Questions tagged [truffle]
Questions regarding the implementation and use of the Truffle development and testing environment.
2,628
questions
0
votes
0answers
4 views
How to test clone contract functions?
I have a clonable contract which I'm passing to the clone factory contract and I'm trying to access the functions inside it but for some reason only the view functions work.
this.nft = await NFT....
0
votes
2answers
13 views
sha256 works with string memory but doesn't work with bytes32
The problem occurs when generating a sha256 inside contract. This works fine:
function SimpleHash(string memory val) public returns (bytes32) {
bytes32 h = sha256(abi.encodePacked(val));
...
0
votes
0answers
10 views
Truffle compile error. ParseError: Expected ';' but got '}'
I am trying to compile my contract but I get ParseError while compiling Migrations.sol.
I got this error after running
E:\blockchain-learning\hooks-truffle-ganache>truffle develop
truffle(develop)&...
0
votes
0answers
10 views
Hit a require or revert statement somewhere in its constructor
I have created a contract which creates a new UniswapV3Factory contract in the TopLevelContract constructor. The code is below
pragma solidity = 0.7.6;
import './../v3-core/contracts/UniswapV3Factory....
0
votes
0answers
19 views
Interrogation about Truffle deployer.deploy function arguments
I have the following Truffle migration:
module.exports = function (deployer, networks, accounts) {
var receiver = accounts[1];
var balance = 50000000000000000000;
deployer.deploy(MPC, receiver, {...
0
votes
0answers
6 views
can not install truffle?
truffle does not work after insall using (npm install -g truffle) command . this message appears "removed 5 packages, changed 1105 packages, and audited 1074 packages in 28m
81 packages are ...
0
votes
1answer
8 views
Interacting with Deployed contract- Truffle develop
Hoping some of you may be able to help me. I have a very simple contract that i have deployed. I won't post the entire contract here, but i will post the one function i am having trouble calling from ...
0
votes
0answers
9 views
Truffle Pet Shop Parse Error
I keep getting an error when I try "truffle compile" on the truffle pet shop tutorial. Here is my code
pragma solidity ^0.5.0;
contract Adoption {
address[16] public adopters;
function ...
0
votes
1answer
22 views
How to test sending transaction from zero address in truffle
I have some smart contract which has this function:
function someFunction() external returns (uint256) {
require(msg.sender != address(0), "zero address");
//some code....
...
0
votes
0answers
5 views
abi from ropsten.etherscan.io site vs Truffle abi
I have initially deployed an openzeppelin upgradeable Smart Contract (SC) on my local Ganache blockchain using Truffle, referring in my Dapp to the abi that is generated to a local file (everything ...
0
votes
1answer
14 views
I made the front end first
I'm creating my first app with truffle but I made the front end first... I wanted to replace the client folder with my existing react app but I noticed the App.js file has numerous functions that I ...
0
votes
0answers
10 views
dapp university youtube tutorial for a defi example
I was following along this tutorial but at this point, I tried to run: truffle compile
and get this error that I tried fixing by installing via npm babel-runtime and core/js
but the problem is still ...
0
votes
0answers
13 views
Saving migration to Binance smart chain testnet failed using truffle
I am trying to migrate my contracts to the BSC testnet but I constantly get an error message:
Saving migration to chain.Error: PollingBlockTracker - encountered an error while attempting to update ...
0
votes
0answers
8 views
Truffle migration, how to get the deploy file on the previous migrate?
I have encountered the problem when I use truffle migration, it works fine so I deploy the contracts on the mainnet for actual use.
After a while, I decided to make some changes and try to upgrade the ...
0
votes
1answer
10 views
Trouble sending correct amount of a token with web3
i'm trying to transfer a value of 1 of my erc20 token to my contract. In my front end I am using:
tokenContract.methods.approve(contract_addr, 1).send({from: accounts[0]});
In my smart contract I am ...
0
votes
0answers
13 views
Cannot migrate contract to blockchain on Truffle's Pet Shop tutorial
I have completed Truffle's Pet Shop tutorial up to the point of migrating the Adoption.sol contract with 2_deploy_migration.js .
This is the error that shows up in the terminal.
Starting migrations...
...
1
vote
1answer
15 views
Testing address(this) generates exception, how to obtain the correct value for address(this)
I have modified the following code from a michalzalecki website https://michalzalecki.com/ethereum-test-driven-introduction-to-solidity/ to test address(this):
pragma solidity 0.5.16;
import "...
0
votes
1answer
6 views
compare uint from datestamp always return true
function testDate(uint date1,uint date2)
public
returns (bool)
{
require(date1 == date2,'not same date')
return date1 == date2;
}
let res = await TestSol.testDate.call(‘1630972800’，‘1631145600’)...
0
votes
0answers
18 views
Eternal storage smart contracts
I am trying to make smart contracts with an eternal storage design. So lets say I have contract A and B:
Contract A is Ownable
{
struct Item
{
uint256 id;
uint256 price;
address ...
0
votes
1answer
14 views
How to fix error of compiling the smart contract: Invalid number of parameters for "undefined"?
I want to compile a simple smart contract using truffle.
my smart contract SimpleStorage.sol
pragma solidity >=0.4.16 <0.7.0;
contract SimpleStorage {
int public sensorData;
constructor(...
0
votes
1answer
12 views
Truffle develop exec cant exit [closed]
I am running exec with .js script and once it is finished I cant get out of it, cursor keeps blinking and all the ctrl+c or +d doesnt help. I cant get back to console, so need to open new tab for each ...
0
votes
0answers
9 views
How to test in local, a contract if call an AMM contract?
I'm trying to test a smart contract but i have inside of my contract a call to PancakeSwap and i would like to test it, but i dont find what is the good way to do it:
i have to mock router´s contract?...
0
votes
0answers
20 views
Web3 from account question
Hello can anyone tell me why I would be getting an error when i type this in the Truffle develop console? app.setGreetings(“Hey Ladies!”, {from: web3eth.accounts[0]})
The error it is giving is... ...
0
votes
1answer
15 views
ERC721Burnable TypeError: Definition of base has to precede definition of derived contract
I'm getting an error due to Burnable but it's not even in my contract.
@openzeppelin/contracts/token/ERC721/ERC721Burnable.sol:12:46:
abstract contract ERC721Burnable is Context, ERC721
...
0
votes
2answers
45 views
Issue while migrating to Ropsten network
I am trying to migrate the contract to ROPSTEN network. It fails for the following reason. Please advice.
migrate command
$env:MNEMONIC=' XX XX XX';truffle migrate --reset --network ropsten
Error
...
0
votes
0answers
16 views
Problem adding custom rpc on metamask mobile
I'm trying to use metamask mobile for my android dapp development and I need to create truffle's custom rpc but it gives me this error:
0
votes
1answer
51 views
Do I need to front the cost of gas to sell a collection of NFTs
Forgive me if this has been asked before, if it has please provide any resources so I can learn more!
I'm having trouble wrapping my head around the development process of creating an NFT.Say I want ...
0
votes
0answers
31 views
'Error: invalid arrayify value (argument="value", value="", code=INVALID_ARGUMENT, version=bytes/5.0.5)\n'
I have the following solidity function that I'm calling from truffle:
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
...
0
votes
0answers
21 views
How to addLiquidityETH in truffle console?
I'm trying to addLiquidityETH in truffle console but keeps running into ds-math-sub-underflow error. The pool pair is created at contract constructor and the wallet has more than enough for myToken ...
0
votes
0answers
38 views
How to write Test case for Internal functions in solidity which inherits the ERC721
**This is my Smart Contract code which has inherited the ERC721 and I want to write the test case for _setTokenURI **
contract ProductNFT is ERC721 {
constructor () public ERC721(_tokenName,...
0
votes
0answers
22 views
Truffle: Test contract creation from another contract
I have two contracts, Factory working as a factory for Business:
// Factory.sol
pragma solidity ^0.8.7;
import "./Business.sol";
contract Factory {
// Public only for debugging ...
0
votes
2answers
12 views
How can I return a array of string[5] from a function that returns a string[]?
I'm wondering why if my function is meant to return a string of indeterminate length, I can't return a string array of definite length.
This function, for example doesn't compile
function ...
2
votes
1answer
79 views
MetaMask (Web3) Inflates Transaction/Mint Price to Ridiculous Amount
I am writing a dApp/UI for my ERC721 smart contract and facing a recurring issue.
My contract has been deployed to the Rinkeby test network and the contract has been verified on Etherscan, allowing me ...
0
votes
1answer
29 views
Truffle test in solidity with sending value
I have a simple contract with public function, that can receive value and do something based on that value:
pragma solidity >= 0.8.0 < 0.9.0;
contract ContractA {
uint public boughtItems = ...
0
votes
1answer
55 views
Cancelling truffle migrate to mainnet. With previous pending transactions that have low gas prices
I am exporting my smart contract to the Ethereum mainnet and I am using Truffle to export my smart contract. However when deploying I was trying out multiple parameters and as a result have 11 ...
0
votes
0answers
21 views
Why does this function produce an error in truffle but not not in remix?
I have a string handling library, consisting of several functions, but only one of them produces an error when I run it in truffle test. (The other functions seems to work fine.). This function does ...
1
vote
0answers
13 views
Better way to access ABI using Truffle in Production?
I would like to know what would be the best way to access ABI.json to interact with the contract using web3.js on the front end?
I create a route (example: /abi.json) pointing to the ABI generated in ...
0
votes
1answer
25 views
ERC-721 testing with JS - ReferenceError: use is not defined [closed]
I am following this tutorial: https://youtu.be/YPbgjPPC1d0
Got stuck at 34:47. This is the code I have written:
const Color = artifacts.require('./Color.sol')
require('chai')
use(require('chai-as-...
0
votes
1answer
12 views
Truffle testing proxy contracts and delegation
I have a proxy contract ( Openzeppelin proxy ) and a custom Logic contract.
the logic contract has a method
function asd() public pure returns(uint256){
return 5;
}
since the proxy has a ...
0
votes
0answers
16 views
Truffle test fails with Error: Returned values aren't valid, did it run Out of Gas?
I created a string function library (using VS Code, Truffle and Ganache) which depends on another library, and one of the functions keeps failing with this error message when I run a truffle test as ...
1
vote
0answers
34 views
Compiling contract failes
I want to create crowdsale, but when compiling contracts i got:
Compiling your contracts...
===========================
> Compiling ./contracts/Migrations.sol
> Compiling ./contracts/TubblySale....
0
votes
0answers
13 views
Truffle : Source code in build/contracts/HelloWorld.json doesn't change after first migrate
build/contracts/HelloWorld.json
line 890:
"source": "// SPDX-License-Identifier: MIT\r\npragma solidity 0.8.7;\r\n\r\ncontract HelloWorld{\r\n function hello() public pure returns(...
0
votes
0answers
9 views
Metamask Mobile does not recognize the id of the Truffle chain
I'm trying to connect my MM mobile to Truffle develop chain in PC but in Android appears:
Could not capture string id. Is the RPC URL correct?
Only on Android, I tested on iPhone with the same data ...
0
votes
1answer
17 views
Can't add more ETH to my object
there's something wrong with my code but I can't see what. I'm trying to create "pots" where you can add ETH inside.
mapping(uint => Pot) public pots;
mapping(uint => mapping(address =&...
0
votes
2answers
37 views
Error: *** Deployment Failed *** -- Invalid number of parameters for "undefined". Got 0 expected 1!
I am trying to deploy my smart contract. Upon deployment, I get this error message.
Here is my contractToken.sol
pragma solidity ^0.5.2;
contract BPToken {
uint256 public totalSupply;
...
-1
votes
1answer
28 views
BSC testnet seems to be not up to date at truffle
it looks like my truffle setup is far behind the actual testnet, resulting that I cant deploy anything (getting timeout)
🔢 Code to reproduce
truffle-config.js
bsctestnet: {
provider: () => ...
0
votes
1answer
19 views
Stack too deep solution for struct having more properties fields
My struct
struct UserIdea {
string area;
string path;
string ideaType;
string ideavalue;
string amountValue;
string ideaVerifiedThrough;
...
0
votes
0answers
8 views
Initialise struct with nested mappings in a truffle test
I am writing a test following the following examples:
https://www.trufflesuite.com/docs/truffle/testing/writing-tests-in-solidity
In the test I need to define a struct located in the storage.
I wrote ...
0
votes
0answers
4 views
I am having problems migrating my contract to ganache(error: Invalid number of parameters for "undefined". Got 0 expected 3!)
My migration file looks like this:
var BlindAuction = artifacts.require("BlindAuction");
module.exports = function (deployer) {
deployer.deploy(BlindAuction);
};
Ganache is running fine. ...
1
vote
1answer
34 views
How to assign an array inside a struct?
I'm trying to assign an array to a struct item.creators.push(_creators[i]);, but it's not being assigned. I don't receive any error from the compile, but the only attribute that is created inside &...
