All Questions
610 questions
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8
views
Two of my transactions were not completed
Two of my transactions were not completed but I was charged for them. How do I get the fees back? It's around $25.
0
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0
answers
5
views
Problems in experience of blockchain splitwise
When I was running code of this splitwise code by using "npx hardhat run --network localhost web_app\script.js",but it answered back with the fault:"cannot find module abiDecoder",...
- 1
0
votes
0
answers
23
views
ERC-20 Token Lookup
I am looking for an ERC-20 token with only the Name (Ticker), but when I search that up on Etherscan I come up with many many options.
Is there any way yo look these up by other criteria such as ...
0
votes
2
answers
59
views
Why is my transaction showing as 'success' but the value is 0 ETH ($0.00)?
I am new to the bitcoin world and any help would be appreciated.
Transaction hash: 0xfba22d3b6d047bbd81d25dd5d6ef3f070f57f79abeaeb4de49e7dc605ab4cb7c
If I was scammed, is there any way to recuperate ...
1
vote
1
answer
41
views
Why I need an RPC URL to call a view function in Solidity
hello so my question is why I should need a RPC Url while calling a view function
Here is my simple code that is deployed in the localhost anvil testnet and that run successfully and there I did not ...
0
votes
0
answers
15
views
I got scammed by Robot [duplicate]
There's APP called ETH MINER ROBOT. I withdraw 0.1ETH to my Binance Account and never received it.
- 1
0
votes
0
answers
11
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I got scam from one pretty girl she told me invest USDT up to 5k and earn daily profit, refer this website, "ogfvs.top" ETH-ERC_20 [duplicate]
I got scam from one pretty girl she told me invest USDT up to 5k and earn daily profit, refer this website, "ogfvs.top" ETH-ERC_20 by using this website, and i lost my USDT 4600 recently, ...
- 1
0
votes
0
answers
18
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Private Node Network-GoEth
i am trying to install private network of three nodes on my single laptop.
i did following:
install go-eth.
used a medium article and followed instructions
when i try to connect nodes with each other,...
0
votes
1
answer
18
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Can someone spend native Ethereum from a signer's address using just a signature?
I'm exploring Ethereum's cryptographic features and wondering if there’s a way for someone to use a signature to spend native Ethereum (ETH) from the signer's address without directly requiring the ...
0
votes
0
answers
17
views
ETH tokens sent to BNB address in Safe Wallet
Some ETH tokens have been sent to a BNB safe address in Safe Wallet. To recover them I have followed this procedure: https://share.zight.com/z8uBKZYr.
The wallet owner of the Safe Wallet is: ...
- 1
0
votes
1
answer
459
views
Some one make a fake token transfer from my friend wallet without having his PK
Now how is that possible? https://etherscan.io/address/0x781C2EA34506d904573E7E92be19154B729B2EE5#tokentxns
this guy send 65 ETH to an address but some scammers sent 65 ETH token(fake) with his ...
1
vote
0
answers
39
views
Why don't consensus clients have an RPC method to query the total supply of ETH (all ETH minted)?
I understand that the total supply of ETH can't be hardcoded into consensus clients because this value needs to be derived from the blockchain state to prevent tampering. To get the total supply, we ...
- 41
0
votes
0
answers
13
views
I exchanged scam tokens,pls help me [duplicate]
I exchanged ETH for scam coins through BYBITWEB3 on UNISWAP, now they cannot be sold on BYBITWEB3 DEFI (he writes that the contract has closed source code) and when trying to reverse exchange through ...
0
votes
0
answers
16
views
No "SSTORE" opcode found in the result of debug_traceTransaction()
when I try
'curl -H 'Content-Type: application/json' --data '{"jsonrpc":"2.0", "id": 1, "method": "debug_traceTransaction", "params": [ ...
- 25
0
votes
0
answers
28
views
Recovering crypto from ethereum RPC
I have found some of very old RPC credentials on ethereum. I tried to run it or try to recover the balance from it. But the hostname it had is down. If I get other RPC hostnames and same credentials ...
0
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0
answers
7
views
If two persons split the minting process payment 80-20% on opensea , what are the rights and risks of each one on NFT?
I am new to NFT minting.
I created a collection and am about to create a NFT .
Someone has a buying customer on opensea for my Artwork to be minted. He suggests to pay 20% of the minting fees while I ...
- 1
0
votes
1
answer
8
views
How I decrease the gas fee when I call the contract method?
Deploying my contract on rinkeby cost ~12 USD in gas fees (using truffle cli). Is it possible for me to specify gas fees/set a limit in the smart contract so it costs me 0.5 USD, but takes longer to ...
- 101
0
votes
0
answers
7
views
Lost ETH using BOT [duplicate]
I am a newbie and saw a video in YouTube about setting up ETH contract using BOT. The code was also given by the YouTuber. I created the contract and linked it to MetaMask and then transferred ETH to ...
- 1
0
votes
1
answer
43
views
Failing while trying to deploy ETH SAFE on BASE. What am I missing?
I tried following the steps outlined here:
https://help.safe.global/en/articles/40812-i-sent-assets-to-a-safe-address-on-the-wrong-network-any-chance-to-recover
https://share.zight.com/z8uBKZYr
This ...
0
votes
1
answer
53
views
Best Practices for Gas Optimization in Ethereum Smart Contracts
Ethereum community!
I'm currently working on developing a smart contract for a decentralized application (dApp) on the Ethereum blockchain. I'm concerned about optimizing gas usage to enhance ...
- 5
0
votes
1
answer
24
views
How to enable multi-payment in the NFT marketplace like ETH, USDT, MATIC, DAI, etc?
Hope you are doing great.
I'm trying to build a NFT marketplace with multi-payments.
When users buy a NFT, they must be allowed to pay with any of the payments such as ETH, USDT, MATIC, DAI...
How to ...
2
votes
1
answer
77
views
C code to sign a message compatible (such that can be verified) with Metamask, mycrypto, etc
I am on macOS and trying to put together the code to sign (and once I succeed to verify) a message with an Ethereum private key. So, the private key (just used to test, no funds there lol) is: ...
- 21
0
votes
0
answers
19
views
Possible to use CallContract during validation (on block not yet included in blockchain)?
I'm building a consensus engine. Already built a prototype of it, and now interested in improving it (mostly simplifying the implementation so it fits better with existing Ethereum codebase with least ...
- 211
0
votes
2
answers
323
views
How to get raw transaction from v, r, s signature
My question is what would convert transaction fields r, s, v to rawTransaction. Can I see a transaction in the mempool and get its signature and raw?
here is an example vrs:
raw = ...
- 33
0
votes
1
answer
100
views
web3py Force send eth transaction at the same block without conformation or any errors
My question is how to force send a transaction via web3 or any other way without paying attention to errors. I know that I will pay for the commission if I am not successful and that will suit me. I'm ...
- 33
0
votes
1
answer
67
views
can eth_call() make this?
I have a contract and inside the contract there is a non-payable function that can call externally. this function do some analysis,and calls other payable function than can make real transaction using ...
- 69
1
vote
0
answers
25
views
Good extensions for both Foundry & Hardhat
Hello i'am looking for good vscode extension for both foundry & hardhat. Thank you for your feedback !
- 73
1
vote
1
answer
53
views
how to revert transaction excuted by low level call
Hello ethereum community. I'm experimenting with low level calls and i want to revert the transaction made by low level call, if i didn't get the desired result. Is it possible?
(bool success, ) = ...
- 69
1
vote
1
answer
216
views
Why Golang was chosen to implement ethereum protocol?
I know there are many implementations of the Ethereum protocol, i.e. the first implementation in Python, or other implementations using C++, C#, and Java. As go-ethereum has gained lots of attention ...
- 494
0
votes
1
answer
52
views
Mismatch in `accessList` between Geth and Nethermind
Access Lists were introduced in https://eips.ethereum.org/EIPS/eip-2930, and one of the design decisions was to support duplicates "because it maximizes simplicity, avoiding questions of what to ...
0
votes
0
answers
83
views
approve spender to swap
i'm trying to swap using 1inch aggregator api and when i try to swap, it says
"Not enough allowance. Amount: 4600000000000000. Allowance: 0. Spender: 0x1111111254eeb25477b68fb85ed929f73a960582&...
- 69
0
votes
1
answer
33
views
Dose contracts must be deployed?
I see js programmers compile and call solidity contract without actually deploying it using hardhat and/or similar tools. Do they really can use the contract without deploying on the chain(like swap ...
- 69
0
votes
1
answer
238
views
1Inch with flashloan provider
Is there a way to trade on 1Inch using the API and flash-loaned balance. If it is possible please give me some info. I was seeing the DOC to find how to integrate the flash-loan provider with 1Inch ...
- 69
1
vote
2
answers
405
views
UniswapV2's equivalent of getPair and other functions
i see uniswapv3 quoter or factory or router contracts doesn't have getPair, getReserve and other similar ABI functions like UniswapV2. does UniswapV3 have Equivalent for this functions? or did they ...
- 69
0
votes
3
answers
734
views
REWARD!! PLEASE CAN SOMEBODY HELP ME ETH STUCK - I am a newbie trying to create a trading bot. and came across a tutorial, my 1.1eth stuck Metamask! [duplicate]
SORRY ABOUT THE GRAMMAR AND SPELLING I HAVENT SLEPT FOR ALLMOST 2 days BECAUSE OF THIS..
Here is a bit of a back story on why I have become a little desperate lately to find ways to make crypto faster ...
- 3
0
votes
1
answer
494
views
getAmountsOut and sushiswap user interface shows different result
Hello eth communities..
I am trying to interact with ethereum chain using programming and I'm using getAmountsOut to get swap path quote using sushiswap's contract. But the result in my vscode and ...
- 69
1
vote
0
answers
97
views
Can I make a contract call to refund the unused gas fee to a specific address instead of the msg.sender?
Can I make a contract call to refund the unused gas fee to a specific address instead of the msg.sender? I want to use this as a means of charging fees for my project.
- 21
1
vote
0
answers
75
views
Uniswapv2 "quote" ABI
I am trying to sign contractof Uniswapv2 on ethereum mainnet using "quote" ABI. the function is
quote(uint amountA, uint reserveA, uint reserveB)
I use c++ to make the raw transaction and ...
- 69
1
vote
2
answers
201
views
how does swapExactTokensForETHSupportingFeeOnTransferTokens work and its inputs
I tried many things on inputs but unfortunately I am just receving a gas error (the one that says would likely fail if continued)
How does the function input works exactly?
uniswapV2Router....
- 11
1
vote
0
answers
30
views
Reduce gas price?
I'm working on a sniping bot on uniswap, and i have a little problem : the first ones to buy are those who pay the most. Pretty logical, but I don't really want to pay 300$ in priority gas to be the ...
- 11
2
votes
0
answers
47
views
geth full node is too slwo.Only about 50 blocks can be synchronized per minute
geth full node is too slwo.Only about 50 blocks can be synchronized per minute
However I use snap mode to sync very quickly.
Unfortunately what I need receipts for all transactions.
this is my server:
...
- 21
0
votes
2
answers
106
views
transferring USDT from metamask to smart contract
I'm trying to transfer USDT tokens from my metamask account to another address(which is variable in smart contract) through method call.
if I use transfer method, I'm getting not enough balance(...
- 129
0
votes
0
answers
68
views
BSC Testnet and ETH Testnet, I want to copy/fork a contract in eth which is evermoon, but I always get an error with the gas and it always fails
This is the error it gives me, can you help me fix this problem, I adjust the gas limit, it started from 3000000, to 30000000, but still the transaction failed. I tried in bsc testnet using ...
0
votes
0
answers
40
views
How to verify and publish a contract address source code to withdraw erc2o tokens
Created a contract sometimes back while playing with eth contracts tutorials, by mistake I sent some some erc20 tokens only to later loose control of the creator address. Stuck between letting it go ...
- 11
0
votes
1
answer
25
views
I want to retieve data from contract A that has been already stored in the contract B by contract A?
dex.sol(contract A)
//SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import "./storage.sol";
contract dex1{
storage_contract public contractaddress;
constructor(address ...
- 71
1
vote
1
answer
312
views
Signing messages in cpp
I am trying to execute eth transactions from cpp. For that we need to be able to sign messages using Elliptic curve algorithm. I have found this repo, but output signature is different from what we ...
- 11
2
votes
2
answers
838
views
How to retrieve 1 eth I send by mistake to my smart contract token?
This is the contract as you see there's one eth there https://etherscan.io/address/0x19d71f00354ad302e89ca47e59b68917f9a871d7#code.
I still have ownership of contract.
My eth stuck in smart contracts....
- 23
0
votes
1
answer
458
views
Unsellable tokens bought on DEX: Smart contract to get back funds
I bought token via Uniswap which are not unseellable.
I read somewhere that we can deploy a contract on the same account of the token for swap the token in eth.
I wrote a code and before deploying it ...
0
votes
0
answers
112
views
How it works? 4 transactions in 1 block
This address withdraws tokens from different accounts as shown above.
His steps:
He sends BNB to the address where there are tokens to pay the token withdrawal fee. Gas price 60 gwei
Withdraws ...
0
votes
1
answer
36
views
Where can I get Goerli Test Ether? Can someone provide me with some? Thank you very much! [duplicate]
My address is: 0xDA866378188C6C455C6f624353cF5d3475484e4e
Thank you very much!
- 1