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Questions tagged [truffle-contract]

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0
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1answer
21 views

Truffle test failing

i am learning solidity contracts and ethereum dapps. I have created a smart contract for creating a ERC20 token on using truffle dev environment. pragma solidity ^0.5.0; contract LearnTokens { ...
0
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0answers
21 views

cannot retrieve token price

i am trying to code a decentralized application and what i am trying to do right now is to get the token price of 1000000000000000 and display it. but when i try to get token price i keep getting 0. ...
0
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0answers
50 views

How to call contract method from specific address and private key without Metamask check

Good morning, I need to known how call contract method in javascript from specific address(and relative private key) without the check of Metamask. I explain better. This is an example of js code, ...
2
votes
1answer
42 views

Cannot deploy contract on private network with truffle: gas required exceeds allowance or always failing transaction

I'm writing a contract based on the ring mixer contract from here https://ropsten.etherscan.io/address/0x5e10d764314040b04ac7d96610b9851c8bc02815 I've tested it with ganache. Everything worked fine ...
0
votes
2answers
67 views

solidity code compilation error?

pragma solidity ^0.5.0; contract Ballot { struct Voter { uint weight; bool voted; uint8 vote; // address delegate; } //modifer modifier onlyOwner () {...
1
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1answer
40 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 ...
0
votes
1answer
37 views

truffle-contract: Contract has not been deployed to detected network (network/artifact mismatch)

I am running a private network and would like to use truffle-contract to interact with the contracts. Unfortunately it gives me this error: Error: Contract has not been deployed to detected network (...
0
votes
1answer
82 views

truffle-contract error: Number can only safely store up to 53 bits

I am using truffle-contract with a local quorum node and try to execute a smart contract method, but getting this error: Error: Number can only safely store up to 53 bits That's the way I do it: ...
0
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1answer
34 views

How does truffle get the address of the contract only by it's name?

When executing the command truffle(develop)> let instance = await MetaCoin.deployed() How does truffle get the address of the contract that is deployed ?
0
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1answer
34 views

How to change the account that is interacting with the deployed smart contract on Ganache? [duplicate]

When I enter truffle console and start interacting with the deployed contract truffle uses the first address, how to change the address for testing ? user@user:~/workspace/smart-contract$ truffle ...
0
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0answers
29 views

Truffle-contract cannot find module 'debug'

I'm trying to connect my smart contracts to a frontend app using web3 and the truffle-contract node package. In my client-side javascript file, I am requiring the package as follows: import contract ...
0
votes
1answer
22 views

Unable to use call.value to send the ether to another contract

Block Builder! I create a bank and client contracts, in order to reproduce DAO attack event. The client can deposit, but can not withdraw. I enclose the repo from Github here: https://github.com/...
0
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0answers
16 views

Struct Mapping: DeclarationError: Identifier not found or not unique for

Using openzepplin version 2.0.0 and solc version 0.5. I am writing an ERC721 token contract on truffle. Truffle compiles with no error on solc 0.4.23. I had to upgrade to 0.5 due to openzepplin ...
1
vote
1answer
29 views

Scope in events in web3 1.0 [closed]

Inside the callback of an event, how do I get the scope outside the function? Specifically, in the following scenario, I want the web3 object: (using truffle-contracts and web3 1.0 here) ... const ...
2
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0answers
35 views

this.contract.deployed() is not a function

I'm working on making a React frontend for my smart contract, but I'm having problems connecting it into my React code. Here are the relevant portions of my code: import TruffleContract from '...
-1
votes
1answer
41 views

Problem with the compilation in the truffle framework

I made a smart contract in Remix-Solidity IDE, when I compiled it I had no errors and I was able to remove the contract but when I tried to use the truffle for my Dapp and compiled it it showed me ...
1
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0answers
65 views

How to use the latest version of Truffle Contract in a web page?

I'm trying to use version 4.0.0 of truffle-contract in a browser app, so no NodeJS, no require or anything. So I followed the instructions in the doc, downloaded truffle-contract in non-minified ...
-2
votes
1answer
35 views

ParserError compiling Smart Contract, what's wrong?

I'm getting this error when trying to compile a contract using cmd on windows: Error parsing C:/Users/alexa/Desktop/contracts/contracts/ApprovalContract.sol: ParsedContract.sol:6:37: ParserError: ...
2
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0answers
37 views

Installing Truffle without npm

I'm a student trying to install a truffle test RPC client (just for simple contract deployment in small scale). I am using a remote Ubuntu machine in my university, and i don't root privileges. ...
2
votes
1answer
38 views

TruffleContract At() function with Drizzle

I am learning the Drizzle framework after I did a project using TruffleContract abstractions in Javascript (DApp). I have multiple instances of a contract and I am not able to access at the instances ...
1
vote
1answer
56 views

Truffle-contract installed, but receiving error in Chrome console: Uncaught Error: Cannot find module 'truffle-contract'

I am working on my first end to end ethereum project. A problem that I am stuck on is that I have installed 'truffle-contract', but when I run my server and open the project in the Chrome browser, the ...
0
votes
1answer
54 views

Set up backup from private Ethereum (Ganache) [duplicate]

I have created an ethereum application with Ganache and truffle js. i have installed ganache in a server, and th application work. but when i stop the server i lose the the smart contract that i have ...
0
votes
1answer
77 views

Loading multiple truffle artifacts from a single sol file

Big picture: How do I get multiple contract instances from a single sol file using truffle-contract? I have two Contracts in my .sol file (it's more of a contract factory) const artifacts = require(...
0
votes
1answer
29 views

Ownership trasfer to crowdsale contract fails while deploying in truffle

I have created a "Token" and the "Crowdsale" contract as mentioned in the openzeppelin. Below is my deployment code in truffle. I am new to ICO related coding and solidity. The question may be very ...
0
votes
1answer
46 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 ...
0
votes
1answer
71 views

Truffle Flattener creates empty flat file

Using trufffle-flattener, I am trying to create a flat file merging all the related solidity based codes. After executing the flattening scripts, I see only the empty flat file getting created. Could ...
0
votes
1answer
20 views

Deploying using Truffle unbox

The following code is taken from truffle unbox initContract: function() { $.getJSON("adding.json", function(addingdappfrontend) { App.contracts.Add = TruffleContract(...
0
votes
1answer
1k views

Uncaught ReferenceError: TruffleContract is not defined

I am working on a smart contract. When I try to serve my smart contract via lite-server I see following error in the browser console Here my app.js source code: https://pastebin.com/UjFuYCyQ I have ...
1
vote
1answer
33 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 ...
2
votes
2answers
72 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
vote
1answer
97 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 ...
0
votes
1answer
36 views

How can I persist the chain state of Truffle develop? [duplicate]

Is it possible to persist the chain state of Truffle develop? If my truffle console crash, can I restore the chain state?
-1
votes
1answer
44 views

I have deployed my contract using truffle but to see my accounts i am using web3 can any one explain what is going inside my contract while deploying

web3.eth.accounts [ '0x5aad8308d0c45d2b9fc1c465316ba071d2eb6f9c', '0x9d73990623df116eb56d300773aa458a11b11e4b', '0x1ea4dc6c3ab6d9ddca32083e3d5313ee319abd29', '...
1
vote
1answer
85 views

Error: Web3ProviderEngine does not support synchronous requests

Error: Web3ProviderEngine does not support synchronous requests. I have an error when deploying contract to rinkeby provider const HDWalletProvider = require('truffle-hdwallet-provider') module....
2
votes
2answers
48 views

Working of Truffle

The following is my code in solidity pragma solidity ^0.4.2; contract DappToken { //Constructor // set no of Tokens // Read the total number of Tokens uint256 public totalSupply; ...
0
votes
1answer
52 views

How to properly test bytes32 in Javascript testing

How do i address the bytes32 testing issue below? From the code below: coinState = await NewCoin.at(newCoinAddress).getAuthorization(web3.fromAscii("1A2B3C4D5E6F7G8H9I0J")); console.log(coinState);...
0
votes
2answers
144 views

Calling Truffle Commands through a script

I made following contract using visual studio code pragma solidity ^0.4.17; contract IDSCheck { mapping( string => string ) PersonHash; function AddHash(string name, string hash) { ...
0
votes
1answer
41 views

Two external function calls not working in combination in our smart contract

So I have the following functions buyTokens function buyTokens(address beneficiary) public payable { require(beneficiary != address(0)); require(validPurchase()); uint256 weiAmount = ...
0
votes
1answer
202 views

Truffle Exec Gets Stuck [closed]

I want to exec a script in the truffle console. script const artifacts = require('./build/contracts/Message.json') const contract = require('truffle-contract') const Message = contract(artifacts); ...
1
vote
1answer
29 views

Create a contract that can restrict the sale of the token in exchange

Possibility of create a contract that can restrict the sale of the token in exchange. Restrict by not selling all token only particular percentage of token. To make use of the major token in ...
1
vote
4answers
870 views

Module not found: Can't resolve './contracts/SimpleStorage.json'

I am new to solidity, truffle and i tried react-box from Truffle and i get the following error. I am using Macos. Here is the basic steps npm install -g truffle truffle develop compile ...
1
vote
2answers
122 views

How to compile and deploy smart contracts programmatically with Infura in NodeJs

I understand that i will need to be able to unlock my account in web3 to be able to deploy smart contracts. It's all good except i'm using Infura's hosted network instead which prevents me from ...
1
vote
1answer
325 views

WEI to ETHER conversion issue with Web3 and Javascript

So i have a form where the user enters a price for an item in ETHER. I understand the blockchain does not handle floatin point numbers currently, so i am attempting to convert to WEI and store it on ...
1
vote
1answer
37 views

react-box call of create data function returns invalid address

error image indicates invalid address. this is on the call of the function. Ideas on why it fails? i suspect i'm missing something simple. Function: createCredentialOrg(event){ alert("...
1
vote
0answers
38 views

Why doesn't truffle set the defaultAccount by default? [closed]

According to this thread, whenever you're trying to interact with the contract's state via truffle develop, you have to do this: web3.eth.defaultAccount = web3.eth.accounts[0]; Why isn't this done ...
1
vote
1answer
220 views

Returning Structs and Lists in Solidity

Is there a particular reason why Solidity prevents you from returning structs, lists and other data structures? I understand that it needs to be secure and allowing array/list access may mess with the ...
0
votes
1answer
49 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) ...
0
votes
3answers
37 views

How I add Security to the smart contract?

I deployed this contract and also interacted with it using ganache. pragma solidity ^0.4.0; contract Counter { int private count = 0; function incrementCounter() public { ...
0
votes
2answers
71 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 ...
1
vote
1answer
198 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 ...