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The Particle Bridge is a purpose-built smart contract designed to facilitate the bi-directional conversion between ERC721 and ERC20 tokens. The Particle Bridge enables the creation of xTokens, a new fungible token standard that represents fractional NFTs.
PGFK (non-fungible ERC721) and xPGFK (fungible ERC20) will be the first tokens allowed on the Particle Bridge. Users may decide to convert between token forms in order to take advantage of different rewards and benefits. The fluidity between ERC721 and ERC20 token forms enables a unique "dual state asset" - an asset that carries complimentary but different benefits in each of its forms.