Questions tagged [solc]
Questions related to the compiler for Solidity: solc
237
questions
0
votes
0answers
17 views
Why do solc v0.4.17 and v0.4.18 behave differently with the allow-paths primitive?
Here's an example contract:
Nobody.sol
pragma solidity ^0.4.17;
contract Nobody {
function die() public {
selfdestruct(msg.sender);
}
}
The solc JSON specification to compile the ...
0
votes
1answer
12 views
Compilation Eror: One contract accessing the variable of another contract
I am trying to compile two contracts. I am getting 'balance' variable error in "HoneyPotCollect.sol" contract. Is balance not a global contract variable? Somebody please guide me how to ...
-1
votes
1answer
14 views
Trying to compile running: 'node compile.js', but get error: “assert.js:399 throw err;” [Udemy 'Complete Developers Guide' Course]
This is my hands on contract with this Udemy Course - Ethereum-and-solidity-the-complete-developers-guide
This is the contract file, which contains two contracts - Campaign and FactoryCampaign. I ...
0
votes
1answer
26 views
Truffle and Buidler are compiling to very different bytecodes despite having same compiler settings
Truffle is giving > 24kB and out of gas errors, but Buidler is not. I have checked the number of characters in the 'deployedBytecode' of the JSON:
Buidler 33k characters (so 16.5kB)
Truffle 55k ...
0
votes
1answer
151 views
…is an abstract contract or an interface and cannot be deployed
I don't have any programming language experience. But i'm interested to learn how to create my own ERC20 token and it was sucessfully deployed without any error using remix ethereum. But, once i'm ...
0
votes
2answers
20 views
.json files for contracts are not created
I am really new in ethereum and solidity and I am having hard time to figure out how to get the .json equivalent for contracts.
I have the Campaign.sol inside the contractsFolder. The Campaign.sol ...
2
votes
1answer
16 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
1answer
50 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
25 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
33 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
17 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
57 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
39 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
46 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
231 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
57 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
114 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 ...
2
votes
1answer
151 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
673 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
33 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
84 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
38 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
159 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
92 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
13 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
20 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
19 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
75 views
1
vote
0answers
54 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
173 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
186 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
58 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
527 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
58 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
306 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
61 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
30 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
75 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
161 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
125 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
99 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
76 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
201 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
457 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
248 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
35 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 ...
1
vote
1answer
54 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
96 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
588 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):
│ app.js
│ ...
