https://docs.aelf.com/assets/js/6a45c838.d33dcaf9.js

1"use strict";(self.webpackChunkaelf_docs_cms=self.webpackChunkaelf_docs_cms||[]).push([[9569],{64081:(e,n,t)=>{t.r(n),t.d(n,{assets:()=>a,contentTitle:()=>l,default:()=>m,frontMatter:()=>s,metadata:()=>o,toc:()=>d});var r=t(74848),i=t(28453);const s={sidebar_position:2,title:"Core Implementation"},l="Design Principles",o={id:"learn/core/implementation/index",title:"Core Implementation",description:"Design Principles",source:"@site/docs/learn/core/implementation/index.md",sourceDirName:"learn/core/implementation",slug:"/learn/core/implementation/",permalink:"/learn/core/implementation/",draft:!1,unlisted:!1,tags:[],version:"current",sidebarPosition:2,frontMatter:{sidebar_position:2,title:"Core Implementation"},sidebar:"learn",previous:{title:"Core Introduction",permalink:"/learn/core/introduction/"},next:{title:"Cross Chain",permalink:"/learn/cross-chain"}},a={},d=[{value:"OS",id:"os",level:2},{value:"Kernel",id:"kernel",level:2},{value:"Structure of the Project",id:"structure-of-the-project",level:2},{value:"Jobs and Event Handlers",id:"jobs-and-event-handlers",level:2},{value:"Modules",id:"modules",level:2},{value:"Testing",id:"testing",level:2}];function c(e){const n={h1:"h1",h2:"h2",img:"img",li:"li",ol:"ol",p:"p",strong:"strong",ul:"ul",...(0,i.R)(),...e.components};return(0,r.jsxs)(r.Fragment,{children:[(0,r.jsx)(n.h1,{id:"design-principles",children:"Design Principles"}),"\n",(0,r.jsx)(n.p,{children:(0,r.jsx)(n.img,{alt:"Design Principles",src:t(36596).A+"",width:"960",height:"660"})}),"\n",(0,r.jsx)(n.p,{children:"The diagram above shows the conceptual structure of the node and the separation between the OS and Kernel."}),"\n",(0,r.jsx)(n.h2,{id:"os",children:"OS"}),"\n",(0,r.jsxs)(n.p,{children:["The ",(0,r.jsx)(n.strong,{children:"OS layer"})," implements the application and infrastructure layers for the network. It also handles high-level network events and jobs, such as synchronizing the chain in response to a block announcement. Additionally, the OS layer includes the RPC implementation for the exposed API."]}),"\n",(0,r.jsx)(n.h2,{id:"kernel",children:"Kernel"}),"\n",(0,r.jsxs)(n.p,{children:["The ",(0,r.jsx)(n.strong,{children:"Kernel"})," contains smart contract execution primitives and definitions. It also defines the components necessary for accessing the blockchain's data. Various managers use the storage layer to access the underlying database."]}),"\n",(0,r.jsx)(n.p,{children:"The Kernel also introduces the concept of plugins. The diagram shows that side chain modules are implemented as plugins."}),"\n",(0,r.jsx)(n.h2,{id:"structure-of-the-project",children:"Structure of the Project"}),"\n",(0,r.jsx)(n.p,{children:"To understand aelf's structure, this section provides an overview of the solution."}),"\n",(0,r.jsxs)(n.p,{children:["Conceptually, aelf is built on two main layers: ",(0,r.jsx)(n.strong,{children:"OS"})," and ",(0,r.jsx)(n.strong,{children:"Kernel"}),"."]}),"\n",(0,r.jsxs)(n.ul,{children:["\n",(0,r.jsxs)(n.li,{children:[(0,r.jsx)(n.strong,{children:"OS Layer:"}),"\n",(0,r.jsxs)(n.ul,{children:["\n",(0,r.jsx)(n.li,{children:"Contains high-level definitions for a node and endpoints like RPC and P2P."}),"\n"]}),"\n"]}),"\n",(0,r.jsxs)(n.li,{children:[(0,r.jsx)(n.strong,{children:"Kernel Layer:"}),"\n",(0,r.jsxs)(n.ul,{children:["\n",(0,r.jsx)(n.li,{children:"Contains logic and definitions for smart contracts and consensus."}),"\n"]}),"\n"]}),"\n"]}),"\n",(0,r.jsxs)(n.p,{children:["aelf has a native runtime for smart contracts implemented in ",(0,r.jsx)(n.strong,{children:"C#"}),", for contracts written in C#. This implementation is found in the ",(0,r.jsx)(n.strong,{children:"AElf.Runtime.CSharp."})," projects."]}),"\n",(0,r.jsxs)(n.p,{children:["A significant part of aelf is the side chain framework. It is mainly implemented in the ",(0,r.jsx)(n.strong,{children:"AElf.CrossChain"})," namespace, defining the main abstractions in the ",(0,r.jsx)(n.strong,{children:"core"})," project and an implementation with gRPC in the ",(0,r.jsx)(n.strong,{children:"AElf.Crosschain.Grpc"})," project."]}),"\n",(0,r.jsxs)(n.p,{children:["The ",(0,r.jsx)(n.strong,{children:"AElf.Test"})," solution folder contains all the tests. Ensuring maximum coverage of the main functional aspects is crucial for maintaining the quality of our system."]}),"\n",(0,r.jsx)(n.p,{children:"Other projects implement libraries we use, like the crypto library, and others for infrastru

1cture, like the database library. While not as critical, they are still worth exploring."}),"\n",(0,r.jsx)(n.h2,{id:"jobs-and-event-handlers",children:"Jobs and Event Handlers"}),"\n",(0,r.jsx)(n.p,{children:"Event handlers implement the logic that reacts to external and internal events. They represent the higher levels of the application, being called by the framework in a domain-agnostic manner. Event handlers, primarily using other services, influence the state of the chain."}),"\n",(0,r.jsx)(n.h2,{id:"modules",children:"Modules"}),"\n",(0,r.jsxs)(n.p,{children:["Our architecture is based on modules that are wired together at runtime. Any new module must inherit from ",(0,r.jsx)(n.strong,{children:"AElfModule"}),"."]}),"\n",(0,r.jsx)(n.p,{children:"To implement a new module, follow these steps:"}),"\n",(0,r.jsxs)(n.ol,{children:["\n",(0,r.jsx)(n.li,{children:"Write the event handler or the job."}),"\n",(0,r.jsx)(n.li,{children:"Implement the interface and create a manager or infrastructure layer interface if needed."}),"\n",(0,r.jsx)(n.li,{children:"Implement the infrastructure layer interface in the same project if no additional dependencies are required."}),"\n",(0,r.jsx)(n.li,{children:"Implement the infrastructure layer interface in another project if it requires third-party dependencies (e.g., adding gRPC, MongoDB, or MySQL in the new project)."}),"\n"]}),"\n",(0,r.jsxs)(n.p,{children:[(0,r.jsx)(n.strong,{children:"Example:"})," The P2P network module."]}),"\n",(0,r.jsxs)(n.p,{children:["The networking code is defined across two modules: ",(0,r.jsx)(n.strong,{children:"CoreOSAElfModule"})," and ",(0,r.jsx)(n.strong,{children:"GrpcNetworkModule"}),". The OS core defines and implements the application service (used by other components of the node) as it is part of the application/domain logic. The infrastructure layer (like the server endpoint) is defined in the OS core modules but implemented in another project that relies on a third party, such as gRPC."]}),"\n",(0,r.jsx)(n.h2,{id:"testing",children:"Testing"}),"\n",(0,r.jsx)(n.p,{children:"When writing a new component, event handler, or method, it is important for aelf's quality to consider the corresponding unit test. As previously mentioned, we have a solution-wide test folder where we place all the tests."})]})}function m(e={}){const{wrapper:n}={...(0,i.R)(),...e.components};return n?(0,r.jsx)(n,{...e,children:(0,r.jsx)(c,{...e})}):c(e)}},36596:(e,n,t)=>{t.d(n,{A:()=>r});const r="data:image/webp;base64,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