Questions tagged [truffle-contract]
The truffle-contract tag has no usage guidance.
263
questions
0
votes
1answer
28 views
How to save the contract instance on a mapping in solidity?
I have created an EnergyExchange contract in my React app.js that it is deployed in the network.
Inside the EnergyExchange contract there is a function to create Agent contracts.
What I am trying to ...
0
votes
1answer
30 views
Solidity ^0.6.10 returnBalance() returns “VM Exception while processing transaction: invalid opcode”
I am using Ganache and Truffle console. I compile and migrate the following contract:
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.10;
contract EthReceiver {
address payable private owner;...
0
votes
0answers
16 views
Is there a way to get revert message by my client?
I have a smart contract with this simple function:
function addUser( string memory _username, string memory _nome, string memory _cognome, string memory _email) public isOwner() {
require(bytes(...
0
votes
1answer
47 views
Solidity Smart Contract withdrawal ETH with amount from contract address does not work
I have below smart contract and a test program to test transfer ETH out of contract address, but contract’s ETH balance not changed. I tested withdrawAmount(uint256 amount) but the assertion error ...
0
votes
1answer
22 views
Truffle Contract sendTransaction not immediately returning transaction hash
I am using Truffle Contract to call a Smart Contract method that writes to the ethereum blockchain. My web3 client is connected to my own Open Ethereum node. Below is the code (nodejs) that I am using ...
0
votes
0answers
5 views
MainNet Truffle Contract sendTransaction request not returning transaction receipt
I just deployed my smart contract to MainNet and starting to test my DAPP. I am running my own public Open Ethereum node where I send my transactions to. I am NOT mining in this node. From what I can ...
1
vote
2answers
39 views
Truffle migration deployment: Transaction was not mined within 50 blocks
I am running my own Ethereum client node (Open Ethereum 3.0.1). I am using Truffle migrate to deploy my smart contract to MainNet. However, the contract deployment is taking too long. The result from ...
0
votes
1answer
30 views
My contract is deployed but instance is undefined
I have deployed a contract on the ganache blockchain successfully using truffle.
In the truffle console, I can call the contract fine
truffle(development)> MyCoin
[Function: TruffleContract] {
...
0
votes
0answers
40 views
How to create an instance of the deployed contract in Truffle Console?
I am trying to learn Truffle tool using the tutorial at:
Truffle tutorial
I am writing the following command at Truffle console to create an instance of the deployed contract but I am getting the ...
0
votes
1answer
39 views
How to implement ether transfer from one EOA to another using a contract?
I am working on a private development network set up with geth with PoA consensus. Everything is working well from the geth console. I have written a Solidity contract to initiate some ether transfers ...
0
votes
0answers
30 views
Truffle stuck when deploy smart contract when using Ledger wallet
I have a little problem deploying smart contract with ledger nano s as provider on ropsten. The script just remain stuck at first migration
Starting migrations...
======================
> Network ...
1
vote
1answer
30 views
How to call an overloaded function in Truffle with ABIEncoderV2?
How do you call an overloaded function in Truffle when passing a struct using pragma experimental ABIEncoderV2;?
contract MyContract {
struct MyStruct {
address param1;
address param2;
...
0
votes
0answers
43 views
Why is the compiler unable to generate Contract ByteCode and ABI when I try to Verify & Publish my contract?
Another dev no longer connected to our project deployed this contract, and I'm trying to Verify & Publish it on Etherscan now.
What am I doing wrong?
I do know that the dev who built this used ...
0
votes
1answer
33 views
Error in smart contract solidity [closed]
Hello i have some problem when i compile my smart contract with truffle
i use the network of truffle develop
Truffle v5.1.14-nodeLTS.0 (core: 5.1.13)
Solidity - ^0.4.0 (solc-js)
Node v13.1.0
Web3....
0
votes
1answer
19 views
looking for a start in solidity [duplicate]
I am totally new to the Solidity Programing. I was working on NodeJS, express and mongoDB. Few days ago I started working on blockchain. I have to write the API'S for contracts. We are using truffle ...
0
votes
1answer
24 views
When i call a function: Error: Returned error: VM Exception while processing transaction: invalid opcode
I work on Truffle. My contract is A and its function is infoRep(). infoRep() returns some data. Whenever i call the function in Truffle console the below error occurs:
Error: Returned error: VM ...
0
votes
1answer
49 views
How to act as another wallet when using Truffle exec scripts?
I am writing a seed to add data on the smart contract after I deploy it.
I'm using ropsten network, setted up like this in truffle-config:
ropsten: {
provider: function () {
return new ...
0
votes
1answer
29 views
Why my contract binary does not set?
My project is in Truffle. I programmed a smart contract and want to deploy it with JavaScript. But the following error occurs:
Error: Contract error: contract binary not set. Can't deploy new ...
0
votes
0answers
46 views
Install py-solc-x using python, there is an error
I am using python to install py-solc-x, but there is an error during installation：
[root@localhost ~]# python3 -m solcx.install v0.4.25
ERROR: Unknown option --version
/usr/local/python3/lib/python3....
0
votes
1answer
29 views
Im getting the following error: ParserError: Expected primary expression. struct ManagingOrder.Parking memory new_Parking = Parking({
Im using blockchain technology for the first time, for a college project.
Im trying to run a smart contract from Github.
After debugging the errors shown while compiling the smart contract (in ...
0
votes
1answer
46 views
Solidity test fails when testing onlyOwner functions
I have a contract where some functions can be called only by the owner of the contract and I want to test it with a solidity test in truffle. The contract looks like this:
contract owned {
...
0
votes
1answer
60 views
Error when deploying contract in geth with truffle ? --> Returned values aren't valid, did it run Out of Gas?
I have deployed a contract in a geth private network by using truffle. I can send transaction via my UI in html / nodejs but i am not able to do a call to retrieve informations. If I do, nothing ...
0
votes
2answers
30 views
How to prevent someone to replace our smart contract
I'm still learning to develop dApp and currently, I conduct some testing on my dApp.
I found out that someone who is part of the blockchain network (miner and node) can replace our deployed smart ...
1
vote
3answers
63 views
Deploy smart contract with Node-js
I want to deploy a smart contract with Node-js. I followed this guide but an error occurs where i effort instantiate my smart contract.
app.js:
var Web3=require('web3');
var fs=require('fs');
var ...
0
votes
1answer
23 views
How do i keep a contract's value changed by another one constant?
There are 3 contracts; A, B, and C. C has a state variable that initialized null. A changes that state variable to Yerevan. After that, B sees that variable. Evaluating by A is successfull but B sees ...
0
votes
1answer
27 views
How to use older version of Solidity in Truffle suite
I've tried to migrate contract on an older version of solidity, I have modified the config.js to be as in the following
and the smart contract solidity code I'm trying to deploy as follows
The ...
0
votes
1answer
202 views
Calling function from existing truffle contract in node.js
This is probably a very simple problem to solve, but I am setting up a node.js backend using express for my Dapp and I can now deploy new contracts just fine.
I now need to figure out how to make ...
1
vote
1answer
34 views
Fire transaction from contract
I have a contract holding a mapping like this: mapping (address => User) users. How can I get the contract to automatically fire a transaction/event when a certain condition is met? For example, ...
0
votes
0answers
41 views
Truffle - set or disable optimizer only for selected contracts
I have over 40 contracts in my project, for example:
admin groups
votings
registry
token
In my truffle config I have optimizer enabled with 600 runs.
compilers: {
solc: {
version: "0.5....
0
votes
0answers
35 views
No response from live networks except ganache when interacting with truffle-contract
I am developing a Web3 app for a private Ethereum network. Throughout the development I used ganache-cli and now I wanted to test in the private live network. I can successfully interact with the ...
1
vote
2answers
181 views
Truffle Error: ContractName has no network configuration for its current network id (1575203139857)
Im doing the tutorial at https://github.com/ConsenSys-Academy/proof-of-existence-exercise and running into the following error:
$ truffle console
truffle(development)> var poe = await ...
0
votes
0answers
45 views
How to build a P2P wager contract with Solidity
I am looking to build a contract with Solidity that will take wagers on a football game between a bunch of friends. Each user should be able to place a bet on either team, with each bet to be added to ...
1
vote
1answer
278 views
Pass arrays to solidity's function from truffle
I am getting ALERT: Transaction Error. Exception thrown in contract code in metamask when calling addBet function from truffle. The function works without any errors when called from remix. The ...
0
votes
0answers
32 views
Can't migrate, ropsten randomly throws out of gas
I have the following migration files with 50 contracts' deployment and their setup (calling each other functions like privileges, access and so on):
On the development network everything works fine. ...
0
votes
1answer
743 views
Error: Truffle is currently using solc 0.5.8,
i run migrate in the terminalbut it shows
Error: Truffle is currently using solc 0.5.8, but one or more of your contracts specify "pragma solidity ^0.4.27".
Please update your truffle config or ...
0
votes
1answer
176 views
Cannot Find Module Error for Truffle-contract
Error:-
Uncaught Error: Cannot find module './truffle-contract.min.js'
at c (web3.min.js:1)
at c (web3.min.js:1)
at index.html:27
<!DOCTYPE html>
<html lang="en">
<head&...
0
votes
1answer
21 views
How to get an instance for a previously migrated contract with truffle?
Scenario:
Token contract migration file
Dapp contract migration file
I want to interact with the already deployed token contract in the dapp contract migration file.
0
votes
0answers
62 views
Can I use a truffle-contract instance in the data field of web3.eth.sendSignedTransaction?
I use truffle-contract for contract abstraction.
const myContract = TruffleContract(MyContractArtifact);
myContract.setProvider(web3.currentProvider);
I'm using Infura as the web3 provider so need ...
0
votes
1answer
724 views
error: VM Exception while processing transaction: revert SafeMath: subtraction overflow on migrating crowdsale conract
I am developing the token sale Dapp using openzepplin-solidity version 2.3.
While migrating, I got the following error.
Returned error: VM Exception while processing transaction: revert SafeMath:...
0
votes
1answer
146 views
How to use function modifier to control contract function access right?
I deployed a ERC20Mintable token in truffle environment(the source file is ERC20Mintable.sol).
The mint function is declared with onlyMinter modifer:
contract ERC20Mintable is ERC20, MinterRole {
...
0
votes
1answer
170 views
Contract function call error “TypeError: Cannot read property 'isMinter' of undefined” using Truffle tool
I deployed a ERC20Mintable token in truffle env(the .sol file is ERC20Mintable.sol).
2_mintable.js
=============
Deploying 'ERC20Mintable'
-------------------------
> transaction hash: ...
1
vote
1answer
21 views
Doubt regarding gas cost
Consider im having to deal with 3 uint8 values each of which are to be stored for each user.
Is the gas cost the same if i use 3 different arrays or if i use a structure array which contains the 3 ...
0
votes
0answers
277 views
Hoiw to convert string to address with web3
I am getting address value with html input as string value how do we convert the string to address for parsing with truffle-contract.
Here's the method I am using:
registerAirline : async() => {...
0
votes
1answer
364 views
Why Could not find artifacts for contract from any sources
I am using windows 10 with truffle and ganache-cli. I have 2 contracts file to be deployed contain interfaces of other contracts defined within the contract:
Contracts:
ERC721Mintable.sol
Ownable
...
1
vote
0answers
103 views
Contract has no network id set, cannot lookup artifact data
I am using web3 v1.0.0-beta.37 and truffle contract for server.js configuration. I have defined two contracts FlightSuretyData.sol and FlightSuretyApp.sol FlightSuretyApp contract access functions ...
3
votes
3answers
379 views
How do I determine the network within a truffle exec script?
I'm writing a script to be executed with truffle exec and I need to add some logic conditional on the network we're calling truffle exec with.
This is (roughly) what I want in my script:
const ...
0
votes
0answers
140 views
Invalid number of arguments in Solidity function
Why am I getting Uncaught (in promise) Error: Invalid number of arguments to Solidity function
sol file:
uint id = 1;
struct Multihash {
bytes32 digest;
uint8 hashFunction;
...
0
votes
1answer
377 views
async handleSubmit(event) not working
This is the full code of App.js
import SimpleStorageContract from "./contracts/SimpleStorage.json";
import getWeb3 from "./utils/getWeb3";
import "./App.css";
class App extends Component {
state =...
1
vote
1answer
103 views
ParserError: Expected token Semicolon
I got this particular Parser error and can you help me how to fix this issue:while using this code
pragma solidity ^0.4.17;
import "../node_modules/zeppelin-solidity/contracts/token/ERC20/...
1
vote
1answer
54 views
During gas-free transaction get an error “No relay responded! 4 attempted, 4 pinged”
I did all modification related to this instruction https://github.com/tabookey/tabookey-gasless
However, when I'm trying to write some tests
it fails and provides me the following error
Error:...
