Questions tagged [import]

This question is related to importing one file to another which means content of imported file is partially or fully accessible to this file.

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How to import file with hardhat

I'm following the Alchemy tutorial to build an NFT Marketplace with hardhat. I want to import my smart contract which is an APIConsumer by Chainlink. I can't do it by path since I'm not allowed by ...
Giacomo Bertazzolo's user avatar
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1 answer
32 views

@openzeppelin/contracts import failed

The issue I am having is when I am trying to compile my contract, I am getting multiple errors for ERC721. As imported ERC721 is importing more contracts, as seen from the errors, the issue is that it ...
Hasbik645's user avatar
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Unable to use a function from imported library

I'm trying to import and use a library to verify ring signatures. On doing so I'm getting an error while loading smart contract using w3.eth.contract(abi=abi, bytecode=bytecode). ValueError at /sc/...
P S's user avatar
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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, ...
noro meb's user avatar
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How can msg.sender call a payable function with set price from another contract?

hello everyone and happy '23. I'm having issues sorting out the following system. Contract TipWallet: receives tips with a takeTip() and updates the tip +1 every time it receives one. Contract Tipper: ...
matlemad's user avatar
1 vote
2 answers
76 views

Contract storing array returning addresses

Below is the contract which imports another contract pragma solidity ^0.8.7; import "./SimpleStorage.sol"; contract StorageFactory { SimpleStorage[] public simpleStorageArray; ...
Brijesh's user avatar
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Can I import specific functions from other contracts and not the whole contract?

I am importing Access.sol by OpenZeppelin ("@openzeppelin/contracts/access/AccessControl.sol") in a contract. The main functions I am concerned with are setupRole(),hasRole() and grantRole()....
brownWellick's user avatar
2 votes
1 answer
294 views

ERC1155 supply extension on OpenZeppelin not importing functions

I'm doing some experiments with OpenZeppelin's ERC1155 contracts and the ERC1155Supply extension does not seem to be working as it should. Even though I'm importing it to the contract, after ...
sigmaxf's user avatar
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Smart contract import differences

I hope this question is interesting for many Smart contract import by ABI or code What's the difference? Will this give us the ability to use different FUNCTION?
tomas's user avatar
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Geth import a local backup slower than syncing

System: Linux, SSD, 64G RAM Is there a way to speed up the process of importing a local Backup? So I run a node for a while (completly synced until yesterday) and wanted to play around a bit more. I ...
Richard's user avatar
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How is this scam code transferring tokens to the unspecified wallet within?

Below is the exact solidity code that the scammer were manipulating people to run by themselves. I checked that there is no wallet address specified within the code but this code will transfer the ...
ariel's user avatar
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Brownie Error cannot find contract/file

Hello I was starting to write some solidity code with brownie as eth-environment, I tried to compile the code and the import statement is showing en error - ParserError: Source "@smartcontractkit/...
Priyanshu Jha's user avatar
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259 views

import path in truffle and solc

Here's my directory structure created by truffle with openzeppelin downloaded . ├── build │   └── contracts ├── contracts │   ├── Migrations.sol │   └── MyContract.sol ├── migrations │   └── ...
mr_bovo's user avatar
1 vote
1 answer
766 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 ...
utroelski's user avatar
6 votes
1 answer
272 views

Can I import solidity code (or ABIs) into vyper?

Let's say I have a contract in solidity: pragma solidity 0.8.8; contract MyContract{ function getFive() public pure returns (uint256){ return 5; } } Could I import, inhert, etc in ...
Patrick Collins's user avatar
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importing qs to a html/javascript page

I'm experimenting with 0x samples. I'm not a back-end dev so I'm NOT running NodeJS. I don't want to go full blown ReactJS on it so I built this html wrapper for the example 0x code for retrieving a ...
Orbit Mechanic's user avatar
1 vote
1 answer
200 views

How to import struct members from Solidity Library

Trying to implement the diamond upgrade following Nick Mudge implementation in aave. Been getting this error (struct member not found or not visible after argument dependent lookup in struct) ...
Charles Okaformbah's user avatar
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How to import Openzep ERC20: Identifier not found

Can I get someone's perspective on why I'm unable to find the ERC20 contract I've npm install @openzeppelin/contracts. After import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; I get a ...
sltdev's user avatar
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unbale to import smart contract into brownie scripts

I was trying to run a deploy script with brownie but i couldnt import required .sol smartContract into my scripts This is my folder structure My code in deploy.py from brownie import Fundme, accounts,...
Jayendra Madharam's user avatar
1 vote
1 answer
142 views

DeclarationError: "Identifier already declared" when compiling SmartContract with solc

I have a Smart Contract "MyCoin". It has another SmartContract "Dex" as dependency. MyCoin: import "./openzeppelin/contracts/token/ERC721/IERC721.sol"; // import "./...
Luex's user avatar
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2 answers
489 views

Why does OpenZeppelin import interfaces to its own contracts?

I've noticed that all OpenZeppelin's token contracts import their interfaces into them. Why does OpenZeppelin import and inherit its own contract interface to the contract? Does importing a contract'...
Adrian D.'s user avatar
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2 answers
398 views

having trouble importing web3

getting this import web3 error although pip install web3 was a successs
rishi's user avatar
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1 answer
59 views

What does import {} do?

For example, import { FlashLoanReceiverBase } from "./FlashLoanReceiverBase.sol"; FlashLoanReceiverBase.sol is here: https://github.com/aave/aave-protocol/blob/master/contracts/flashloan/...
thsk's user avatar
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1 vote
1 answer
852 views

Account Extended Private Key / BIP32 Extended Private Key need to import MetaMask?

I would withdraw ETH from my Binance account and give ETH as christmas gift to my nephew and my niece. 1: Is it any drawback in a long run if I use not the ETH network but BSC? In 10-20 years or so. ...
János's user avatar
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1 answer
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Changing imports for a contract that has been deployed

I am very new to writing smart contracts and deployed one via remix.ethereum. However, during the process I imported the wrong dependency links and need to change them. I know smart contracts are ...
EthDev201106's user avatar
4 votes
1 answer
659 views

Why do many Solidity projects prefer importing specific names over whole modules?

In the Solidity docs and also in OZ libaries, I mainly find this way of importing : import "@openzeppelin/contracts-upgradeable/token/ERC721/utils/ERC721HolderUpgradeable.sol"; But in most ...
Rougefroid033's user avatar
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1 answer
185 views

I can't import my Geth account, where do I get the 64 hex character while my UTC file shows only the mac I've loaded and it said too short

please give a solution. I can't Import my geth account. It said: C:\Windows\system32>geth account import --datadir value 092426c0333f315bd569f279d***** Fatal: Failed to load the private key: key ...
Zulfi Lim's user avatar
1 vote
1 answer
225 views

Does Ethereum have a builtin package manager to prevent code duplication?

Does Ethereum have a package manager that is hosted on chain to mitigate code duplication? I've been learning Solidity development in brownie and as per my understanding in the brownie-config.yaml you ...
MShakeG's user avatar
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2 votes
1 answer
1k views

Failed brownie import when running scripts

I am trying to setup eth-brownie to get a feel of the framework but face a couple of import-related problems. Im working from a MBP running macOS with Catalina v10.15.7 $ python --version Python 3.9.9 ...
Eval's user avatar
  • 31
1 vote
0 answers
90 views

Undeclared identifier when using function from imported file

I want to import this function in another contract but I received the error from the screenshot below. This is the function I want to import: function assetTransfer (string memory order_id,string ...
Steven's user avatar
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0 votes
1 answer
98 views

Relative import issue while testing brownie

I am using brownie to interact with my Ethereum smart contracts. The scripts and tests are located in parallel scripts/ and test/ folders. How can I access the functions from scripts/ in test/ files? ...
Filip Szczybura's user avatar
0 votes
3 answers
681 views

Can't compile Truffle project that imports a .sol with different pragma version

I have a contract pragma solidity 0.6.12 version that imports several 0.6.12 version contracts and one pragma solidity 0.8.0. My truffle-config: compilers: { solc: { version: "^0.6.12 &...
user78827's user avatar
1 vote
1 answer
666 views

Getting a compile error every time I try to compile a contract with Brownie that includes an import statement from the web

I have a contract that starts with the following import statements: import 'https://github.com/aave/protocol-v2/blob/master/contracts/flashloan/base/FlashLoanReceiverBase.sol'; import 'https://github....
Pickinanameainteasy's user avatar
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1 answer
37 views

I staked ZRX through Metamask on OX Protocol and it was an account linked to my Exodus Wallet. now I can't link to my staking

ok connected metamask to stake ZRX on OX protocol. imported OX keys from my exodus wallet to a new account in metamask. seemed to work for a bit then one day i tried to check on things and it wouldn'...
John McCorkle's user avatar
1 vote
1 answer
1k views

Where to find SafeMath pragma solidity ^0.6.6?

While trying to use SafeMath to compute the modulo of a uint256 like shown in this video:https://www.youtube.com/watch?v=JqZWariqh5s (without SafeMath) I'm having some trouble finding a pragma ...
a.t.'s user avatar
  • 65
0 votes
1 answer
121 views

OpenZeppelin import problem

I am trying to import a couple of OpenZeppelin contracts to my project, but each time I am given an error related to unsuccessful imports from sources. I'm gonna attach a screenshot of my code. I have ...
Sina Rahimi's user avatar
4 votes
2 answers
2k views

How to use contracts from project dependencies in Brownie scripts?

I want to deploy a contract directly accessible in OpenZeppelin/openzeppelin-contracts@4.2.0 Brownie package without changes, namely ERC1967Proxy and other non-abstract contracts from Brownie console. ...
Utgarda's user avatar
  • 757
2 votes
1 answer
161 views

searching for an elegant solc compiler solution

I firstly had a problem with import statement inside my contracts, I figured out that the solc compiler didn't handle import statement, and that we needed to make out own. With the help of some nice ...
Cizia's user avatar
  • 233
0 votes
1 answer
880 views

DeclarationError: Identifier already declared

I'm getting the below compile error message: DeclarationError: Identifier already declared. --> contracts/coffeeBase/SupplyChain.sol:9:1: | 9 | import "../coffeeAccessControl/ConsumerRole.sol&...
alpo's user avatar
  • 144
1 vote
1 answer
39 views

ParseError after a previously successful compile

I received a successful compile message: Compiling your contracts... =========================== > Compiling .\contracts\coffeeAccessControl\ConsumerRole.sol > Compiling .\contracts\...
alpo's user avatar
  • 144
1 vote
0 answers
76 views

Openethereum/parity import export

anyone has used export to take a backup and import to load data in openethereum(parity) blockchain? please provide information I have tried export .rlp file and it works but when trying to import ...
Nilamben Patel's user avatar
0 votes
2 answers
665 views

Is it possible to import smart contracts with different compiler versions?

I'm using hardhat to compile my contracts. I am aware that hardhat is good at compiling contracts with different pragma versions, however, the contracts can't compile because they're importing ...
Kaleb Amarante's user avatar
0 votes
2 answers
689 views

restore a deleted imported metamask account

i had my metamask wallet stoled, and my first reaction was delete the stole account. But this account has some pools os pancakeswap, and i need to restore it to save my tokens. I have the seed phrase ...
identicon's user avatar
2 votes
1 answer
2k views

ImportError: cannot import name 'Accounts' from 'brownie.network.account'

Setup MacOS Catalina v10.15.6 IntelliJ Ultimate v2020.1.1 Python v3.7 eth-brownie v1.14.6 Ganache CLI v6.12.2 I created a VENV using my Python 3.7. Following Patricks tutorial, I have installed eth-...
pookie's user avatar
  • 121
1 vote
0 answers
425 views

Event name conflicts and data out-of-bounds error in Remix

I have been getting a weird errored: Error: data out-of-bounds (length=0, offset=32, code=BUFFER_OVERRUN, version=abi/5.1.2) error when testing contract functions in Remix, even though it goes through ...
Eric Chen's user avatar
  • 113
0 votes
1 answer
1k views

Inheritance, Imports and Remix

This is the LSP3Account contract: https://github.com/lukso-network/standards-implementations/blob/master/contracts/Accounts/LSP3Account.sol I want to create a contract on Remix that inherits from it. ...
António Gonçalves's user avatar
1 vote
1 answer
92 views

1INCH Version error

I got error importing and using 1INCH. The problem is in the versions. In IOneSplit.sol version is 0.5.0 (pragma solidity ^0.5.0). And IOneSplit imports IERC20 which is in 0.8.0 (pragma solidity ^0.8....
RafayelKh's user avatar
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0 answers
708 views

Private key opens a different address than the one that it "should"

I have a small problem (hope it doesn't prove to be huge) with importing wallets using private keys. I am not the most knowledgeable when it comes to Ethereum, and was hoping you guys could maybe help ...
deliriant's user avatar
0 votes
2 answers
3k views

How to import and compile contracts of different versions solidity

How to import and compile contracts of different versions using solidity in remix? When I import a contract I get this error: ParserError: Source file requires different compiler version (current ...
YulePale's user avatar
  • 1,683
3 votes
2 answers
224 views

What happens if GitHub path for import changes?

I wondered what happens if for example OpenZeppelin changes the path of a contract I have imported like this: import "@openzeppelin/contracts/token/ERC721/ERC721.sol";? Will my contract ...
Paulus's user avatar
  • 410