Architected and expertly refactored contracts for tokensrepresenting pivotal assets within the immersive metaverse. Developed EIP-1155 and EIP-721 contracts for mintingtokens, including rare armor, combat swords, and commonassets. Pioneered token rarity determination by burningERC20 tokens during minting. Created an optimized ERC721 token contract for valuablemetaverse real estate. Tokens are grouped into five Quads. Developed tunnel contracts for these tokens using Matic'sFX Portal. Developed a multi-order feature with EIP-712-basedvalidation by forking Rarible. Explored decentralized royalty options, and opted for EIP- 2981 via splitters with custom governance splits forstreamlined UGC client contract royalty sharing. Developed migration scripts for estate tokens, resolving FX- Portal contract issues. Achieved comprehensive use casecoverage and optimized gas efficiency through tokengrouping into quads, highlighting technical prowess andproblem-solving skills.