CobbleDollars: Sign Shops

• Sign shops let players trade items stored in a nearby chest using CobbleDollars balances.
• Place a chest, then attach a sign next to or on it. The sign faces players; the chest can be behind, below, or beside the sign.
• Sign format:
  • Line 1: [Buy] for players purchasing from the chest, [Sell] for players selling items into the chest.
  • Line 2: <amount> <item> (for example 1 iron_ingot or 32 Ultra Ball). The amount defaults to 1 if the first token is not a number.
  • Line 3: price such as $500 or 500.
  • Line 4 (optional): owner name. If set, buy sales pay the owner; sell shops require the owner to be online and solvent to pay the seller.
• Interacting with the sign (main hand) performs the trade:
  • Buy: deducts the price from the buyer, removes stock from the chest, and pays the owner if set.
  • Sell: removes the items from the player, deposits them into the chest, and pays the player (from the owner when specified).
• The mod checks CobbleDollars balances directly; if CobbleDollars is missing or cannot be reached, trades are blocked.

Notes and limitations

• Owner payouts when the owner is offline use CobbleDollars’ offline deposit hook when available; paying from offline owners is not supported.
• Only adjacent containers are scanned; if multiple containers are nearby, the one directly behind the wall sign is preferred, otherwise the first adjacent match is used.
• Double-chest logic defers to the single block entity closest to the sign; extremely custom containers may not behave as expected.