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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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Can't see the source code with the new Etherscan user interface?

everyone! A few days ago, Etherscan has updated their user interface - and now I have no idea, how to get the verified contract's source. Before it was located no the #readContract tab, but now there'...
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what is difference in ethereum transaction after constatanople upgrade?

I have heard that Constantinople update transverse the consensus protocol of ethereum from proof of work to proof of stake. So they claimed that this update could speed up the TPS(transaction per ...
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scatter confirmation for sign a transaction?

I have built an dapp. It's almost like twitter where the user can tweet and also use as a microblogging site in blockchain.I have used scatter as transaction signer for using my dapp. The real problem ...
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how to setup a ethereum private blockchain?

Does anyone know how to set up a private blockchain in ethereum network? is that possible to run a private ethereum node? I have seen forking of public blockchain like EOS into a private blockchain.i ...
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How can I store every credit or debit card payment transaction on an Ethereum blockchain? [on hold]

pragma solidity 0.4.25; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ ...
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How can I decode transaction input to know what method was called and what arguments were passed in (and arguments types)?

following to the approach explained here to use etherscan api from Python to get transactions info such as input How to retrieve transactions' info such as gaslimit and gasprice from Etherscan? ...
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how to get contract creation code (bytecode) from etherscan api?

I tried etherscan api to get the contract creation code (bytecode for depolying contracts). I tried both getContractABI and getSourceCode, but the return values are not what i am expecting. I need ...
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Possible to obtain a list of token transactions within a specified date range?

For example: Let's say I want to see the transactions for a range between January 1, 2019 - Janurary 15, 2019. I'm looking at the etherscan API but it doesn't appear to do this. It allows you to ...
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Last step of sending MultiSig transaction on Gnosis Safe

I have prepared multisig wallet using Gnosis Safe. There are 3 assigned addresses, which are required to sign every transaction. Everything look perfect and it should work out, but when I'm ...
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Is there a node-static.json file for swarm node?

As far as I am aware of a static-node.json is a file for P2P geth node connection on disconnect. I have tested that and It works just fine. I was, therefore, wondering if it is possible to have such a ...
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2answers
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verify and publish when using oraclize?

I'm using oraclize in my contract. import "github.com/oraclize/ethereum-api/oraclizeAPI.sol"; When I go to verify and publish on etherscan I get this error myc:4:1: ParserError: Source "github.com/...
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KBC to ETH transaction [closed]

I withdrew KBC from my HitBTC account to my countries local crypto app LUNO which only supports ETH. This transaction was sucssesfull however I can not retrieve it from my Luno account. They say it ...
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What does that Filter By means? in ropsten etherscan while deploying tokens on ropsten

I've deployed my token contract on ropsten etherscan. Sometimes it shows me some address besides Filter By what doed that filter by exactly means?
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Is there any way to get all token transfers of a specific block number?

I am looking for a way to get all erc20 token transfers with specifying block number only. For ETH there is already a way exists here. I have done some search and found this method to find transfers ...
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How to read the data from block?

In my smart contract, I am inserting plain text message. I can also update the message. After updating, if I want to see the previous message, is it possible? Can I see all the data in etherscan.io?...
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Confusion With Etherscans representation of an Address

I'm trying to get a list of unique addresses that have interacted with a contract. As well as some data included in the events of each transaction. In order to do this, I use the action=getLogs query ...
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1answer
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What are the advantage of verifying source code in Etherscan?

I deployed a smart contract in ropsten test network. Now when I try to verify the source code, I am getting some error. What if I do not verify it?
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What is this address and for what?

What is this address and for what? 0x000000000000000000000000000000000000bEEF
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1answer
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Does etherscan api support retrieving ERC-20 Token txns?

I use etherscan api. https://api.etherscan.io/apis I want to get ERC-20 Token txns (or Token Transfer Events) like this page. https://etherscan.io/address/0x57e7674b1c58a0edce5a62af228ab34f09c00fca#...
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Extract all transactions for a specific token for Ethereum

I would like to extract all transactions for the DNT token using the ether scan API. Is there a way to do this without providing the address for the token API? https://etherscan.io/token/...
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1answer
39 views

Ethereum extract transactions based on timestamp

I am trying to extract all transactions of Ethereum using the eth scan API. But I need transactions for specific time periods only. I tried running the API for all the blocks to try and extract all ...
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1answer
56 views

Ethereum transactions timestamp

Is it possible to extract individual timestamps of the transactions' execution time in a given block? The Ether-scan API gives only the timestamps of the block collation, doesn't mention anything ...
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34 views

Ethereum transactions full history

How do I retrieve the transaction history of ethereum? I want to get all transactions that include this crypto currency for specific time periods. I looked at the ethereum API, but it needs some ...
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1answer
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What does etherscan mean by “Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)”?

I'm inspecting a contract on etherscan, at the following URL: https://etherscan.io/address/0x5cb5f46a655c02889172323760d12d0e5d83cdaf#code At the bottom of the web-page, I see two sections: ...
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1answer
85 views

How to get all internal transactions from Etherscan?

Just like we can crawl all external transactions in Etherscan, Is there a tool/method to collect all internal transactions from there ?
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152 views

API for ERC20 token balance - EtherScan

Is there any API for ERC20 token balance of an address for a particular contract?
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My code compiles on remix.ethereum.org but not on etherscan.io please help! [closed]

I get this error " ParserError: Function, variable, struct or modifier declaration expected. function transferFrom(address _from, address _to, uint _value) public returns (bool) ^ " everytime ...
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26 views

Understand an online contract with no EVM bytecode avaliable

Could anyone shed some lights on the following contract? https://etherscan.io/address/0x27d6c4cb2551799a143e1a3291ae002b8c8aa078#code I am quite confused about what's going on here. Why doesn't the ...
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1answer
32 views

Get all the identical contracts for a given contract

I am aware of the "find similar contract" function on etherscan.io; however, it seems to only print out the top 500 identical contracts, with the time ascending order. For instance, https://etherscan....
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What's the meaning of “similar match” in source verification? [closed]

I'm looking at a contract that shows an orange badge and reads Contract Source Code Verified (Similar Match), providing a different address (with the same code). Does anybody know what this means? (I ...
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1answer
38 views

Signed Message Verification failing for signed messages with multiple passes

I'm using web3 to verify signed messages using the code below: web3.eth.accounts.recover(message, signature); I'm testing against the list of publicly verified signatures on EtherScan - https://...
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2answers
48 views

Understand a smart contract semantics

I am writing to understand a smart contract which seems quite "meaningless" to me. The contract is at (https://etherscan.io/address/0xd4fa166d5ffe8f78230fc05e6850881dc08b2da2#code) but indeed over ...
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How to extract “runtime” bin from a EVM bin found on etherscan.io

I would like to extract the runtime bin from the EVM bin that can be found in the etherscan.io. For instance for this famous contract (https://etherscan.io/address/...
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Etherscan Verifying Contract Code: Error! Constructor arguments provided but might be unncessary because source code contains a public constructor

I'm trying to verify my solidity code through etherscan but it gave me this Error! Constructor arguments provided but might be unncessary because source code contains a public constructor. Tip: ...
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3answers
28 views

Transfer ETH using third party

I want to transfer ETH from an individual address to another address. So is there any API provider who can send ETH from single Address to another address. Also If I setup Web3 in windows machine ...
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1answer
185 views

web3.eth.getBalance(…).then is not a function

var Web3 = require('web3'); var web3 = new Web3(new Web3.providers.HttpProvider('https://ropsten.infura.io/v3/5db0a2fb8a8948fdbe57bb19eecb5674')); web3.eth.getBalance('...
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1answer
56 views

'Runs (Optimizer) ' and 'Optimization' while verifying source code on Etherscan

This is about the parameters that we need to provide at the time of source code verification on Etherscan. I have a bit idea about it but i am looking for some deep and clear explanation. So my ...
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1answer
46 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
243 views

How to hide my eth balance [duplicate]

i want to hide my eth balance from myetherwallet, etherscan , ethplorer .how to hide my eth balance in my ether wallet , etherscan , ethplorer. any methods available, please reply thanks
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1answer
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Fail to verify source code on Etherscan using API with constructor arguments

I am trying to verify source code on etherscan using API listed here. I have successfully verified the simple contracts (without constructor). Now I am trying to verify a sample contract with ...
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1answer
58 views

Why do compiler version and version in the source code not fit together for some verified contracts on Etherscan?

I found this verified contract on Etherscan: https://etherscan.io/address/0xd7a27d8d58f0c9e378fb3cb2816bde94c5e34059#code Etherscan says, it was compiled with solc version v0.4.14+commit.c2215d46, ...
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1answer
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Ether is not reflecting in my Metamask account

My friend has transferred me some ether to my Metamask account but the ether hasn't reflected in my wallet. But in the ether scan, it is showing that my transaction was successful. What can I do to ...
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1answer
24 views

Reading Ledger from etherscan API vs Emitting Events

Consider the following function from a solidity Contract: function createProduct(uint _price, string memory _desc) public payable{ emit UserLedgerUpdated(_desc, -1*int(msg.value)); } I want my ...
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32 views

Issues while sending raw transaction for calling smart contract methods?

let provider_url = "https://ropsten.infura.io/v3/d5bca90ec3084aee8abd468fdf876a11"; this.web3Provider = new Web3.providers.HttpProvider(provider_url); window.web3_ = new Web3(this.web3Provider); ...
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1answer
26 views

Tokken Holding on coinbooks.io

I put my private key on etherscan.io and retrive my public adress and put it on coinbooks.io for watch. In the token holdings i see an another adress with a high value of tokkens. haw can i ...
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How to get the timestamp from the latest event on the etherscan.io apis

How to get the timestamp from the latest event on a contract using the etherscan.io api ? I'm using the getLogs call this way: https://api.etherscan.io/api?module=logs&action=getLogs&...
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415 views

REMIX: ParserError: Expected identifier but got 'payable' address payable target

Hello i have the follow contract: https://pastebin.com/dQJY55hs I want add this code tu the code above: constructor(uint _totalSupply) public { totalSupply = _totalSupply; balanceOf[msg....
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1answer
48 views

make a contract send a percentage to a specific wallet (always)

how can I make a contract send a percentage to a specific wallet (always)? Example that whenever a transaction is made from this token the 1% go to X wallet. Thank you. Ok felix dolderer thanks for ...
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2answers
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How to distinguish a “ether pay” transaction with a “function call” transaction

So basically we can find many transaction histories within each block, like this: https://etherscan.io/txs?block=1506816 So my question is that, since on Ethereum we can do the following four kinds ...
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1answer
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What are all possible values of txreceipt_status?

I was wondering what are all the txreceipt_status possible statuses. I was investigating some blocks and noticed that some statuses are empty like: ' ' or have '1'. For both of those, transactions ...