Questions tagged [truffle-contract]
The truffle-contract tag has no usage guidance.
246
questions
0
votes
0answers
6 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
23 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
19 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
28 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
17 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
18 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
79 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
27 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
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0answers
26 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
26 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
83 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
40 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
144 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
23 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
424 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
98 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
16 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
26 views
Ganache does not show the transferred amount.but it shows theme in account section
as shown in the picture the amount of value which is transferred to contract is shown in the transaction section of Ganache. I mean it shows the amount which is transacted to the address.
in the my ...
0
votes
0answers
48 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
640 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
127 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
108 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: ...
0
votes
0answers
81 views
How to Access Value of Drizzle ContractData Method
I would like to access the value of a Drizzle ContractData method:
this outputs: 1000000000:
<ContractData
contract={name}
method="getValue"
/>
Now, ...
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
222 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
233 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
79 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 ...
2
votes
3answers
247 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
104 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
194 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
82 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
45 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
1answer
53 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
35 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;
...
1
vote
1answer
158 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
160 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
2answers
319 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
4answers
57 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 ...
1
vote
2answers
565 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....
1
vote
2answers
260 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
33 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
273 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
2k 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
2answers
502 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
84 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
46 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
184 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, ...
3
votes
1answer
666 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
431 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
330 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 ...
