Questions tagged [truffle]
Questions regarding the implementation and use of the Truffle development and testing environment.
1,870
questions
0
votes
1answer
15 views
Deploy contract dynamically based on user request
Inspired by this blog: https://medium.com/coinmonks/escrow-service-as-a-smart-contract-the-business-logic-5b678ebe1955
I want to deploy contract once a buyer want to purchase a service. However, I ...
1
vote
1answer
18 views
Upgradability Proxy ADMIN_SLOT assembly sstore does not update
I'm currently playing around with Proxy Upgradability, and noticed the use of assembly in terms of the new upgraded contract and the slot assigned. Real implementation can be seen here.
I have ...
0
votes
1answer
55 views
I am getting error while installing truffle in Ubuntu 16.04 LTS. How to resolve this issue?
When i enter this command:
sudo npm install -g truffle
I get the following error:
> truffle@5.0.27 postinstall /usr/lib/node_modules/truffle
> node ./scripts/postinstall.js
Error: EACCES: ...
0
votes
1answer
23 views
How does a transaction verified with Truffle test?
I'm a new to Ethereum and Solidity, and I don't understand how Truffle executes transaction calls.
From what I learned and understood, if I try to use a contract method which changes the contract's ...
0
votes
0answers
18 views
Smart-contracts referencing each other [duplicate]
How would one retrieve these three addresses in the "Knot" smart-contract? I am very new to this, and would like to know whether this is even possible. The "Knot" contract should be able to reference ...
2
votes
1answer
28 views
Kaleido private network transaction exited with an error (status 0) after consuming all gas
I've created a private PoA network with two geth nodes using Kaleido (release 1.0.13) and am trying to deploy some smart contracts to it using the drizzle-kaleido-box boilerplate from truffle. The ...
1
vote
1answer
19 views
truffle migrate --network kovan issue
When I run truffle migrate --network kovan in the terminal the contract deployment doesn't run. Just:
Compiling your contracts...==================== >Eveything is up to date, there is nothing to ...
0
votes
0answers
49 views
Error when testing the contract
ApprovalContract.sol
pragma solidity ^0.5.1;
contract ApprovalContract{
address public sender;
address payable public reciever;
address public constant approver=...
0
votes
0answers
28 views
uncaught error:invalid address
Uncaught (in promise) Error: invalid address
at inputAddressFormatter (formatters.js:271)
at inputTransactionFormatter (formatters.js:97)
at method.js:89
at Array.map (<anonymous>...
0
votes
1answer
20 views
Issue with Serverless deploy of smart contract-Dependency mismatch -Package.json,Package-lock.json error
I'm trying to deploy my smart contract serverless(AWS lambda) and I'm using Truffle framework.
The code is getting deployed in an earlier system(earlier it was deployed here). Now I have updated the ...
1
vote
0answers
24 views
Cannot read property 'type' of undefined - abi-coder
I'm creating a simple voting contract.
It is deployed with truffle and infura.
This is the contract code:
pragma solidity >=0.4.21 <0.6.0;
contract Voter {
struct OptionPos {
uint ...
0
votes
1answer
20 views
Failed to install Truffle on MacOS Mojave
I am currently really struggling in getting Truffle up and running. I am running MacOS Mojave and have Node (v.10.16.0) and NPM (6.9.0) and have tried
npm install -g truffle
and have gotten:
...
0
votes
2answers
87 views
File import callback not supported import “./IERC20.sol”;
when I try to compile my contract I see errors like this :
DemirelToken.sol
https://eksiup.com/p/4z49413damc3
here's the code :
pragma solidity ^0.5.0;
import "node_modules/openzeppelin-...
1
vote
0answers
13 views
estimateGas works on Truffle, but fails on geth
I'm trying to estimate the gas required for deploying a smart contract. It works fine in Truffle, but fails in Geth for some weird reason:
truffle(develop)> await web3.eth.estimateGas({ data: '...
1
vote
0answers
19 views
“truffle init” not working after installing
After I install truffle with:
$ npm install -g truffle
And get:
/usr/local/Cellar/node/12.5.0/bin/truffle -> /usr/local/Cellar/node/12.5.0/lib/node_modules/truffle/build/cli.bundled.js
...
0
votes
1answer
23 views
cannot “npm install -g truffle” in PowerShell - #ERROR (cannot find module 'original-require')
What's this error? How can I resolve
0
votes
0answers
30 views
Hosting pet-shop DApp on IPFS - JSON Files problem
I am trying to host DApp "pet-shop" which one of the truffle boxes on IPFS. rsyncing of src, build/contracts and ipfs add files went very well and there are plenty of peers as seeders on the network ...
0
votes
2answers
34 views
Unused function parameter. Remove or comment out the variable name to silence this warning
I have a smart contact which have 2 owner address and 3 functions.
my set functions is set a users with msg.sender and my getUser functions is returns name,surname and age and I want to add a admin ...
0
votes
0answers
41 views
Truffle Contract deployment >> Error: Returned values aren't valid, did it run Out of Gas?
I have a rpc enabled running private ethereum blockchain node with mining enabled.
I have connected to it using metamask and have performed some contract interactions (deployment, calling functions,...
0
votes
0answers
30 views
How to fix? Tx nonce go out of sync when using multiple unit tests on the same contract under Ganache+Truffle
Here is my example contract (ignore the fact this could be pure, this is a simplified example and my real example is not a pure function, it changes state, but I can reproduce the bug with this simple ...
0
votes
0answers
38 views
Running Migrate in Truffle does not work
I have been using Remix for developing my dapp but decided I should use Truffle to make things a little more robust and professional. I have truffle and ganache installed. I run
truffle migrate
and ...
0
votes
2answers
29 views
Truffle migrate --network ropsten always runs development network
I am trying to deploy a simple contract to the Ropsten network using Truffle and Infura. I have set up the Ropsten network in the truffle-confug.js file but it seems truffle always uses the ...
0
votes
0answers
23 views
Contract.deployed() does not work as expected
I use Truffle to test a contract. When i use Contract.deployed() and i fetch address, for example :
In a first test, the contract's address is
0x07D899846146b3503dE9D9Dc36B94C2e428eA434
In a second ...
0
votes
0answers
16 views
I keep getting this Error when i tried to use contracts instance to call a contract's function?
I tried creating instance by:
const certificate = Certificate.deployed();
OR
const certificate = Certificate.at(config.contract_id);
ANd i get this Error below:
TypeError: Cannot read property '...
0
votes
2answers
21 views
Truffle error missmatch artifact
What does this means?network/artifact mismatch Contract has not been deployed to detected network but when i write truffle network i can see mine.
0
votes
1answer
57 views
Truffle error when deploy a contract
Does anybody know how to solve this? I've try to compile and deploy my contract to get the address, why obtained this error
Error:
1_initial_migration.js
======================
Deploying '...
-1
votes
1answer
16 views
Truffle ganache error
I have this error~!
Contract has not been deployed to detected network (network/artifact mismatch)
Can you help me thank you!
0
votes
0answers
12 views
How do I fix Truffle deployment not working on struct array: “components found but type is not tuple; report on GitHub.”?
I wrote the following, which compiles in truffle just fine, but will not deploy. I get the error "components found but type is not tuple; report on GitHub." Am I doing something wrong appending to a ...
0
votes
0answers
27 views
Unhandled Rejection (TypeError): Election.methods.addCandidate is not a function
//solidity code
function addCandidate(string memory _name) public
{
candidatesCount++;
candidates[candidatesCount] = Candidate(candidatesCount, _name, 0);
}
//App....
0
votes
1answer
54 views
Migrations ran out of gas
I have unboxed pet-shop. Then inside the contracts folder, I made a file Election.sol which has the code -
pragma solidity ^0.5.8;
contract Election{
string public candidate;
constructor() ...
2
votes
2answers
188 views
What's the difference between Truffle Migrations and ZeppelinOS upgradeable contracts?
It was my understanding that Truffle migrations will move updated contracts to new addresses. As a developer, you can use this feature to update already deployed contracts with new code.
ZeppelinOS ...
0
votes
1answer
21 views
What exactly happen when we execute truffle migrate --reset?
I have a old ABI generated by executing truffle migrate.
Now I update the code and generate a new ABI by truffle migrate --reset.
What exactly happens by executing truffle migrate --reset ?
What ...
0
votes
0answers
62 views
“Migrations” hit an invalid opcode while deploying on deploy Migrations.sol with Truffle
An error occurs when truffle migrate try to deploy Migrations.sol contract, i don't understand why
pragma solidity >=0.4.21 <0.6.0;
contract Migrations {
address public owner;
uint public ...
0
votes
2answers
26 views
Effective way to compare to arrays
What is the most cost effective way to compare to arrays eg. uint arrays in solidity. Running a for loop takes too much gas.
0
votes
1answer
153 views
TRUFFE MIGRATE: Saving migration to chain.Error: Error: Error: Returned error: VM Exception while processing transaction: invalid opcode
$ truffle migrate
Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.
Starting migrations...
======================
> Network name: ...
1
vote
1answer
54 views
Solidity Error:Running Out of Gas / selfdestruct problem
I've been going through 'Building Cryptocurrency and its ICO' by DappUniversity.
I know many have questioned this issue and I've been through all the post but couldn't resolve it.
The problem is self-...
0
votes
0answers
33 views
Truffle migration contract [duplicate]
Why do we have to deploy the migration solidity contract in truffle? Do we also have to deploy it during production? Why do we have to deploy it so many times and why can't we use a single large ...
1
vote
2answers
33 views
How to test events that were sent by inner transaction / delegate call?
Usually, using truffle I can check for events like this:
let { logs } = await myContract.doSomethingImportant( xxx );
// 1500 tokens are expected to get
expectEvent.inLogs(logs, '...
0
votes
0answers
27 views
Drizzle Installation: pauses at fetchMetadata: sill resolveWithNewModule http-https@1.0
I am following this tutorial https://www.trufflesuite.com/tutorials/getting-started-with-drizzle-and-react. Everything is working smoothly until I have to npm install drizzle. I then run into the ...
0
votes
1answer
17 views
Why do my events not emit the correct value?
When testing a contract with Truffle, I have found that the variables that are emitted by the event do not match the values that are passed into the event emission. Why does the event not return the ...
0
votes
2answers
49 views
Operator & not compatible with types bytes32 and int_const
i have the code below:
uint256 lastBlockNumber = block.number - 1;
bytes32 hashVal = bytes32(block.blockhash(lastBlockNumber));
bytes5 _byteData = bytes5((hashVal & 0xffffffff) <&...
1
vote
1answer
55 views
truffle deploy live | transaction not mined within 750 seconds
I'm trying to deploy my smart contract to the live ETH network. I've done the same process on rinkeby and it works fine. However during the block mining phase it times out and gives the error:
" ...
1
vote
1answer
134 views
Transaction exited with an error (status 0) after consuming all gas
I developed some smart contracts to be deployed to a private PoA (Proof of Authority) blockchain. I spun up a private blockchain via truffle develop and got the following receipt:
Compiling your ...
0
votes
0answers
43 views
Expressjs backend (truffle box) with metamask
I use truffle to unbox the express-js box (https://truffleframework.com/boxes/express-box). The code loads the web3 instance in server side which connects directly to ganache.
Now I want to be able to ...
1
vote
1answer
47 views
Drizzle - accessing array items from a getter
In my contract I have a getter function that returns a full array of addresses:
function getDeployedCampaigns() public view returns(address[] memory) {
return deployedCampaigns;
}
Using drizzle ...
0
votes
2answers
44 views
Error: Invalid number of parameters (regular getter function). Got 0 expected 1!
Playing with drizzle, I am trying to use a getter for an uint variable campaignCounter, that gets incremented by 1 whenever a factory creates a new campaign.
Here is my component's code:
import ...
0
votes
2answers
81 views
Uncaught TypeError: e is not a function from getAccounts() + web3 1.0.0-beta.37 + truffle + React Dapp
I am creating my first Dapp by using web3 1.0.0-beta.37 and trufflfe
While getting the accounts in app.js by using ganache-CLI and Metamask, I am getting following error.
Uncaught TypeError: e is ...
0
votes
1answer
28 views
Contract [Contract's name] not found on network ID: 5777
I am using truffle with drizzle.
In the contract folder I provide a file that includes two contracts
A that is a factory contract and
B that is created through one of A's functions
After compiling ...
1
vote
2answers
66 views
Correct Contract Abstraction in Truffle
I am new to Solidity and tried to write a contract. Now for better developing reasons I made myself a setup with truffle. Previously I used to work with remix only. My Project contains multiple ...
0
votes
0answers
22 views
Can't resolve 'react' after installing additional dependencies to truffle react box
I am using a truffle box react - after truffle unbox react everything works fine
Later however, after yarn add @material-ui/core
I get an error: Can't resolve 'react'
The same happens after ...
