# 8.1 Architecture

The marketplace consists of three interlocking layers — Trade, Display, and Governance.

1. Trade Layer

* Items can be listed or purchased on any chain (Solana, Ethereum, BNB Chain, Base)
* Inventory and pricing synchronize automatically through the multi-chain protocol.

2. Display Layer

* Each NFT includes its full timeline: origin enemy, forger ID, purification timestamp.
* High-rarity gear can be exhibited in seasonal public showcases or auctions.

2. Governance Layer

* Holders of $ARTHUR can propose new item categories, adjust market fees, and initiate community events such as “The Month of Blades.”


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