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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Recover parameters from failed transaction on etherescan

I have some failed transactions on etherscan that I'd like to investigate. An example is this one. How do I convert inputs like 00000000000000000000000000000000000000000000000000000001ae43e5e0 to what ...
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Etherscan and Token value [closed]

can you PLEASE tell me how to get my coin balances off of etherscan and on to say an exchange or on to metamask? I can not figure out how to do this it's driving me crazy! the balances are there but I ...
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Get emitted events of a a smart contract function using infura

I have used infura in my App.js to connect to the kovan network. Then I am creating an instance of the smart contract deployed on that network. Then I am calling a function on that smart contract ...
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Etherscan event retrieval. Topic

Here's the contract events I want to pull from the ropsten network. Here's how I constructed the event request event_request = ("https://api.etherscan.io/api?module=logs&action=getLogs"+ ...
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How to get type of a contract internal transaction? [duplicate]

I'd like to get type(create, call, ...) of a contract internal transaction, like [this page of etherscan.][1] However, I couldn't find it any responses and documents of web3js. I'm getting a contract ...
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Setting up listener using web3py

I'm setting up a proof of work contract. When a solution is found, the contract emits a Transfer event and the number that gets hashed with future solutions changes. I need to set up a listener so ...
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ERC-20 Token Smart Contract Redeployment

Hello everyone am wondering how can someone redeploy ERC-20 Token Smart contract thats already deployed? I have already deployed few contracts both on Ropsten Test Network and on Main ETH Network ...
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How can i simulate the write contract in etherscan using Web3.py?

I would like to use web3.py instead of using the etherscan write contract function available in ethercan.io, Is this possible? if yes can someone please show me a sample. The contract address of the ...
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Why is Etherscan's “Pending transactions” count so huge?

Etherscan's pending-transactions count has been in the 60k-80k range for a few days. Why is this? If I look at etherscan's current pending-transactions list, sorted by gas price, I see transaction ...
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Why are etherscan ENS events so old?

When I go to https://etherscan.io/ens, and then go to the "More" menu, and from there the "ENS Events" menus, all of the events listed are more than 320 days old. Is there a way to get recent events ...
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MetaMask - RPC Error: invalid argument 0: json: cannot unmarshal non-string into Go value of type common.Hash

I am using this code below and I got an error: await web3.eth.getTransactionReceipt(this.state.transactionHash, (err, txReceipt)=>{ console.log(err,txReceipt); this.setState({...
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How to download source code ( In solidity ) of already existing smart contracts on ethereum blockchain? [closed]

We are working on a project which requires smart contract source codes for analysis in ethereum blockchain. Can anyone suggest us how to download the source codes( In solidity) of various smart ...
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How to Download source code of existing smart contracts on ethereum block chain

We are working on a project which requires smart contract source codes for analysis in ethereum blockchain. Can anyone suggest us how to download the source codes of various smart contracts already ...
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1answer
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How would one find a list of transactions sent TO an address? [duplicate]

I am trying to write a script to audit the changing balance of an ETH address, but I cannot seem to figure out any way to find transactions where ETH has been sent to that address. I couldn't find an ...
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ENS Name Look Kraken

I'm trying to get the ENS for addresses, so I thought initially to use the ENS on web3 from ens import ENS import web3 as w3 provider = w3.HTTPProvider('https://mainnet.infura.io/v3/...
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1answer
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How can I Retrieve Wrong Transfer of Erc20 tokens [duplicate]

I mistakenly Transfer an ERC20 token to a scammer Like(I created the Token) then I saw the Write function on etherscan.io. Is it possible to transfer it back to my wallet or not and if it is possible ...
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How do I determine the data storage structure that corresponds to a specific storage address?

My goal is to understand the details of the 1st bZx exploit. I am using the State Changes section of Etherscan to help me accomplish this. Some state changes affect the storage of certain data ...
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Internal Trace Transactions Python

I've been trying to figure out the best way to get the Net internal/trace transactions using python for a specific transaction hash. I have read other topics on the forum that say that these are not ...
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What do the Type Trace Addresses on the Internal Transactions Section of Etherscan mean?

I am seeking to better understand the bZx exploit by following the Internal Transaction section of the exploit transaction on Etherscan click here to view. I am confused about what the Type Trace ...
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1answer
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Different block information for the same block number at different times

On web3.eth.subscribe('newBlockHeaders') I get notification and trying to get last block via saved block number earlier. It was happen with 9559839 block number on mainnet. First, I was get data with ...
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2answers
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Order of transactions in the same block

I am writing a Medium blog post about front-running and can't seem to find information about the order of the transactions in the same block. I have executed two trades, one with the lower fee, call ...
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how to send erc20 token without using smart contract abi?

How to transfer erc20 token without using contract or contract abi? The below script i have used to create Signed Raw Transaction to send Ether(ETH). How can i create Signed Raw Transaction to send ...
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Is there a tool that generates a PDF version of a transaction?

Etherscan provides a nice UI for viewing what happened in an Ethereum transaction, including internal contract state updates. Is there a tool or an API that takes an Etherscan link, or an Ethereum ...
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Why Etherscan is reporting negative token balances?

I am wondering if its possible a holder to have negative balances as reported by Etherscan. Bellow are the links for the cases that I spotted: KICK token holder ...
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1answer
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eth.getBalance(eth.accounts[0]) Shows me 0 balance though my syncing is still Running [duplicate]

I am using geth on windows with 1.9.10 version. I used geth --rinkeby --rpc --rpcapi="personal,eth,network,web3,net" command for launch my geth. I am on the Rinkeby testnet, i already transfer 3 ...
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API call to get a list of all transactions sent TO a specific address (not contract)?

I have used the Etherscan API call "http://api.etherscan.io/api?module=account&action=txlist&address=0xddbd2b932c763ba5b1b7ae3b362eac3e8d40121a&startblock=0&endblock=99999999&sort=...
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Import error when publishing source on Etherscan

I am attempting to publish my source code on Etherscan. When I compile, I get the following error. I assume that this callback is not reaching the destination. myc:3:1: ParserError: Source "...
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2answers
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Full Node Bigger Than Online Reports?

I am running a full node and I noticed that the amount of disk space it takes is larger than reports online. I use the command ./geth --syncmode full --rpcapi eth,web3,personal --rpc --rpcaddr 127.0....
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How do I create a raw signed transaction and write it in hex?

I am looking to send a tx through etherscan's pushTx function as seen here : https://etherscan.io/pushTx Is there a sort of template I can use to define addresses, token contract or ETH, gas price ...
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1answer
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Smart Contract overview ERC-20 instead of ERC-721

I have created ERC-721 standard but on etherscan (Ropsten) it's still showing ERC-20 standard in overview Below are my contract code, please share your thought if I'm doing something wrong. contract ...
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Wrong Vesting Smart Contract

For my project I created vesting contract. The contract codes and vesting contract codes are same with MATIC token contracts but in my vesting contract there is wrong. https://etherscan.io/address/...
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1answer
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what is the mining of block reward at Etherscan? [duplicate]

When I searched out some block on Etherscan, I found out some strange thing. For example, here is one of example: https://etherscan.io/block/9168614 Reward of this block is 2.18430490432165812 Ether ...
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Besides Etherscan, Are There Other Places to Verify/Publish Contract Code?

The title says it, but I also need at least 30 characters.
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How to connect to Etherscan Ropsten API using python

I want to connect to the etherscan Ropsten test-net with python: URL = 'https://api-ropsten.etherscan.io/api?module=contract&action=getsourcecode&address=...
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1answer
33 views

How to tell if an address is a multisig?

I'm looking at an address owned by an investor on etherscan and am wondering if it's a multisig. Usually multisigs are contracts and you can tell if an address is a contract on etherscan, but are ...
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Unable To Verify Token On Etherscan [closed]

I verified the source code but I emailed Etherscan to update my token logo and web site information and they denied me. They said I don't have a white paper and a visible team members with profile ...
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1answer
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Help understanding how to move coin

I participated in the now defunct Envion coin ICO. I really had a hard time figure out the transfer of coins, where my wallet was, and the basics of coins in general. I did not expect it to be so ...
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1answer
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Watching for events

How come sometimes events show up on block explorers in hex and sometimes to you can see the actual string name of the event in the logs. I ask because my event watchers on my front end only pick up ...
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1answer
50 views

Cannot verify Solidity contract code on etherscan.io

I am unable to verify the contract below on Etherscan. No errors in Remix. I tried all of the solutions recommended in answers to similar questions, which were: Remove the ^ in pragma Compile ...
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Retrieving the first and latest transaction date of a contract

Etherscan offers a time series of ethereum transaction of a contract address. Is there a way to retrieve this data? For example the duration mentioned here https://etherscan.io/address/...
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1answer
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Error: Uncaught [TypeError: Cannot read property 'ContractName' of undefined]

I am trying to get source of open source verified contracts and write into a file at my local folder. I could write only one file (of first address) but for the rest i am facing captioned error. ...
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1answer
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Invalid Address format - Etherscan.io APIs problem

I have download list of verified open source contract addresses's list and loaded into addresses[]. Now I want to download sourcecode/ABIs etc... of that contracts. Although, i have called setTimeOut ...
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1answer
49 views

Different address make same signature for one message

Is it possible two different wallets (address) make the same signature for one message? I have one message: '...
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49 views

Api to get total transfer count of an ERC-721 Token

I want to retrieve the total number of an erc 721 token's transfers/ transactions. I couldn't scrape the transfers value from etherscan as well e.g. given here https://etherscan.io/token/...
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1answer
22 views

what kind of Hardware required for run geth private chain for ethereum on windows?

i need to help to find out what were the minimum hardware requirements needed for deploy the private chain on ethereum.
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1answer
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Confusion regarding total number of ERC-721 Tokens

I have two questions: 1) I want to retrieve the list of all ERC-721 tokens. The main block explorer for Ethereum which is Etherscan shows 2,883 ERC-721 tokens on its website https://etherscan.io/...
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What is the best way to verify the comments in the contract code?

I have a contract that I want to be legally binding in traditional courts. It assigns rights, and for this I need legalese in the comments to describe the process. What is the best way to make sure ...
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web3.eth.getCode doesn't return the data shown on etherscan

For example, let's take contract address 0xdac17f958d2ee523a2206206994597c13d831ec7. Does anybody have an idea why the following two are totally different: The string returned from await web3.eth....
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1answer
38 views

Does Geth provide a private or public network?

I'm new to the Blockchain world, lacking experience and I'm looking for some assistance. I'm just syncing with ethereum network by using Geth and rinkeby network. by using this command: geth --...
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Generate new address, Send and Get transaction then Check transaction

I'm just starting in the ethereum and trying to build an app using Web3 and Nodejs. I'll need your lights so I can get any idea to know how to resolve those points: I have my own public address and ...

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