Questions tagged [truffle]
Questions regarding the implementation and use of the Truffle development and testing environment.
2,486
questions
0
votes
0answers
6 views
Connecting HTML buttons to functions of my smart contract
These solidity functions are part of my solidity code which i want to execute them by clickcing on a button on my HTML.One of them stands for accepting bets placeBet() and the other one for sending ...
1
vote
1answer
15 views
Can someonehelp me correct the error?
"I have tried every which way to get the flaw to go away, I tried to debug, I have _erc under-scored it, I just cannot seem to put my finger on it. here is the original contract:
import "./...
0
votes
0answers
9 views
how much is the gas fee when forking uniswap with @openzeppelin/contracts?
I have tested it on remix , but in truffle is there anyway you can spend less? people have said it was 500 $ seems steep, if it's the truth is what i am curious of. has anyone successfully done it?
0
votes
0answers
11 views
Everytime I update a file with Sublime Text 3 it changes permissions in Ubuntu 18.04
I'm new to this stuff, trying to go through a Solidity tutorial on YouTube where you create an ERC20 token. I am on Windows 10, I downloaded Ubuntu 18.04, Truffle, and Sublime Text 3. The issue I'm ...
0
votes
0answers
17 views
Not able to understand migration file for Crowdsale in ERC20
I am trying to understand nuts and bolts of the simple CrowdSales in ERC20.
In the simplest way, we have a smart contract that mint the fixed number of tokens (SimpleToken) and then we have the ...
0
votes
0answers
10 views
Not able to connect metamask to custom network
App = {
web3Provider: null,
contracts: {},
account: 0x0,
init: async function() {
return await App.initWeb3();
},
initWeb3: async function() {
if(typeof web3 !=='undefined'){
...
2
votes
2answers
23 views
why do i get the error Contract Token“ and ”Ethswap" token contract is not deployed to detected network error
I deployed my contract sent my decentralized application to Github pages.
(GH.pages) here is the link to see it, it will say error not deployed to the detected network if you want to see the ...
1
vote
1answer
30 views
Cannot send ETH to contract using solc 0.8.4 using truffle console (revert)
I spend like 6 to 8 hours on this issue, finally asking here on the following problem.
Goal
I want to sent ETH from one of the default Ganache addresses to the deployed contract SportBet.
Versions
...
0
votes
0answers
15 views
Percentages with Big Numbers Truffle Test
I am trying to find a percentage using the Big Number library from @openzeppelin/test-helpers
Here is the code:
var someVarABC = new BN('2706');
var someVarDEF = new BN('5060584');
var total = ...
0
votes
0answers
19 views
Receving Error “'Migrations'— invalid sender” during deployment to BSC mainnet
I have tried each of the suggestions mentioned in the official issue pointing to this problem to no prevail in BSC MainNet.
I have had success in BSC TestNet as well as Ropsten TestNet.
However, the ...
0
votes
0answers
109 views
Fail with error 'UniswapV2Router: EXPIRED'
I forked UniswapV2's factory and router and deployed them in Kovan using remix
I also made sure that I am sending an ETH
I also made sure that I approved the tokens
But I am getting this error when ...
3
votes
1answer
39 views
Link a library to a smart contract only with Solidity and bytecode
I work in Truffle development environment and use Windows PowerShell. My Solidity code is a test code and is simple. There is a library called Alireza that just compares two uint values. There is a ...
0
votes
0answers
7 views
where to hide the private wallet key in my dapp?
Hey I'm making my first dapp and I just want to hide my private wallet key outside of the application itself.I've made other apps before, and I know keys can be hidden off the app with FireBaseConfig, ...
0
votes
0answers
20 views
How should I reset a user's password?
So I'm making a dapp. This portion uses smart contract for login. I need to add the ability to reset the user's password if they forget it.
contract Auth {
struct Credentials {
string fullName;
...
1
vote
0answers
11 views
Accessing a public mapping from a deployed Ethereum Contract
I'm trying to get my Contract to interface with the already-deployed CryptoPunksMarket Contract, seen here:
https://etherscan.io/address/0xb47e3cd837ddf8e4c57f05d70ab865de6e193bbb#code
Specifically, I ...
1
vote
1answer
25 views
Incorrect Product of BigDecimals
My solidity function emits an event with a uint256 of: 5060584000000000000000000
The problem is on the truffle side in my javascript test.
Here is the code:
const { BN, expectEvent, constants } = ...
0
votes
0answers
15 views
Connect MetaMask with Ganache
unable to connect MetaMask with local blockchain(Ganache)
Chrome Console Error
truffle-contract.js:425 Uncaught (in promise) Error: Contract has not been deployed to detected network (network/...
1
vote
1answer
11 views
multiple arguments giving error web3 [closed]
.addMedicalReport(
patientBio.id,
patientBio.name,
patientBio.birthDate,
patientBio.phoneNumber,
patientBio._address,
patientBio.MedReportId,
...
1
vote
1answer
10 views
How to initialize and assign value to constant in constructor?
I have the following code and want to initialize a constant in constructor.
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract IToken is ERC20 {
uint256 private ...
0
votes
2answers
41 views
Truffle Deployment Error: has no network configuration for its current network id (97)
I'm having an issue deploying a contract with Truffle. The contract constructor takes 7 parameters which are all within the 2_deploy_xxx.js file. However, every time I do, I get an error when I get to ...
0
votes
0answers
46 views
{ code: -32000, message: 'invalid sender' } - Truffle deployment with Infura endpoint to Rinkeby
I am having trouble with deployment of a project contract to the Rinkeby network using @truffle/hdwallet-provider and an Infura endpoint. Here is the code for deploy.js:
const HDWalletProvider = ...
0
votes
0answers
18 views
How do you deploy a smart contract to GoQuorum?
I have a set of smart contracts that I have compiled and deployed to rinkeby test network. I now need to deploy the to a private goquorum blockchain that runs on the IBFT consensus. The blockchain was ...
0
votes
0answers
15 views
How to pass a blank bytes calldata into a solidity function call?
I have a function that looks like this:
function foo(uint _someVar, bytes calldata _data) public {
...
}
Then I make a call to it from another function with "" as _data:
foo(123, "&...
0
votes
0answers
8 views
How do you test your contracts, and how long do you spend testing?
I want to improve how I test to increase my effectiveness and efficiency, so would like to hear from others.
How do you test your smart contracts i.e. do you have a particular methodology for what ...
0
votes
1answer
13 views
Verify a signature generated with web3 in solidity
I am trying to verify a signature in solidity, which I generated in my truffle test. I followed this tutorial for implementing the smart contract, but made small adjustions:
library Lib {
/**
...
1
vote
1answer
39 views
Error when migrating contracts using truffle
When using traffle deploying contracts it gives these errors:
"Migrations" -- Unable to decode sender address from transaction:
Incompatible EIP155-based V 38 and chain id 3.
See the ...
0
votes
0answers
14 views
How to use openzeppelin contracts for a specific version
Consider me a beginner to writing smart contracts.
My question is, openzeppelin's contracts are using latest versions of solidity (by their repo). How do I use say 0.6 version, do they have it ...
0
votes
1answer
18 views
What are the ways of creating contract instance in a client environment, example in test?
I have found this sample from udemy course
https://github.com/acloudfan/Blockchain-Course-Basic-Solidity/blob/93ca256bcf8c436c144425291257dcff5c3b269f/test/TestMetacoin.sol#L10
It uses the ...
0
votes
0answers
13 views
error.message.indexOf is not a function truffle ganache
for truffle developers
var Election = artifacts.require('./Election.sol');
contract("Election",function(accounts){
var electionInstance;
it("throws an exception for double voting"...
0
votes
1answer
18 views
What are the truffle console commands to interact with a mapping function of struct
Im writing a simple smart contract to store and retrieve data of series of patients' name and blood group with an id using mapping function in solidity. I don't know the commands to interact with the ...
0
votes
0answers
79 views
Can I burn tokens held by uniswap/pancake contract?
I'm trying to implement a function in solidity that burns tokens in liquidity. e.g I add 10k tokens to pancakeswap, after some sales I have 15k tokens in liquidity and I want to burn 5K, so I decided ...
1
vote
1answer
53 views
Hit a require or revert statement somewhere in its constructor?
I'm trying to fork a token contract and deploy it locally using ganache but I keep running into the following error:
I have tried to debug the error using truffle debug 'transaction' and find the ...
1
vote
0answers
10 views
How to return a constant string?
I have recently started learning solidity. I added a function showMessage() like below:
function showMessage() public view returns(string memory) {
return "This is a constant";
}
...
1
vote
1answer
35 views
I ran into an error when using Pragma Solidity 0.4.24
I use pragma solidity 0.4.24 on the smart contract, but when running the truffle compile command, an error appears like this:
===========================
> Compiling ./contracts/ImageRegister.sol
&...
3
votes
0answers
93 views
Unable to use Truffle Migrate with Kovan
I'm trying to use Truffle for the first time to deploy and test my new Smart Contract. I can deploy and test it in Remix just fine, but the truffle migrate command fails with the following error:
...
0
votes
0answers
17 views
Getting ETHER balance from an account on Ganache node
Currently trying to get the amount of ether on a given account. Running Truffle on windows 10, and entered into the truffle console. Trying to run the following command:
web3.fromWei(web3.eth....
0
votes
0answers
30 views
Verifying contract on bsc testnet using truffle plugin verify fails
I have a project that compiles and deploys successfully on binance smart chain testnet. I am trying to verify the contract using truffle run verify NiftRouter --network bscTestnet --debug command but ...
0
votes
1answer
20 views
Import address truffle console with private key
Im deploying to the BSC testnet:
bscTest: {
provider: () => new HDWalletProvider(privateKey, `https://data-seed-prebsc-1-s1.binance.org:8545/`),
network_id: 97,
confirmations: 1,
...
0
votes
1answer
19 views
Why is .call() necessary when I want to see returned values from a function?
In my contract I have this function (solc 0.8.4):
function makeDecision(address person) external returns (string memory name, bool approved) {
require(msg.sender == loanOfficer, "Only ...
0
votes
0answers
14 views
Truffle when is deployer.link required for migrate
In truffle quick start, its contract MetaCoin has dependency of library ConvertLib. Then in the deployment file, deployer.link(ConvertLib, MetaCoin) is manually added, and if deployer.link is deleted, ...
0
votes
0answers
6 views
How to replace on going mainnet deployment?
I'm using truffle to deploy my contracts on mainnet. I need to replace a deployment transaction by manually setting nonce. I couldn't find a way to use nonce on truffle deployer. Is there any method , ...
0
votes
0answers
5 views
Successfully migrated Solidity file isn't showing up in Ganache GUI
I was trying to test out deploying a 'hello world' equivalent smart contract via truffle onto ganache for practice and ran into the following issue with the network/deployment step:
I ran truffle init ...
1
vote
0answers
13 views
Deploying Migrations.sol file in mainnet
I've seen some tutorials about deploying a smart contract to mainnet using Truffle.
In those tutorials they are also deploying Migrations.sol contract to mainnet.
What is the purpose of doing that? I ...
0
votes
0answers
14 views
My button created on my HTML file resulted in failed transaction when it interacted with smart contracts function
I created a simple html to register an address in smart contracts. The function in smart contracts have been tested and it passed. So i believe my problem should be in how the input data transferred ...
2
votes
1answer
115 views
uniswap solidity contract: swapExactTokensForTokens Failed in my own smart contract
I am using sushiswap to transfer weth to dai. Everything goes fine when I use web3.js to call swapExactTokensForTokens directory.
However, thing goes wrong when I try to include the ...
0
votes
0answers
15 views
Send LP tokens to a payable function using truffle console
I am trying to stake the LP tokens that I got after adding liquidity in pancakeswap contract function. I can see the LP tokens in my metamask wallet as well. Now I cant understand how will send some ...
0
votes
1answer
19 views
'Transaction nonce is too low. Try incrementing the nonce.' while following truffle tutorial
I ran into a nonce error on the last leg of this tutorial : https://www.trufflesuite.com/boxes/flashloan-box
I also supplemented the tutorial with this video on yt(fyi b/c some of the code comes from ...
0
votes
0answers
27 views
RangeError: Maximum call stack size exceeded or Contract code size over limit, yet this is just a copy of a contract already deployed
I am trying to create a DeFi app that works with PAXG gold token. But in order to do this, I need to first be able to deploy a copy of PAXG on my local testnet (Ganache).
I have forked the github and ...
0
votes
0answers
14 views
What is the purpose of a dry run in truffle?
What is the purpose of a dry run in truffle? I mean apart from showing you how much it will cost to deploy your contract?
2
votes
1answer
22 views
Can I Specify gas fees in the smart contract?
Deploying my contract on rinkeby cost ~12 USD in gas fees (using truffle cli). Is it possible for me to specify gas fees/set a limit in the smart contract so it costs me 0.5 USD, but takes longer to ...
