Unable to access my contract function with web3.eth.contract - javascript

//Contract build .json to js obj
import { abi } from './contract.js'
//Init web3
import { getWeb3 } from './getWeb3'
// Import are working fine.
export const getTokenContract = () => (
new Promise((resolve, reject) => {
getWeb3.then(web3 => { //Get web3
var contract = web3.eth.contract(abi) //Instance contract with json abi
var instance = contract.at("0x918daf9d0bd5c927ca8f1c5776e7c0c200be0fc23994dbe34dd9c9669c6a900d") //Get adress of the contract
console.log(contract)
resolve(instance)
})
})
)
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.1/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.1/react-dom.min.js"></script>
I try to access my smart contract functions inside the instance. While I console.log, the function present in the abi are correctly display.
No functions is avalaible from the adress.
For exemple:
instance.getFidelity...
getFidelity isn't defined so crash.
testrpc launched.
truffle compile
truffle migrate (success deployed at 0x918...)
Abi json:
// Token Interface
export const Token = [
{
"contractName": "MetaCoin",
"abi": [
{
"constant": false,
"inputs": [
{
"name": "addr",
"type": "address"
}
],
"name": "getFidelity",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "owner",
"outputs": [
{
"name": "",
"type": "address"
}
],
"payable": false,
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "receiver",
"type": "address"
},
{
"name": "amount",
"type": "uint256"
}
],
"name": "sendCoin",
"outputs": [
{
"name": "sufficient",
"type": "bool"
}
],
"payable": false,
"type": "function"
},
{
"constant": false,
"inputs": [],
"name": "redeemFidelity",
"outputs": [
{
"name": "sufficient",
"type": "bool"
}
],
"payable": false,
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "newOwner",
"type": "address"
}
],
"name": "transferOwnership",
"outputs": [],
"payable": false,
"type": "function"
},
{
"constant": false,
"inputs": [
{
"name": "addr",
"type": "address"
}
],
"name": "getBalance",
"outputs": [
{
"name": "",
"type": "uint256"
}
],
"payable": false,
"type": "function"
},
{
"inputs": [],
"payable": false,
"type": "constructor"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"name": "_from",
"type": "address"
},
{
"indexed": true,
"name": "_to",
"type": "address"
},
{
"indexed": false,
"name": "_value",
"type": "uint256"
}
],
"name": "Transfer",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"name": "_from",
"type": "address"
}
],
"name": "Fidelity",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"name": "previousOwner",
"type": "address"
},
{
"indexed": true,
"name": "newOwner",
"type": "address"
}
],
"name": "OwnershipTransferred",
"type": "event"
}
]
}
];
ERC20 Smart Contract
pragma solidity ^0.4.4;
import "./Ownable.sol";
contract MetaCoin is Ownable {
mapping (address => uint) balances;
mapping (address => uint) fidelity;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Fidelity(address indexed _from);
function MetaCoin() {
balances[tx.origin] = 10000;
fidelity[tx.origin] = 100;
}
function sendCoin(address receiver, uint amount) returns(bool sufficient) {
if (balances[msg.sender] < amount) return false;
balances[msg.sender] -= amount;
balances[receiver] += amount;
if (receiver == owner && amount > 10) {
fidelity[msg.sender] += 1;
}
Transfer(msg.sender, receiver, amount);
return true;
}
function redeemFidelity() returns (bool sufficient) {
if (fidelity[msg.sender] < 10) return false;
fidelity[msg.sender] -= 10;
Fidelity(msg.sender);
return true;
}
function getBalance(address addr) returns(uint) {
return balances[addr];
}
function getFidelity(address addr) returns(uint) {
return fidelity[addr];
}
}

Related

Interact with solidity contract using JavaScript

I started working on a simple project and I don't have much experience in blockchain. I want to connect to a Solidity contract using JavaScript. Connecting with the contract and getting the address works, but when i'm calling getInfo I'm getting this error:
Uncaught (in promise) Error: Returned values aren't valid, did it run Out of Gas?
You might also see this error if you are not using the correct ABI for the contract you are
retrieving data from, requesting data from a block number that does not exist,
or querying a node which is not fully synced.
Below is the code.
The contract:
pragma solidity ^0.8.0;
contract NFT {
uint256 id;
string name;
string description;
address owner;
constructor(uint256 _id, string memory _name, string memory _description) public {
id = _id;
name = _name;
description = _description;
owner = msg.sender;
}
function transfer(address newOwner) public {
require(msg.sender == owner, "Only the owner can transfer the NFT");
owner = newOwner;
}
function getInfo() public view returns (uint256, string memory, string memory, address) {
return (id, name, description, owner);
}
function getAddress() external view returns(address) {
return address(this);
}
}
And the JavaScript code:
const connectContract = async () => {
const contractAbi = [
{
"inputs": [
{
"internalType": "address",
"name": "newOwner",
"type": "address"
}
],
"name": "transfer",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "_id",
"type": "uint256"
},
{
"internalType": "string",
"name": "_name",
"type": "string"
},
{
"internalType": "string",
"name": "_description",
"type": "string"
}
],
"stateMutability": "nonpayable",
"type": "constructor"
},
{
"inputs": [],
"name": "getAddress",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "getInfo",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
},
{
"internalType": "string",
"name": "",
"type": "string"
},
{
"internalType": "string",
"name": "",
"type": "string"
},
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
}
]; // the ABI of the NFT contract
const contractAddress =[contract address]; // the address of the deployed NFT contract
window.web3 = await new Web3(window.ethereum);
window.contract = await new window.web3.eth.Contract(contractAbi, contractAddress);
document.getElementById("contractArea").innerHTML = "Connected to Contract";
web3.eth.getAccounts(console.log);
}
const getInfo = async () => {
const info = await contract.methods.getInfo().call().then(console.log);
}
async function main() {
const contract = new web3.eth.Contract(contractAbi, contractAddress);
// Transfer the NFT to a new owner
const newOwner = [owner];
const receipt = await contract.methods.transfer(newOwner).send({ from: web3.eth.defaultAccount });
console.log(receipt);
}
Is this the correct way to connect with a smart contract? What am I missing?

Get ERC20 Token balance returns Cannot read properties of undefined (reading 'balanceOf')

I am trying to get the balance of tokens on a specified wallet address but i keep getting the error Cannot read properties of undefined (reading 'balanceOf') I have done several searches and cant seem to find what's wrong with my code as seen below
async function getBalanceofToken() {
const tokenAbi = [
{
"constant": false,
"inputs": [
{
"name": "_to",
"type": "address"
},
{
"name": "_value",
"type": "uint256"
}
],
"name": "transfer",
"outputs": [
{
"name": "",
"type": "bool"
}
],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [
{
"name": "_owner",
"type": "address"
}
],
"name": "balanceOf",
"outputs": [
{
"name": "balance",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
},
];
const web3 = new Web3('https://mainnet.infura.io/v3/XXXXXXXXXX');
const tokenAddress = '0x467bccd9d29f223bce8043b84e8c8b282827790f';
const WalletAddress = '0x3be417a3cf3381e979093c79f2ed4aec3545fa55';
const contract = web3.eth.contract(tokenAbi, tokenAddress);
try {
const WalletTokenBalance = await contract.methods.balanceOf(WalletAddress).call(function(err, res) {
if (err) {
console.log("An error occured", err);
return
}
console.log("The balance is: ",res)
})
var decimals = await contract.methods.decimals().call();
var adjustedBalance = WalletTokenBalance * 10 ** -decimals;
console.log(adjustedBalance);
}
catch (err) {
document.getElementById("outputerr").innerHTML = err;
}
}
I am currently using this version of web3.js https://unpkg.com/#metamask/legacy-web3#latest/dist/metamask.web3.min.js
Please what am i doing wrong and how do i fix this?
Regards.

Remote method in LoopBack not being called

When calling a remote method in my LoopBack project, it seems to only return an empty array. I don't think it is really being called at all but perhaps the default implementation is being called.
member.js
module.exports = function(Member) {
Member.getProjectsForMember = function(id, callback) {
console.error('HERE');
return callback(null, {'test': '123'});
};
};
member.json
{
"name": "member",
"base": "User",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"name": {
"type": "string",
"required": true
}
},
"validations": [],
"relations": {
"projects": {
"type": "hasMany",
"model": "project",
"options": {
"nestRemoting": false
}
}
},
"acls": [{
"accessType": "*",
"principalType": "ROLE",
"principalId": "$authenticated",
"permission": "ALLOW"
},
{
"accessType": "*",
"principalType": "ROLE",
"principalId": "$unauthenticated",
"permission": "DENY"
}
],
"methods": {
"getProjectsForMember": {
"accepts": [{
"arg": "id",
"type": "number",
"required": true,
"http": {
"source": "path"
}
}],
"returns": [{
"arg": "projects",
"type": "Object",
"root": true,
}],
"http": [{
"path": "/:id/projects",
"verb": "get"
}]
}
}
}
I am calling it using the LoopBack API Explorer via a GET to /members/{id}/projects:
http://localhost:3000/api/members/3e26u0aa62155715vcb52afa/projects?access_token=R6GKVHwFuMG2caJexuyoMd0JSNOWtvLVXIEmRj1IkNSrM54bwomQLxHcpqlyFaHk
The response is []. I would expect to see the response of {'test': '123'} and the 'HERE' logged to the terminal but I do not.

Need to get Name, Node Name and Phase Values from API

I am trying to get Name, Node Name and Phase values from JSON Data using JavaScript. Here is my JavaScript
<script>
$(document).ready(function () {
$.getJSON('http://ec2-3-82-117-70.compute-1.amazonaws.com:8080/api/v0/retrievePodStatus/default',
function (data) {
console.log(data)
document.body.append("Name: " + data.items[1].metadata.name);
// document.body.append(data.items[1].metadata.name);
// document.body.append(data.items[0].spec.nodeName);
});
});
</script>
I am just getting the name in here. Can someone please help me how to get Name, Node Name and Phase Values? find the below JSON as well.
"apiVersion": "v1",
"items": [
{
"apiVersion": "v1",
"kind": "Pod",
"metadata": {
"annotations": {
"kubernetes.io/limit-ranger": "LimitRanger plugin set: cpu request for container external-dns"
},
"creationTimestamp": "2019-02-28T16:22:49Z",
"generateName": "external-dns-5d69b66646-",
"labels": {
"app": "external-dns",
"pod-template-hash": "1825622202"
},
"name": "external-dns-5d69b66646-pmxmd",
"namespace": "default",
"ownerReferences": [
{
"apiVersion": "extensions/v1beta1",
"blockOwnerDeletion": true,
"controller": true,
"kind": "ReplicaSet",
"name": "external-dns-5d69b66646",
"uid": "170d9260-3b75-11e9-abe2-0ec5819342ce"
}
],
"resourceVersion": "2984",
"selfLink": "/api/v1/namespaces/default/pods/external-dns-5d69b66646-pmxmd",
"uid": "170e1a0d-3b75-11e9-abe2-0ec5819342ce"
},
"spec": {
"containers": [
{
"args": [
"--source=service",
"--source=ingress",
"--provider=aws",
"--registry=txt",
"--txt-owner-id=qpair"
],
"image": "registry.opensource.zalan.do/teapot/external-dns:v0.4.2",
"imagePullPolicy": "IfNotPresent",
"name": "external-dns",
"resources": {
"requests": {
"cpu": "100m"
}
},
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File",
"volumeMounts": [
{
"mountPath": "/var/run/secrets/kubernetes.io/serviceaccount",
"name": "default-token-rr546",
"readOnly": true
}
]
}
],
"dnsPolicy": "ClusterFirst",
"nodeName": "ip-172-20-39-147.ec2.internal",
"restartPolicy": "Always",
"schedulerName": "default-scheduler",
"securityContext": {},
"serviceAccount": "default",
"serviceAccountName": "default",
"terminationGracePeriodSeconds": 30,
"tolerations": [
{
"effect": "NoExecute",
"key": "node.kubernetes.io/not-ready",
"operator": "Exists",
"tolerationSeconds": 300
},
{
"effect": "NoExecute",
"key": "node.kubernetes.io/unreachable",
"operator": "Exists",
"tolerationSeconds": 300
}
],
"volumes": [
{
"name": "default-token-rr546",
"secret": {
"defaultMode": 420,
"secretName": "default-token-rr546"
}
}
]
},
"status": {
"conditions": [
{
"lastProbeTime": null,
"lastTransitionTime": "2019-02-28T16:22:49Z",
"status": "True",
"type": "Initialized"
},
{
"lastProbeTime": null,
"lastTransitionTime": "2019-02-28T16:22:58Z",
"status": "True",
"type": "Ready"
},
{
"lastProbeTime": null,
"lastTransitionTime": "2019-02-28T16:22:49Z",
"status": "True",
"type": "PodScheduled"
}
],
"containerStatuses": [
{
"containerID": "docker://18b96317cf360d562fb3f849c6716c50a41a67a4dbc126164020531e1e4d84a9",
"image": "registry.opensource.zalan.do/teapot/external-dns:v0.4.2",
"imageID": "docker-pullable://registry.opensource.zalan.do/teapot/external-dns#sha256:d54b9eb8948b87eb7fcd938990ff2dbc9ca0a42d9c5d36fcaa75c7cf066f7995",
"lastState": {},
"name": "external-dns",
"ready": true,
"restartCount": 0,
"state": {
"running": {
"startedAt": "2019-02-28T16:22:57Z"
}
}
}
],
"hostIP": "172.20.39.147",
"phase": "Running",
"podIP": "100.96.7.3",
"qosClass": "Burstable",
"startTime": "2019-02-28T16:22:49Z"
}
},
I am just getting the name in here. Can someone please help me how to get Name, Node Name and Phase Values? find the below JSON as well.
Thanks, Much Appreciated

You were close with the code you posted. You just needed items[0] instead of items[1]. Remember the first element of an array is always 0. Other than that its as easy as checking the open and close brackets [] or {} to see where each nested object/array starts and ends.
Code:
var name = data.items[0].metadata.name
var nodeName = data.items[0].spec.nodeName
var phase = data.items[0].status.phase
snippet:
var data = {
"apiVersion": "v1",
"items": [{
"apiVersion": "v1",
"kind": "Pod",
"metadata": {
"annotations": {
"kubernetes.io/limit-ranger": "LimitRanger plugin set: cpu request for container external-dns"
},
"creationTimestamp": "2019-02-28T16:22:49Z",
"generateName": "external-dns-5d69b66646-",
"labels": {
"app": "external-dns",
"pod-template-hash": "1825622202"
},
"name": "external-dns-5d69b66646-pmxmd",
"namespace": "default",
"ownerReferences": [{
"apiVersion": "extensions/v1beta1",
"blockOwnerDeletion": true,
"controller": true,
"kind": "ReplicaSet",
"name": "external-dns-5d69b66646",
"uid": "170d9260-3b75-11e9-abe2-0ec5819342ce"
}],
"resourceVersion": "2984",
"selfLink": "/api/v1/namespaces/default/pods/external-dns-5d69b66646-pmxmd",
"uid": "170e1a0d-3b75-11e9-abe2-0ec5819342ce"
},
"spec": {
"containers": [{
"args": [
"--source=service",
"--source=ingress",
"--provider=aws",
"--registry=txt",
"--txt-owner-id=qpair"
],
"image": "registry.opensource.zalan.do/teapot/external-dns:v0.4.2",
"imagePullPolicy": "IfNotPresent",
"name": "external-dns",
"resources": {
"requests": {
"cpu": "100m"
}
},
"terminationMessagePath": "/dev/termination-log",
"terminationMessagePolicy": "File",
"volumeMounts": [{
"mountPath": "/var/run/secrets/kubernetes.io/serviceaccount",
"name": "default-token-rr546",
"readOnly": true
}]
}],
"dnsPolicy": "ClusterFirst",
"nodeName": "ip-172-20-39-147.ec2.internal",
"restartPolicy": "Always",
"schedulerName": "default-scheduler",
"securityContext": {},
"serviceAccount": "default",
"serviceAccountName": "default",
"terminationGracePeriodSeconds": 30,
"tolerations": [{
"effect": "NoExecute",
"key": "node.kubernetes.io/not-ready",
"operator": "Exists",
"tolerationSeconds": 300
},
{
"effect": "NoExecute",
"key": "node.kubernetes.io/unreachable",
"operator": "Exists",
"tolerationSeconds": 300
}
],
"volumes": [{
"name": "default-token-rr546",
"secret": {
"defaultMode": 420,
"secretName": "default-token-rr546"
}
}]
},
"status": {
"conditions": [{
"lastProbeTime": null,
"lastTransitionTime": "2019-02-28T16:22:49Z",
"status": "True",
"type": "Initialized"
},
{
"lastProbeTime": null,
"lastTransitionTime": "2019-02-28T16:22:58Z",
"status": "True",
"type": "Ready"
},
{
"lastProbeTime": null,
"lastTransitionTime": "2019-02-28T16:22:49Z",
"status": "True",
"type": "PodScheduled"
}
],
"containerStatuses": [{
"containerID": "docker://18b96317cf360d562fb3f849c6716c50a41a67a4dbc126164020531e1e4d84a9",
"image": "registry.opensource.zalan.do/teapot/external-dns:v0.4.2",
"imageID": "docker-pullable://registry.opensource.zalan.do/teapot/external-dns#sha256:d54b9eb8948b87eb7fcd938990ff2dbc9ca0a42d9c5d36fcaa75c7cf066f7995",
"lastState": {},
"name": "external-dns",
"ready": true,
"restartCount": 0,
"state": {
"running": {
"startedAt": "2019-02-28T16:22:57Z"
}
}
}],
"hostIP": "172.20.39.147",
"phase": "Running",
"podIP": "100.96.7.3",
"qosClass": "Burstable",
"startTime": "2019-02-28T16:22:49Z"
}
}],
}
var name = data.items[0].metadata.name
var nodeName = data.items[0].spec.nodeName
var phase = data.items[0].status.phase
console.log(name)
console.log(nodeName)
console.log(phase)

Loopback query with where inside include

I am trying to query my data the following way:
const filter = {where: {activity_id: activity_id, include: {relation: 'planGoal', scope: {where: {activity_goal_id: goal_id}}}}};
However this doesn't seem to work only the activity_id filter is applied and the wrong data is returned.
So my question is how do I query data within an include? and is it even possible?
For reference, here are the models in question:
{
"name": "plan_goal_has_action_option",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"id": {
"type": "number"
},
"activity_id": {
"type": "number"
},
"plan_has_goal_id": {
"type": "number"
},
"action_option": {
"type": "string"
}
},
"validations": [],
"relations": {
"planGoal": {
"type": "belongsTo",
"model": "plan_has_goal",
"foreignKey": "plan_has_goal_id"
}
},
"acls": [],
"methods": {}
}
{
"name": "plan_has_goal",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"id": {
"type": "number"
},
"activity_id": {
"type": "number"
},
"activity_goal_id": {
"type": "number"
}
},
"validations": [],
"relations": {
"goal": {
"type": "belongsTo",
"model": "activity_goal",
"foreignKey": "activity_goal_id"
},
"actions": {
"type": "hasMany",
"model": "plan_goal_has_action_option",
"foreignKey": "plan_has_goal_id"
}
},
"acls": [],
"methods": {}
}

include and where are two different filters:
{
where: {
activity_id: activity_id
},
include: {
relation: 'planGoal',
scope: {
where: {
activity_goal_id: goal_id
}
}
}
}

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