I am trying to deploy a smart contract and interact with it. I am just using the codes given in the document.
For example, this is the smart contract:
pragma solidity >=0.7.0;
contract SimpleStorage {
uint public storedData;
event stored(address _to, uint _amount);
constructor(uint initVal) public {
emit stored(msg.sender, initVal);
storedData = initVal;
}
function set(uint x) public {
emit stored(msg.sender, x);
storedData = x;
}
function get() view public returns (uint retVal) {
return storedData;
}
}
I have compiled it with the compile.js and it is working fine.
Now I also have included the public_tx.js file to interact with the smart contract.
It is as follows:
const path = require("path");
const fs = require("fs-extra");
const Web3 = require("web3");
// member1 details
const { tessera, besu } = require("./keys.js");
const host = besu.member1.url;
const accountAddress = besu.member1.accountAddress;
// abi and bytecode generated from simplestorage.sol:
// > solcjs --bin --abi simplestorage.sol
const contractJsonPath = path.resolve(
"./",
"SimpleStorage.json"
);
const contractJson = JSON.parse(fs.readFileSync(contractJsonPath));
const contractAbi = contractJson.abi;
const contractBytecode = contractJson.evm.bytecode.object;
async function getValueAtAddress(
host,
deployedContractAbi,
deployedContractAddress
) {
const web3 = new Web3(host);
const contractInstance = new web3.eth.Contract(
deployedContractAbi,
deployedContractAddress
);
const res = await contractInstance.methods.get().call();
console.log("Obtained value at deployed contract is: " + res);
return res;
}
async function getAllPastEvents(
host,
deployedContractAbi,
deployedContractAddress
) {
const web3 = new Web3(host);
const contractInstance = new web3.eth.Contract(
deployedContractAbi,
deployedContractAddress
);
const res = await contractInstance.getPastEvents("allEvents", {
fromBlock: 0,
toBlock: "latest",
});
const amounts = res.map((x) => {
return x.returnValues._amount;
});
console.log(
"Obtained all value events from deployed contract : [" + amounts + "]"
);
return res;
}
// You need to use the accountAddress details provided to Quorum to send/interact with contracts
async function setValueAtAddress(
host,
accountAddress,
value,
deployedContractAbi,
deployedContractAddress
) {
const web3 = new Web3(host);
const account = web3.eth.accounts.create();
// console.log(account);
const contract = new web3.eth.Contract(deployedContractAbi);
// eslint-disable-next-line no-underscore-dangle
const functionAbi = contract._jsonInterface.find((e) => {
return e.name === "set";
});
const functionArgs = web3.eth.abi
.encodeParameters(functionAbi.inputs, [value])
.slice(2);
const functionParams = {
to: deployedContractAddress,
data: functionAbi.signature + functionArgs,
gas: "0x2CA51", //max number of gas units the tx is allowed to use
};
const signedTx = await web3.eth.accounts.signTransaction(
functionParams,
account.privateKey
);
console.log("sending the txn");
const txReceipt = await web3.eth.sendSignedTransaction(
signedTx.rawTransaction
);
console.log("tx transactionHash: " + txReceipt.transactionHash);
console.log("tx contractAddress: " + txReceipt.contractAddress);
return txReceipt;
}
async function createContract(host) {
const web3 = new Web3(host);
// make an account and sign the transaction with the account's private key; you can alternatively use an exsiting account
const account = web3.eth.accounts.create();
console.log(account);
// initialize the default constructor with a value `47 = 0x2F`; this value is appended to the bytecode
const contractConstructorInit = web3.eth.abi
.encodeParameter("uint256", "47")
.slice(2);
const txn = {
chainId: 1337,
nonce: await web3.eth.getTransactionCount(account.address), // 0x00 because this is a new account
from: account.address,
to: null, //public tx
value: "0x00",
data: "0x" + contractBytecode + contractConstructorInit,
gasPrice: "0x0", //ETH per unit of gas
gas: "0x2CA51", //max number of gas units the tx is allowed to use
};
console.log("create and sign the txn");
const signedTx = await web3.eth.accounts.signTransaction(
txn,
account.privateKey
);
console.log("sending the txn");
const txReceipt = await web3.eth.sendSignedTransaction(
signedTx.rawTransaction
);
console.log("tx transactionHash: " + txReceipt.transactionHash);
console.log("tx contractAddress: " + txReceipt.contractAddress);
return txReceipt;
}
async function main() {
createContract(host)
.then(async function (tx) {
console.log("Contract deployed at address: " + tx.contractAddress);
console.log(
"Use the smart contracts 'get' function to read the contract's constructor initialized value .. "
);
await getValueAtAddress(host, contractAbi, tx.contractAddress);
console.log(
"Use the smart contracts 'set' function to update that value to 123 .. "
);
await setValueAtAddress(
host,
accountAddress,
123,
contractAbi,
tx.contractAddress
);
console.log("Verify the updated value that was set .. ");
await getValueAtAddress(host, contractAbi, tx.contractAddress);
await getAllPastEvents(host, contractAbi, tx.contractAddress);
})
.catch(console.error);
}
if (require.main === module) {
main();
}
module.exports = exports = main;
But when I run it with node I am getting this error:
{
address: '0xDB19Bf60Deb085B46321963eFc3250f895bd2878',
privateKey: '0x753add01f8dfa39a3212793d54185fda2d2833d84a95962bcc00444f1acd7570',
signTransaction: [Function: signTransaction],
sign: [Function: sign],
encrypt: [Function: encrypt]
}
Error: Invalid JSON RPC response: ""
at Object.InvalidResponse (/home/zake/quorum-test-network/smart_contracts/privacy/node_modules/web3-core-helpers/lib/errors.js:43:16)
at XMLHttpRequest.request.onreadystatechange (/home/zake/quorum-test-network/smart_contracts/privacy/node_modules/web3-providers-http/lib/index.js:95:32)
at XMLHttpRequestEventTarget.dispatchEvent (/home/zake/quorum-test-network/smart_contracts/privacy/node_modules/xhr2-cookies/dist/xml-http-request-event-target.js:34:22)
at XMLHttpRequest._setReadyState (/home/zake/quorum-test-network/smart_contracts/privacy/node_modules/xhr2-cookies/dist/xml-http-request.js:208:14)
at XMLHttpRequest._onHttpRequestError (/home/zake/quorum-test-network/smart_contracts/privacy/node_modules/xhr2-cookies/dist/xml-http-request.js:349:14)
at ClientRequest.<anonymous> (/home/zake/quorum-test-network/smart_contracts/privacy/node_modules/xhr2-cookies/dist/xml-http-request.js:252:61)
at ClientRequest.emit (node:events:390:28)
at Socket.socketErrorListener (node:_http_client:447:9)
at Socket.emit (node:events:390:28)
at emitErrorNT (node:internal/streams/destroy:157:8)
at emitErrorCloseNT (node:internal/streams/destroy:122:3)
at processTicksAndRejections (node:internal/process/task_queues:83:21)
Am I missing something?
