Questions tagged [solc]
Questions related to the compiler for Solidity: solc
232
questions
2
votes
1answer
8 views
abi.decode() and unused variables
I am decoding bytes as the following:
// Decode Solidity tightly packed arguments
(uint8 _, uint128 stakeId, address behalf) = abi.decode(userData, (uint8, uint128, address)); // solhint-...
0
votes
0answers
19 views
How can I get the ABI from solc.compile? (^0.6.4)
In pragma solidity ^0.6.4;
I wrote a contract and can get the byte code as follow:
const solc = require("solc");
const path = require("path");
const fs = require("fs");
const inboxPath = path....
1
vote
1answer
15 views
How to pass constructor parameters to solc?
I'm trying to compile a Smart Contract to bytecode using solc.
I'm on a Ubuntu VM so I have to rely on a simple-to-install cmd line application.
Compilation works fine but it seems like I can't pass ...
0
votes
2answers
25 views
How to deploy multiple compiled solidity with web3?
So I have this codes
const MultiSigWalletFactory = fs.readFileSync(path.resolve(__dirname, "MultiSigWalletFactory.sol"), "utf8");
const Factory = fs.readFileSync(path.resolve(__dirname, "Factory....
0
votes
2answers
15 views
Does solidity create unique outputs every time it compiles same exact code?
Is there any difference if I compile everytime I want to deploy another multisig wallet.
Or I can just deploy another multisig wallet using the same compiled data?
1
vote
1answer
36 views
converting keccak from old version: pragma solidity 0.4.19; [duplicate]
I am trying to compile following code:
pragma solidity 0.5.9;
contract test{
//https://github.com/ethereum/solidity/issues/3469
address payable owner;
mapping (address => bool) pd;
uint public sS;...
1
vote
0answers
12 views
Truffle compiler stuck at 0.4.17
Coming from here: How do I specify a different Solidity version in a Truffle contract?
I still have the same issue, except that even after trying all of the suggested solutions, and even having the ...
1
vote
1answer
38 views
Transaction does not get mined on rinkeby
so I'm trying to deploy my first contract on rinkeby using web3 and truffle/hdwallet-provider.
even with different gas prices it doesn't get mined.Please help out.
const HDWalletProvider = require("@...
1
vote
1answer
222 views
Getting Error while compiling: Stack too deep
Here is my code i have array not 16 variables in a function please help where i am wrong.
struct Escrow {
bytes16 contractID;
uint256 sellingTokenAmt;
uint256 feeAmtInSellingToken;
...
2
votes
1answer
25 views
truffle version and solcjs --version returns different versions
I want to change solc version on my system(downgrade from 0.5.16 to 0.4.17). I tried uninstalling it with
npm -g uninstall solc
and then installed with
npm -g install solc@0.4.17
but it does not ...
0
votes
1answer
70 views
Using the correct/best solc version with Truffle and general tooling setup
I haven't worked with Truffle/Solidity for a while and I am trying to get my environment/toolchain configure correctly. I have some questions regarding the compiler config.
I was originally not ...
1
vote
1answer
75 views
solc-v0.6.0: TypeError: Operator - not compatible with types tuple() and int_const 1
I am having this error on solc version 0.6.0.
Basically I am returning length of the list and subtract 1 from it, where that value will be assigned to an uint variable.
In general this command used ...
1
vote
2answers
317 views
Install Old Solc Compiler Versions
I would like to compile older versions of solc contract source code using a solc compiler on my local machine. Is there a website from which to download old solc compilers?
Google revealed a GitHub ...
1
vote
1answer
28 views
Are there any risks of undefined behavior when calling a function which doesn't return anything using a prototype of it which returns bool?
According to the ERC-20 Token Standard, functions transfer and transferFrom should return a boolean value indicating success or failure:
interface IERC20Token {
function transfer(address _to, ...
0
votes
1answer
53 views
How do I install Go-ethereum and solidity on Debian10
I am using debain on wsl and I want to install ethereum and solidity for blockchain development but I am not able to find an exact way to do it.
0
votes
0answers
32 views
Solc Compiler related Error in Nodejs
I have almost 800 .solc files of version ^0.5.12 (i am using also 0.5.13 compiler version), when i all give them to my input, to compile with following code;
var walk = function (dir) {
var ...
1
vote
1answer
98 views
what is 'UnimplementedFeatureError: Not yet implemented - FixedPointType' error?
what is 'UnimplementedFeatureError: Not yet implemented - FixedPointType' error in solidity while compiling through truffle ?
How to fix it ?
Using solidity compiler version - 0.5.9
0
votes
1answer
61 views
Why does solc output bytecode that is not in valid hex format?
I compile my solidity file using the following command:
solc Encoder.sol --bin --abi --optimize -o <output_dir>/
Then I try to deploy it in Geth:
Encoder = eth.contract([<abi file content&...
0
votes
0answers
12 views
What is EVM15 as a Solidity output target?
In the Solidity compiler help menu solc --help, I noticed that evm15 is one of the new compilation targets in addition to evm and ewasm. I know what ewasm stands for, but what's the difference between ...
1
vote
1answer
12 views
How to type cast fixed size byte arrays in solc 0.5.x?
In solc 0.4.28 I was able to do:
uint foo = 42;
bytes28 bar = bytes28(foo);
but in 0.5.9 I'm getting the error:
TypeError: Explicit type conversion not allowed from "uint256" to "bytes28".
...
1
vote
1answer
15 views
BrowserSolc not defined
I'm trying to use BrowserSolc in my dApp, but it's just not loading, it seems. I've got browser-solc.min.js in the same folder as index.html, with the following near the top of the page:
<script ...
3
votes
1answer
64 views
1
vote
0answers
52 views
Cannot execute contract in non-intaractive scripts
I want to deploy and to execute ERC-20 contract on geth with non-interactive scripts. But, it seems that non-interactive scripts and console shows different results.
Enviroment
ubuntu 18.04(docker ...
4
votes
1answer
131 views
VS code Expected identifier, got 'LParen'solc
I keep getting this error/warning on my vscode when I emit events and build constructors.
or
After a bit of googling I understand it is something about my compiler, since solc <0.4.18 does not ...
0
votes
1answer
147 views
Solidity Error: Cannot destructure property `interface` of 'undefined' or 'null'
I've got his error in Solidity when compiling my test file:
TypeError: Cannot destructure property interface of 'undefined' or 'null'.
I know it is related to my compile.js file, but what is ...
1
vote
0answers
57 views
How to achieve inheritance support using web3j wrapper?
I have two types of smart contracts. One parent contract to store the type and other child contracts which inherits the parent contract.
The problem is, I can't generate java wrapper class (...
5
votes
2answers
344 views
Using two solc versions within the same truffle project
I am creating an app that has various imports that require two different versions of solidity. AragonOS(0.4.x) and openzeppelin(0.5.x)
Of course, there are breaking changes in 0.5.x so my question is ...
0
votes
2answers
52 views
Store/retrieve data doesn't work using node
i trying something simple, store and retrieve a data in a smart contract, but when i want to retrieve the data, nothing is returned.
solc version is 0.4.24
web3 version is 1.2
Solidity code:
pragma ...
1
vote
0answers
276 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
49 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
29 views
compile_files gives errror for given path of the contract [duplicate]
pragma solidity ^0.5.1;
import "./Owned.sol";
contract Greeter is Owned {
bytes32 public greeting;
event GreetingChange (
address indexed changer,
bytes32 indexed _from,
...
1
vote
0answers
49 views
Gas usage difference between Remix and Ganache/public networks
I'm trying to integrate a contract into a front end with MetaMask and getting different gas amounts depending on the network and compile options I use.
Remix ("Enable Optimization" checked): 90,410
...
1
vote
1answer
120 views
How to call a contract function that alters blockchain state on geth console
It should be easy, but I'm having a hard time using a simple smart contract described in the Solidity language reference called SimpleStorage. It only as one attribute, a setter and a getter, and I'm ...
2
votes
1answer
104 views
solcx compile_files Key error
I am using python package py-solc-x for compiling the smart contract.
os.path.abspath("D:/new.sol")
Gives path where my test contract exits. 'D:\\new.sol'
Then i use compile_files to compile the ...
0
votes
0answers
96 views
Why am I getting the error "Expected pragma, import directive or contract/interface/library definition?
I have "pragma solidity ^0.5.9" at the start of the file yet I still get this error.
Listing.sol:1:1: ParserError: Expected pragma, import directive or contract/interface/library definition.
...
0
votes
1answer
62 views
extract address of used library
Is there anyway or method to extract the address of a linked library from the contract bytecode (not a verified contract code) or deployment transaction?
my question is about step 3:
step 1. ...
0
votes
2answers
152 views
Solc complier error “TypeError: Cannot read property 'TestToken.sol' of undefined”
I set up a contract with three files referring to Token Factory.
I make a test on remix online tool, they can be successfully compiled.
when I'm tring to compile them by solc module in a .js file, ...
1
vote
2answers
374 views
Can't deploy contract with web3.js and ganache-cli
I'm using the solc module to compile a Solidity contract. The compilation step looks to be working correctly, however, when I attempt to deploy the contract to the Ganache network (in a Mocha test), ...
2
votes
1answer
186 views
Importing .sol files from an node_modules folder
Did i miss something in configuration, or will this be fixed in an future version?
Best regards
# ls -al
Makefile
README.md
build
cmd
contracts
node_modules
package.json
# ls -al ./contracts
Wallet....
1
vote
0answers
33 views
What is the value range of the parameter optimize-runs when running the solidity compiler?
I would like to know what the allowed value range of the parameter optimize-runs is when running the Solidity compiler. I didn't find the answer in the official document of Solidity.
2
votes
0answers
36 views
How to verify a contract in etherscan older than 0.4.11?
It seems that the verification feature of Etherscan supports contracts written since Solidity 0.4.11.
I want to verify a contract written with Solidity 0.4.8. Is this possible?
I'm wondering if this ...
0
votes
0answers
117 views
Compile two .sol file with solc
I'm trying to compile two different sol file with 1 smart contract each and output the compiled code of each one in two different json file. But when i run the code the .json file return empty, i dont ...
1
vote
1answer
46 views
Why is the data from remix different from that from my computer when compiling the same contract using the same version of solidity complier? [closed]
I downloaded the 0.5.7+commit.6da8b019 version of solidity compiler, compiled an ERC20 contract locally using the compiler, and got the binary data. Then I also copied the ERC20 contract and pasted it ...
0
votes
1answer
78 views
Gas is 0 when executing CALL opcode?
I wrote a very simple smart contract like this:
contract Test{
function test1(address payable addr, uint256 value) payable public {
addr.transfer(value);
}
}
And I compiled it using ...
0
votes
2answers
516 views
Solc error invalid opcode, but works in truffle
I am trying to compile solidity code in solc(nodejs) but unsuccessful so far.
I have created a sample app for demo.
Here is sample's directory structure (node.js and truffle combined):
ā app.js
ā ...
2
votes
2answers
479 views
invalid opcode “0x1c” during smart contract method execution
I have written a smart contract to test event from java project using web3j
I have prepared the web3j wrapper java class using solc compiler version
"0.5.7+commit.6da8b019.Linux.g++"
I am using a ...
3
votes
1answer
743 views
Timeout exceeded during the transaction confirmation process
I am trying to figure out the right syntax for solc 0.5.7 and web3 1 beta 52
Follow my source code:
contract.sol
pragma solidity ^0.5;
contract Hello {
string public message;
constructor (...
1
vote
3answers
176 views
Truffle and Remix compiles differently
I have a smart contract that outputs a different bytecode when compiled with truffle, and with remix, even though both seem to use the same compiler version: 0.5.7+commit.6da8b019 Is that a known ...
0
votes
1answer
100 views
I have written a javascript code for compiling the solidity code but it's showing error
I was trying to compile my contract using solc compiler but it returning me some errors. I will place my solidity code along with the error that I am getting here. Please help me out to sort this ...
1
vote
1answer
123 views
Cannot deploy contract
I'm having difficulty deploying a solc-compiled contract to ganache test network using web3.
package.json
{
"name": "smartinvoice",
"version": "1.0.0",
"description": "",
"main": "index.js",
...
