Here's my contract.
// SPDX-License-Identifier: MIT
pragma solidity >= 0.7.3;
contract terceiroTest {
// We pass and old String, a new string and when this event is
// broadcast everybody is able to see that the even happened.
// and see the strings exposed too.
event UpdatedMessages(string oldStr, string newStr);
string public message;
// When this contract is deployed we require an argument passed called initMessasge
constructor (string memory initMessage) {
message = initMessage;
}
function update(string memory newMessage) public {
string memory oldMsg = message;
message = newMessage;
emit UpdatedMessages(oldMsg, newMessage);
}
}
and it gives me the error:
I've tried to find any kind of description about this error, even changed solidity's version. I'm studying about smartcontracts still, if someone having or had the same error I would apretiate for enlighting me. Thanks.
I have had similar problems and they all resolved by themselves. It is possible that there is no issue in your code and the issue is with etherscan.
Here are a few things I recommend to triage:
Submit again
Give gap between submission and verification
Try a different env like polygonscan.
Manually submit from their UI.
I took your contract and tested it in my hardhat env. Everything worked fine. Maybe there's something else happening in your local setup?
Try again with a fresh hardhat setup. Try using this 'badass hardhat setup' https://github.com/mistersingh179/badass-hardhat-setup
I used that setup as a clean slate, started my localhost chain, and then connected that to my sidekik interface to test the functions. Your code works fine. Example here:
Related
I've got a Chainlink client contract which makes a DirectRequest to an oracle. The oracle does its thing and then returns the answer via the typical callback selector passed in via the ChainlinkRequest. It all works well, but I'd like to write some tests that test the callback implementation
My client contract is as follows:
contract PriceFeed is Ownable, ChainlinkClient {
function updatePrice() onlyOwner returns (bytes32 requestId) {
// makes Chainlink request specifying callback via this.requestCallback.selector
}
function requestCallback(bytes32 _requestId, uint256 _newPrice) public
recordChainlinkFulfillment(_requestId) {
price = _newPrice;
}
}
The problem arises when the test code calls requestCallback(...) and the code hits the recordChainlinkFulfillment(...) modifier. The ChainlinkClient complains that the requestId being passed in by the test below isn't in the underling private pendingRequests mapping maintained by the ChainlinkClient.
The simplified version of ChainlinkClient looks like this:
contract ChainlinkClient {
mapping(bytes32 => address) private pendingRequests;
modifier recordChainlinkFulfillment(bytes32 _requestId) {
require(msg.sender == pendingRequests[_requestId], "Source must be the oracle of the request");
delete pendingRequests[_requestId];
emit ChainlinkFulfilled(_requestId);
_;
}
}
My Foundry/Solidity test is as follows:
contract PriceFeedTest is Test {
function testInitialCallback() public {
priceFeed.requestCallback("abc123", 1000000); // fails on this line
assertEq(1000000, priceFeed.price(), "Expecting price to be 1000000");
}
}
The code fails on first line of the testInitialCallback() line with: Source must be the oracle of the request
How can I trick the ChainklinkClient into allowing my callback to get past the modifier check? AFAIK I can't access and pre-populate the private pendingRequests mapping. Is there another way?
I know that Foundry provides Cheatcodes to help in testing and there's a stdstorage cheatcode, but I'm not familiar on how to construct a call to stdstorage to override pendingRequests if thats even possible with a cheatcode.
contract PriceFeedTest is Test {
function testInitialCallback2() public {
stdstore
.target(address(priceFeed))
.sig("pendingRequests()")
.with_key("abc123")
.checked_write(address(this));
priceFeed.requestCallback("abc123", 1000000);
assertEq(1000000, priceFeed.price(), "Expecting price to be 1000000");
}
}
The above code throws the following error: No storage use detected for target
Any help would be greatly appreciated. Many thanks.
When you execute the updatePrice function in your test, you should be able to strip out the requestId from the transaction receipt event. Once you have that, you can then use it in your call to requestCallback. Check out this example unit test from the hardhat starter kit for an example of this
I have a method on my contract:
function reservePlace(address _address, uint _place) public{
require(places[_place] == 0, "Place is already reserved");
userIds[_address] = lastUserId;
places[_place] = lastUserId;
lastUserId += 1;
}
and it works perfectly on truffle, I can execute it and works well
but when I use web3 and I pass:
contract.methods
.reservePlace("0x95f086ee384d54a056d87dC8A64E354cC55E2690", 1)
.call();
it doesn't do anything, also it doesn't show any error. Other methods work fine when I use them with web3 so web3 setup is correct. How can I solve it?
This is because you are calling data from the blockchain instead of sending it. In order for it to work, you should call:
contract.methods.reservePlace("0x95f086ee384d54a056d87dC8A64E354cC55E2690", 1).send({from:'your authorized address'});
I have a separate function openTrading()
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
}
This was working fine few days ago. Now it is failing, debugging in JVM reveals it is failing at
_uniswapV2Router.factory()
Error:
The transaction has been reverted to the initial state.
Note: The called function should be payable if you send value and the value you send should be less than your current balance.
I am completely lost, no idea why something that was working earlier now failing. To test this, I copied old deployed contract and it failed exact same place.
Could someone please suggest me how to resolve this issue?
I want to use Oraclize in Remix, to test it. I'm too stupid to use their examples.
How can I make this work?
From their Github I took the YouTube-Views code and copied it into Remix
pragma solidity >= 0.5.0 < 0.6.0;
import "github.com/oraclize/ethereum-api/oraclizeAPI.sol";
contract YoutubeViews is usingOraclize {
string public viewsCount;
event LogYoutubeViewCount(string views);
event LogNewOraclizeQuery(string description);
constructor()
public
{
update(); // Update views on contract creation...
}
function __callback(
bytes32 _myid,
string memory _result
)
public
{
require(msg.sender == oraclize_cbAddress());
viewsCount = _result;
emit LogYoutubeViewCount(viewsCount);
// Do something with viewsCount, like tipping the author if viewsCount > X?
}
function update()
public
payable
{
emit LogNewOraclizeQuery("Oraclize query was sent, standing by for the answer...");
oraclize_query("URL", 'html(https://www.youtube.com/watch?v=9bZkp7q19f0).xpath(//*[contains(#class, "watch-view-count")]/text())');
}
}
When I use the viewCount it returns:
0: string:
This happens with all the other examples aswell.
With WolframAlpha eg. I also get the following error:
transact to WolframAlpha.update errored: VM error: revert.
revert The transaction has been reverted to the initial state.
Note: The constructor should be payable if you send value. Debug the transaction to get more information.
Ok you don't see the answer like a normal result in Remix:
You have to go under settings and open the Oraclize plug in.
If you then deploy the contract and or click update, you get the result shown in the plug in.
I'm doing an experiment with wxWebConnect test application, incorporating the xpcom tutorial at "http://nerdlife.net/building-a-c-xpcom-component-in-windows/"
I adapt MyComponent class as necessary to compile together with testapp.exe (not as separate dll), and on MyApp::OnInit I have the following lines:
ns_smartptr<nsIComponentRegistrar> comp_reg;
res = NS_GetComponentRegistrar(&comp_reg.p);
if (NS_FAILED(res))
return false;
ns_smartptr<nsIFactory> prompt_factory;
CreateMyComponentFactory(&prompt_factory.p);
nsCID prompt_cid = MYCOMPONENT_CID;
res = comp_reg->RegisterFactory(prompt_cid,
"MyComponent",
"#mozilla.org/mycomp;1",
prompt_factory);
Those lines are copied from GeckoEngine::Init(), using the same mechanism to register PromptService, etc. The code compiles well and testapp.exe is running as expected.
I put javascript test as below :
try {
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
const cid = "#mozilla.org/mycomp;1";
obj = Components.classes[cid].createInstance();
alert(typeof obj);
// bind the instance we just created to our interface
alert(Components.interfaces.nsIMyComponent);
obj = obj.QueryInterface(Components.interfaces.nsIMyComponent);
} catch (err) {
alert(err);
return;
}
and get the following exception:
Could not convert JavaScript argument arg 0 [nsISupport.QueryInterface]
The first alert says "object", so the line
Components.classes[cid].createInstance()
is returning the created instance.
The second alert says "undefined", so the interface nsIMyComponent is not recognized by XULRunner.
How to dynamically registering nsIMyComponent interface in wxWebConnect environment ?
Thx
I'm not sure what is happening here. The first thing I would check is that your component is scriptable (I assume it is, since the demo you copy from is). The next thing I would check is whether you can instantiate other, standard XULRunner components and get their interface (try something like "alert('Components.interfaces.nsIFile');" - at least in my version of wxWebConnect this shows an alert box with string "nsIFile".
Also, I think it would be worth checking the Error Console to make sure there are no errors or warnings reported. A magic string to do that (in Javascript) is:
window.open('chrome://global/content/console.xul', '', 'chrome,dialog=no,toolbar,resizable');