee: washing a line always loses money.

FEES OF EVERY OTHER TRADE

SHARE	GOES TO
50%	The dev of the coin (claim any time; the keeper sends it)
30%	The station fund: weekly buy of the coin, every token burned
10%	$METRO buy-burn (bucketed until $METRO is set, then spent in chunks)
10%	Treasury

PARAMETERS

PARAMETER	NOW	BOUNDS
Launch fee	0.02 SOL	0.1 SOL max
Tunnel target per side	1% of supply	0.25% to 5%
Dig deadline	14 days	3 to 30 days
Smallest ride	0.01 SOL	0.001 to 0.1 SOL
Builder push minimum	0.002 SOL	0.0005 to 0.1 SOL
Station burst every	7 days	1 to 30 days
Burst length / buys	1 day / 12	1 h to 7 days / 1 to 48

Coins copy the station parameters at launch; tunnels copy target, deadline, smallest ride and push minimum when they open.

TRUST

No attestor, oracle or secret: every number on this site is read from the program's accounts.

The admin can pause new launches, tunnels and digs (rides, undigs and payouts keep working), change future parameters with a 24 h timelock, hand over roles with a 3 day timelock, and set the $METRO mint once (24 h). The admin cannot touch station funds, escrowed tokens, builder pay or the $METRO bucket.