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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6 votes
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Etherscan: Effectively paginate `Event Logs` result

I am using Etherscan API for various Ethereum details. I need to find out the tokens transferred from a token original contract (let's say A) address to a particular address(let's say B). For this ...
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6 votes
1 answer
2k views

API resource for determining all address holders of a contract

I would like a RESTful API for viewing all addresses which holds a balance of a specific contract. It seems that etherscan.io deprecated this feature, or I'm looking at the wrong endpoints Are there ...
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4 votes
0 answers
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Using Web3.py to monitor a contract/address for pending transactions

I am currently trying to build a script to automatically interact with a smart contract once a certain transaction has been sent. I have the interaction part down but am having difficulties actually ...
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4 votes
0 answers
905 views

How to get public name tag by Etherscan api?

Does anyone know how to use Etherscan API to get public name tag of a contract? For example for this contract https://etherscan.io/address/0xdac17f958d2ee523a2206206994597c13d831ec7 I would like to ...
  • 141
4 votes
1 answer
635 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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4 votes
0 answers
235 views

What is the correct value to report for input data in this context?

On this transaction: https://etherscan.io/tx/0xae2630cdfbd0ca5292d272343c35dc8094365f2ecdc5c262c5639e79683f74dc, the input data is parsed and displayed as 'fund'. This is both correct and incorrect. ...
4 votes
0 answers
996 views

What is the easiest way to view transaction history if a custom token?

What do you think it's the easiest way to view history of transaction for a custom token ? Like A sent X to be B on XX/XX/XXXX. Especially for people who don't know about Ethereum. A tool like ...
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3 votes
1 answer
41 views
+50

Finalized blocks with 0 transactions and 0 block reward

This block was finalized 21 mins ago from now and there is one exactly like this waiting to get finalized Here is the link of that. Both of them had 0 transaction, 0 block reward, 0 extra data, 0 gas ...
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3 votes
0 answers
115 views

Contract Self-Destruct

Is there a programmatic(web3) way to know if an address has once been a contract and made a selfdestruct? I can see it on Etherscan's transaction page, but is there a proper way to check this?
  • 63
3 votes
1 answer
171 views

What is value of msg.sender when reading contract on etherscan or bscscan?

When I look at a contract on etherscan or bscscan, it is possible to read the contract, which basically just calls a public function of the contract. But what value is used for msg.sender when I read ...
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3 votes
0 answers
188 views

How can I do contract call transaction from Metamask qr code scan?

I have a payable function in the smart contract that takes some ether from the sender and does some tasks. I want to generate QR code for this contract call transaction so that user can scan and ...
3 votes
0 answers
2k views

How to get method name from transaction history (since the beginning and news in realtime)

My job is to get all the method name from the token contract transactions from the beginning and to display the new transactions in realtime. 1) Get all events For the moment I can display the "...
  • 141
3 votes
0 answers
914 views

Transaction not being mined within 750 seconds

On the main net, after getting the error from the title, by making sure it's not in pending pool, how long should I wait until I can safely retry a transaction? Thanks
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3 votes
0 answers
55 views

Get transaction in mainnet from layer2 rollup

With the coming of optimistic & ZKP rollups, I was wondering how we will be able to retrieve transaction data through etherscan.io generated from a layer2 solution. Let's put an example: Platform ...
3 votes
0 answers
344 views

ENS Name Look Kraken

I'm trying to get the ENS for addresses, so I thought initially to use the ENS on web3 from ens import ENS import web3 as w3 provider = w3.HTTPProvider('https://mainnet.infura.io/v3/...
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3 votes
2 answers
1k views

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 ...
3 votes
0 answers
709 views

Can not verify a contract on Etherscan (with a library)

I tested my first contract and wanted to verify the contract on etherscan: https://rinkeby.etherscan.io/verifyContract?a=0xc73adf8d3ee480e483f45c9c84ee88269407e95d For some reason I can not verify ...
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3 votes
0 answers
791 views

How to import contract source code in etherscan.io

I'd like to learn which solidity source code is being used when I create a multisign Wallet in Parity 1.6 My goal is to import that source code into https://kovan.etherscan.io/verifyContract?a=...
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3 votes
0 answers
425 views

Can't Verify Contract on etherscan.io or etherchain.org

I've deployed a contract, which I generated using Mist but I can't seem to get it to verify. At etherscan.io I keep getting the error: Error! Invalid constructor arguements provided. Please ...
2 votes
1 answer
60 views

Goerli Eth not showing up on metamask

I have tried 3 ways to get goerli eth - the alchemy faucet. The alchemy Goerli faucet. The transaction link on etherscan: https://goerli.etherscan.io/tx/...
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2 votes
0 answers
60 views

How to pass a 2-dimensional array to Etherscan?

How do you pass a 2D array into etherscan? This works in remix but not etherscan: [[1,2],[3,4],[5,6]]
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2 votes
0 answers
526 views

hardhat verify contract faild! Help!

I use command npx hardhat verify, and the log is: Nothing to compile No need to generate any newer typings. Successfully submitted source code for contract contracts/ygu/yguToken.sol:YGUToken at ...
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2 votes
2 answers
126 views

Sandwich Attack: Why do they use so high gas fees on sells?

I am currently watching into vulnerabilities and different threats for DEXes. I found some sandwich attacks or front running, that use moderate-high Gas Fees on Buy and crazy high Gas fees on the sell....
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2 votes
0 answers
133 views

How to listen to ERC721 transactions using ethers.js?

How can I listen to NFT minting transactions (ERC721) using ethers.js ?
2 votes
0 answers
289 views

Using etherscan.io to get transaction method name from events

I'm trying to retrieve the method name from the etherscan.io API. The method name appears in the etherscan.io reports, but I cannot for the life of me find any way to get it from the API. Etherscan....
2 votes
0 answers
76 views

How to connect wallet / set caller for Read Contract buttons on Etherscan?

When I use the "Read Contract" tab on Etherscan, it works even if I didn't "connect" by Web3 wallet. It seems to be reading the blockchain passively. The thing is, one of the ...
2 votes
1 answer
319 views

How to view contract source code from ABI, address and bytecode?

I have the address and ABI of a contract. I can also view the bytecode from that address on Etherscan but not the source code. Is it possible to get the contract source code using these information?
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2 votes
2 answers
300 views

I want to get Public key from transaction

I want to get public key from transaction. For example, TXID : 0x191095343fd26cbb4c58996aa6512d5cdf43281d565072bab8d0d5ea9e3d644e I have tried "Get Raw Transaction Hex" in etherscan and use ...
2 votes
0 answers
2k views

A Status code indicating if the top-level call succeeded or failed (applicable for Post BYZANTIUM blocks only)

When i try to swap from bnb to busd its working fine but when i try to swap between other coins is giving me error , also i try to swap from busd to other coins same error A Status code indicating if ...
2 votes
0 answers
2k views

Stuck trying to verify a smart contract through hardhat

I am trying to verify on hardhat an nft-tutorial by chainlink but am unable to. I have converted most of the code to hardhat compatible. The contract address on Rinkeby is ...
2 votes
0 answers
80 views

How to prevent NFT or Enjin Token copying?

So lets say someone mints an Enjin token pointing to a 3D model asset for a game. What prevents someone from downloading that same exact 3D model, and minting a new token that points to it? Are the ...
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2 votes
1 answer
358 views

How do I obtain the transfer logs of an ERC721 token through Etherscan?

Is it possible to get the transfer logs of a specific ERC721 token ID using Etherscan API? For example, https://etherscan.io/token/0x06012c8cf97bead5deae237070f9587f8e7a266d?a=587058#readContract I ...
  • 21
2 votes
0 answers
554 views

Get all transfers of a token contract from etherscan API with python

I am trying to pull out from etherscan api all token transfer from a particular token contract. Currently, I can pull data by manually going to etherscan token contract page - for ex cvc coin: https://...
2 votes
0 answers
266 views

How do I verify a contract that has imports on etherscan?

There is an answer from 2017 here saying that it's not possible but it's been 3 years since then so hopefully there is progress. My Vyper contract looks something like this: import ERC20 as ERC20 ...
2 votes
2 answers
7k views

Fail with error 'TransferHelper: TRANSFER_FROM_FAILED' By calling UniswapV2Router02 swapExactTokensForETH

I am trying to call UniswapV2Router02 swapExactTokensForETH function on my Solidity Contract. I got Fail with error 'TransferHelper: TRANSFER_FROM_FAILED' on etherscan. this is transaction url : ...
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2 votes
0 answers
50 views

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 ...
  • 21
2 votes
1 answer
5k views

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: ...
2 votes
0 answers
106 views

How to verify a contract in etherscan older than 0.4.11?

It seems that the verification feature of Etherscan supports contracts written since Solidity 0.4.11. I want to verify a contract written with Solidity 0.4.8. Is this possible? I'm wondering if this ...
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2 votes
1 answer
48 views

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 ...
2 votes
4 answers
257 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 ...
2 votes
0 answers
25 views

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)?
2 votes
1 answer
488 views

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,...
2 votes
0 answers
2k 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
2 votes
1 answer
76 views

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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2 votes
4 answers
2k views

Not able to export to csv all transfer events of a specific contract on Ethplorer.io

I'm able to use the Export to csv function, but it's only giving me the most recent 1000 events. Any suggestions on how to get ALL (2100+) of the events in a csv file? https://ethplorer.io/address/...
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2 votes
0 answers
596 views

Can you deploy a contract from a Ledger Nano S using Remix?

I have deployed a contract from a Ledger Nano S before by connecting to MEW and deploying using Bytecode and ABI of the contract. However I do not know what compiler version MEW used and so cannot ...
2 votes
0 answers
3k views

eth.getBalance(eth.accounts[0]) always 0 on geth console

I want to deploy smart contract on rinkeby test network. I create account in Rinkeby test network.And connect with "Ethereum geth node".I successfully funded "https://faucet.rinkeby.io/". I also check ...
2 votes
0 answers
148 views

BI Dashboard (Tableau, Qlikview esque) for Ethereum/Quorum?

Most of the ethereum transaction explorers (etherscan) I have encountered does not have snazzy analytics capabilities. For enterprise, there is a need to analyse (sum, count, etc) the data in the ...
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2 votes
1 answer
149 views

Tracking orders on 0x network

How are the various 0x network order trackers sourcing on-chain settlement data? My first assumption was that they were utilising the Etherscan API, however Etherscan have their own tracker, found at ...
  • 121
2 votes
0 answers
749 views

web3 1.0.0-beta example for etherscan websocket?

Does anyone have a working JS example for wss://socket.etherscan.io/wshandler? Or any alternative websocket providers, besides Infura? The reason I'm looking for Infura alternatives is it fails for ...
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