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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uint256[] array formatting

I'm currently trying to enable zk-proof verification on Ethereum. The zk-proof I'm using is an array of uint256[8]. I manage to verify it locally, but if I want to submit it to the Rinkeby testnet ...
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Forgot to add gas before sending Crypterium. What can I do?

I tried to send about $120 worth of Crypterium from Etherscan to my wallet and forgot I didn’t have ETH to use for gas. The transaction has been stuck on “pending” for weeks now. Is there something I ...
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Etherscan API for how to get pending transactions? [closed]

i want to get pending transaction from address with an etherscan API.
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How to understand supplies from smart contracts

I would like to understand how is total supply calculated and how could I know how much is circulating for particular token. I will just use random token for example https://etherscan.io/address/...
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Can a contract address have both ERC20 and ERC721 transactions

Some addresses on Etherscan like this one show both type of transactions (ERC20 and ERC721) on Etherscan. So, does that mean that both standards can be implemented at the same time for a token?
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Etherscan showing 0 holders

I created an ERC20 token and deployed it using Remix IDE. My smart contract is available here: https://etherscan.io/address/0xdacD69347dE42baBfAEcD09dC88958378780FB62#code I assigned all available ...
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Why some contract addresses show 0 supply and 0 holders on Etherscan

I have a an old list from December 2019 which showed the holders, supply and transfers in last 24h from Etherscan like here . Howvever while I was revisiting the addresses on Etherscan, there were a ...
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ROPSTEN - successfuly broadcast but there is not in etherscan site

I create a transaction hash raw and using by MyEtherWallet's send offline tools, broadcasting it. But when I go through the provided link in etherscan site, it shows me: Sorry, We are unable to locate ...
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Getting name/decemals of unstandardized token on Ethereum blockchain with web3.js

I understand how to call methods of name/symbol or decemals on ERC-20 tokens but what about tokens that do not have such.. for example this token here https://etherscan.io/token/...
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Can unverified contracts expose a public ABI?

I am trying to understand if there are unverified contracts that come with a public ABI. I was exploring contracts on Etherscan, and I was only able to find unverified contracts without source code ...
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Etherscan yul optimizer verification

Is it possible to verify contracts on etherscan.io using the yul optimizer? Example truffle-config.js relevant section: compilers: { solc: { version: "0.5.16", settings: { ...
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How do I get a list of tokens held by an Etehereum address?

TL;DR: wanted: a method that receives an address as a parameter and returns an array of token names/contracts/balances held by address. I'm aware of the fact that Etherscan API has a method allowing ...
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I have a Transaction Hash, how to get the readable Input Data?

i have a Transaction Hash: 0x9f46760404dd3075533e8360fe4beb0ba7210423af1f4a95a5c80defffe824b5, for how do i decode the "input data" easily? for example: https://www.blockchain.com/eth/tx/...
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Error while calling a function,

I created a Factory Contract which can create new ERC20 tokens with the parameters passed to it. Address of the contract: (Goerli Testnet) 0x482829Ba989fBC368F9A89dFf56cdF4036F39F28 I tested the ...
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configureMinter at USDC Token on Rinkeby

I have deployed the ERC20 token USDC to Rinkeby. More precisely I have deployed the proxy contract and the token contract. Then I called the upgradeToAndCall function to implement and initialize the ...
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1answer
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How to get all kind of transactions happend to/from an address within a time range?

I'm trying to get all transactions that occured to an address within a specified time range. The transactions shall include all ethers as well as token transactions done to/from an ethereum address. I ...
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1answer
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Latest block number and its transactions from etherchain.org

I am trying to get the latest block information such as latest block number and all its transactions details such as Tx hash, gas price, gas used, timestamp etc., from etherchain.org. I know Etherscan ...
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2answers
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How to get list of transaction for ERC20 token address?

Can anyone please help me to get list of transaction for ERC20 token similar to https://api-ropsten.etherscan.io/api?module=account&action=txlist&address=...
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Why are these high fee transactions not being mined?

Looking at the state of pending transactions on Etherscan I noticed two transactions that have a gas price much higher than that of the average network fee, yet they are not being mined. The ...
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Why is the compiler unable to generate Contract ByteCode and ABI when I try to Verify & Publish my contract?

Another dev no longer connected to our project deployed this contract, and I'm trying to Verify & Publish it on Etherscan now. What am I doing wrong? I do know that the dev who built this used ...
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1answer
77 views

How to pass 0 length array as parameter on EtherScan contract editor

suppose one of the function input parameter is bool[] testInput sometimes I want to pass 0 length array like this => [] instead of this => [true,false,true], how does it possible with etherscan.io. ...
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How can I replicate the Token Tracker etherscan page using python and etherscan API?

So I want to list top tokens and their associated stats, like on https://etherscan.io/tokens. Even simpler than that, how can I use the etherscan python API (or https://github.com/corpetty/py-...
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what is parent transaction in ethereum

I am learning about ethereum, when I learn I came across a term Parent transaction Hash I would like to know regarding this
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Compiler unable to generate Contract ByteCode and ABI when I try to Verify & Publish contract

Another dev no longer connected to our project deployed this contract, and I'm trying to Verify & Publish it on Etherscan now. Would really appreciate any help, as I'm at a loss. I do know ...
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1answer
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Where can I find compiler info to verify & publish an ERC-20 token on Etherscan when I didn't write the code?

I'm a developer working for a small startup with a standard ERC-20 token that we'd like to verify on Etherscan, but I wasn't the person who minted the tokens initially (that developer no longer works ...
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why is there no software downloadable wallet for ETH?

There is bitcoin core wallet..which you download on your computer and you have 100% full ownership of your bitcoin BUT etheruem NEVER has anything like this..most of the wallets are either on a ...
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Ropsten Etherscan shows 0 holders for my token

I created ERC20 compliant token on Ropsten testnet. I set in constructor that all of the token supply is added to my wallet address. When I open the metamaks I see that I have the tokens. Here's the ...
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How to determine the uniqueness of an internal transaction

How to determine the uniqueness of an internal transaction Example is this transaction: https://rinkeby.etherscan.io/tx/0xc756517a69239bddffe3e0cb07eba98d3ad0fae1b44fc936a0119dbaf7008942#internal ...
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Is there a way to use My BAT coins which I moved to Coinomi Ethereum wallet By mistake?

I didn't understand that Coinomi Ethereum wallet doesn't support BAT coins and I transfered my coin into that account. Is There a way to use my coins? or they are lost for good?
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Why token value is getting changed on Ethereum?

I have created ERC20 token with 18 decimals. From web3 (application front end) when I transfer 100 tokens, on etherscan it shows 0.0000000000000001 . When I call to get the balance then on UI it ...
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I have an ERC-20 token created. How does it get value now? [duplicate]

Ok, so a friend of mine helped me create an Ethereum token for me with a 1M supply. I call it the POTTA token. I have also started distributing my token to other friends with a tool that he built so I ...
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Can't verify contract on etherscan - unable to locate a matching bytecode (err_code_2)

As the title says I cannot verify my smart contract on Etherscan. I read all the solutions from similar threads with no luck. I'm getting the following error : Error! Unable to generate Contract ...
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What kind of bytecode is it in etherscan.io?

I have read some contracts from etherscan.io, and here are something that I don't understand: Why there are some contract addresses that do not have contract source code? Here is an example:https://...
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Get latest block info with gas price, block time etc., from etherscan.io

I am trying to collect information such as, 'fast': 140, 'fastest': 165, 'safeLow': 100, 'average': 120, 'block_time': 8.875, 'blockNum': 10021935, 'speed': 0.8993211072506393,....etc. on the latest ...
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Geth returns tx hash but blockchain

I have a Geth server on light mode, and implemented sending transactions based on web3.php project. Everything works well, except sending transactions. The code I am using sends from, to, and value ...
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How can I test someone else‘s ETH contract with only bytecode and ABI? [duplicate]

If I just have someone else's ETH contract bytecod an ABI, how can I test it's function?
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22 views

How does Etherscan compute mining times?

Etherscan identifies the miner that mined a block and the corresponding mining time. How does Etherscan compute the mining time? It seems that the mining time of a block is not the difference between ...
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1answer
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Verifying Proxy contracts on EtherScan

How one can verify a proxy contract, like OpenZeppelin Upgrade Proxy, on EtherScan?
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ENS on Rinkeby - Network does not support ENS?

I was able to register the ENS domain on Rinkeby, as the network supports ENS. My TX: https://rinkeby.etherscan.io/tx/0xd42b64ab03387d7ca405e7ba7b85ce893444a141e7a7de174f0361e2c4231674 My subdomain: ...
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1answer
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How to query Cryptokitties metadata from Etherscan

I;m trying to query a Cryptokitties token metadata from Etherscan and I need to give two values: _tokenId (uint256) and _preferredTransport (string). What are possible value for _preferredTransport?
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Transaction posted in “internal transactions” how do I add it to my wallet?

I transferred ETH from bitbuy to my ledger without realizing ledger did not support contracts. The transaction is posted on ether scan in internal transactions. I’ve contacted bitbuy and ledger both ...
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Etherscan Forked Blocks' Reorg-Depth is Incorrect?

I suddenly found there is an reorg happened today whose depth is 3 on Etherscan.io here. The uncle blocks is at height 9919331 and the hash is ...
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1answer
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Is transaction history available as a part of the blockchain implementation, or do I have to implement saving token history myself

I am implementing a CryptoKitties style of ERC721 tokens, to be deployed on Ethereum. But I am not clear how to implement the transaction history of the individual token? For example all the ...
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1answer
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On Etherscan, what is the difference between a failed transaction that says 'Reverted' and one that says 'Execution Reverted'?

On Etherscan, a failed transaction will provide a reason for failure. This can be Reverted, Out of Gas, Bad instruction, etc. However, there seems to be an inconsistent message on different testnets. ...
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which client produced the gasUsed on Etherscan?

There are many EVM implementations, such as js-EVM, Py-EVM and geth. So I was wondering which EVM implementation generated the gasUsed on Etherscan (i.e., the gasUsed got by using web3) ?
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Can someone explain Block 9193687: Why are there so many zero gas price transactions included?

Block 9193687 (Link: https://etherscan.io/txs?block=9193687&p=1) contains 79 transactions, of which 75 have a gas price of 0. These transactions are also not all from the same address. How does ...
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Someone sent me ethers in multiple transactions and took away my matic tokens nd those ethers

Someone (address: 0xc18842D634A683e6Ea5392e3f9f23a6966C88371) sent me Ether in multiple transactions and took away my Matic tokens and those Ether were sent to another account(address: ...
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Geth returns txhash of sendTransaction() but nothing is broadcasted on Ethereum blockchain

I have a strange issue with Geth. The code I've written is based on web3.php and worked well up to now. Currently, I'm testing sending ETH via sendTransaction() method. The operation finishs and I ...
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1answer
85 views

Etherscan api: how to get transaction fee?

For example: open this https://etherscan.io/tx/0xcb1e3530950cf2c43a307bcb5645ae71a12c76a60831617badd04aea3efe68aa It's a random one I see these infos on webpage: Gas Limit: 136,500 Gas Used by ...
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Proper way to fire smart contract function passing an array with web3js

I'm using web3js version 0.20.7 The smart contract originally had a function (called whiteListAddress(address _address, bool value) ) that took an address and a boolean value, which was called like ...

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