solc-js | Javascript bindings for the Solidity compiler | Blockchain library
kandi X-RAY | solc-js Summary
kandi X-RAY | solc-js Summary
Javascript bindings for the Solidity compiler
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solc-js Examples and Code Snippets
Lines of Code : 170License : Strong Copyleft (GPL-3.0)
Copyimport json
import web3
import pdb
from web3 import Web3, HTTPProvider, TestRPCProvider
from solc import compile_source, compile_standard, compile_files
from solc import compile_source, compile_files, link_code
from web3.contract import ConciseContr var qkc = web3.qkc;
web3.qkc.getBalance(addressHexString [, callback])
var balance = web3.qkc.getBalance("0x653EF52aa0D9f9186f3f311193C92Ed84707519C65D931d8");
console.log(balance); // instanceof BigNumber
console.log(balance.toString(10)); // '1 import Web3 from 'web3';
import solc from 'solc';
import { ContractFactory } from 'ethereum-contracts';
const web3 = new Web3(/* connect to running Geth node */);
// create a new factory
const factory = new ContractFactory({
web3: web3,
/* Acco // Function call
// Using callback function
fs.outputJSON(file, {name: "David"}, err => {
if(err) return console.log(err);
console.log("Object written to given JSON file");
});
const path = require("path");
npm uninstall solc
npm install solc@0.4.25
[user@home ~]$ npm install truffle
> truffle@5.0.27 postinstall /home/user/node_modules/truffle
> node ./scripts/postinstall.js
- Fetching solc version list from solc-bin. Attempt #1
- Downloading compiler. Attempt #1
npm WARN save> var Web3 = require('web3');
> var solc = require('solc');
> var web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'));
> var CONTRACT_FILE = 'HelloWorld.sol'
> var content =fs.readFileSync(CONTRACT_FILEnpm install solc
npm install --save solc
npm install --save solc@0.4.17
pragma solidity ^0.4.17;
import json
import web3
from web3 import Web3, HTTPProvider
from solc import compile_source
from web3.contract import ConciseContract
from web3.middleware import geth_poa_middleware
# Solidity source code
contract_source_code = '''
pragmCommunity Discussions
Trending Discussions on solc-js
QUESTION
I am new to the field of blockchain and ethereum. I have been trying to create a simple testing network using truffle and ganache where I created a new workplace in truffle and tried to build a quick react frontend app to connect to the ethereum using Web3.
Everything works fine. I did install the MetaMask and created a new network to the port:7545 and every change that happened to the ganache affected the MetaMask.
This is the code of web3 .
...ANSWER
Answered 2021-Aug-14 at 19:08So I tried the same code using truffle and ganache and it works for me. The only difference is that i am running ganache on port 8545 and connecting metamask with that port in url. I believe that you are providing somewhat incorrect values here const todoList = new web3.eth.Contract(TodoList.abi, ADRESS);
Make Sure that your contract's abi and address is correct. Read details about instantiation of contract object with correct values here
Here is how i am reading the JSON file:
const TodoList = JSON.parse(fs.readFileSync('./build/contracts/TodoList.json', 'utf8'));.
I am simply extracting the abi from it just like your code. For Contract Address part, I get the address manually from the output console after running truffle migrate --reset all.
After this you will get a receipt information in console like this
QUESTION
I'm trying to compile a smart contract, truffle cannot find the solc when using this compiler configuration. It cannot autodetect the solc version from the source files.
...ANSWER
Answered 2022-Mar-08 at 12:59In general, I decided to investigate what the problem might be and found out that if you have different versions of files in your project, you can specify pragma and compile files with different versions. I found out about it from here
As I understand it, this functionality is available from truffle version 5.2.0 and higher. I also found a great repository with an example that will most likely be able to help - v5.2-example-box. Most likely if you compare your project with this one you will surely be able to find the error.
Initial answerI would suggest installing a specific version of solc as suggested in the documentation to check if there are any other issues.
For my work I use the following settings in truffle-config.js:
QUESTION
I am following the pet shop tutorial on Truffle. The first few steps work, i.e., I can compile and migrate the Adoption contract. My software versions are:
Truffle v5.4.33 (core: 5.4.33) Ganache v7.0.1 Solidity v0.5.16 (solc-js) Node v17.6.0 Web3.js v1.5.3
Adoption contract code:
...ANSWER
Answered 2022-Mar-03 at 17:47Your contract requires only pets with IDs between 0 and 5 can be adopted:
QUESTION
The contract function is
...ANSWER
Answered 2021-Oct-29 at 21:28First check your account balance : balance = web3.eth.getBalance(someAddress); then try to specify the gaslimit contractInstance.createProposal("ADHD", "Foo", 2, {from: web3.eth.accounts[1], gas:3000000})
QUESTION
So I'm trying to learn to build NF token, and I cloned a repo. It's supposed to work with truffle. The thing is I have an error with the compiler, and I don't really understand. Indeed what I know is that the solidity compiler have problems with different versions, hence working with truffle CLI that works better with different versions projects.
So I tried to change to "pragma solidity >0.5.8 <0.6.0;", I did sudo truffle compile, and still have the error.
The error message I got is:
my typo `Source file requires different compiler version (current compiler is 0.7.4+commit.3f05b770.Emscripten.clang) - note that nightly builds are considered to be strictly less than the released version
I know that I need to find a good version of solidity and truffle, but I believe that my versions are okay :
Truffle v5.0.5 (core: 5.0.5) Solidity v0.5.0 (solc-js) Node v14.16.0
ANSWER
Answered 2021-Mar-16 at 11:01Change the compiler version in the truffle-config.js file to match the one your are using in your smart contract
QUESTION
In my code, await works but .then dose not work in truffle exec.
I ran the following code in Truffle exec.
This code has been simplified to highlight the problem.
↓test1.js
ANSWER
Answered 2021-Jan-16 at 01:03You should put your call to "callback" inside of the promise resolution. Otherwise, "callback" gets executed before your promise is resolved.
QUESTION
I have a contract which looks like this -
...ANSWER
Answered 2020-Nov-17 at 09:23Web3.js contract objects are different from Truffle contract objects. There are slight differences in the structure and of course, because it is all untyped JavaScript, you have no idea what inputs or outputs functions are going to have.
Historically, Ethereum transactions did not have return values. Web3.js behavior predates this time, and might not support returning the transaction value directly. However EIP 1288 document how the return value is available through getTransactionReceipt() and receipt object.
To have Web3.js to modify EVM state you need to do send() instead of call(). This is yet another weakly typed issue, as one should not confuse view and write functions.
Try:
QUESTION
after reading many post i can't found the issues about this Smart contract who compile but it think i miss something about the inheritance and the Abstract contract.
This is the SC :
...ANSWER
Answered 2020-Apr-09 at 04:16The problem is with Ownable constructor
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