Questions tagged [truffle-contract]

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2answers
740 views

How to access Truffle deployed contracts with app's javascript code?

I have some smart contracts deployed with Truffle on the local Ganache network, but I don't know how to access it with the app's javascript in order to make function calls to the contract. How would I ...
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1answer
59 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 ...
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2answers
640 views

Out of gas when calling smart contract function from web3/Meteor Dapp

The following smart contract function works when called in the Remix-Solidity IDE and connected to testrpc. function submitAsset(string ownerName, string assetName, string assetDesc, string barcode, ...
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1answer
196 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&...
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0answers
12 views

SyntaxError when setting instance of deployed contract to token variable

I'm following this tutorial: https://www.youtube.com/watch?v=044h0ZI-fDI At 22:45, the following command is run: DappToken.deployed().then(function(i){token=i;}) In the video, after this command is ...
3
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3answers
694 views

writing tests in solidity for functions returning multiple values

I have a function that returns multiple values function getInfo(string id) returns(string x,string y){ bytes32 _id= strToBytes(id); return (infostruct[_id].x,infostruct[_id].y) ; } Now i want ...
0
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1answer
445 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 =...
0
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1answer
2k views

Truffle Error : VM Exception while processing transaction: revert

I am trying to call following function of smart contract from App.js: function addCandidate(bytes32 _name, bytes32 _party) public{ //require(msg.sender == votingAdmin); //if(msg.sender != ...
0
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1answer
48 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 ...
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1answer
2k views

*contract* has not been deployed to detected network (network/artifact mismatch)

I'm trying to launch my first DApp using truffle and testrpc. I keep running into the above error once the web page loads. I looked at the Truffle Contract json object and the networks value is empty (...
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2answers
151 views

Solidity: uint parameter not being set properly

Testing my contract locally with truffle. I have a function with the signature: function purchase(address buyer, address seller, bytes16 bookId, uint tokens) public onlyOwner returns(bool success) ...
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1answer
530 views

Pass address[] array to Truffle deployer (MultisigWallet)

I am trying to deploy the MultisigWallet contract on testrpc. However, I can't figure out how to provide the address[] _owners constructor parameter in the deployment command. I've tried several ...
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2answers
168 views

when to use MyContract.deployed()?

I was going through truffle-contract docs and came across this function MyContract.deployed() As mentioned in docs this function create an instance of contract abstraction(abi) representing the ...
0
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1answer
34 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
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1answer
79 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
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1answer
40 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] { ...
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2answers
523 views

truffle migrate --network ropsten issues

When i run truffle migrate --network ropsten i don't see the contract deployment but just Compiling your contracts... =========================== > Everything is up to date, there is nothing to ...
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1answer
36 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 ...
2
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1answer
77 views

How to process Smart Contracts payable functions in batch?

I am aware that metamask will enable effective security for processing via the web browser a payable function action to a smart contract. What happens in batch? I have an API service which then ...
1
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1answer
238 views

Truffle contract.deployed does not get the latest instance deployed

I am developing a back-end DApp using truffle and nodejs on a private network. My application call Contract.deployed() and print the address of the obtained Contract. When I call truffle migrate --...
1
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1answer
91 views

Deploying fails with different compile version

I'm trying to implement a simple card game. Actually, everything is working fine. Until I tried to move from 0.4.0 to 0.4.22. Any idea what is going wrong? Thanks a lot. And here the code: pragma ...
1
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1answer
462 views

UnimplementedFeatureError: Encoding type “struct BiddingContract.Bidder memory” not yet implemented

The code is broken with the new upgrade v0.5, using Truffle v5.0.1 (core: 5.0.1) struct Bidder { address bidders_address; uint productId; uint bidValue; } struct Product { uint ...
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1answer
39 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;...
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0answers
18 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(...
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14answers
31k views

How to upgrade solidity compiler in truffle

I couldn't find a way to upgrade a version of truffle solidity compiler. Also curious how to see that information for deployed contracts in truffle console
1
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3answers
603 views

How to transfer token to an address?

Im using truffle and openzeppelin for issuing my ERC20 token. I already can add and buying the token, but still cannot transfer the token to another. when i console.log the contract, it show me: and ...
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0answers
44 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 ...
1
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1answer
117 views

Unable to deploy contract on ropsten

Firstly I installed geth and it's running I created an account and verified keystore file in the location: ~/Library/ethereum/testnet/keystore Then I used: Web3.personal.newAccount('password') ...
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0answers
7 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 ...
0
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1answer
980 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 ...
2
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2answers
151 views

Truffle interaction with my smart contract getting Vm exception

pragma solidity ^0.4.23; contract Hotelbooking { event Transfer( address indexed _from, address indexed _to, uint256 _value ); mapping(address => uint256) public ...
1
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1answer
288 views

truffle-contract cannot deploy in node js

This is the error I get. internal/modules/cjs/loader.js:631 throw new ERR_INVALID_ARG_TYPE('id', 'string', id); ^ TypeError [ERR_INVALID_ARG_TYPE]: The "id" argument must be of ...
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2answers
74 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
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1answer
164 views

The contract code couldn't be stored, please check your gas amount while deploying contract

I'm trying to deploy 3 contract in 2_deploy_contract (I deploy all 3) but after the first is deployed I get the following error : The contract code couldn't be stored, please check your gas amount.
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1answer
42 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
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0answers
52 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
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1answer
132 views

passing defaultBlock “pending” param to a truffle-contract call

I need the pending balance of my contract. As far as I understand I could do it with web3: web3.eth.call(callObject [, defaultBlock] [, callback]) Can I pass defaultBlock to truffle-contract ...
0
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1answer
37 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....
1
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1answer
40 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; ...
2
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3answers
1k views

how to call contract method using sendRawTransaction

const privateKeyStr = ""; const privateKey = new Buffer(privateKeyStr, 'hex'); const contractAddress = '0x'; const COO = '0x'; let contractAddress = '0x'; let myContract = ...; //some other articles ...
0
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0answers
61 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
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1answer
220 views

two issue about install web3.js through and invoke web3.eth.methods

First, I install type to the code like npm install web3 in the terminal while the first issue occurs (Environment1).Second, I change the version of node 、npm (like Envirnment 1=> Environment2) and ...
0
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2answers
419 views

How to detect what instruction caused “truffle test” to result in “invalid opcode” error?

I wrote a test for my contract and it returns invalid opcode as a result. Full output: 1) Contract: FPCoin1 One can purchase tokens for ether: Error: VM Exception while processing transaction: ...
3
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1answer
469 views

Pending transactions are not mined

Preconditions I'm running a private network with Geth, having custom smart contracts deployed by Truffle and a simple frontend which using Metamask as a provider to connect the network. Versions ...
0
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1answer
53 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
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1answer
62 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
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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
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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 ...
1
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3answers
76 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
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1answer
37 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 ...

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