Questions tagged [solc]
Questions related to the compiler for Solidity: solc
230
questions
31
votes
4answers
7k views
Error while compiling: Stack too deep
When trying to compile, I am getting the following error:
"Internal compiler error: Stack too deep, try removing local variables."
Is there any way around this? I'm not sure if I'll be able to ...
21
votes
2answers
7k views
How do I find out the solidity compiler version I am using?
Specifically, while using Mist. When I create a contract via the Mist GUI, I want to then be able to verify the source code over at Etherscan. However, Etherscan requires that you provide the ...
17
votes
2answers
2k views
Is there a way to disable a warning in solidity code? [duplicate]
I'm writing unit tests for some contracts and in some of the tests I'm generating a warning on purpose and solc will display this warning when compiling.
Is there a way to disable warnings in solc ...
15
votes
2answers
2k views
Etherscan: How can I verify a contract with multiple imports deployed with Truffle?
When I deploy a contract with Truffle that has an import statement, and try to verify it on etherscan, my understanding is that I need to paste in the contents of the imported file.
I get an error on ...
12
votes
1answer
419 views
How to generate sugared assembly code from Solidity code?
In the Solidity documentation I see a sample assembly code:
{
mstore(0x40, 0x60) // store the "free memory pointer"
// function dispatcher
switch div(calldataload(0), exp(2, 226))
case ...
11
votes
3answers
5k views
Internal compiler error: Accessors for mapping with dynamically-sized keys not yet implemented
I have a mapping(string => Person) public map:
struct Person {
string name;
string description;
address primaryAddress;
string linkToWebsite;
string ...
11
votes
1answer
7k views
How do I install solc on Mac Osx? Error encountered “Error: No formulae found in taps.”
I'm trying to install a solidity compiler on my Mac.
I've followed the guide here: https://github.com/ethereum/go-ethereum/wiki/Contract-Tutorial
The error that I've gotten when installing ccp-...
10
votes
1answer
153 views
Is it dangerous to name my function ccccvKygDv?
For those keeping track at home, the function hash of a function named ccccvKygDv() is 0xffffffff, the same as a null address.
pragma solidity ^0.4.0;
contract NullFunction {
function ccccvKygDv()...
9
votes
1answer
673 views
How to get a contract verified on etherscan?
I'm having a hard time getting a contract verified on Etherscan.
I deployed the contract using Ethereum Wallet, I can effectively find it on Etherscan but when I copy-paste the exact same code to the ...
9
votes
1answer
2k views
Link solc with geth problem
After upgrading to geth 1.4.4 I am no longer able to from to reference the compiler from geth.
The solc compiler is installed in /usr/local/bin but this is what I get when I check for available ...
8
votes
5answers
11k views
What is the cause of the error: Expected import directive or contract definition
I'm working on the tutorial at https://www.ethereum.org/dao and I'm getting the following error:
1:5: Error- Expected import directive or contract definition.
function owned() {
^
When I get ...
8
votes
1answer
1k views
solc bin vs. bin-runtime
Solc says that bin-runtime is the runtime part of the contracts. What exactly is the runtime part and how does it differ from bin output?
8
votes
1answer
497 views
What is the cryptic part at the end of a solidity contract bytecode?
Given the following contract:
pragma solidity ^0.4.11;
contract Simple {
bytes32 public v;
function set(bytes32 _v) {
v = _v;
}
}
When disassembling, neither remix, solc or evm ...
8
votes
2answers
1k views
Infinite gas estimation from solc for simple function
Here is a simple Solidity contract:
pragma solidity ^0.4.16;
contract Test {
uint[] array;
function testGasEstimation() public {
array.length = 1;
}
}
Here is the output of ...
7
votes
2answers
1k views
All cases when Solidity compiles to invalid jump destination
Solidity generates EVM bytecode that leads to an invalid jump destination when:
throw is used
... ?
... ?
Can the above list be completed, with examples?
To explain the first item, throw in ...
7
votes
1answer
304 views
Tracing back tripped require() to a source code line
What would be the process to map failed transactions (require, throw, etc.) back to the source code line where they occurred?
Any examples of such yet?
7
votes
3answers
941 views
Alternative to deprecated Greeter example code?
After loads of research, it seems the Ethereum.org Greeter example code no longer works. Here's the GitHub issues thread: https://github.com/ethereum/go-ethereum/issues/3793. There are some ...
7
votes
1answer
217 views
When did the Ethereum “free memory pointer” change? (6060… -> 6080…)
I have been digging a bit deeper into the Ethereum bytecode with the specific goal to do contract verification from the source code.
I noticed, while doing some tests, that the initial bytes of the ...
7
votes
3answers
865 views
Source “<filename>” not found: File outside of allowed directories. [solidity/solc]
I'm using vim with the syntastic plugin.
I'm getting this message:
Source "zeppelin-solidity/contracts/token/StandardToken.sol" not found: File outside of allowed directories. [solidity/solc]
when ...
7
votes
2answers
2k views
Unhandled rejection Error: Couldn't decode uint256 from ABI
I am working on using a sample Contract using NodeJS, Web3, and Solc but I encountered some error that the given address in the Contract that I've created couldn't decode. Am I doing something wrong? ...
6
votes
1answer
4k views
How to include solidity file into another?
I completely stuck on modules importing into Solidity contract. Here is my files/directory layout:
.
|-> contracts/
|-> contract1.sol
|-> contract2.sol
File contract1.sol contains only ...
6
votes
3answers
514 views
Solc Compiler oversight? Innappropriate mapping declaration overwrites storage
I have written a contract that has the mapping storage variable A & B. These variables get initialized with some values in constructor. A method getBalance returns the balance from mapping A & ...
6
votes
1answer
380 views
Getting segmentation fault while compiling solidity contract
Getting segmentation fault when compiling a simple contract on geth on OSX Yosemite
web3.eth.getCompilers();
["Solidity"]
source = "contract test { function multiply(uint a) returns(uint d) { return ...
6
votes
1answer
547 views
Compiler Issue or Improper State Variable declaration?
After seeing some unexpected compiler results, I've reduced the issue to this tiny example:
The following compiles under 0.4.10 in Remix:
contract StorageMapping {
struct S {
mapping(...
5
votes
5answers
10k views
Solc --version: command not found
I'm trying to use solc with no success.
I download solc with npm install solc but when I run solc --version the console output is:
command not found.
If I list packages npm list I'm able to see ...
5
votes
2answers
668 views
Error when calling the selfdistruct method in solidity
I am quite new to solidity, and I have not managed to find a solution for this problem.
I am passing the function an address but it says the following:
"Invalid type for argument in function call. ...
5
votes
2answers
332 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 ...
5
votes
1answer
3k views
How do I host Ethereum on a server?
I recently tried to get geth and solidity up and running on a virtual server I have some free time on.
I got stuck trying to build the Solidity compiler due to issues with the OpenGL library. I've ...
5
votes
2answers
3k views
Install Solc Compiler on Windows 8
I need a command line compiler in order to make an expert system that automatically builds, tests, and deploys systems of smart contracts based only on metadata. I have tried for several days to ...
5
votes
2answers
406 views
How do I fix Javascript stack overflows when compiling very large file with solc?
If I compile a very large file with solc the stack overflows. This will happen most commonly in node because the default stack is only 984kbytes, which is strangely what you would expect for a 1990s ...
5
votes
1answer
2k views
TypeError: 'setSolc' is not a function
I am trying to sync geth and solc.
which solc # I get the path to my solc
/usr/local/bin/solc
Open the geth console
geth console 2>>geth.log
and now I try to sync
admin.setSolc("/usr/local/...
5
votes
1answer
465 views
Solidity compiler doesn't work in the Javascript Console
I'm using Geth 1.4.5-stable along with Solc version 0.3.5-0 both on Linux. It is run on a Digital Ocean server. I have a fully synced testnet chain and I'm trying to compile contracts from within the ...
5
votes
2answers
619 views
Error: Member “assertNotEqual” not found or not visible after argument-dependent lookup in uint256
I am trying to run test cases in sol-unit for Solidity, but when I compile my code with solc compiler I get an error. I don't think the error is critical, but there is very little material on net ...
4
votes
2answers
342 views
Do intermediate memory variables cost gas?
Example without an intermediate variable:
uint startTime = 9;
uint allowedTime = 7;
require(now > startTime + allowedTime);
Example with an intermediate variable:
uint startTime = 9;
uint ...
4
votes
4answers
3k views
web3 contract instantiation
I'm trying to create a contract object with web3.
var contract_abi = result['contracts']['Test']["interface"];
//[{"constant":false,"inputs":[],"name":"inc","outputs":[],"payable":false,"type"...
4
votes
3answers
4k views
Installing solidity in Debian Linux
I'm trying to install solidity but apparently there are no online repositories with all dependencies. I have tried using the methods described here.
sudo add-apt-repository ppa:ethereum/ethereum
...
4
votes
2answers
2k views
What is the proper way to build and call a specific version of solidity?
I am getting the following error from solc:
Error: Source file requires different compiler version (current compiler is 0.4.11-develop.2017.6.22+commit.68ef5810.Darwin.appleclang - note that nightly ...
4
votes
1answer
315 views
Is the Solidity compiler deterministic?
I am aware that you have to specify the Solidity compiler version and whether or not you use the optimisation flag. But even with all that considered - is the compiler deterministic?
4
votes
2answers
753 views
Contract not deploying on blockchain using solc & web3
I am using the npm package of solc to compile the contracts and accessing it as given here. It is compiling my contracts. But when I try to deploy the contract using
web3.eth.sendTransaction({data: ...
4
votes
1answer
2k views
Enums in Solidity
Enum's are not working in solc? Just tried to compile demo contract from gihub documentation :
contract test {
enum ActionChoices { GoLeft, GoRight, GoStraight, SitStill };
function test()
{
...
4
votes
2answers
3k views
Can't install solc on Mac OS X
I can't install solc on Mac OS X. I have tried the following:
npm install solc
/Users/punddalinni
└── solc@0.3.0-1
npm WARN enoent ENOENT: no such file or directory, open '/Users/punddalinni/...
4
votes
1answer
127 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 ...
4
votes
1answer
2k views
The solc is not generatig *.abi file with the option --abi and -o build
When I use the --abi option, the abi interface is generated:
$ solc Greeter.sol --abi
======= Greeter.sol:mortal =======
Contract JSON ABI
[{"constant":false,"inputs":[],"name":"kill","outputs":[],"...
4
votes
1answer
358 views
How to deploy a solidity contract to the blockchain. myContract.new is not a function
I have a contract that compiles in browser solidity and solc. Using either the auto-generated deployment code in browser solidity or my own npm version, I end up with the error
"myContract.new" is ...
4
votes
1answer
280 views
Unexpected implicit casting in Solidity's exponential operator
While investigating an incorrect token award bug in an ERC20, it's come to light that there is an apparent inconsistency in casting with regard to the exponential operator a**b. In particular, the ...
4
votes
1answer
805 views
solc returns empty bin for contracts with constructor and inheritance
Having a simple contract structure like this:
pragma solidity ^0.4.8;
contract A {
uint public a1;
}
contract B is A {
uint8 public b1;
}
I can compile it with:
> solc --combined-json "abi,...
4
votes
1answer
142 views
Setting a struct once cause error while compiling: Stack too deep
See my smart contract below :
contract Test {
struct MyBool {
bool initialized; // /!\ if false then 'NA' else fetch value's property
bool value;
}
struct Patient {
...
4
votes
1answer
97 views
Parse contract to retrieve declared identifiers
Node.js Solidity compiler parses contract and returns its ABI, is there any library to retrieve all declared identifiers in a contract?
For example, the following contract:
contract Person {
...
4
votes
0answers
70 views
What is the keccak256 reference in opcodes from solc? [duplicate]
Opcodes -
Opcodes:
PUSH1 0x60 PUSH1 0x40 MSTORE CALLVALUE ISZERO PUSH1 0xE JUMPI PUSH1
0x0 DUP1 REVERT JUMPDEST PUSH1 0xA0 DUP1 PUSH2 0x1C PUSH1 0x0 CODECOPY
PUSH1 0x0 RETURN STOP PUSH1 0x60 ...
3
votes
3answers
3k views
“[Errno 2] No such file or directory: 'solc' ” Using py-solc and solidity
I installed py-solc and solidity:
solc, the solidity compiler commandline interface
Version: 0.4.16+commit.d7661dd9.Darwin.appleclang
and ran this code in python (with a contract source example):
...
