Question

问题：

我对Hyperledger面料非常陌生。我在fabric-samples的chaincode文件夹内创建一个chaincode。这就是我的文件结构。

在lib文件夹中，我签了合同。看起来就是这样。

"use strict";

const { Contract } = require("fabric-contract-api");

const util = require("util");

class Landreg extends Contract {
  async initLeger(ctx) {
    console.info("============= START : Initialize Ledger ===========");
    const lands = [
      {
        location: "Kottawa",
        owner: "Tharindu",
        size: "1 acres",
        sale: false
      },
      {
        location: "Bandaragama",
        owner: "Shanilka",
        size: "15 hectare",
        sale: false
      }
    ];

    for (let i = 0; i < lands.length; i++) {
      lands[i].docType = "land";
      await ctx.stub.putState(
        "LAND" + i,
        Buffer.from(JSON.stringify(lands[i]))
      );
      console.info("Added <--> ", lands[i]);
    }
    console.info("============= END : Initialize Ledger ===========");
  }

  async queryLand(ctx, landNumber) {
    const landAsBytes = await ctx.stub.getState(landNumber); // get the land from chaincode state
    if (!landAsBytes || landAsBytes.length === 0) {
      throw new Error(`${landNumber} does not exist`);
    }
    console.log(landAsBytes.toString());
    return landAsBytes.toString();
  }

  async createLand(ctx, landNumber, location, owner, size) {
    console.info("============= START : Create Land ===========");

    const land = {
      location,
      docType: "land",
      size,
      owner,
      sale: "false"
    };

    await ctx.stub.putState(landNumber, Buffer.from(JSON.stringify(land)));
    console.info("============= END : Create Land ===========");
  }

  async queryAlllands(ctx) {
    const startKey = "LAND0";
    const endKey = "LAND999";

    const iterator = await ctx.stub.getStateByRange(startKey, endKey);

    const allResults = [];
    while (true) {
      const res = await iterator.next();

      if (res.value && res.value.value.toString()) {
        console.log(res.value.value.toString("utf8"));

        const Key = res.value.key;
        let Record;
        try {
          Record = JSON.parse(res.value.value.toString("utf8"));
        } catch (err) {
          console.log(err);
          Record = res.value.value.toString("utf8");
        }
        allResults.push({ Key, Record });
      }
      if (res.done) {
        console.log("end of data");
        await iterator.close();
        console.info(allResults);
        return JSON.stringify(allResults);
      }
    }
  }
  async changeLandOwner(ctx, landNumber, newOwner) {
    console.info("============= START : changeLandOwner ===========");

    const landAsBytes = await ctx.stub.getState(landNumber); // get the land from chaincode state
    if (!landAsBytes || landAsBytes.length === 0) {
      throw new Error(`${landNumber} does not exist`);
    }
    const land = JSON.parse(landAsBytes.toString());
    land.owner = newOwner;

    await ctx.stub.putState(landNumber, Buffer.from(JSON.stringify(land)));
    console.info("============= END : changeLandOwner ===========");
  }

  async makeLandForSale(ctx, landNumber) {
    console.info("============= START : makeLandForSale ===========");

    const landASBytes = await ctx.stub.getState(landNumber);
    if (!landASBytes || landASBytes.length === 0) {
      throw new Error(`${landNumber} does not exit`);
    }
    const land = JSON.parse(landASBytes.toString());
    land.sale = "true";
    await ctx.stub.putState(landNumber, Buffer.from(JSON.stringify(land)));
    console.info("============= END : makeLandForSale ===========");
  }
}

module.exports = Landreg;

这就是我的index.js的样子。

/ * * SPDX许可证标识符：Apache-2.0 * /

“使用严格”；

const Landreg = require（“ ./ lib / landreg”）;

module.exports.Landreg = Landreg; module.exports.contracts = [Landreg];

我打了$（npm bin）/ fabric-chaincode-node --peer.address localhost：7052，但这给我留下了这样的错误。

$ $(npm bin)/fabric-chaincode-node --peer.address localhost:7052
cli.js <command>

Commands:
  cli.js start [options]  Start an empty chaincode

Options:
  --help         Show help  [boolean]
  -v, --version  Show version number  [boolean]

Not enough non-option arguments: got 0, need at least 1

我在landreg目录中命中了此命令。有人可以帮助我解决此问题并使它可在同行中安装吗？谢谢！！

Answer 1

我没有使用此命令，而是使用脚本startFabric.sh安装在对等方中。执行此行后，请使用以下 docker exec 脚本运行。

docker-compose -f ./docker-compose.yml up -d cli

依次执行这些行。

docker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp" cli peer chaincode install -n landreg -v 1.0 -p "/opt/gopath/src/github.com/strains/javascript" -l "node"

docker exec -e "CORE_PEER_LOCALMSPID=Org1MSP" -e "CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp" cli peer chaincode instantiate -o orderer.example.com:7050 -C mychannel -n landreg -l "node" -v 1.0 -c '{"Args":[]}' -P "OR ('Org1MSP.member','Org2MSP.member')"

请确保您的服务名称应与chaincode父文件夹匹配。那就是分类帐如何安装服务。我给了 landreg 作为名字。如果它在fabcar下，则照原样提供。

我自己学习，并已使用Fabric Node SDK成功安装了一个有效示例。我们可以通过Skype进行讨论。

谢谢，斯里拉姆

如何使node.js链码可用于在对等方中安装？

1 个答案: