With help of https://ethdrop.dev, I can get a test account with 0.001 ETH ( kovan test network ), and, I can deploy smart contract with remix ide.
I used truffle to make a solidity project, and I am trying to deploy to test network (kovan) instead of localhost(ganache).
But, with the test account, there is error: no enough gas to deploy
How I can get more test eth?
Or, I must use money to solve this problem?
I suggest you use a a different testnet, like Görli testnet.
Kovan is based on OpenEthereum (Parity) code and is being phased out.
Related
Remix is telling me "Currently you have no contract instances to interact with." But that's because Remix Won't Allow me to deploy my contract. Please Help I'm new to thisPicture of my remix smart contract
You have not compiled your smart contract. You need to first compile your smart contract only then you can deploy your smart contract.
not getting any free test ETH for the Rinkeby network from any of the faucets I know, such as
rinkeby authenticated faucet= https://faucet.rinkeby.io/
chainlink= https://docs.chain.link/docs/link-token-contracts/
rinkeby ether faucet= https://rinkeby-faucet.com/
I don't wanna wait anymore, it's been days
So, can anyone pls give me some free test ETH for the Rinkeby network on this address-
0x7EfE92D0bC38381D72F0D427833183D2aC805b43
Same, every single faucet seems to be completely broken
0xd6e0320D7EF718e853Ff6450eDdD82934e081e1f
If anyone can send rinkeby eth, i would appreciate it.
For a number of reasons, Ethereum Remix is great for developing in Solidity. However, I need to integrate what I develop there into some other Web3 front end stuff. So after each time I deploy a smart contract in Remix I have to copy and paste the contracts address as well as the ABI into another IDE so it can interact with the Web3 frontend.
Is there some sort of way to do the step of copying the contract address and ABI from Remix into a text file on my local system? I couldn't find a Remix API. Was wondering if anyone has another idea.
as most of the BEP20-Tokens-Contracts are online available on GitHub or BSCScan you should be able to just copy the code and paste it into remix.ethereum.org and deploy it. I did that and the contract deployed successfully to the BSC but the token information are missing. What do I do wrong?
Here is the code I copied: https://bscscan.com/address/0x0cF011A946f23a03CeFF92A4632d5f9288c6C70D#code
and here is my contract deployed to the BSC: https://bscscan.com/address/0xf5be6f7f00a4870b46f3ab6d16f5095731da97d7
I have just changed the name of the token, but the token information are not showing up on BscScan nor do I see the token in my Wallet. Any help is appreciated!
Your contract's bytecode contains just the Address contract bytecode. Since it's the first contract in the list (sorted alphabetically), I assume you simply forgot to select the contract that you wanted to compile.
You need to select the NyanCatToken contract (which effectively imports the Address as well) when compiling in Remix.
I am trying to write upgradable smart contract in ethereum. Can anyone give an example of upgradable smart contract in ethereum and accessing data.
To write an upgradable smart contract I suggest you do the following (works for me):
Create a storage contract on which you will store all your map and variables. Add a modifier to the functions changing state. This modifier should require that an address must be present in a specific map (let’s call it authorized) to change the state of map or variable. Place the owner’s address in that map.
Write a function to authorize external address on the storage contract
Deploy another contract containing the logic of your app.
Autorise the logic contract on the storage contract.
Upon upgrade of the logic, deny access to the storage contract from the logic contract, deploy your upgraded logic and link the new contract to the storage.
Tadaa you now have an upgradable set of smart contracts.
Smart Contract cannot be replaced, but you can create a smart contract proxy to be able to replace the calling of all new Smart Contract functions (previous smart contracts cannot be removed on the main network ethereum).
Complete explanation and examples can be seen Here
You can implement follow Proxy Pattern
Blog
https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357
Smart contract upgradability is a state of the art area. Currently, there are a few solutions, but each of them has its own pros and cons. Here are the solutions with examples:
https://consensys.github.io/smart-contract-best-practices/software_engineering/