4
votes
Accepted
No arguments passed to the base constructor. Specify the arguments or mark contract as abstract
You are probably importing the newer versions of openzeppelin contracts, in which the constructor has an argument. This has been included to provide felixibilty to the deployer for adding another ...
- 5,000
4
votes
Where is the best place to acquire large amounts of testnet eth?
The Chainstack Faucet distributes test tokens for the major Ethereum networks and more.
You can get tokens for:
Ethereum Sepolia — Use it to test DApps and smart contracts
Ethereum Goerli — Use it to ...
3
votes
Is it possible to allow a third-party relayer to spend ETH on your behalf?
The only options I can think of are:
Sign a transaction sending Eth and give this to someone. They can broadcast this when/if they want to use your Eth. Lots of downsides, for example that the nonce ...
- 30k
3
votes
Where in the code of this unstake function is ETH actually transferred?
The BridgeRouterFacet contract's unstakeETH() function:
function unstakeEth(address bridge, uint88 zethAmount)
external
nonReentrant
onlyValidBridge(bridge)
{
if (...
- 1,635
2
votes
API to gather list of top token holders
Try Bitquery's Token holder API can provide details of token holders such as holder count, individual holder, holder with specific balance, and holders on specific blocks or dates.
It also has things ...
- 422
2
votes
Accepted
What does mean impersonate account in hardhat?
Impersonating accounts only works on hardhat network including forked chains. If you could impersonate accounts on live networks it would be a major security issue. You can access the balance and ...
- 161
2
votes
Why is Transaction Value showing 0 ETH on Etherscan?
This is not a transfer transaction. Rather, the transaction is the execution of a function of the smart contract. After executing this function of the smart contract, a number of internal transfer ...
2
votes
Why is Transaction Value showing 0 ETH on Etherscan?
Since you are using Coinbase, the initial transaction you made didn't really contain the ETH, but instead, it made a contract call that triggered the actual transaction to send the ETH from Coinbase's ...
- 1,635
2
votes
Despite calculation I get contract creation code storage out of gas
You will need to calculate the sum of the following values:
32000 gas - creating a contract
21000 gas - procedure call
Gas per execution of creation code (initialization code + constructor.
The ...
- 1,017
2
votes
How to assign and send ether value together with deployment of contract using Foundry
As long as your constructor is marked payable, you can modify your test like this:
function setUp() public {
test = new testContract{value: 777}(
Owner;
);
}
You can ...
- 1,635
2
votes
Sending fix amount of ETH without manually input value in remix
Payment contract does not have 5 ether balance that is the reason why this is reverted.
either have a receive(){} fallback to deposit eth to your contract, or send 5 ethers when sendEth() is called.
- 106
2
votes
Accepted
Uniswap web3 py buy token fails with execution reverted
This looks like a decent script & it should work. What I'd look for is:
If your account has enough ETH for the swap
If the token that you are trying to get as a result has fees in the contract &...
- 1,158
2
votes
Transferring Assets Between Ethereum and Binance Smart Chain
In order to transfer assets between different chains, you need to use a bridge. The simplest way is to use Metamask's built in bridge function: https://portfolio.metamask.io/bridge?metametricsId=null.
...
- 340
2
votes
I need the address of the oracle service that provides football match results and related pricing information
You can use Chainlink Functions, and consume any available Football API.
You can explore some of the available Football APIs from this list.
First, you can follow Chainlink Functions Getting Started ...
- 4,209
2
votes
TypeError: Cannot read properties of undefined (reading 'parseEther')
ethers.utils.parseEther() is deprecated in newer versions (i.e., v6) of the Ethers library.
You need to use ethers.parseEther() instead for compatibility with the latest version.
- 37
1
vote
I fundend an ETH smartcontract using .sol and remixeth.io but cancelled contract before withdrawing the coins
Here's the etherscan link to the contract.
I can see 2 transactions of transfer function.
If you have any withdraw function on the smart contract, its possible otherwise sadly its not possible to ...
- 170
1
vote
Accepted
Why is my _transfer function transfering all my tokens to the deadWallet?
You have to be careful with the message.sender:
message.sender is the entity that makes the last function call.
For example if you call a function A (of a contract C) that internally calls a ...
- 818
1
vote
Accepted
How should I handle tax that is less than my denominator?
One approach you could consider is to implement a tiered tax system. Instead of applying a flat tax rate to all transactions, you could have different tax rates for different transaction sizes.
For ...
- 4,209
1
vote
Converting ETH from Ethereum Wallet to BNB on a (BSC) Wallet
You need to use some form of a "bridge" between different networks. Many services offer this functionality, some of which provide an API for your use.
For instance, take a look at https://...
- 131
1
vote
How to get chainlink price feed data for my national currency?
Chainlink data feed not only provides price of multiple asset values in units of USD(like BTC/USD, ETH/USD) but also provides the price of multiple fiats in units of USD.
If you want to implement &...
- 700
1
vote
Error when using hardhat but changes made successfully onto smart contract, was able to see changes on etherscan
Solved: Just updated my ethers version to 6.6.4
- 21
1
vote
Accepted
Java Web3j - How to solve the error `invalid sender`?
I found why this error occurs. Above codes have no mistake. This error came from wrong chain Id. After using the correct chain id, the error is disappeared.
1
vote
MethodUnavailable(error) when shifting from Ganache to Sepolia Testnet
Infura doesn't support eth_sendTransaction. (For it to support that, it would need to know your private key, but it's a shared public node.)
You need to either sign the transaction yourself and then ...
- 359
1
vote
Differentiate a swap and normal transfer on erc-20 token transaction
Depends on what volume you're trying to calculate, for instance if you are trying to calculate volume for a specific DEX pair, you could listen to Swap event (almost every pair has one) of that pairs ...
- 21
1
vote
I need help from Expert Dev for POS bot
It is hard to know exactly what your problem is there with no information on the code you deployed, but it sounds like you have been scammed. If someone gave you some Smart Contract code, that you ...
- 80
1
vote
ETH sent default on BASE network sent on wrong network
There's on way to revert a transaction once it's executed, so your only chance is to access the same address on the different network.
If you have the private key for the receiving address, you can ...
- 30k
1
vote
Prices on Dexes
Price can change only between blocks. On ethereum a block lasts 12 seconds, during which the price doesn't change. Also if no trade happens in a block, the price still doesn't change.
You're ...
- 3,729
1
vote
Consolidate multiple Ethereum accounts
Yes, it's possible to consolidate your Ethereum wallets by transferring the Ether from each wallet to a single one.
To do this, you simply initiate a transfer from each of the smaller wallets to the ...
- 354
1
vote
Despite calculation I get contract creation code storage out of gas
This is probably not a satisfactory answer, but it addresses some issues in your question.
Generally it's impossible to predict the gas limit exactly. Especially without actually dry-running it. But ...
- 243
1
vote
Accepted
How do I hide or mask the sending address when sending tokens or eth
In order to prevent funds from being easily tracked on the blockchain, you could use a Mixer.
Mixers allow users to deposit an amount of tokens, and then withdraw the tokens from another address that ...
- 1,635
Only top scored, non community-wiki answers of a minimum length are eligible