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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 verify Contract Source for Multisignature Wallet at etherscan.io

I was checking MSignature wallet events and had noticed, that it doesnt shows properly. I checked gnosis wallet contract and found out that it compiles with elder solidity version. So I had made ...
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How to deploy smart contract with visible source code (etherscan)?

I'm trying to deploy a contract to the rinkeby (hope that thats the network to use for beta testing). Deploying worked with the command truffle migrate --reset -f 2 --network rinkeby. Unfortunately,...
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Ethereum (Java) API

has anyone a good suggestion for a well-documented Ethereum API that is not limited by requests and allows to gather all information about token (transfers)? Basically an api that provides ...
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Ethereum-based project analysis [on hold]

I should make a quantitative analysis on some ethereum-based healthcare project (as MedicalChain,for example) and I need some tools to analyze ethereum network contents. Honestly, I don't know where ...
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transaction failed and cancelled [on hold]

Somebody please help, I withdraw from an exchange, but the ether not arrived on my luno wallet. I try to contact the exchange, he said the transaction is complete. And in my exchange account it was ...
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2answers
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Constantinople fork: my local Ropsten is not on the same branch of Etherscan

With the Constantinople fork few days ago (Oct 2018) my local ropsten node is not the same as Etherscan. I have geth 1.8.3-stable my node: block hash of 4248333 is 0xb24b6a6... ropsten....
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I have a problem with my crowdsale it doesn't work with 8 decimals [on hold]

Crowdsale external : https://kovan.etherscan.io/address/0xd7d36ea522a3abcc6001d6cd31fc98f254db18ac I have a problem with my code in solidity. This code works with 18 decimals, but with 8 decimal it ...
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21 views

Is it possible for the miner of a block to be address 0x0?

Take a look at this transaction: https://etherscan.io/block/5305. The miner is listed as 0x0000000000000000000000000000000000000000. Is this reasonable? Did someone configure their node incorrectly? ...
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where does Etherscan gets account name from? [duplicate]

Where does Etherscan gets names of accounts from? Is it ENS? Token name ? Or do they collect input data from users? For example, this address bleongs to F2Pool : https://etherscan.io/address/...
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28 views

How to retrieve transactions' info such as gaslimit and gasprice from Etherscan?

This link shows the latest 500k transactions, and by clicking each one it opens a page with its info including gaslimit, gasprice, usedgas etc. https://etherscan.io/txs How can i retrieve the ...
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Can a Contract ABI change?

I am developing an app that is using the etherscan-api package. I use it to get the contract ABI. The problem is that I retrieve it via the API every time the function is called. My question is: ...
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weird transaction sending to self

see some weird txs calling self addresses, for example, the last 2(the first and second tx in this block) transactions, at https://etherscan.io/txs?block=6475251&p=2 https://etherscan.io/tx/...
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Deploy contract - have total supply but no token holder and balance

I deploy my contract to etherscan (rinkedby and etherscan). I have my total supply set but i can't see any in in network after deploy. I even copy the contract ceration code exactly from this ...
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Found a Telegram ETH scammer/theif's main wallet address on Etherscan with $150,000 worth of stolen coin. What can be done?

Someone in my Telegram Telcoin group that I've talked to for months say they were a victim of ETH theft by a known ETH scammer in Telegram. This person sent me proof of pictures they took of ...
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29 views

Get contract information from transaction information?

This might be a simple question. Let's say I have the transaction hash: { blockNumber: "6214286", timeStamp: "1535248365", hash: "...
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1answer
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How to check the total number of token holders in Etherscan?

I would like to see if all the tokens for a book have been bought. The link in Etherscan is here. As I can see, there is a total of 1000 tokens but there is only 12 addresses owning those tokens which ...
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1answer
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Why won't remix finish launching all of my libraries?

I've run into an issue. I have a contract with a hierarchy of libraries (some lower level libraries import higher level libraries). All libraries are ultimately imported by our main contract. ...
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Retrieve function calls on a smart contract

So i have a simple smart contract that sends an event whenever a function is called, something like this: event DidSomething(uint taskId); function doSomething(uint _taskId) { taskId = _taskId; ...
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Where can I see the transaction which moved funds from a destroyed contract?

I got this external account from which I called a function of this contract which subsequently called selfdestruct and sent all the funds to the caller. Where can I see the tx making this transfer? ...
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Event handling confusing

Given is: pragma solidity ^0.4.24; contract changeSomVal{ address owner; bool test; event showBool(bool showBool); constructor() public { owner = msg.sender; } ...
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29 views

How can I reverse non transmitted transactions?

I made some eth transactions. They never transmitted. Now I cannot find them to cancel and my wallet appears to 1. not functioning and if I try a new transactions, it gives a message that I have 0 ...
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1answer
47 views

Inability to verify contract with ABIEncoderV2 on Etherscan

Yesterday I deployed a contract to Ropsten (https://ropsten.etherscan.io/address/0x1fe59c223fa4e9781237f0f49a15ca598069cc30) that relies on V2 of the ABI encoder. Thus it includes statement pragma ...
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35 views

Error when verifying signed message on Etherscan

Why is it that my message on etherscan can not be verified correctly? I always get this message: I'm sorry! Signature message verification failed
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1answer
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ether faucet error whenever i am trying to get ethers for rinkeby testnet from https://faucet.rinkeby.io/

when ever i am trying to get ethers (rinkeby) from https://faucet.rinkeby.io/ it is giving me this error. Faucet offline: context deadline exceeded even without entry my url it is giving the error. ...
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1answer
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Can someone imitate and create a fake erc20 contract? If so, how can we identify a contract?

If a project A deployed a erc20 token contract Mytoken, can a scammer create another Mytoken with some internal data modified (e.g., founder address)? Can etherscan identify such fake contracts? Or ...
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I cannot verify contract on etherscan

I cannot deploy my contract so I test with simplestorage but I cannot verify it either. pragma solidity ^0.4.24; contract SimpleStorage { uint storedData; function set(uint x) public { ...
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Ethereum chain data size (GETH w fast sync)

Etherscan provides this statistics, about the chain data size with fast synchronization. I cannot understand if it refers only to the blockchain size (i.e. block headers + block bodies, i.e. ...
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Etherscan Nonce & Position [duplicate]

I was looking at a transaction on Etherscan and i noticed this I understand that nonce is to keep track f the order of transactions of a certain address. But i don't know what position is.
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What does total number of blocks per day mean in Etherscan?

I tried to figure out what does total number of blocks per day means here and on the Internet, but i failed. For example, the number of blocks on 26 Aug is 5947 [here https://etherscan.io/chart/blocks]...
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How to retrieve holdings by address by token? [duplicate]

One can find on etherscan, for any token, the list of holdings by address. I would like to retrieve this info programmatically. Does the etherscan API enable us to do this? If not, what is a good ...
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2answers
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How accurate are Etherscan's internal tx's on Rinkeby for Oraclize calls?

I'm trying to optimize my smart contract and am breaking down where the gas is being spent. Each execution for one function costs me about $5 in gas. I looked at Etherscan and in the internal tx's it ...
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1answer
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etherscan api token name and symbol not shown,is this bug for etherscan?

http://api.etherscan.io/api?module=account&action=tokentx&address=0x4e83362442b8d1bec281594cea3050c8eb01311c&startblock=0&endblock=999999999&sort=asc&apikey=YourApiKeyToken I ...
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1answer
50 views

Contract calling own function emit event?

Does a contract calling a function defined within itself cause an Event to be emitted? Etherscan is not showing events emitted when a function is called using sendSignedTransaction(), despite the fact ...
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How to add website link to erc20 token on etherscan.io

How can we add this official site link to our deployed contract? Like in the image below: Here is my deployed contract address: https://etherscan.io/address/0xab73a739729a21b2299761408507556d2719af89#...
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Solo mining run out of HDD space miner found solution is everything lost?

I have only one rx 580 card and just setup solomining on my pc without any advanced settings bios changes etc My OS is Windows 10 100% noob here so please be more descriptive with your answers What ...
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Started getting EventStructWrongData warning in my ERC20 Token Code

I suddenly started getting EventStructWrongData (very low-severity) warning in my Ethereum code in Etherscan. It was not there before, so how come it started showing up all of a sudden? This is the ...
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My transaction is pending and it seems like doesnt execute the transaction at all?

I wanted to transfer ERC20 tokens from MEW to another ERC20 token wallet. It seems like not moving. Now my transaction is pending and it doesn't showing up in myetherwallet as a pending status. Can ...
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Calling a contract from another contract leave transaction pending forever

I am developing a DApp on the Kovan Network on Remix and I am having trouble understanding the problem. I am tring to call the Wrapped Ether contract (WETH : https://kovan.etherscan.io/address/...
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1answer
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Store ABI Value in var

I've finally managed to get my web3.js to work.. I did this only for the purpose to display one specific value on my website.. I'm not so good with jquery and hope you guys can help me out. This is ...
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Is there a way to get enode:// addresses of etherscan and infura nodes?

How can I get enode:// addresses of Infura and Etherscan nodes? Both mainnet and ropsten ones preferably. I would like to add them to my nodes peers list to be able to sync better. Thanks!
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Where do I find the “constructor arguments” for a contract deployed with Remix?

When try to verify token, I dont know what to put in for this line: Constructor Arguments ABI-encoded (For contracts that accept constructor parameters) I made token after looking at a YouTube ...
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What the “Time LastSeen” meanings?

If you check for all of pending transactions details, you will see the "Time LastSeen". Could someone explain to me: What the "Time LastSeen" meanings? What the differences between "Age" of ...
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why this contract can successfully do the transfer()

I am reading the source code of this erc20 token: https://etherscan.io/address/0xfdfd5db568f2ecf9b06a16116b9201b0500735b4#code the code is like this: contract VelixIDToken is ReleasableToken, ...
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Is there an API for looking up ENS records?

Currently I'm using this to do ens lookups: https://etherscan.io/enslookup But is there a public API I can use to do queries to see what each ens goes to?
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Can't find broadcasted transaction

I'm trying to broadcast a transaction hex: ...
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Etherscan: Verify and Publish Source Code - Error! Library Name and Address was provided but not used in the contract

Tried to verify my Smart Contract on Etherscan for Ropsten. Smart Contract is a library which actually also imports another library (which is already verified). Getting following error Error! The ...
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1answer
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Contract NOT created when using “new” on testnet

I've got a contract which one of his functions creates a new contract in the following manner: (Solidity) function createCarrier() public { P2Carrier newCarrier = new P2Carrier(msg.sender); ...
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Transaction done, but nonce does not update and call to a function returns zero

I've used web3py to deploy a contract and send some transactions to it. I calculate the nonce this way: nonce = web3.eth.getTransactionCount(account, "pending") When I deploy the contract, ...
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How to use “etherscan” to push a raw transaction without running a node?

According to this answer, how to use etherscan to push a raw transaction without running a node? In this case, do not we need to install Parity or geth or any Ethereum client ?
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What's identification mark for a internal transaction?

I used Parity tracer, it return a lot of message with many opCode: CREATE, CALL, CALLCODE, DELEGATECALL, and SUICIDE. It may be 60,70 traces. But when you see in ropsten or etherscan, it show only 1,...