Sharder Protocol is a cross-chain distributed storage protocol developed by Singapore Sharder Foundation.
The Sharder protocol has innovations in hardware and software such as cross-chain deployment, multi-chain architecture, storage sharing economy, proof of contribution, data privacy and trustworthiness, and all-in-one storage and mining machines.
The Sharder public chain is the first Sharder pool that implements the Sharder protocol, which includes the complete features of the Sharder protocol, and is also the anchor network in the Sharder multi-chain ecosystem. There are Bean Cloud, Sharder Matrix, Sharder Brain, One Fair, and other commercial applications jointly developed and implemented by Sharder and its partners.
Beanstalk will become a global blockchain storage service provider without a storage hard disk, and eventually evolve into: data formation -> data storage -> data is valuable -> data integration future blockchain data ecology. Let the data ownership return to the user, make the user's data valuable, and let the user's data no longer be silent.

Design principle

Node Unreliability Assumption: A loose but robust network organization structure that allows single points of failure and short-term node unavailability.
Ownership and Privacy: The data owner has ownership and full access to the data, and the data is encrypted and private. Other roles can access and use the data only after being authorized by the owner.
Quantifiable contribution: The contribution of all parties involved in the agreement should have corresponding quantitative standards and observable contribution. For example, PoST and PoR are used as quantitative proofs of storage space and storage time.
Final state consistency: Data objects are allowed to be in different states on different nodes, but their states can quickly converge to achieve network-wide consistency.
Monitorable and recoverable: It can detect the availability of the entire network and the status of the entire network of data objects, and can repair itself to a certain extent according to the strategy.
Auditable and Supervisable: A certain degree of supervision and audit can be carried out in certain specific fields or scenarios, provided that the data owner knows and agrees.
Extensible API: API with high extensibility and ease of use.

Project function

Blockchain layer
It is composed of necessary blockchain modules. Including: peer-to-peer network, UTXO model, distributed ledger and global Book model, native bean box currency.
Data Layer
Realizes the data operations defined in the Sharder Protocol, the sharding and backup of data objects, the role of observer, the role of witness, etc.
Asset Layer
Friendly scrambler account model, which associates tokens, data bean objects and scrambler accounts to form a digital asset model, providing digital asset management.
Component Layer
Abstracts and encapsulates some basic components, and provides various transaction models based on smart contracts.
Interface layer
External API, which is convenient for partners and merchants to use blockchain and storage services.
Contribution Quantification
Quantify the contribution of various roles to the Scrambler network. Different roles have different quantitative indicator functions, contributions will be rewarded, and evil will be punished. Contribution points will be included in the scrambler account.
Operational support
It is convenient for merchants to access the Sharder network and provide services for the entire life cycle of merchants. It also provides data statistics and analysis to help merchants and bean sprinters improve their operational quality.

Project Vision

Data Availability
According to the CAP theory, we must make a trade-off among Consistency, Availability, and Partition Tolerance. We assume a strategy: N = number of replicas, W = number of write replicas that must be completed for a successful write operation, and R = number of read replicas that must be completed for a successful read operation. The strategy is that we set the value of NWR to get a trade-off of CAP. For example, Amazon chose N3W2R2, which means that when two data copies fail, the affected part of the data becomes read-only and cannot be written. In the future, we will continue to study and optimize with reference to the current leading cloud storage service providers (Amazon, Facebook, Aliyun) to ensure better data availability on the basis of better performance. In order to reduce the overhead of computing resources and network I/O during data erasure, after implementing the classic RS erasure code, it will consider whether to implement SIMD technology acceleration and LRC (Locally Repairable Codes) erasure algorithm according to actual needs, such as FaceBook and XORing Elephants proposed by the University of California.
Digital Asset Management
There are already smart devices in many real estate sales halls to help you automatically open a bank electronic account and lock a certain amount. This part of the locked amount is the proof of the intention to buy a house and your assets. Homebuyers do not need to pay a certain amount of money to the real estate developer before signing the contract, and the real estate developer also locks in the buyer's intention to buy a house. However, digital assets in the non-banking system still do not have a good way to prove assets conveniently, and it is even difficult for you to prove that the tokens held in the trading account belong to you. Scraper Protocol provides POA through the role of the certifier, and the traceability and immutable features of the blockchain constitute a complete evidence chain and trusted data. In the future, it will provide a complete digital asset management and certification solution.
Trusted digital assets plus smart contracts can complete automatic transactions with weak or no trust. Many asset management and proof methods can also be derived, such as: transfer a specific amount of assets from an address to a certain public address at a specified time and under specified conditions (this is similar to zero-knowledge proof, and can prove that you are The holder of the digital asset address), after reaching a certain condition (reaching a certain time, or a certain forecast) automatically executes the operations agreed in advance in the smart contract.
Sharder File System
Sharder File System SFS (Sharder File System) will be upgraded on the basis of CloudAqua, which can not only increase the read and write throughput of a single node, but also Improve database throughput performance, allowing concurrent multi-process read and write. Can improve the IO performance of a large number of fragmented files. SFS is compatible with common log file systems such as Ext4, HFS+, and NTFS. With SFS, it is easier to deploy on nodes with different operating systems and physical environments.
Artificial Intelligence
In recent years, with the development of hardware, artificial intelligence has made great progress in supervised learning, confrontation network and other fields. The blockchain system itself is a natural soil with a variety of open data, and the bean scorpion protocol is built on the distributed network for storing data. How to label, classify, and train AI on these on-chain data is very challenging and attractive. The continuous learning of AI also helps to make the Sharder network more intelligent, secure, and efficient.

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