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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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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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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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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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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
29 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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30 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 I ...
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1answer
24 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
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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
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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
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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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1answer
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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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Address array is not returning any of the address

I have create the variables to store the list of address and the funds by every investor. In etherscan.io, When I tried to check the investor list I could not see anything. Could you please let me ...
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How can the discrepancy between ethernodes.org and etherscan.io/nodetracker be explained?

tl;dr: The difference of the node count on the mentioned sites are really high (atm 10,6k vs. 7,5k, yesterday 10,7k vs. 6,6k). How can this effect be explained? Also interesting: Why is the node count ...
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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
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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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Retrieving huge data using Read contract in MEW / Etherscan

I have a contract which may return around 30000 address. Will I have any issues like returing only the partial data ? If this is not the best way to retrieve the huge data.. could you please ...
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1answer
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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
27 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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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
230 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
28 views

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
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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
21 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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1answer
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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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1answer
23 views

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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1answer
124 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
34 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 ...
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1answer
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How Can I call contract's function from Java?

There is BizzleTokenSale contract. pragma solidity ^0.4.2; import "./BizzleToken.sol"; contract BizzleTokenSale { address admin; BizzleToken public tokenContract; uint256 public tokenPrice; ...
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1answer
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How to match the etherscan.io bytecode using the solc compiler?

Trying to do some simple sanity checks between the verified contracts on etherscan.io and the bytecode available on the blockchain for those contracts. I picked a random contract to test: https://...
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1answer
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why solidity 0.5.0 version code does not verify on etherscan?

The solidity version 0.5.0 at v0.5.0+commit.1d4f565a seems some issue while verifying at Etherscan.io The contract I deployed: https://rinkeby.etherscan.io/address/...
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2answers
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transaction fails due to out of gas in mainnet

Transaction fails due to out of gas though gas used by transaction is 22.32 % . What might be the reason ? I have give enough gas : 203000 wei. Here is the link of the transaction
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1answer
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Token totalsupply displaying zero at etherscan but displays correctly at remix

I verified and deployed a token contract using remix. The totalsupply displays correctly 80000000000 but at etherscan it displays the totalsupply as 0.0000000008. Summary [ERC-20] Total Supply: 0....
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1answer
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What is the recommended procedure to report potential vulnerabilities in a smart contract?

I was browsing etherscan's verified smart contracts (i.e. the ones with the source code attached), and I saw that one of the smart contracts contain (or at least I think it contains) a potential ...
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2answers
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Warning: “throw” is deprecated in favour of “revert()”, “require()” and “assert()”. throw;

my question is if "THROW" is deprecated then what i have to put instead throw in the following solidity code ? // This function creates Tokens function createTokens() payable { if(...
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What is driving occasional drop in number of transaction pending in the last few days?

Anyone can explain any events that trigger a sudden drop in pending transactions occasionally (refer to diagram below)?
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1answer
15 views

Ethereum Node I want to export transactions from a token

I have an Ethereum node running and I am wanting to export transaction history for a specific ERC20 token to a local database every 10 minutes. Does anyone have any suggestions on how they would do ...
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2answers
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Tokens on a Contract

Want to get tokens amount sent to my contract address on chain, but don't know address of token. Can I get through any function ? Any possible way to so ?
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2answers
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How to dynamically load contracts data with their ABI from etherscan API?

Im wanting to pull data from a smart contract I've loaded via user address and etherscan API for the ABI. But how would I go about programmatically adding all the functions from the ABI into my ...
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1answer
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etherscan request API limit [closed]

i want to know the limit request on etherscan API with API key, and limit if we go on paid service. thanks in advance.
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1answer
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can not find specific events and list events of the past the last 1day

I'm wrote this sample but I want to filter specific events 'unsealBid' and list events of the past (e.g. the last 1 or 2 days). const Web3 = require('web3'); const web3 = new Web3('https://mainnet....
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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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2answers
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How is it possible for 0x0000000000000000000000000000000000000000 to send out ERC-20 tokens?

Isn't 0x0000000000000000000000000000000000000000 a burn address where no one has private key? If that is the case, how can this address send tokens to other addresses? If you look at Etherscan's ERC-...
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How to find specific reason Ether transaction failed

Using Web3.py I am trying to deploy a contract to an Ethereum Ropsten Test Network. Every time I attempt the deploy, I print the returned transaction hash and take it to Etherscan.io to check on its ...