Questions tagged [etherscan]

Etherscan is a search engine that allows Ethereum blockchain users to look up, confirm and validate transactions that have taken place on the blockchain.

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103 views

amountOutMin does not work

I has set this amountOutMin parameter in my code, but the amount of token I received was still less than it. Why is it like this? The transaction is https://bscscan.com/tx/...
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Strange error on Mumbai's polygonscan

I have a write function to add an array of addresses, I put for example this: ["0xddC5f73aB04FbcE9fF79AA07D0A4196BD0285f46"] And the polygon scan (not metamask), says this error: invalid ...
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How to identify swap transaction with Moralis

I am making an app using the WatchedEthAddress class from Moralis. However I am unable to find any documentation on how to identify the swap transactions. Should I be looking at any specific field on ...
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Getting Ethereum amount from Ethers.js Contract Transfer Event

I am working on building a simple Twitter bot to tweet out sales that occur on an NFT's Smart Contract (https://etherscan.io/address/0xbd3531da5cf5857e7cfaa92426877b022e612cf8) by listening to the ...
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Using Web3.py to monitor a contract/address for pending transactions

I am currently trying to build a script to automatically interact with a smart contract once a certain transaction has been sent. I have the interaction part down but am having difficulties actually ...
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OpenZepellin does not use inmutable in some contracts. Why?

I am reading the contracts of OpenZeppelin, in particular the ERC20.sol. I see that they could use immutable in the case of the name and symbol, but they are not using its. They they prefear a stard ...
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62 views

Found suspicious function in Coin Contract code

I'm new to creating cryptos and doing all the programming of it. Recently I came across a very suspicious token called BEAR that might be a Honeypot scam. Here's the function I don't understand and ...
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2answers
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Smart Contract Write Gas Fee

What is the price of interacting with your own smart contract(Write)? I am planning to deploy my own smart contract and I am planning ahead. I was interacting with a random smart contract on the "...
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1answer
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Hacked Eth Account - What do i do with my staked tokens?

Unfortunately my Metamask wallet was hacked today on the Metamask app which i'm devasted about. I tried connecting Pancake Swap to it and it popped up asking for my words which i stupidly gave. The ...
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1answer
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i need help ethereum didnt send my full amout

any pls help,i wanted to send FTM {eth} from my meta mask to gate.io and on during the transacton its failed and i have not recieved my token back yet i was only given about 15% of what i sent it says ...
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Using Geth with External Drive

I'm using the command geth --http --datadir D:\NODE but it seems like It's a wrong command, because when I switch to Localhost network on my Metamask it doesn't show the balance but when it's on ...
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1answer
83 views

Metamask randomly sending funds from one account to a saved address

My Metamask just sent 1 ETH for absolutely no reason of my own, to another one of my saved wallet addresses in my address book. this makes absolutely no sense as I did not initiate the transaction ...
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Difference between smart contract and wallet address

I have list of addresses & I am trying to find out if the address is wallet address or smart contract address. I am using web3js. Is there any way to distinguish between smart contract and wallet ...
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466 views

Error: Transaction has been reverted by the EVM:

I have tried all sorts of ways but it's not working for me when i change my value to 0 it works fine the transaction gets submitted. But if i change it to any other number lets say 1, 10, 20 I get ...
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Etherscan SwapExactTokensForETH on Rinkby

I'm trying to test out swapExactTokensForETH on Etherscan Uniswap Contract I'm trying to swap Link for WETH First I approved the UniswapSmartContract using Etherscan Then I try to call swap ...
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How to know the revert reason before submitting a transaction to a smart contract using web3?

I am trying to find out the revert reason of a transaction that is expected to be reverted before submitting the transaction to a ERC-721 smart contract. E.g. The below contract has all it's pieces ...
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How to check if the ETH address is reported as fraudulent?

Is there any api that we check if an ETH address has reported as fraudulent in etherscan or any other similar services? something like Check Address api in bitcoinabuse.
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1answer
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I want to get Public key from transaction

I want to get public key from transaction. For example, TXID : 0x191095343fd26cbb4c58996aa6512d5cdf43281d565072bab8d0d5ea9e3d644e I have tried "Get Raw Transaction Hex" in etherscan and use ...
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Question about basics of PoW blockchain

some newbie question's in here: To solve the miner's problem in PoW (on both Bitcoin's and Ethereum's blockchains), miners should generate a hash that meets some of the conditions (for example, starts ...
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Decoding Ethereum Logs Best Practices

So given a hash, you can get only a partial overview of what the transaction did. If it was a purely ether coin transfer, the value field should tell you how much changed hands. But in more ...
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Moved RDT from BSC to ETH using bridge, byt he tokens are not missing

I tried to swap RDT from BSC to ETH using anyswap bridge and metamask. It has been three days and the coins are still missing. Here is the transaction on BSC Scan: https://bscscan.com/tx/...
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1answer
32 views

Transaction revoked but ETH went missing

A transaction I tried to buy an NFT was revoked but the ETH (0.5) is not returned to my wallet. Here's the hash: https://etherscan.io/tx/...
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1answer
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Place to hire Solidity dev for 2-3 day job?

Not sure whether this question is appropriate here. Please redirect me if not. I'm looking for a recommended way to hire a solidity developer for this weekend. I would like to have a script that can ...
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ERC-20 Token Transfer Error - Eth subtracted from contract but not added to a wallet

While testing NFT contract on Rinkeby I encountered a situation where I cannot transfer eth from my contract. I had 0.01 Eth on the contract and then I called transfer to withdraw 0.008 Eth (...
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1answer
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How to derive value from transactions ETH

When I use python web3 to get an transaction: w3.eth.getTransaction('0x0ae2e71023a5801e557472d9b58dee483a8617cff3afcdeae171889e0db70ded') I get: AttributeDict({'blockHash': HexBytes('...
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1answer
325 views

How to encode tuple parameters?

I found many tools to encode parameters online, but besides web3 and thus Etherscan, none of them supports tuples/struct. And my problem is I’m unable to find the correct syntax. So obviously : [['...
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141 views

How to use etherscan api to get the balance of an erc 1155 token from a particular contract

I there a version of the erc20 balance call that i can use to get the token balance of a specific address? erc20: (https://api.etherscan.io/api?module=account&action=tokenbalance&...
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1answer
32 views

Contract not showing the name, symbol, and supply

I am not able to see the name, symbol, and supply on the smart contract at ropsten. pragma solidity ^0.8.0; contract MyToken{ address public minter; mapping(address => uint) public balance; string ...
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My transaction from opensea is showing "Dropped" on etherscan. Gas limit was 125 gwei. (Last seen 2 Hrs ago) What do I do?

If the gas price goes down to ~125 gwei, will it be automatically replaced? Can I use "Speed Up" in MetaMask? I read something about a 3 hour time limit? It was dropped about 30 minutes into ...
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1answer
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incrementing and transfering to Holders

Hallo guys Every time i try to sell and distrbute to Holders i get reverted transaction Hash : 0x511a62a40ac43fef117bba410bb375eb67e5ae964c29f3f2d400c04fb0a79562 the Debug shows fail in the Sell token ...
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24 views

Eth Received from start contract not showing up

Noob here, sold my first nft on opensea but the ETH is not showing up in any wallet and is not in my balance. It shows on etherscan as internal txn but I don't have the funds. ...
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Does a transaction occur when I register to sell on the NFT Marketplace?

I was able to find transactions for NFT minting and trading on Etherscan. But I don't know where is the transaction about sales registration in Ethereum Network. When I register for sales at opensea, ...
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1answer
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bscscan contract argument data decoding

Let's take a look at this tx: https://bscscan.com/tx/0x9b7cde866e9fe9b9a1c636d0f9686ea5b1920c875d7fcd973baf847bc359c8a9 as you can see it's buying token through pancake swap: ...
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1answer
19 views

Array in contract is pre-filled with random accounts

Hi all I have a problem with my contract, have a look I use a players array to save every account that calls the enter function, the enter function is the only function that pushes accounts into the ...
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Where to get value and transaction fee associated with a transaction?

On Etherscan, there are two data points that I'm not sure where/how to get, whether it's through the Etherscan API or some other method. Specifically looking for "Value" and "...
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1answer
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Can't verify ERC721 that compiles in Remix

I have a slightly modified version of the OZ721, but gets rejected by Etherscan with the following: Found the following ContractName(s) in source code : Address, Context, ERC165, ERC721, ...
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1answer
81 views

How do you input the msg.value in frontend

How on earth do you input the value of a transaction? I have my entire frontend working because they all require 0 value, but my last function requires 0.02 ether and I can't get it to input in react....
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What is the complete specification for typing values into Etherscan write contract?

You can type in: addresses integers strings booleans bytes arrays of items 1–7 structs of items 1–7 Please fully specify all acceptable ways to type each of those into that box.
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Etherscan get ERC20 transactions with multiple transfers

I want to get a list of all ERC20 transfers of an address for a specific ERC20 contract. I am using the following Etherscan query: https://api.etherscan.io/api?module=account&action=tokentx&...
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Sent ERC20 token to wrong address, which resulted in a wallet being created

A few hours ago, I tried to send UBX to their wallet on Ubikiri.com. I clicked "copy" for the address and it did not copy. What I ended up pasting into the recipient address was a BSC20 ...
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21 views

Getting ERC20 tokens name and contract

for trading on uniswap i need to have a list of token addresses and their names. I am aware that uniswap may have a lot of fake tokens. Is there any API i can use to fetch token names and addresses? ...
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1answer
62 views

Stuck transaction after sent a "self" transaction

I tried to buy an item on OpenSea, with low gas. Since the transaction was stuck, I sent an "self" transaction: 0 ETH and higher gas fee, and same nonce: https://etherscan.io/tx/...
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2answers
362 views

Use Uniswap V3 SwapRouter on Etherscan

I am trying to interact with Uniswap's SwapRouter smart contract directly on Rinkeby Etherscan, but with no success. I would like to swap ETH to DAI or ETH to WETH for example. Here is what I am ...
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Error creating contract after getting contract ABI from Etherscan API

I am trying to get the contract ABI using the Etherscan API, and then create a contract instance and call a method using web3.js. I am able to get the ABI from Etherscan but when creating the contract ...
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1answer
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Why does Uniswap V3 tick to square root price formula not match actual values from Etherscan?

Trying to learn how Uniswap V3 works, and was reading through the whitepaper. Supposedly, the formula for getting the tick from the current square root price should be: The whitepaper says that the ...
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1answer
207 views

brownie cant verify my contract on etherscan

I am trying to verify a contract (yearn-strategy) that uses the openZeppelin library, other yearn files and a few interfaces for external contracts. The contract deploys just fine but the verification ...
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Need help with ABI Encoding for smart contract verification (Polygon)

Help Lost here i need to encode ABI for smart contract verification ... here is a json code [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType"...
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Transaction not received, showing on Polygonscan but not Etherscan

This transaction is in status "Success" in Polygon scan. In Etherscan, it's not listed. It also hasn't been received in my wallet. It's been 24 hours. How does this happen and how can I fix ...
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Can a smart contract store the transaction info from a transaction it just executed?

The scenario is as follows: a transaction is executed from a Smart Contract. Can said contract store transaction info like the transaction hash and gas fees into itself? I want this information ...
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How do you launch an NFT collection from your own website?

I am wondering how NFT collections are launched on webpages like in these examples: https://www.alienoids.com/ https://www.dinosquad.io/presale https://www.wannapanda.com/ Whilst I'm curious to ...

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