Questions tagged [truffle-contract]
The truffle-contract tag has no usage guidance.
1
vote
1answer
15 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
40 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
25 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
...
0
votes
0answers
23 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 ...
1
vote
2answers
26 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
34 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
0answers
32 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
36 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
21 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:...
0
votes
0answers
15 views
DeclarationError: Identifier not found or not unique and Undeclared identifier
I am trying to create a crowdsale contract using zeppelin. But i am facing following errors.
CrowdSale.sol:6:46: DeclarationError: Identifier not found or not unique.
contract EdCoinCrowdSale is ...
0
votes
0answers
30 views
How to send a value from interface to smart contract function
I have the below contract to create document details:
pragma solidity ^0.5.0;
contract Documents {
struct Document
{
uint256 creationDate;
uint32 documentCreationTimestamp;
...
0
votes
1answer
28 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
vote
2answers
56 views
How use Truffle Framework [closed]
Anyone please help me to understand what is exactly Truffle & Ganache ?
How to install & use Truffle ?
Please reply who are know this.
0
votes
1answer
93 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 ...
1
vote
3answers
39 views
Issue deploying this contract
This is a contract im trying to deploy and i think its an abstract contract as most of the functions dont seem to be implemented... anyway the issue im facing is that truffle is telling me i cant ...
0
votes
0answers
38 views
I am working on a smart contract. I am getting the following error while running the smart contract in the browser console
Uncaught (in promise) ReferenceError: TruffleContract is not defined
at Object.loadContract (app.js:55)
at async Object.load (app.js:8)
here is my code of app.js file
App = {
...
0
votes
2answers
365 views
TypeError: Data location must be “memory” for parameter in function, but none was given
Contract fail to compile in IDE Remix.due to the following error:
TypeError: Data location must be "storage" or "memory" for parameter
in function, but none was given.
version:0.5.6+commit....
0
votes
2answers
55 views
Getting error in truffle migrate
I am trying to compile a sample solidity contract,sampleapp.sol. The code is given below:
pragma solidity >=0.4.21 <0.6.0;
contract SimpleStorage {
uint storedData;
function set(uint ...
0
votes
1answer
17 views
Cannot retrieve data from smartcontract during tests
I am writing truffle tests for my smart contract solidity version 0.4.24. The tests are emitting events to write data to memory through smart contract. But I am unable to retrieve data from functions.
...
0
votes
1answer
102 views
Invalid type for argument in function call. Invalid implicit conversion from mapping
I have defined struct for saving data to ethereum blockchain. I am using uint to map the data stored with a unique ID. I am using truffle framework to write smart contracts with solidity version: 0.4....
0
votes
2answers
639 views
Truffle compile and migrate not working
I have a geth node running on my laptop. This is the command I used to start geth.
geth --port 4321 --networkid 1234 --datadir=./dataDir --rpc --rpcport 8543 --rpcaddr 127.0.0.1 --rpcapi "eth,net,...
0
votes
1answer
182 views
Truffle: Error: Could not find a compiler version matching 0.5.0
I wonder why I get the error when I have v0.5.0 everywhere and do the following:
In my Action.sol:
pragma solidity ^0.5.0;
In Migrations.sol:
pragma solidity >=0.5.0 <0.6.0;
When running truffle ...
1
vote
1answer
41 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
votes
0answers
30 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
votes
0answers
115 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
258 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
183 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
vote
1answer
146 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
135 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
2answers
299 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
votes
1answer
103 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
votes
1answer
110 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
votes
0answers
71 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
30 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
votes
0answers
71 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
34 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
votes
0answers
66 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
90 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
vote
0answers
168 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
92 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
votes
0answers
113 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
90 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
127 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
99 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
161 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
32 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
63 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
132 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
22 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 ...
