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PRC-5: Paima Inverse Projection Interface for ERC1155

  • Core Idea: An adaptation of the PRC-3 Inverse Projection standard specifically for semi-fungible tokens, using the ERC1155 standard.
  • Problem Solved: PRC-3 is designed for unique, non-fungible assets. Many in-game items, like crafting materials, gold, or potions, are fungible or semi-fungible. PRC-5 provides a standard way to represent these L2 assets as tradable ERC1155 tokens on an L1.
  • How it Works (High Level): The mechanism is nearly identical to PRC-3, but the L1 smart contract is an ERC1155-compliant contract. This means the minting process and metadata are designed to handle quantities. For example, a user can project 1000 units of in-game gold into a single ERC1155 token with a quantity of 1000 on the L1.
  • Key Components:
    • IInverseProjected1155 (Solidity): A modified ERC1155 interface.
    • Amount Tracking: The contract and metadata are designed to handle token quantities, a core feature of the ERC1155 standard.
    • Batch Operations: Supports standard ERC1155 functions like burnBatch.
    • Partial Initialization Logic: The specification accounts for scenarios where a user mints a different quantity on the L1 than what they locked on the L2.