DigiDaigaku's parent company, Limit Break, has launched an NFT market protocol contract "Payment Processor" compatible with ERC721-C and programmable royalties, which can be used to perform trustless verification of NFT transactions, and pay all sellers, markets, and royalties without chain Under the transaction manipulation. "Payment Processor" supports transactions of any ERC-721 or ERC-1155 tokens. Payment can be made with native tokens (including ETH, etc.) or any ERC-20 tokens, and creators can also customize payment methods. In addition, "Payment Processor" has multiple security settings, allowing creators to control transaction whitelists, payment method whitelists, pricing restrictions, etc.