web3-eea/example/multiNodeExamplePrivateCall/storeValueFromNode2.js

EEA JSON-RPC API

const Web3 = require("web3");
const EEAClient = require("../../src");
const EventEmitterAbi = require("../solidity/EventEmitter/EventEmitter.json")
  .output.abi;

const { orion, besu } = require("../keys.js");

const storeValueFromNode2 = (address, value, privacyGroupId) => {
  const web3 = new EEAClient(new Web3(besu.node2.url), 2018);
  const contract = new web3.eth.Contract(EventEmitterAbi);

  // eslint-disable-next-line no-underscore-dangle
  const functionAbi = contract._jsonInterface.find(e => {
    return e.name === "store";
  });
  const functionArgs = web3.eth.abi
    .encodeParameters(functionAbi.inputs, [value])
    .slice(2);

  const functionCall = {
    to: address,
    data: functionAbi.signature + functionArgs,
    privateFrom: orion.node2.publicKey,
    privacyGroupId,
    privateKey: besu.node2.privateKey
  };
  return web3.eea
    .sendRawTransaction(functionCall)
    .then(transactionHash => {
      console.log("Transaction Hash:", transactionHash);
      return web3.priv.getTransactionReceipt(
        transactionHash,
        orion.node2.publicKey
      );
    })
    .then(result => {
      console.log("Event Emitted:", result.logs[0].data);
      return result;
    });
};

const getValue = (url, address, privacyGroupId) => {
  const web3 = new EEAClient(new Web3(url), 2018);
  const contract = new web3.eth.Contract(EventEmitterAbi);

  // eslint-disable-next-line no-underscore-dangle
  const functionAbi = contract._jsonInterface.find(e => {
    return e.name === "value";
  });

  const functionCall = {
    to: address,
    data: functionAbi.signature,
    privacyGroupId
  };

  return web3.priv.call(functionCall).then(result => {
    console.log(`Get Value from ${url}:`, result);
    return result;
  });
};

const getValueFromNode1 = (address, privacyGroupId) => {
  return getValue(besu.node1.url, address, privacyGroupId);
};

const getValueFromNode2 = (address, privacyGroupId) => {
  return getValue(besu.node2.url, address, privacyGroupId);
};

const getValueFromNode3 = (address, privacyGroupId) => {
  return getValue(besu.node3.url, address, privacyGroupId);
};

module.exports = {
  storeValueFromNode2,
  getValueFromNode1,
  getValueFromNode2,
  getValueFromNode3
};

if (require.main === module) {
  if (!process.env.CONTRACT_ADDRESS) {
    throw Error(
      "You need to export the following variable in your shell environment: CONTRACT_ADDRESS="
    );
  }

  if (!process.env.PRIVACY_GROUP_ID) {
    throw Error(
      "You need to export the following variable in your shell environment: PRIVACY_GROUP_ID="
    );
  }

  const address = process.env.CONTRACT_ADDRESS;
  const privacyGroupId = process.env.PRIVACY_GROUP_ID;
  storeValueFromNode2(address, 42, privacyGroupId)
    .then(() => {
      return getValueFromNode1(address, privacyGroupId);
    })
    .then(() => {
      return getValueFromNode2(address, privacyGroupId);
    })
    .then(() => {
      return getValueFromNode3(address, privacyGroupId);
    })
    .catch(console.log);
}