是否可以在我们的结构链代码/智能合约中使用外部节点模块？

Question

I am trying to write a chainCode and for the implementation of logic, I need to use an external node package, which is not a part of fabric API. Is it possible to do that?

I've never seen a chainCode example, which requires an external node module. If you know an example please share with me.

Also, if it is possible, I would like to know about the risks of doing that and what is the good design to minimize the risks.

Answer 1

'use strict'

const { Shim } = require('fabric-shim')

const path=require("path")

const fs=require('fs')

const examplecc = require('./lib/examplecontract.js')

function main(){

const tlsCertsPath=path.resolve(__dirname,"lib", "tls")

const tlsKey = fs.readFileSync( path.resolve(tlsCertsPath, "server.key"))
const tlsCert = fs.readFileSync(path.resolve(tlsCertsPath, "server.crt"))
const rootCert = fs.readFileSync(path.resolve(tlsCertsPath, "ca.crt"))
const config={
ccid:       
         

"examplecc:1177322ea1cb10e56c4499016dsdb2fbf0be155660e97a38ca48de76326b12362",

address:   "0.0.0.0:9992"}


 const server= Shim.server(new examplecc(),{
  

 ccid:    config.ccid,

    address: config.address,

    tlsProps: {
        disabled:      true,
        key:           tlsKey,
        cert:          tlsCert,
        clientCACerts: rootCert,
    }
} )


server.start().then((res)=>{
    console.log("Server running successfully @" + config.address )
})

}

main()