Questions tagged [compiler]
A compiler is a computer program that translates a higher-level programming language into a lower-level language. For example: Solidity is compiled into EVM opcodes.
176
questions
0
votes
0
answers
15
views
Compiler version error in Visual Studio Code
I started getting this error...
Source file requires different compiler version (current compiler is 0.7.3+commit.9bfce1f6.Emscripten.clang) - note that nightly builds are considered to be strictly ...
- 538
0
votes
0
answers
8
views
Why do I have two versions of Truffle compiler on my computer?
I am using VS Code to compile Solidity code. When I do truffle -v in Mac terminal, it shows Solidity v0.5.16 (solc-js). When I do truffle -v in my firstProject folder, though, it shows Solidity - 0.8....
- 1
0
votes
0
answers
21
views
Having trouble finding and uninstalling local solc versions to enable solc-select
Years ago, I used Homebrew to install ethereum and solidity. Lately, I've been trying to use solc-select, but as its documentation states, it doesn't work when there's a local copy of solc already ...
1
vote
1
answer
14
views
Compiler doesn't show a warning if empty function is not marked as pure
When compiling a function without marking its state mutability as pure, the compiler shows the following warning:
Warning: Function state mutability can be restricted to pure
For example:
contract ...
- 451
1
vote
1
answer
31
views
How to disable log that when compile?
I using script "yarn hardhat compile" alway log like image. I want to disable that.
- 13
1
vote
1
answer
18
views
developing a contract that distributes tokens
I am developing a contract that distributes tokens and has already implemented the main functionality. The contract accepts tokens from the owner and distributes them by 1KK to each address from the ...
- 127
1
vote
1
answer
49
views
Get bytecode offset(entrypoint) for the function in solidity contract
Suppose, I have the following source code:
contract Test {
function add(uint a, uint b) public returns(uint) {
return a + b;
}
}
And bytecode after compilation:
...
- 11
1
vote
1
answer
41
views
I do not understand how to fix the error: "req.add"
// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import "@chainlink/contracts/src/v0.8/ChainlinkClient.sol";
contract RealEstateDataConsumer is ChainlinkClient {
uint256 ...
1
vote
1
answer
45
views
Compilation is successful but getting bytecode = "0x"
I am trying to compile this very simple smart contract but I am getting its bytecode = "0x":
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
import "@openzeppelin/...
- 538
2
votes
1
answer
147
views
Adding viaIR: true option Brownie
I'm getting
CompilerError: Stack too deep. Try compiling with `--via-ir` (cli) or the equivalent `viaIR: true` (standard JSON) while enabling the optimizer. Otherwise, try removing local variables. ...
1
vote
1
answer
23
views
Solc: Source file requires different compiler version
in my brownie project i have imported LinkTokenReceiver.sol contract which its pragma solidity is pragma solidity ^0.7.0;, which means that it requires compiler version equal or greater than 0.7.0, ...
- 298
1
vote
2
answers
236
views
Operator == not compatible with types string memory and string memory [duplicate]
function hasRole(uint256 tokenId, string memory role) public view returns (bool) {
string[] memory userRoles = tokenToRoles[tokenId];
uint256 userRolesLength = userRoles.length;
unchecked {...
- 155
1
vote
0
answers
45
views
How do I use a remapping with solidity compiler?
If my contract is importing for example "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol", how do I make it work?
I know import_remappings ...
- 11
0
votes
0
answers
21
views
Run manticore return 'Stack too deep when compiling inline assembly: Variable headStart is 1 slot(s) too deep inside the stack' error
I compile my project just fine but when I run manticore for my solidity file, it return Stack too deep error. I did some research but none of which I found work. Here is the config I'm setting:
...
- 13
0
votes
1
answer
61
views
Compiler version error
I am following a YouTube tutorial and I have the following contract (in Remix):
// SPDX-License-Identifier: MIT
pragma solidity >= 0.6.0 < 0.9.0;
import "@chainlink/contracts/src/v0.8/...
- 15
0
votes
3
answers
183
views
Contract is below size limit, but Hardhat says it's not?
When I run npx hardhat compile, Hardhat says one of my contracts is above the size limit.
But hardhat-contract-sizer says it's not.
See below:
Versions:
hardhat-contract-sizer version: ^2.5.1
...
3
votes
1
answer
1k
views
Is it possible to get the "creation bytecode" of an already deployed contract in Solidity?
I am looking to get some already deployed code working for myself.
With ethers.js I can get the bytecode in the following way
ethers.getCode("CONTRACT ADDRESS")
However, this is a ...
- 31
1
vote
1
answer
136
views
Problem with Solidity compiler
recently I started doing solidity tutorial. Everything was going okay on remix but when i switched to VS Code I got compiler error
I changed it to:
but it doesnt solve the question why 0.8.8 ...
- 11
2
votes
0
answers
26
views
Why No Constant Linking?
Similarly to library linking
https://docs.soliditylang.org/en/latest/using-the-compiler.html?highlight=compiler%20options#library-linking
why is there no constant linking for the compiler?
The only ...
- 141
1
vote
1
answer
35
views
Hi Everyone. Newbie here in solidity . I am getting the common erro "ParserError: Expected '(' but got identifier" with my code
I am getting the common error "ParserError: Expected '(' but got identifier" with my codeb.
I have tried to solve it using the existing solutions but seems my knowledge is limited, hence not ...
- 11
1
vote
0
answers
115
views
Trouble with Solidity Compiler Version when combining Aave and Openzeppelin in Foundry
I'm trying to follow this tutorial by Patrick Collins on Flashloans but in Foundry: https://www.youtube.com/watch?v=Aw7yvGFtOvI&t=328s
When in try to forge build I get the following error:
: src\...
- 21
2
votes
1
answer
186
views
How to enable multiple compiler versions in solc js?
I'm trying to compile contract A(located in A.sol) that has a dependency on contract B(located in B.sol) using solc-js,
where A has solidity version 0.8.0 and B version 0.7.6. The solcjs version that ...
- 573
1
vote
1
answer
57
views
Brownie doesnt compile but says it did
if i run brownie compile i get INFO: Could not find files for the given pattern(s). Brownie v1.19.0 - Python development framework for Ethereum
Project has been compiled. Build artifacts saved at C:\...
1
vote
1
answer
400
views
Is it possible to compile to YUL?
So the solidity compiler compiles solidity first to YUL and then to machine code. Is it possible to compile it just to YUL and look it over?
It would be really helpful to learn how YUL works.
Thanks.
- 312
1
vote
1
answer
770
views
I can not import openzeppelin, but get error 'File import callback not supported'
I get 'File import callback not supported' when I try to compile my simple solidity contract, that imports ERC721. Can anybody help?
Here is what I have already done:
I have installed openzeppelin in ...
- 11
1
vote
1
answer
589
views
TypeError: Invalid URL at new NodeError when typing the command npx hardhat run scripts/deployGoldenFoxNFT.js --network rinkeby
I run into this error when i try to run with Hardhat. Any idea of what it can be the solution? Thanks a lot in advance
- 11
0
votes
0
answers
38
views
CompilingError: Stack too deep, try removing local variables [duplicate]
I have a function that lists an NFT on a marketplace for sale. In the process, it keeps records by saving data in a struct inside nested maps represented by the NFT address and token ID. I am running ...
- 1
0
votes
1
answer
219
views
Variable declaration
I am new to solidity.Below is the snippet of solidity source code which I came across :-
pragma solidity ^0.5.1;
library SafeMath {
function sub(uint256 a, uint256 b) internal pure returns (...
- 43
1
vote
0
answers
56
views
Pure function that reads from storage, compiler bug?
I just came across this while testing around with the Diamond Storage pattern. Here is a 'pure' function that reads from storage. This had me wondering, is there actually any difference between pure ...
- 1,500
0
votes
2
answers
42
views
Remix compiler error on my last code line 187 - any solution?
My code below still popping one error on line 187 - if.... on remix.ethereum compiler - any solution?
pragma solidity ^0.4.4;
contract Token {
/// @return total amount of tokens
function totalSupply()...
- 1
1
vote
1
answer
561
views
unexpected revert behaviour using custom errors in pure function
in the code below, if a revert using the custom error inside the pure function it reverts with a different error (below). If I do the same things without pure, it reverts with the custom error as ...
- 1,128
1
vote
0
answers
32
views
Why Is My Smart Contract Not Able To Be Optimized?
I have a smart contract that is barely below the limits of the solidity compiler.
When I try to enable optimization at 200 runs I get this error:
CompilerError: Stack too deep when compiling inline ...
- 173
3
votes
1
answer
380
views
How to configure EVM in IntelliJ with Solidity plugin
There is a related question/answer from 5 years ago but back then the plugin only provided syntax highlighting.
Now, I know I can compile from the solidity file opened in IntelliJ, clicking on a play/...
- 31
0
votes
2
answers
622
views
hardhat beginner "Nothing to compile" error
following hardhat beginner tutorial.
This is how I did it,
first run "npx hardhat " command and created basic sample project. After that run following command
npm install --save-dev @...
- 1
1
vote
3
answers
131
views
Which compiler version should I use?
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "@chainlink/contracts/src/v0....
- 21
1
vote
0
answers
102
views
Truffle compiles different binary than RemixIde, even with same compiler version and evm version
The code:
pragma solidity <0.9.0;
contract Callee {
address public a;
address public b;
function test(uint256 i) public returns(uint256){
a=address(this);
b=msg....
- 241
1
vote
1
answer
34
views
Any document for the layout of the smart contract binary?
I'm trying to write a disassembler to disassemble the binary code of smart contract. There are trailing bytes at the end, which causes disassemble problem. For example, the last few lines of this ...
- 241
1
vote
1
answer
1k
views
How to complie smart contract in node.js [solc version: ^0.8.13]
I would like to complie my smart contract code at node.js. Although solc version at package.json and solidity version at smart contract code are same, it doesn't work.
complie.js
const path= require('...
- 13
2
votes
0
answers
102
views
ParserError: Expected '{' but got reserved keyword 'override' ) external override returns (bool) { ^------^
Can someone fix the code problem below?
I compile in remix.ethereum.org , it show ParserError: Expected ';' but got '}' } external override
The code:
pragma solidity 0.5.8;
/**
Ropsten instances:...
0
votes
1
answer
83
views
Learn how to use Solidity ( Error encoding arguments: Error: invalid BigNumber)
Good afternoon folks! I thank the attention !
I'm taking a Solidity course that Microsoft made available on the link
https://aka.ms/SolidityHowTo-11
pragma solidity >0.7.0 <0.8.0;
contract ...
0
votes
1
answer
64
views
ParserError: Expected '{' but got '}' I keep getting this error when I try to compile my code
I get this error every time that I try to compile my code. These curly brackets run from the beginning of my contract to the very end. I'm new to smart contracts, and this does not make much sense to ...
1
vote
1
answer
223
views
Type Error: Keyword Argument 'solc_version'
I received the following error while trying to execute a custom built web3.py
install_solc("0.6.0")
complied_sol = compile_standard(
{
"language": "Solidity",
...
- 113
1
vote
1
answer
294
views
How do I tell which solidity version eth-brownie is using to compile my contracts?
I'm not specifying a solidity version so I'm not sure which solidity version brownie is using to compile my contract.
I'm using pragma solidity ^0.8.0; so I'm not sure which version above 0.8.0 ...
- 31
1
vote
1
answer
403
views
Uniswap V2: TypeError: Explicit type conversion not allowed from "int_const -1" to "uint256"
I was trying to fork Uniswap V2 with another protocole and ran into this error while compiling the contracts: TypeError: Explicit type conversion not allowed from "int_const -1" to "...
- 233
0
votes
1
answer
1k
views
How can i deploy a smart contract with Multiple files
I am kinda new to this space. I just deployed my first smart contract to the BSC using Remix IDE. Now I used the very simple contract templates most online tutorials have always used. It is just a ...
- 1
0
votes
0
answers
123
views
I am trying to print out the variable (compiled_sol), so I can deploy my smart contract, but I keep running at this error
INFO: Could not find files for the given pattern(s).
Traceback (most recent call last):
File "C:\Users\jethr\demos\web3_py_simple_storage\deploy.py", line 8, in <module>
...
0
votes
1
answer
1k
views
ParserError: Source file requires different compiler version
I am a beginner working on brownie using vscode related to a lottery smart contract. Please don't mind if I am doing any rookie mistakes I am still trying my best to understand it as much as I can :) ...
2
votes
0
answers
130
views
Solidity array has no SLOAD optimization
Suppose a function writes to storage, and then reads from the same storage location before it has been overwritten. In solidity 0.8.11 in these cases the SLOAD gets optimized away (there is 1 SSTORE ...
- 9,988
1
vote
0
answers
183
views
TRYING TO VERIFY MY SOURCE CODE ON ETHERSCAN ErrorUnable to generate Contract ByteCode and ABI (General Exception, unable to get compiled [bytecode])
Compiler Warning(s): ParserError: Expected pragma, import directive or contract/interface/library/struct/enum/constant/function definition.
--> myc:1:1:
|
1 | "accounts": {
| ^^^^^^^^^^
...
- 11
2
votes
1
answer
39
views
Is there an EVM compiler that supports coroutines? (e.g. generator functions)
With coroutine I mean a subroutine that can be paused and resumed from another subroutine; preserving its internal state across pauses and resumes.
For example, a feature similar to:
Javascript's ...
- 9,988