Questions tagged [remix]

Questions about Remix, an online browser compiler for Solidity, formerly called Browser Solidity.

420 questions with no upvoted or accepted answers
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8
votes
2answers
727 views

TestRPC and Metamask: hanging on pending transactions

I'm using Remix and connecting to Testrpc via Metamask. I can successfully launch contracts to testrpc, but then it hangs on the subsequent calls that Remix makes to the public methods (Remix says "9 ...
6
votes
0answers
56 views

String Input of three numbers (comma seperated) doesn't work in Remix

So when I try to put in three numbers as a String in a usual setter-method, it doesn't work. Does anybody know why? function test(string memory x) public view returns(string memory){ return x; }...
6
votes
4answers
3k views

“Mock compiler : Source not found” Error in Remix online IDE

I haven't been able to compile any solidity code because of this error. How do I solve this problem?
4
votes
1answer
312 views

Remix + Ganache - Cannot call one contract from another

I have an innocent looking contracts that work painlessly in Remix. Test contract can easily call Another if I use JavaScript VM in Remix. I also have ganache-cli running on port 7454. If I connect ...
4
votes
0answers
420 views

Event and/or watch does not work

I have a contract for a simple bidding scenario as below: pragma solidity ^0.4.9; /* Contract accepting biddings during 30 minutes */ contract SimpleBidding { address contractOwnersAccount; ...
4
votes
0answers
293 views

Gas cost for bigInt library

I am working on a big integer library in the online compiler. Currently having gas/computational time issues with the modulus function. I first implemented it using repeated subtraction: function ...
3
votes
0answers
22 views

Remix debugger ignores breakpoint

Description of issue I'm trying to debug a simple contract using remix on chrome v. 65 on Ubuntu. I must be doing something wrong, because I have the following issue: When I place a breakpoint in ...
3
votes
1answer
59 views

How to use enums for conditions on constructor?

I am learning to code with solidity. need help to solve this I have a membership system where users can have basic, gold, diamond membership types. Users can use coupons every 5 minutes and for basic ...
3
votes
2answers
79 views

Format of Event logs structure in Remix

I am running a simple contract in remix. I have an event in my contract which will be emitted just to check values of stateVariables. contract stateVariable{ uint stateVariable1=10; uint ...
3
votes
1answer
137 views

Web3JS incorrect return value

When I return a string array with web3 I don't get the original array as expected, but rather I get an array of the same size, with the index off by one. So instead of ["One","Two","Three"] I get ["",...
3
votes
0answers
159 views

Difference between execution costs on remix an Ganache?

I created a contract on remix and then deployed it. when I call any function there is an execution cost in gas. I also deployed the same contract on Ganache for testing. I find the execution cost in ...
3
votes
1answer
200 views

Deploying contract via Remix

I was just recently going through programtheblockchain.com posts which are really helpful in terms of learning. I am currently struggling to deploy Token Market Contract (https://...
3
votes
0answers
131 views

Solidity : About function calls between deployed contracts

I want to make a function call between a token (MyToken.sol) that inherits MintableToken.sol of OpenZeppelin and manipulate that token (Buy. Sol). (MyToken.sol) pragma solidity ^0.4.21; import "...
3
votes
0answers
486 views

Why the transaction reverted?

Try to run my contract in remix JavaScriptVM and faced with error. Contract code: ... /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract ...
3
votes
0answers
198 views

Contract creation from another contract succeeds, then fails?

I have a first contract with some very basic functionality : contract ContractA { uint public supplyA; function ContractA (uint _supply) { supplyA = _supply; } function ...
3
votes
1answer
595 views

How to connect to testrpc from another machine local network?

I have a testrpc running on a machine but I want to connect the Remix IDE to it which is on another machine. I can connect to the testrpc with Remix IDE if both are on the same machine. Tried with ...
3
votes
0answers
117 views

Contract works fine in Solidity-browser but not against private node

I have been testing a contract using the Solidity Browser, but when I deploy the same contract on my private node, it doesn't seem to work the same as in the Solidity Browser. I have tried manually ...
3
votes
0answers
87 views

Solidty Browser doesn't load properly

Solidity Browser doesn't load anymore. Here is a screenshot with the Chrome Developer open. on Chrome Version 52.0.2743.116 m It's stuck on loading and I see in developer some error messages. It ...
3
votes
0answers
156 views

In Browser-Solidity, I want to see the messages sent by a contract

There is good information on this site about writing and ad-hoc testing a contract in Browser-Solidity. When I use the transaction tab to create my contract and invoke its public functions, I want to ...
3
votes
1answer
551 views

How do I connect to the Remix JavaScript VM from my front end

I have been developing using Remix and Metamask but it's a slow progress when pushing to the test networks. I have switched to the JS VM in Remix but I am not sure about how to connect my frontend to ...
2
votes
0answers
37 views

deploying Solidity contract in Remix

I am trying to deploy Solidity contract in Remix for my study purpose. However, I failed to deploy SmartMesh contract in Remix (below, I attach the link for the code): https://etherscan.io/address/...
2
votes
0answers
23 views

Name Styling Best Practices Internal/External variables/functions etc

The solidity docs clearly specify how to style function order, types etc. However, are there an appropriate way to also separate between internal/external variables, functions etc. I see some people ...
2
votes
1answer
101 views

Remix + Metamask: The method personal_sendTransaction does not exist

I'm trying to deploy a contract to the Rinkeby Test Network through Remix and Metamask. Metamask seems to be properly configured: However, at Remix Run tab, the address dropdown shows no accounts: ...
2
votes
0answers
42 views

Why I can't use two functions with same name, but different parameters

I have a function which returns address but it gives me error if I try to read it. I'll explain by a quick example: Solidity: contract TestOneReturn { mapping(uint => uint) m_Data; ...
2
votes
0answers
54 views

How to get v,r,s parameters from transaction receipt in remix ide?

I am trying to get v,r,s parameters of a transaction so that I can use them to verify the signature. I am not sure but I think previously remix used to give these parameters in transaction receipt. I ...
2
votes
1answer
31 views

How to implemet condition for constructor?

Looking to learn solidity so need your support for this I have made a constructor in my contract where maxAvailableNumber = 1; What I want to do is if the balance of user is more than certail limit ...
2
votes
1answer
174 views

Call a payable contract's function from another contract via an interface

I have two contracts, they are connected via an interface. When user calls contract1 function, it uses an interface to call contract2 function which updates it's storage. My problem is that I can ...
2
votes
1answer
40 views

How to get the return type of a function of an already deployed contract?

I am currently working on a real estate blockchain project. Now I have 2 contracts user.sol and property.sol. The person who is registered on the website through user.sol can only buy or sell property ...
2
votes
1answer
60 views

Ethereum Smart Contract deployed token not showing

pragma solidity ^0.4.24; contract owned { address public owner; function owned() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); ...
2
votes
1answer
294 views

Remix: Gas required exceeds allowance or always failing transaction

I have a contract which has transferFrom function mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; mapping (address => bool) public ...
2
votes
1answer
180 views

Remix + Metamask not fetching any values

I have a simple test contract that stores a hash and I deployed it via Remix and Metamask pragma solidity 0.4.25; contract Hash { bytes32 hash; constructor(bytes32 _hash) public { ...
2
votes
0answers
450 views

Contract too large

I am sure this has already been answered but I could not find a clear answer. I get the following error: Contract creation initialization returns data with length of more than 24576 bytes. The ...
2
votes
1answer
25 views

Contract - Demo - Identifier - Only 3 Lines for my contract to work - ¿does somebody know how to fix this?

pragma solidity ^0.4.23; contract Owned { address owner; function owned() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); ...
2
votes
2answers
308 views

Error when running Truffle Test in Terminal

I am trying to use truffle to test my smart contracts and have written some test files. I am getting an error on the terminal trying to run the test and am unsure what the reason is. I access my ...
2
votes
1answer
176 views

Contract working on Javascript VM and not Web3 Provider, why?

Here is the code: Calling contract: pragma solidity ^0.4.24; contract Caller { address public called_address; constructor() public payable { } function set_address(address _addy)...
2
votes
0answers
61 views

Estimated gas is always low

web3.eth.estimateGas is always calculating low gas for the transaction. Here is a reference to a trasaction in ropsten. https://ropsten.etherscan.io/tx/...
2
votes
0answers
234 views

Getting Json file from remix

I have been deploying contracts on rinkeby but we are almost done to go to mainnet. I have been comparing deployments with truffle and remix and there is a huge difference in gas uses, so I would ...
2
votes
2answers
917 views

Gas estimation failed in Remix

Can't really use the transfer function as it is written. It assumes the owner uses it. So made a new function for the "minting" function for the faucet to use. Not sure why the compiler message is so ...
2
votes
0answers
62 views

Gas Estimation Failed for Airdrop for sending Tokens to Multiple Addresses using Remix

I have deployed a Crowdsale contract and now I need to send my Tokens to a list of addresses using remix and injected web3. I am using below code for Airdrop but when I send tokens to multiple ...
2
votes
1answer
115 views

remix: The method debug_traceTransaction does not exist/is not available

I have followed this answer. So, you just need to add the --rpcapi "eth,net,web3,debug" command line option. The way I run my geth: geth --datadir /home/user/POA/private --rpcaddr 127.0.0.1 --...
2
votes
0answers
240 views

How to set gas price in Remix IDE?

I'm testing my contract on Ropsten network. For this i've launched geth in docker: > command: --verbosity 4 -rpc --ipcdisable --rpcaddr "0.0.0.0" --rpccorsdomain "*" --syncmode "fast" --rpcapi="...
2
votes
0answers
80 views

Input data into remix through javascript

I am trying to update and call data to remix using node js. I have the temperature captured in my js code and I am trying to call it using the updateWeather function. Node.js code let request = ...
2
votes
0answers
282 views

Can you deploy a contract from a Ledger Nano S using Remix?

I have deployed a contract from a Ledger Nano S before by connecting to MEW and deploying using Bytecode and ABI of the contract. However I do not know what compiler version MEW used and so cannot ...
2
votes
1answer
138 views

Ether balance on Metamask doesn't change after selling tokens

I create a smart contract successfully using Remix IDE , Metamask and Ropsten for testing. I want to sell some tokens using Sell function, so I specified the value "20" for Sell function ,my initial ...
2
votes
1answer
851 views

Remix error “gas required exceeds allowance or always failing transaction” on private blockchain

I'm trying to test contract interaction using Remix with two basic contract: contract Callee contract Caller Callee function/variable: uint[] public values; function storeValue(uint value) { ...
2
votes
0answers
978 views

Invalid asm.js: Invalid member of stdlib when loading Remix IDE

When I try to load the remix ide on browser I'm getting the following on the console of the browser Loading https://solc-bin.ethereum.org/bin/soljson-v0.4.21+commit.dfe3193c.js without worker ...
2
votes
1answer
201 views

call graphs for solidity smart contracts

Do we have some open source tools where we can get call graphs for solidity smart contracts execution ? For ex: Suppose Function A in contract C calls some other function B so the graph should contain ...
2
votes
0answers
115 views

Solidity libraries with public visibility

Suppose I have the following Contracts and a Library: pragma solidity ^0.4.21; library UserLib { function insertUser(address dbAddr, bytes32 user) public { DB(dbAddr).setUser(user); } } ...
2
votes
0answers
245 views

Create a child contract from parent contract via remix

I was trying to create a new contract from another one like this: pragma solidity ^0.4.8; contract Child { address public owner; function Child() public { owner = msg.sender; } }...
2
votes
1answer
3k views

How to fix “invalid argument 0: json: cannot unmarshal hex number with leading zero digits into Go struct field CallArgs.value of type *hexutil.Big”?

Using Remix and metamask, I have deployed a contract on the rinkeby network that contains a function that, when called will send unsold tokens to a specific address. The code for it is like this ...

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