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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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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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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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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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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17 views

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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26 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
21 views

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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17 views

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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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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26 views

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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37 views

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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43 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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32 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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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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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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37 views

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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54 views

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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30 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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46 views

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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Web3js - Internal Transaction Data (Event Logs): Token Transfers, Contract Creations, & Internal ETH Transfers

I'm currently recording transaction data via Web3js, while directly connected to a local Geth full archive node via IPC, and I was wondering if there was a more elegant way to record internal ...
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26 views

Does transaction hash in Ropsten ( testnet) deprecate ever?

I want to know whether transaction hash created in testnet stay forever or after sometime it gets deleted? Like in IPFS garbage collector deletes unpinned files after two weeks. IPFS is also ...
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Why use nodepools or backends?

I have a fundamental question about eth/blockchain infrastructure. I see several posts talking about the need for backend node infrastructure when launching a dapp/ smart contract. This infrastructure ...
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49 views

Not able to generate java wrapper class from solidity smart contract using truffle

I'm trying to generate java wrapper class of solidity smart contract using truffle but not getting wrapperclass.java file Here is an command which i've used to generate abi/Json of that contract ...
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22 views

Can i recover ethereum sent to and invalid address? [duplicate]

i've mistakenly pasted "2.5" in address field submitted a withdrawal request. can i get my coins back since the address is an invalid or the coin will be sent? I'm afraid i may loose my coins.
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Is QTUM is a coin or a Token?

According to Etherscan Qtum is a Token, holding supply with verified smart contract. But its official site contains its own protocol and integration mechanism. Is it still a token under ETH or it has ...
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33 views

Why am I getting “Invalid number of arguments to Solidity function” on Etherscan?

I'm trying to call a function via the Etherscan UI. I made sure the input data is correct, but I keep getting this error: Invalid number of arguments to Solidity function What's wrong?
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How to transfer ERC20 token from one account to another account but paying the transaction fee from third account?

I want to transfer token from account A to account B by paying transaction fee from account C.I have tried the following logic but token transfer from contract to contract mean contract transfer token ...
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Problem accessing variables stored in event log

I have succesfully implemented an event in my contract Portfolio: // Define eventlog for myEvent event myEvent(uint indexed eventDate, address indexed sender, myArray[] eventList, uint eventBalance); ...
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25 views

What is the ABI code of a map's getter function?

I'm currently trying to call Etherscan's API eth_call to check data from a smart contract. To do that, I need to pass the function ABI code and data. However, the data I need is stored in a map and I'...
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40 views

Is Egretia (EGT) is still Ethereum Token? Or It has been moved as a Coin to its own Blockchain?

Currently Egretia (EGT) is represented as a Token of Ethereum Network, but is there any changes regarding shifting from Token to Coin on its own Chain?
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Is “geth debug trace_2” on “Etherscan.io” a native geth output?

I am aware of the debug_traceTransaction function. On Etherscan.io there is an option to view transaction, called Geth Debug Trace_2, which produces output in a format that I need. The option is here: ...
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How does getDefaultProvider work in ethers.js?

From the docs: This creates a FallbackProvider backed by multiple backends (INFURA and Etherscan). This is the recommended method of connecting to the Ethereum network if you are not running ...
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35 views

Event Names not showing up on Etherscan

For some reason Event Names associated with transactions to my contracts aren't being shown in their Event Logs on Etherscan. Worth noting, this event in particular is not indexed. Any thoughts as to ...
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3answers
96 views

Publish and verify the source contract code in Ethscan. I tried it but it keeps failing. Can anyone help me?

https://etherscan.io/token/0xa0005edc8897fe1f9e2705a1682431497a504657 I followed other answers but could not succeed.
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95 views

Can we add custom data in ERC20 token?

Is there any way that we can add hex data in ERC20 transaction? Let s say we want to keep track of why we send the token and other detailed information. How can we achieve that?
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Etherscan API, the input field value of erc20 transactions is always deprecated?

I used to use ABIs to decode the input field of token transactions. I notices recently that the input field has always the value deprecated. You can try the example provided in Etherscan API page: ...
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Verifying a Token Contract with Interface

I managed to deploy a token contract with interface on Kovan Testnet. Now I wanted to verify the code. However this is a bigger problem than I thought. The contract got successfully deployed to: ...
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44 views

How big is the Geth Fast Node Currently?

I am trying to embark on getting all the contract addresses pulled from the Ethereum blockchain. From what I read, a fast node is all that is required for this (getting blocks->txns->contractAddress ...
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51 views

Get All Contracts from Blockchain

I am developing a large database of exploitable contract addresses and creating a website to host such a database for users to use to see if contracts are safe. Is there a way to get all contract ...
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70 views

Verify simple smart contract on etherscan

I'm having trouble with verification of smart contracts and some ERC20 tokens. The only tokens I was able to verify were the ones derived from ERC20Detailed. Here's a simple contract that I found on ...
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I accidentally sent a token to a token contract. Can I get it back? $MWAT [closed]

community! Instead of transferring my ERC20 token $MWAT (RED PLATFORM) to my wallet, I accidentally sent it to the contract itself https://etherscan.io/tx/...
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3answers
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How to get the actual time of occurrence for ethereum transaction in block

I used the API of Ethereum to download some transactions info. The timestamp is included, however I found the timestamp not mean the transaction time but the block which this transaction is located ...
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45 views

Web3.js is taking lot of time to return a promise

Web3 is taking time near about 5 minutes even after the transaction got 3 confirmations to return a promise from a smart contract which is deployed on kovan testnet. Please give some suggestion how to ...
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57 views

Is there an API to Download source code of verified smart contracts from etherscan?

There is same question on stackexchange but the answer to that question does not include the new api on etherscan which, given an address as input, allows you to download source code of that verified ...
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136 views

How to cancel pending transaction of ethereum from exchange wallet? [duplicate]

How to cancel pending transaction of ethereum from exchange wallet? It is pending for around 36 hours now. There is no available tx hash.