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.
196
questions with no upvoted or accepted answers
6
votes
1answer
2k views
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 ...
5
votes
1answer
614 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 ...
4
votes
1answer
160 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=...
4
votes
2answers
2k views
Error! Unable to generate Contract ByteCode and ABI
Having issues verifying my token contract on etherscan.io.
Receiving the following errors:
Note: Contract was created during Txn#
Result: Does not match the input creation bytecode found at this ...
4
votes
0answers
213 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
0answers
953 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 ...
3
votes
0answers
90 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/...
3
votes
2answers
416 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
0answers
677 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=...
3
votes
0answers
407 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
0answers
68 views
+50
Calculating Ethereum Gas Fees
How are gas fees calculated in account based model coins like ETH?
Let's say I own 10 ETH addresses with 0 starting balance. I receive 0.1 ETH payment from 10 people - each one sending a payment of 0....
2
votes
0answers
58 views
How to get token prices with UNISWAP API
I am using uniswap python api to get live token prices. I am using all the variation of the built-in functions. However, it does not give me the right value.
HERE IS MY CODE
address = "...
2
votes
0answers
27 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
...
2
votes
0answers
277 views
MetaMask - RPC Error: invalid argument 0: json: cannot unmarshal non-string into Go value of type common.Hash
I am using this code below and I got an error:
await web3.eth.getTransactionReceipt(this.state.transactionHash, (err, txReceipt)=>{
console.log(err,txReceipt);
this.setState({...
2
votes
1answer
154 views
How to show inventory tab on etherscan
Sorry, i'm newbie about ERC-721. I have deployed my contract and verified it. https://ropsten.etherscan.io/address/0x677f76d276355c382da948d2476da06cf5dc6219
But I don't see inventory tabs like other ...
2
votes
0answers
41 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 ...
2
votes
1answer
45 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
0answers
19 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
0answers
587 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
0answers
193 views
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]...
2
votes
1answer
598 views
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#...
2
votes
1answer
59 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 ...
2
votes
0answers
337 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
0answers
117 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 ...
2
votes
0answers
125 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 ...
2
votes
0answers
645 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 ...
2
votes
0answers
43 views
Is this a bug in Etherscan
This transaction shows that account 0x152ae79400fdeee287849f35e4f687316e27bae6 sent this smart contract 0x14fbca95be7e99c15cc2996c6c9d841e54b79425 a transaction that interally invoked the maker token ...
2
votes
0answers
300 views
token (deployed by other crowdsale) not showing up on Etherscan
I have a crowdsale that creates a token. The crowdsale shows up on Etherscan and can also be used on MyEtherWallet. I read the token address which gets created by the crowdsale constructor via MEW but ...
2
votes
1answer
224 views
Contract creating other contract doesn't show resulting transaction details on etherescan
Looking for help with a successful transaction not showing the details on etherescan.
Having a deployed factory contract like so (simplified):
contract EntityFactory {
event EntityCreated(...
2
votes
0answers
534 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 ...
2
votes
0answers
71 views
Why are my contracts created from a Factory appearing in etherscan as normal accounts and not contract accounts?
I have a factory on rinkby testnet that creates other contracts.
These other contracts are shown as normal human accounts, and not contract accounts.
It appears that the code for the factory and ...
2
votes
0answers
225 views
Strange revert() behavior on Etherscan
I am testing my contract, which is for an auction. I've deployed it on the Rinkeby testnet. I have a payable function that calls revert() if the bid being placed isn't higher than the existing bid.
...
2
votes
0answers
540 views
How to verify a deployed contract on etherscan
I would love to get some help with this as I'm wracking my brain with how to get this done.
I have gone through this link to verify my contract:
https://etherscan.io/verifyContract
I am puzzled with ...
2
votes
0answers
286 views
How to find constructor values being passed to a contract
I'd like to find out which values were passed in when someone deployed a CrowdSale token. Is there a way to find out.
Here is Lunyr Crowdsale contract
How would I find out which values they passed ...
2
votes
1answer
105 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, ...
1
vote
1answer
545 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 : ...
1
vote
0answers
28 views
Is there any alternative to string[]?
I need to store a number 4D security hashes. For example:
CCHdU3mFEYPpa-CYeDSooeZtYSG-CD9czobepa4a9-CRmVpX3Tegakr
I am storing number of these hashes in array of string i.e. string[] using
pragma ...
1
vote
1answer
29 views
Events declared in library are missed in contract ABI
DYDX contract SoloMargin is firing events like LogTrade, LogSell but they are not provided in ABI.
SoloMargin contract: https://etherscan.io/address/0x1e0447b19bb6ecfdae1e4ae1694b0c3659614e4e#code
...
1
vote
1answer
290 views
Sweeping ETH from a 2 year old paper wallet, help?
I have a paper wallet from an ETH atm from 2 years ago. I am trying to sweep the funds onto a digital wallet. I have used multiple ETH wallet apps on my phone but none of them were able to recognize ...
1
vote
0answers
13 views
How to judge whether a reentrancy attack is successful when reproducing the attack in private chain with Remix?
I reproduce the attack using the same codes successfully in Javascript VM of Remix, there are events in logs. But when I reproduce it in private chain, there are nothing. I cannot judge whether the ...
1
vote
1answer
392 views
What to do if Metamask doesn't show a deposit because it's an “internal transaction”?
This is a follow-up on the question "Do all transactions show in Metamask wallet?" from Sky Hayward, in which Sky asked about transactions that show up as successful on etherscan, yet the ...
1
vote
0answers
17 views
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/...
1
vote
1answer
229 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: ...
1
vote
0answers
12 views
Setting up listener using web3py
I'm setting up a proof of work contract. When a solution is found, the contract emits a Transfer event and the number that gets hashed with future solutions changes. I need to set up a listener so ...
1
vote
1answer
89 views
What do the Type Trace Addresses on the Internal Transactions Section of Etherscan mean?
I am seeking to better understand the bZx exploit by following the Internal Transaction section of the exploit transaction on Etherscan click here to view.
I am confused about what the Type Trace ...
1
vote
0answers
25 views
Is there a tool that generates a PDF version of a transaction?
Etherscan provides a nice UI for viewing what happened in an Ethereum transaction, including internal contract state updates.
Is there a tool or an API that takes an Etherscan link, or an Ethereum ...
1
vote
1answer
39 views
Watching for events
How come sometimes events show up on block explorers in hex and sometimes to you can see the actual string name of the event in the logs. I ask because my event watchers on my front end only pick up ...
1
vote
1answer
59 views
Different address make same signature for one message
Is it possible two different wallets (address) make the same signature for one message?
I have one message: '...
1
vote
1answer
54 views
Why am I getting “Invalid number of arguments to Solidity function” on Etherscan?
I'm trying to call a function via the Etherscan UI. I made sure the input data is correct, but I keep getting this error:
Invalid number of arguments to Solidity function
What's wrong?
1
vote
1answer
111 views
How to properly write inputs under the multiple transfer (multiTransfer) on the online etherscan form?
Problem:
I would like to make a multiple transfer of a token using the web-page:
https://etherscan.io/dapp/0x1C95b093d6C236d3EF7c796fE33f9CC6b8606714#
To reproduce the issue, click on the "Write ...
