Sardine has new digital asset publishing requirements for different application platforms. It supports the issuance and circulation of digital assets at the bottom through SDE, and supports the issuance of digital assets of multiple Tokens through smart contracts and banks. The issuance of multiple tokens is based on the IOU model, and the role of the native currency SDE is: 1. to prevent network dust attacks; 2. Handling fees for asset transactions; 3. Dividends on income rights assets; 4. Deposit for ecological participation. Each transaction will consume a bit of SDE as a network fee, approximately 0.0001SDE. The busier the network, the more network fees it requires each time. The consumed network fees will flow back to the community, and the more they contribute to the ecology, the more SDE incentives they receive. Encourage pioneers who contribute more to the community....