Alright, thanks for the tip, I’ll go that route instead
Hey guys, I’m doing the solidity smart contract 201 and following Philip’s steps, but i’m getting an error when I try to call a contract function from the cmd on Visual Studio Code.
I can compile and migrate the code with no problems, but when I try to call some function it throw errors.
truffle(develop)> let instance = await helloWorld.deployed()
Uncaught ReferenceError: global is not defined
at evalmachine.<anonymous>:2:19
This is the error that I get when I try to get the “instance” (it should return “undifined”)
truffle(develop)> let instance = helloWorld.deployed()
undefined
But if i create the variable without the “await” it return what it should return, but when i try to call some function this error is thown:
truffle(develop)> instance.hello()
evalmachine.<anonymous>:0
instance.hello()
^
Uncaught TypeError: instance.hello is not a function
at evalmachine.<anonymous>
at sigintHandlersWrap (node:vm:268:12)
at Script.runInContext (node:vm:137:14)
.
.
.
(This is my contract)
pragma solidity 0.8.6;
contract helloWorld {
string message = "Hello World";
function setMessage(string memory newMessage) public payable returns (string memory){
message = newMessage;
}
function hello() public pure returns (string memory){
return "Hello world";
}
}
hi, i am still getting the same error message…
ParserError: Source "/C/Users/alexp/Desktop/alex/truffel/ERC20_token/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol" not found
--> /C/Users/alexp/Desktop/alex/truffel/ERC20_token/contracts/NewToken.sol:3:1:
|
3 | import "../node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol";
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation failed. See above.
Hey @Nuno_Silva
Why is the function setMessage payable?
The issue you are facing is: https://github.com/trufflesuite/truffle/issues/4238
- Make sure to have node > 12.x installed.
- Migrate your project then
const c = await helloWorld.deployed() - You will see the error “global is not defined”
- Type
global = globalThis
The issue is now fixed.
Also the team working on Truffle should soon deploy a fix for that.
I’m doing the assignment to deploy the Multisig Wallet with Truffle.
Now when i want to set the instance variable to wallet.deployed(), it says : Wallet is not defined.
What is going wrong? plz help
Terminal:
3_Multisig_migrations.js
========================
Replacing 'Wallet'
------------------
> transaction hash: 0x710c128263680f4991aa1a6dcd8169852707a958de1392aeec71924f6453b574
> Blocks: 0 Seconds: 0
> contract address: 0xeF43D967BD57662f19B6DcFDFa6cFB2cBb52F244
> block number: 15
> block timestamp: 1628689623
> account: 0xB4bA0A3c079ceE4C239b3cd4A8EdeeAb69e65464
> balance: 99.992823048
> gas used: 857299 (0xd14d3)
> gas price: 2 gwei
> value sent: 0 ETH
> total cost: 0.001714598 ETH
> Saving migration to chain.
> Saving artifacts
-------------------------------------
> Total cost: 0.001714598 ETH
Summary
=======
> Total deployments: 3
> Final cost: 0.002805456 ETH
- Blocks: 0 Seconds: 0
- Saving migration to chain.
- Blocks: 0 Seconds: 0
- Saving migration to chain.
- Blocks: 0 Seconds: 0
- Saving migration to chain.
truffle(develop)>
undefined
truffle(develop)> migrate
Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.
Network up to date.
truffle(develop)> instance = await Wallet.deployed()
Uncaught ReferenceError: Wallet is not defined
at evalmachine.<anonymous>:1:9
truffle(develop)> let instance = await Wallet.deployed()
Uncaught ReferenceError: Wallet is not defined
at evalmachine.<anonymous>:1:9
Hello I’ve run into a Problem with truffle during the lecture First migration.
Up to the migrate command everything works.
when I enter the command:
let instance = await Helloworld.deployed()
I receive uncaught instead of undefined.
truffle(develop)> let instance = await Helloworld.deployed()
Uncaught:
Error: Helloworld has not been deployed to detected network (network/artifact mismatch)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
at Function.deployed (C:\Users\edibe\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\contract\lib\contract\constructorMethods.js:83:1)
at Object.checkNetworkArtifactMatch (C:\Users\edibe\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\contract\lib\utils\index.js:247:1)
truffle(develop)>
migrate feedback:
truffle(develop)> migrate
Compiling your contracts...
===========================
> Compiling .\contracts\Migrations.sol
> Compiling .\contracts\hello.sol
> Compilation warnings encountered:
Warning: SPDX license identifier not provided in source file. Before publishing, consider adding a comment containing "SPDX-License-Identifier: <SPDX-License>" to each source file. Use "SPDX-License-Identifier: UNLICENSED" for non-open-source code. Please see https://spdx.org for more information.
--> project:/contracts/hello.sol
> Artifacts written to C:\Users\edibe\Google Drive\IOT\Programming\Truffle\helloworld\build\contracts
> Compiled successfully using:
- solc: 0.8.0+commit.c7dfd78e.Emscripten.clang
Starting migrations...
======================
> Network name: 'develop'
> Network id: 5777
> Block gas limit: 6721975 (0x6691b7)
1_initial_migration.js
======================
Replacing 'Migrations'
----------------------
> transaction hash: 0xbf7a40b154845397906c05b0367fbf68845b88bd0a65ca780290fb61e94cd5c0
> Blocks: 0 Seconds: 0
> contract address: 0x042425215b7cb406c234C966b9A6A9112956dCc5
> block number: 1
> block timestamp: 1629809996
> account: 0x7fa14C25D94ACA71799937Cd179f84c31D8c3e41
> balance: 99.9995114
> gas used: 244300 (0x3ba4c)
> gas price: 2 gwei
> value sent: 0 ETH
> total cost: 0.0004886 ETH
> Saving migration to chain.
> Saving artifacts
-------------------------------------
> Total cost: 0.0004886 ETH
Summary
=======
> Total deployments: 1
> Final cost: 0.0004886 ETH
- Blocks: 0 Seconds: 0
- Saving migration to chain.
Now the instance cant be called as shown in the Video.
“Uncaught ReferenceError: instance is not defined”
Where did I go wrong?
I am getting the following error when trying to migrate Filip’s multisig wallet contract on truffle (as part of the assignment). I was able to successfully migrate “Helloworld” so I’m not sure why there’s a problem (I followed the same exact steps). Below is the error message that I keep getting. Please help!
Error: *** Deployment Failed ***
“Wallet” – Invalid number of parameters for “undefined”. Got 0 expected 2!.
at C:\Users\jsand\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\deployer\src\deployment.js:365:1
at process._tickCallback (internal/process/next_tick.js:68:7)
- Blocks: 0 Seconds: 0
- Saving migration to chain.
Your migrations file should look similar to this:
const MultiSig = artifacts.require("MultiSig");
module.exports = function (deployer) {
deployer.deploy(MultiSig, ["0x...","0x...","0x..."], "3");
};
To find the addresses to input, type:
- accounts[0]
- accounts[1]
- accounts[2]
Into your cmd terminal and replace each “0x…” with your given addresses. The “3” above is how many approvals I wanted, so change that also to your liking.
Thanks, that worked!
for the truffle assignment:
I managed to migrate and deploy the Wallet contract.
I’m trying to interact with the functions now but when I try to interact with the createTranfer()
so I typed the folowing in the console:
truffle(develop)> instance.createTransfer(5, “0x36d098ac992fca6eee584f12d06b8968111d5dcd”)
getting me an error
Uncaught Error: Returned error: VM Exception while processing transaction: revert
by the way this is the function:
function createTransfer(uint _amount, address payable _receiver) public onlyOwners {
emit TransferRequestCreated(transferRequests.length, _amount, msg.sender, _receiver); transferRequests.push( Transfer(_amount, _receiver, 0, false, transferRequests.length) ); }
any help would be appreciated
I’ve just redone everything and I got rid of the Error.
Hey @Joey
If you worked with the final code of Filip, then the address of the payable_receiver is saved within an Array.
To send the address try to use the array
Instance.createTransfer(10, accounts[i])
But it’s important to have the addresses defined in your migration File.
i cant get the import for the erc20 coding for openzeppelin. it states this message when i compile.
Compiling your contracts...
===========================
> Compiling .\contracts\ERC20.sol
> Compiling .\contracts\Migrations.sol
> Compiling .\contracts\NewToken.sol
> Compilation warnings encountered:
|
7 | import "../../utils/Context.sol";
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
,ParserError: Source "/C/Users/alexp/Desktop/alex/truffel/ERC20_token/contracts/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol" not found
--> /C/Users/alexp/Desktop/alex/truffel/ERC20_token/contracts/NewToken.sol:3:1:
|
3 | import "./node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol";
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
i dont know why it says its “not found”, since i installed the npm install @openzeppelin/contracts
1 Like
thank you,
I tried again with Instance.createTransfer(10, accounts[1]) but i receive the same error.
How do i define those accounts addresses in the migration file please ?
Mine looks like this:
const Wallet = artifacts.require("Wallet");
module.exports = function (deployer, network, accounts) {
deployer.deploy(Wallet, [ accounts[1], accounts[2]], 2);
};
thanks in advance
Your file path might be incorrect.
Try with import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
Carlos Z
Hey @Joey, hope you are ok.
If you are getting a revert error, its because one of your require statements are being trigger, you might want to add a error message on them so you can identify which require is triggered.
Example:
require(condition, "something bad happens");
Carlos Z
Hi @thecil,
Thanks for your feedback. The function that im calling in truffle has no require statement so I’m confused with the error.
function createTransfer(uint _amount, address payable _receiver) public onlyOwners {
emit TransferRequestCreated(transferRequests.length, _amount, msg.sender, _receiver);
transferRequests.push(
Transfer(_amount, _receiver, 0, false, transferRequests.length)
);
}
This is how I call it:
let instance = await Wallet.deployed()
then
instance.createTransfer(2, accounts[3])
The error message im getting is:
Uncaught Error: Returned error: VM Exception while processing transaction: revert
here is my migration code
const Wallet = artifacts.require("Wallet");
module.exports = function (deployer, network, accounts) {
deployer.deploy(Wallet, [ accounts[1], accounts[2]], 2);
};
any idea what i’m doing wrong here please ?
1 Like
What about the transfer function? Could you please share your contract in the following way so we can have a better picture for the issue?
Carlos Z
Hi Carlos,
I’m using the final wallet code from Filip for this assignement. Here’s the complete contract contract:
pragma solidity >=0.4.22 <0.9.0;
pragma experimental ABIEncoderV2;
contract Wallet {
address[] public owners;
uint limit;
struct Transfer{
uint amount;
address payable receiver;
uint approvals;
bool hasBeenSent;
uint id;
}
event TransferRequestCreated(uint _id, uint _amount, address _initiator, address _receiver);
event ApprovalReceived(uint _id, uint _approvals, address _approver);
event TransferApproved(uint _id);
Transfer[] transferRequests;
mapping(address => mapping(uint => bool)) approvals;
//Should only allow people in the owners list to continue the execution.
modifier onlyOwners(){
bool owner = false;
for(uint i=0; i<owners.length;i++){
if(owners[i] == msg.sender){
owner = true;
}
}
require(owner == true);
_;
}
//Should initialize the owners list and the limit
constructor(address[] memory _owners, uint _limit) {
owners = _owners;
limit = _limit;
}
//Empty function
function deposit() public payable {}
//Create an instance of the Transfer struct and add it to the transferRequests array
function createTransfer(uint _amount, address payable _receiver) public onlyOwners {
emit TransferRequestCreated(transferRequests.length, _amount, msg.sender, _receiver);
transferRequests.push(
Transfer(_amount, _receiver, 0, false, transferRequests.length)
);
}
//Set your approval for one of the transfer requests.
//Need to update the Transfer object.
//Need to update the mapping to record the approval for the msg.sender.
//When the amount of approvals for a transfer has reached the limit, this function should send the transfer to the recipient.
//An owner should not be able to vote twice.
//An owner should not be able to vote on a tranfer request that has already been sent.
function approve(uint _id) public onlyOwners {
require(approvals[msg.sender][_id] == false);
require(transferRequests[_id].hasBeenSent == false);
approvals[msg.sender][_id] = true;
transferRequests[_id].approvals++;
emit ApprovalReceived(_id, transferRequests[_id].approvals, msg.sender);
if(transferRequests[_id].approvals >= limit){
transferRequests[_id].hasBeenSent = true;
transferRequests[_id].receiver.transfer(transferRequests[_id].amount);
emit TransferApproved(_id);
}
}
//Should return all transfer requests
function getTransferRequests() public view returns (Transfer[] memory){
return transferRequests;
}
}
1 Like