Questions tagged [truffle]
Questions regarding the implementation and use of the Truffle development and testing environment.
2,921
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How to get transaction fees and minus it from balance
I created an auction exchange smart contract using solidity programming language and I am using ganache for testing this is a test file written in JavaScript. seller is the creator of auction and ...
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20
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When sending a transaction using web3 I recive EIP1559FeeMarketTransaction.fillFromResult error
I am using a ganache local blockchain and truffle to test my smart contracts, this problem started to occur all of a sudden, since before I wasn't running into this problem.
So when I call the ...
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1
answer
13
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Metacoin - why does `send` show the contract address in `receipt.to`?
I've recently started learning web3 and am playing with truffle.
truffle(develop)> truffle migrate
...
Deploying 'MetaCoin'
--------------------
> transaction hash: ...
- 101
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11
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How to find issue with a bare bone token bridge
Basically, I want to setup a very simple token bridge try to bridge some custom tokens between BSC testnet & Goerli testnet.
For BSC testnet, I created 2 solidity code: TokenBSC.sol & ...
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7
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Truffle console: debug not showing me the code line that reverts a transaction
I'm trying to deploy my own swap router on the development network. I've got a transaction hash which reverts. I'm calling
truffle console
and then, when I press enter I get undefined. I can't reach ...
- 761
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1
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15
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VM Exception while processing transaction: revert while buy token
I built a token based on ERC20, when I try to buy tokens I get this error
In the truffle console
Quinn.deployed().then(function(ins){token=ins}) QuinnSale.deployed().then(function(ins){tokenSale = ins}...
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7
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Mainnet fork deployment - Error: *** Deployment Failed *** "Migrations" hit an invalid opcode while deploying
I am trying to deploy contracts on a mainnet fork. I have my fork running with the command
ganache --fork https://mainnet.infura.io/v3/$INFURA_API_KEY --wallet.unlockedAccounts=$MY_ACCOUNT --chain....
- 11
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1
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43
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Got `invalid opcode` when deploying a contract to Ganache test network from Truffle
I have launched Ganache 2.7.1 in Mac and using truffle 5.11.3. I tried to deploy below contract to Ganache but filed:
helloworld.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.18;
...
- 236
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0
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15
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Can't pass Truffle test with an uint256 array as event property
I have this simple test in truffle:
it("should emit the correct Transfer event", async function() {
await this.contractNFT.multiSafeMint(accounts[0], "CID/metadata.json", 3, {...
- 33
1
vote
1
answer
31
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Problems installing truffle
I've installed truffle multiple times, uninstall and installed again, all I get is command not found
npm install -g truffle
npm WARN deprecated [email protected]: testrpc has been renamed to ganache-cli, ...
- 11
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15
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Can not delete the address from the struct and array in JavaScript
My other functions are working so I guess other codes are fine. I am just getting this error after clicking the delete key:
"Error deleting patient: Error: invalid address
at v (web3.min.js:2:...
-1
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1
answer
28
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how can i deploy my Dapp?
what if I have deployed my smart contract on truffle and used ganache to deploy the same and i havn't used any test network, so if I go to deploy it on netlify to demonstrate the same will it work??
2
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1
answer
14
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Truffle console: How to print uint array
How to print uint array in Truffle's Java script environment?
Hi,
I am following the link:
Printing uint256 value to console while debugging with Truffle
I am working on truffle console environment ...
- 1,406
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47
views
abortHandshake(this, req, `Unexpected server response: ${res.statusCode}`);
truffle migrate --network sepolia
Compiling your contracts...
Everything is up to date, there is nothing to compile.
/mnt/c/pr0/bootcamp-completed/node_modules/ws/lib/websocket.js:542
abortHandshake(...
- 31
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22
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How to deploy a smart contract using CREATE2 with truffle?
How can I deploy a new smart contract using CREATE2 upcode (EIP-1014) with truffle?
- 412
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1
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66
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ERC20 transfer amount exceeds balance error in Solidity contract
I'm encountering an error while trying to transfer tokens from one address to another in my Solidity contract. When I attempt to print the balance of msg.sender, it shows a value of ...
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0
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7
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In truffle, why are the accounts in testing different from the actual accounts of my mnemonics?
Say, the first account from my mnemonic yields 0x123, how come account[0] from accounts in the Truffle test suite differs from the original?
Example:
const BatchTransfer = artifacts.require("...
- 153
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11
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Truffle not finding any functions (uncaught TypeError) or acknowledging debug commands (uncaught referenceError) on WSL
I'm trying to get started with using Truffle but I keep running into issues with the SimpleStorage contract and getting Truffle to work. I'm able to deploy the basic SimpleStorage contract and do x = ...
0
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1
answer
204
views
Cannot read properties of undefined (reading 'address') when trying to use 'truffle run verify'
I have successfully deployed my contracts to the goerli testnet but for some reason, I am not able to verify my contracts using "truffle-plugin-verify". I have added the following keys to ...
- 53
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20
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Getting this error while deploying contract on truffle
I am using command {truffle migrate --network 'Network Name'} to deploy on truffle. I don't know where this error is comming from.
Someone who has worked on truffle, kindly help.
- 100
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19
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Are accounts on Ganache Blockchain considered Nodes?
I wanted to ask a question: the accounts on Ganache are nodes, for example
I mean, if I am in the project, I let the account send the transaction to another account
This process considers that you are ...
1
vote
1
answer
245
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"Migrations" hit an invalid opcode while deploying [duplicate]
I do not understand why this is happening, I have tried many solutions, but still without effect.
Updating the truffle version did not help.
truffle migrate --reset
1_initial_migration.js
=============...
- 11
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11
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Compiling Vyper files results in a 'path exists outside base folder' error
I was working with the truffle VyperStorage Example Box. When I execute truffle compile it shows me the error above. I have installed Vyper using pip.The truffle config.js file is used as default so ...
0
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1
answer
55
views
Truffle migrate Error: PollingBlockTracker
I'm trying to deploy a contract on Avalanche Fuji testnet using Truffle. Here is my truffle config:
require('dotenv').config();
const mnemonic = process.env["MNEMONIC"];
const infuraUrl = ...
- 153
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0
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11
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Error relating to emittery package while running truffle migrate: when I am running truffle migrate following error comes. Can anyone help me on this
const mixin = emittery_1.default.mixin.bind(emittery_1.default);
^
TypeError: Cannot read properties of undefined (reading 'bind')
at Object.call (C:\Users\...
- 1
1
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0
answers
12
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IP host management in truffle_config.js (Private Ethereum Network)
I have 3 Amazon Ec2 instances (each with a Geth node running on them) and I'm running over them my Private Geth Ethereum (PoA) blokchain and I wanted to ask if it was necessary to specify the IPs of ...
- 41
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17
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Truffle migrate didn't migrate contract despite calling truffle migrate --reset
Here's my 2_gimmy_migration.js
const Gimmy = artifacts.require("Gimmy_NFT.sol");
module.exports = function (deployer){
deployer.deploy(Gimmy);
};
I had tried truffe migrate --reset ...
0
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1
answer
47
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Truffle test USDC transfer to contract + instantiate contracts
I'm writing my smart contract tests in JS and using Truffle.
I want to test a specific function in my contract that requires a token address and contract address as parameters:
address _asset, ...
- 1
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0
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4
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the command isn't running when I run the command truffle server
truffle serve is not a valid truffle command. Please see truffle help for available commands
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109
views
How to implement a custom consensus mechanism in Ganache
As a beginner in the Ethereum world, I have developed a blockchain network in Ethereum using Truffle, Ganache and Web3.js. I can deploy smart contract to Ganache network and transactions are included ...
- 11
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0
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16
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How safe is it to use Truffle and store a seed in a script? [closed]
I want to do a script to automate an action. The script would run locally on my computer, using Truffle/HD-wallet-provider.
Is it safe? Having my seed in the first line of the script, or do I have to ...
1
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0
answers
36
views
How to write in etherscan.io "Info" tab with hardhat/truffle?
I would like to achieve the same result as the below images.
How could I populate the "Info" tab on etherscan.io with hardhat/truffle ?
Example 1:
https://etherscan.io/address/...
1
vote
1
answer
28
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storing and retrieving data in Solidity
in another solidity study, I want to implement a contract to store user links. users must log in using the wallet address and be able to save data by name, description, type, and the link itself. ...
- 127
2
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1
answer
94
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Security and Performance of Solidity Contract
I continue to explore solidity. I wrote a small distributor contract that collects ETH from incoming transactions, records the addresses of incoming transactions with a given condition, and ...
- 127
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1
answer
33
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developing a contract that distributes tokens
I am developing a contract that distributes tokens and has already implemented the main functionality. The contract accepts tokens from the owner and distributes them by 1KK to each address from the ...
- 127
2
votes
1
answer
58
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error when working with arrays: DeclarationError: Undeclared identifier
**I am developing a smart contract distributor in the solidity language that will accept BEP20 tokens from the owner with the special contract address: 0x0000000000000000000000000000. the owner of the ...
- 127
1
vote
1
answer
18
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Error in truffle initial migration file
I'm learning solidity with the book "Master etherum". I'm trying to use following program in truffle.
https://github.com/ethereumbook/ethereumbook/blob/develop/code/Solidity/Faucet4.sol
// ...
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2
answers
2k
views
Where can Developers get Sepolia Testnet ETH? [duplicate]
Where can web3 developers get free Sepolia Testnet ETH to use in their development process?
- 121
1
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1
answer
716
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Unhandled Exception: Connection refused - Truffle Ganache Connection with Flutter
I am getting this error when trying to link a smart contract deployed on a Ganache local blockchain with Flutter web3dart package.
Note: Testing on android (both emulator and physical device give the ...
- 111
1
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0
answers
68
views
How to pass web3 client from server to client in next.js?
I spent all day (meh, not a record (but I'm not finished yet lol)) trying to pass the web3 instance to the client side of my app. Why would I use it on the server side? Well, to keep my wallet ...
- 49
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0
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13
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Trying to run a javascript test through Truffle. Truffle is not able to read the javascript file or I cannot understand the issue here
I am trying to run truffle test to test a javascript file on windows through powershell. The results keep showing a syntax error on the first character of the .js test file after compiling all ...
1
vote
1
answer
29
views
Error: Provided address "undefined" is invalid, the capitalization checksum test failed,
I have the following script:
var assert = require('assert');
const path = require("path");
const fs = require("fs");
module.exports = async function(callback)
{
try{
...
- 1,406
1
vote
1
answer
45
views
Reentrancy attack: Safe Remote Purchase
Hello everyone i am new to solidity coding, and i want to improve my security skill regarding smart contracts and evm.
In order to accomplish this goal i tried a reentrancy attack on a simple contract....
- 13
2
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0
answers
50
views
Truffle hit a require or revert statement in simple ERC777 constructor
I have incredibly simple code, taking straight from openzeppelin's ERC777 contract. When I run truffle migrate, however, I receive
Replacing 'Implementation'
--------------------------
*** ...
- 282
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1
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36
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Why am I getting `undefined` when trying to access array elements in Truffle Console?
I am getting an array from my contract, which seems to have the correct number of elements. However, when trying to access the first element using index notation, I am getting undefined:
myArray = ...
- 103
1
vote
2
answers
25
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Blockchain with Vscode
TextFieldValue(text='I switch my career from Laravel dev to Blockchain, I want to know how to setup blockchain environment on your visual studio code. What do i need to install and start over?
I was ...
2
votes
1
answer
29
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Two identical functions inside a truffle migration
The contract VestingWallet.sol from OpenZeppelin have two functions with the same name "vestedAmount", but different parameters to call a particular function.
The first one:
function ...
- 31
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23
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How to transfer money inside truffle console?
When I log in to the truffle console I see there are a bunch of addresses filled with money. I need to transfer an amount to the account that I am using with Metamask. (I don't want to import the ...
- 173
1
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1
answer
17
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Adding chain to gnosis UI
I just followed steps to add new chain using this repo:
https://github.com/safe-global/safe-infrastructure
But when I click on
Nothing happens.
In order to bring up this safe-infrastructure and ...
0
votes
3
answers
179
views
SQL Querying ability using Blockchain
I am working on an application that can handle SQL queries for data stored in Blockchain. Currently I am using Smart Contract for achieving this as this allows me to store the data in a well ...
- 15