# 04.Mega Multi-Chain

1. NFT multi-chain (dual chain) storage system (patent registration) Multi-chain storage technology (solving fee problem) Currently, the most minted (issued) NFTs in the world are mostly issued on the ERC-721 protocol based on the Ethereum chain. However, the ERC-721 method has a speed problem as well as a continuously rising Ethereum fee (gas cost) problem. Mega Project applies KNCA's NFT multi-chain storage technology (KNCA patent), and automatically selects and stores a chain optimized for fee and speed issues among major main chains that have proven stability when issuing and storing NFTs. Algorithms are being applied.

On-off chain linkage technology (storage space problem solving) Due to the nature of the blockchain, only the unique hash value is stored due to the limitation of the storage space per block of the on-chain, and the original high-capacity NFTs such as photos and videos are not stored in the blockchain. "InterPlanetary File System) /Src: hash.kr A protocol for storing data in a distributed file system and sharing it over the Internet. The existing HTTP method was a method of finding the address where the data is located and fetching the desired content at once. IPFS works by using the hash value converted from the contents of the data to find the contents distributed and stored in various computers around the world, breaking the data into pieces, fetching them at high speed, and then displaying them together. It is stored as key/value pairs, and since numerous distributed nodes around the world store the information, users can store and retrieve data much faster than the existing HTTP method by using IPFS. . (Inter Planetary File System) By encrypting and storing the original in a distributed file system, the on-chain (hash value) and off-chain (original) are cross-verified by bridging to solve the problem of consistency and capacity of the original.
