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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1answer
339 views

Distinguishing erc721 transactions from the response of txlist on etherscan

I am making some erc721 transactions. I can retrieve those transactions using the etherscan api like this https://api.etherscan.io/api?module=contract&action=txlist&address=...
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1answer
126 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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1answer
565 views

How do I execute the withdraw function to withdraw token from smart contract?

Total newbie here. So I deployed a contract and already did the flash loan, but now I want to withdraw the remaining funds that I deposited into the smart contract (for the premium fee). How do I ...
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1answer
1k views

How to get a pending transaction? I am using python with web3py

I am using the URL "https://mainnet.infura.io/v3/key". But I can't get a pending transaction. This is my code. pendingTransaction = web3.eth.filter('pending') I had an error like this. The ...
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129 views

Using Etherscan API to get the Token ID of a transaction

Currently, I am using Etherscan API to get the list of all transactions from a specific wallet using the endpoint: https://api.etherscan.io/api?module=account&action=txlist&address=...
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1answer
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Pending transactions got cancelled after wating enough time or they keep pending forever?

There are solutions out there to cancel a pending transaction, for example sending another transaction with the same nonce to substitute it. Also paying more gas to accelerate it or even pay to cancel....
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1answer
344 views

Verifying contract code on etherscan

This question will be very similar to this one, but I'm stuck and don't know what to do: Token contract source code not verified Anyways, my friend sent me 2 pieces of code, the actual contract code,...
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1answer
31 views

get TransactionReceipt Not found

I am coming across a problem where. I ask for the transaction Receipt but get not found in return. what I am trying to do is establish the created contract address, and obtain the receipt to see the ...
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Has anyone spammed the Bloom Filter?

I've seen a (hypothetical) threat scenario where a malicious actor could spam LOG operations to populate the Bloom filter (making it harder for external services to index events). I also read about ...
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Can I still list my token on exchanges if I have renounced ownership?

This is my first post here. I have deployed a ERC20 token and have a few holders already. I am keen to renounce ownership of the contract to build trust. However, will I still be able to list my token ...
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2answers
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Transaction disappearing

I'm working on developing an ETH wallet, and I ran into some weird behavior. I'm using nethereum and etherscan.io. I'm creating a raw transaction using nethereum and then I'm posting it to the ...
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1answer
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Transaction never appear on Rinkeby

I've signed a transaction with my private key and then used the sendRawTransaction function to send the transaction on the network, I got the Transaction Hash, but when I use that transaction has in ...
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1answer
6k views

Fail with error 'TransferHelper: TRANSFER_FROM_FAILED' By calling UniswapV2Router02 swapExactTokensForETH

I am trying to call UniswapV2Router02 swapExactTokensForETH function on my Solidity Contract. I got Fail with error 'TransferHelper: TRANSFER_FROM_FAILED' on etherscan. this is transaction url : ...
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How to parse Ethereum transactions to extract all the details that we see on Etherscan?

Please consider this transaction: https://etherscan.io/tx/0x800391d2328e82e2cea40fd2cf2600f505baeefeb568e5bd5e75ebdeddcdd888 When I fetch this transaction using web3.eth.getTransaction, I get the ...
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Is Trolls Token safe?

Using my limited knowledge in crypto and Ethereum blockchain, I verified the locked liquidity and renounced ownership on etherscan.io for this token specifically. The project itself seems to be dead, ...
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1answer
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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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1answer
28 views

Monitoring Ethereum Contracts for specific function calls - missing methods in ABI

I created a script to accept a contract address and watch that contract for specific "events." In this case, I want to check each time the Loot for Snail function is invoked on the EvoSnails ...
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1answer
19 views

How to obtain transaction creation time for Ethereum transactions using web3?

I am interested in analysing transaction latency in Ethereum (time it takes from creating the transaction until it has been added to a block). I have been looking at Web3 (link https://web3js....
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3answers
1k views

Not able to export to csv all transfer events of a specific contract on Ethplorer.io

I'm able to use the Export to csv function, but it's only giving me the most recent 1000 events. Any suggestions on how to get ALL (2100+) of the events in a csv file? https://ethplorer.io/address/...
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Approval but no swap SAITAMA using uni swap

I swapped my ETH for some SAITAMA using uni swap but right now it's just showing as I sent my ETH and it shows up as a success, what is going on here? the hash address is linked up on the bottom thank ...
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1answer
24 views

How to check a wallet's Wrapped Ether balance on OpenSea or Etherscan?

Etherscan shows transfers in and out of Ether, whereas Wrapped Ether (WETH) appears in Etherscan's ERC-20 transactions. Etherscan readily displays the current Ether balance of a wallet at the top-left ...
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1answer
23 views

Wrapped Ether balance disappears from wallet on Etherscan by conversion?

The following wallet on Etherscan shows 3 transactions of Wrapped Ether (WETH) being transferred in under the ERC-20 transactions tab, a large amount, but not how they are transferred out, assuming ...
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1answer
246 views

Confusion around AmoutOutMin with swapExactETHForTokens call

I don't understand the paramater AmountOutMin for this function. From the docs, it seems that the call will fail, if the amount specified by this parameter, is not transferred to the user. However, in ...
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1answer
688 views

How to bypass mempool

I always see a mark on etherscan called "Private Transaction - this tx bypassed the mempool." What is happening there and how does it work?
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1answer
24 views

Etherscan shows transaction from before the contract was created

I've deployed a contract to Rinkeby: https://rinkeby.etherscan.io/address/0x765bb02d0499255e69216c21312ff4bfb62e96e8 The first transaction is dated over 24h before the contract was created. How is ...
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1answer
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Lost Coins on Uniswap

I tried to swap HOKK coin for SEPA coin last night and the transaction did not go through. My coinbase wallet still shows the HOKK coins but when I look at the transaction it says success even though ...
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1answer
32 views

How EtherScan keep the complete track of NFT(ERC721 token) transaction

My Usecase is to get transaction hash and show from which to which wallet a NFT was transferred. but when i use getTransaction of web3.js it returns me contract address in to field instead of wallet/...
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1answer
2k views

Sweeping ETH from a 2 year old paper wallet, help?

I have a paper wallet from an ETH atm from 2 years ago. I am trying to sweep the funds onto a digital wallet. I have used multiple ETH wallet apps on my phone but none of them were able to recognize ...
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2answers
569 views

how to connect to blockchain via etherscan provider

Hello i am trying to connect to the ethereum network with etherscan as HTTP provider so users don't have to have a running node but i cant seem to find their provider-URL.
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1answer
153 views

Problem getting 'Normal' Transaction records from Etherscan.io API

I am using the "Get a list of 'Normal' Transactions By Address" method from the Etherscan.io API. The problem is that the results from the API are different than from results from the '...
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1answer
27 views

How do you transfer eth out of smart contract from etherscan?

I have eth on a smart contract from people minting our nfts. How do I transfer that eth out? Can i do it on etherscan as long as I'm signed into the address that uploaded the contract to mainnet? Here ...
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13 views

how to know all the specific ERC20 token transfers in the whole network

I thought all the token transaction should be through the token contract like below. token contract : https://etherscan.io/token/0x0c7d5ae016f806603cb1782bea29ac69471cab9c But there seems to be other ...
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Cannot Verify Contract - Forgot Compiler

I made contracts for a project. Unfortunately, in the middle of the project I got task which makes me need to rush things. So, after deploy contract using Remix on browser I decided to leave the ...
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1answer
96 views

Decoding transaction logs of Pancakeswap's router by web3.py

I saw this question, but there are contracts like the pcs's router which have no event defined in the contract, see this transaction for example. How can I decode the logs in such transactions?
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1answer
24 views

Understanding ethereum transaction

I'm doin my combing through etherscan and am coming accross transactions called "remove sniper" and "set remove from fees" what does remove sniper mean on the blockchain
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Trying to configure truffle-configure.js for truffle verify plugin

New to development. I'm trying to verify my smart contract on the testnet using the truffle verify plugin but unfortunately, I can't seem to configure the plugin in my truffle-configure.js file. Here'...
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1answer
154 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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1answer
2k views

How do I get the implementation contract address from the proxy contract address?

I'm using web3.py to interact with multiple unknown contracts, where I don't know beforehand if a contract is a proxy contract or the actual contract. I'm getting the ABIs for the contracts on-the-fly ...
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1answer
27 views

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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1answer
221 views

How to detect and replace the transaction details that stored in local when user retry the transaction with higher price using Metamask

For a web application i stored the transaction id of an activity. if the user retry the transaction with a higher gas price in metamask(in case of the transaction take too long, metamask gives this ...
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1answer
23 views

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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0answers
43 views

Sent Ethereum from MetaMask address to same MetaMask address

I sent Ethereum from my MetaMask wallet address to the same MetaMask wallet address. I basically sent the funds from myself to myself. The transaction is showing as processed on etherscan however I ...
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23 views

"Coinbase 6" instead of exchange wallet address showing in Etherscan transactions

An exchange wallet address created on an exchange like Coinbase or Kraken starts with a unique 0x address just like any other Ethereum wallet. But when you transfer out to another 0x address from this ...
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0answers
11 views

internal transaction not shown on etherscan API

Below transaction shows internal_txs in etherscan. https://etherscan.io/tx/0xa225d3144705f431f947964173f95f050c9efddb156474cadf7a6476d6716355/advanced#internal But same tx_hash does not give any ...
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1answer
51 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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Is etherscan/bscscan limited to the last 100K transactions?

I was exploring a contract transaction and I was not able to see the contract creation as last transaction, but I found that there are all limited to the last 100K transactions. I know that I can ...
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0answers
15 views

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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2answers
188 views

I found 4 very similar wallet addresses. How is this possible?

These are the addresses: 0x7cB57B5A97Eabe94205c07890BE3C1aD31E486A8 0x7Cb57B5a97EaBe94205c07890bE4C1aD31E456a8 0x7cB57B5A97eAbe94205C07890BE4c1aD31E486A8 0x7CB57b5A97eabe94205C07890beaC1aD31E486a8 ...
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1answer
61 views

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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0answers
86 views

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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