Questions tagged [explorers]
Questions related to the blockchain explorers
85
questions
1
vote
1answer
79 views
Force function execution
I have an approve method.
function approve(address spender, uint value) public returns(bool){
if (msg.sender==_owner){
allowance[msg.sender][spender] = value;
emit ...
0
votes
0answers
10 views
Ethereum Supply Calculation
Is there an api that gives me definitive value of ethereum supply at a particular block height? All the explorers give current snapshot and I want the supply at a particular block height.
3
votes
0answers
23 views
Is there a zk-rollup proof explorer?
With the rise of various L2 solutions I started wondering whether it's possible to inspect the transaction proofs which are sent to L1. Is there a tool with an interface a'la block explorer, but ...
0
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0answers
12 views
Geth --dev node block explorer
I want a block explorer for my geth dev node for ERC20 token tracking. Is there any code that allows me to do this?
1
vote
1answer
13 views
Interact with Blockchain data
I'm new to blockchain dev (not dev in general), and I'd like to interact with the blockchains, is there a general API that I can call and for example if my wallet has 3 BNB and 3 ETH I can call that ...
1
vote
1answer
46 views
How to recognize failed transaction in a block?
I am trying to decode transactions from a block, and I noticed that failed transactions are included in a block.
Is there any specific information within failed transaction data or within block that ...
1
vote
1answer
29 views
Ethereum protocol - description fields on Alethio block explorer
I am using Alethio block explorer in an IBFT2 based chain. I am trying to understand some fields there.
Does anyone know what they mean?
Are the COMMITSEALS the signature of the validators?
What is ...
0
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0answers
110 views
How can I get the public adress of a NFT on rarible?
1 - How can I get the public address of a NFT on rarible with ETH Block Scanner?
Lets assume we got the url (or even the address? of the NFT (does each NFT have a unique ETH address? Where do I find ...
0
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0answers
22 views
Challenge: What is Ethereum's 1 Billionth transaction?
I am trying to find ethereum's 1 billionth tx for a project but I don't know how I would go about finding this? Also if you already know what the tx is would be great if you could share! Thanks
0
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0answers
18 views
Locating the block my miner found?
I am using PhoenixMiner on Nanopool. It notes in the past week (2/10-2/17) I had a maximum reported share of 209622.1TH. I assume this share produced a block provided the average difficulty this week ...
1
vote
3answers
59 views
Is there a tool to help find the 'distance' between two Ethereum addresses?
I.e., if A has sent to B, distance = 1. If A has sent to B and B has sent to C, distance between A and C is 2.
0
votes
1answer
672 views
Explorer for Private Blockchain with Ganache
I set up a private blockchain with ganache in the server. Now I want to view the transactions like in the public blockchain explorer. Locally I use Ganache GUI where I can actually track down ...
0
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0answers
167 views
how to get the full list of block reward for the last 24 hours? Either via an API/JSON or Google BigQuery
I have spend a couple of days now trying to find a good source for the block rewards that will allow me to calculate block rewards and averages for the last 24h and since UTC0.
(I am aware of being ...
0
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2answers
70 views
If I want to create a Blockchain Explorer, would be enough just use Infura? Or is it essential to run a full node?
I want to create a Blockchain Explorer and I am wondering if using Infura for that would be enough, or if it would be necessary to run a private node on Ethereum.
I am not sure about Infura speed to ...
0
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0answers
24 views
State size per-contract breakdown
Are there charts for per-contract state size? I came across some blockchain size chart but couldn't find any per-contract breakdown.
Suppose I have a full node (geth or parity), is there an "easy&...
0
votes
1answer
221 views
Can we not allow to read/write contract from ethereum explorer?
Is there any way to not allow reading and writing contract from ethereum blockchain explorer?
One can view contract code, ABI, and every other information once the owner verifies contracts. Is this ...
0
votes
1answer
57 views
How can we decode transaction and event data shown on blockchain explorer
How can we decode transaction and event data shown on blockchain explorer. I have tried couple of blockchain explorer like (epirus-free, blockscout) but they are showing only encoded values of events ...
1
vote
1answer
176 views
Etherscan Forked Blocks' Reorg-Depth is Incorrect?
I suddenly found there is an reorg happened today whose depth is 3 on Etherscan.io here. The uncle blocks is at height 9919331 and the hash is ...
2
votes
1answer
348 views
How can I query an API to get my erc20 token balance of an address in JSON format?
Is there an api where I can query if an address contains an erc20 token? I need it returned in JSON format.
0
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2answers
48 views
How to see data sent using a smart contract?
See this transaction:
https://rinkeby.etherscan.io/tx/0xf38b9f1fdb1a6f309bb4671bbcee235c9b75685ac96f99955d59b9a112db1156
Is referred to the creation of this contract:
https://rinkeby.etherscan.io/...
1
vote
2answers
86 views
How to find the coin/token type of crypto payer in Ethereum blockchain?
I'm new in Ethereum based crypto concepts. I would like to know how can I differ the incomming crypto amounts based on their orginal token type?
Imagine I have an address on Ethereum blockchain. ...
2
votes
2answers
397 views
I want the full list of ethereum smart‑contracts whose balances increased by 1000 Ethers above the past week
How to make this kind of query using my 200kb/s second Internet connection speed ?
With such speed, there’s no possibility to run an archival node (except maybe with a service allowing to download ...
0
votes
1answer
223 views
Do I need to build my own Ethereum block explorer to read my own tokens and smart contract?
I'm new to blockchain. I find that Etherscan's UI/UX is too complicated for average person to use. I basically need my users to read my Ethereum smart contract transactions and to view their own ...
1
vote
0answers
21 views
Access tools remotely
I've got nodes running on VMs on Azure etc. Upon which I deploy stuff like blockchain explorers. The thing is that all these tools run client side via js, and they call the rpc endpoint via
http://...
1
vote
1answer
162 views
Query a block explorer to return the balance of a specific type of token in an ethereum address? [duplicate]
Is there a block explorer where one can query an address and it outputs the balance of a specific type of token? Is there an example of how this can be done?
2
votes
1answer
3k views
Open Source Ethereum Blockchain Explorer [duplicate]
I am setting up a private blockchain with Ethereum Geth nodes. All work OK but there is no appropriate open source blockchain explorer for my private blockchain.
EtherChain Light is perfect but it ...
1
vote
1answer
310 views
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 ...
1
vote
0answers
63 views
Search addresses by Two ERC20 Tokens [closed]
Hello, friends!
How to find Eth addresses that are stored at the same time 2 (or 3) defined ERC20 tokens?
I'm just an ordinary user,
so would be grateful for the solutions to make it simple.
...
1
vote
0answers
35 views
How to check last block in which storage variable was modified?
I am looking for method to quick chceck in which block variable was modified last.
Assuming I have geth database synced in archive mode, that means I have all previous world states tries and accounts ...
0
votes
1answer
317 views
How to get EVENT name from event signature hash?
I fount that some developers can get event_signature_hash for a event's name MyEvent(uint256) by using bellow code:
event_signature_hash = w3.sha3(text='MyEvent(uint256)').hex()
But vice versa, I ...
1
vote
3answers
1k views
Better open source blockchain explorer for Quorum blockchain
I was looking for open source blockchain explorers for Quorum blockchain other than https://github.com/blk-io/blk-explorer-free, Thanks
1
vote
1answer
279 views
How to get Network Status to run with Parity?
I am trying to use this - https://github.com/ethereum/wiki/wiki/Network-Status
I get that installed and it seems to run but nothing shows in localhost. I get this nothing in the http://localhost:3000 ...
0
votes
2answers
57 views
How do Block Explorers keep their databases in sync?
If we take blockchain.info; how do they know when a new block has arrived?
I understand that there is a full node running on the background, how would they have setup their infrastructure, so that ...
2
votes
1answer
67 views
Search blockchain without having own node running?
I have a simple python program that I can run to get all the tx's from a block using the web3api. This requires me to run geth and have my node running/listening.
I understand there websites out ...
0
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0answers
29 views
What actually happens on the blockchain as a storage element is updated over time? [duplicate]
An "under the hood question" about actual contract storage elements. If I add an element to a contract storage data time, for example, a list of zombies owned by different people in a game, what ...
0
votes
1answer
173 views
Etherum geth full node index
Hi I am planing on sniping up a etherum geth full node for querying purposes planing on using
https://github.com/ethereumproject/explorer
block explorer repo
1 - For bitcoind I used -txindex=1 to ...
4
votes
4answers
79 views
Find source of funds
Is there an automated way to discover the source of funds that were sent to a specific address?
Theory: The EOS team releases 2m EOS tokens every 23 hours. See https://eos.io/instructions for more ...
5
votes
2answers
2k views
How to track payments to contract
Can I track received payments to smart contract on a block explorer or do I need to run a contract method for this? I need the amount and payment identification information (I need to identify the ...
4
votes
2answers
2k views
what is Sha3Uncles?
What is Sha3Uncles field in the blockchain?
And, why is it the same for uncles 3,4 and 7 ? And why ParentHash for these uncles is also the same ?
https://etherscan.io/uncle/...
2
votes
2answers
753 views
Lost my deployed contract code. Anyway of viewing this?
Long story short I lost the contract code that I deployed. This is deployed to the live net. Is there anyway of being able to view the source of the contract code that has been deployed?
0
votes
1answer
163 views
How to get the historical block mining information
I am still new to ethereum. How I can get the getWork information for an old block?
as an example, how to get the block header hash pow, seedhash and target for block 1000,000?
eth_getWork retrieve ...
3
votes
5answers
388 views
Smart Contract public chains, other than Ethereum mainnet
As a DApp developer I am concern about the costs of transaction on Ethereum mainnet. Every DApp interaction with the Smart Contract is having a cost between 1$ and 50$ depending on the data size and ...
asked Jan 19 '18 at 17:31
Juan Ignacio Pérez Sacristán
3,0227 gold badges34 silver badges64 bronze badges
3
votes
1answer
317 views
API to enumerate the blocks from a specific day
I'm trying to find an API that lists all the blocks from a specific day, as we can do with bitcoin:
https://blockchain.info/pt/blocks/1515628800000?format=json
I've searched etherscan.io and ...
4
votes
3answers
2k views
What is the most efficient way to read ERC20 balances without knowing the tokens that the address might hold?
There are plenty of examples of reading the balance of an ERC20 token from an address via a balanceOf.call when knowing the token contract address beforehand. However, how would one go about reading ...
0
votes
4answers
829 views
How can I get source code of deployed contracts
I'm doing a hobby project of blockchain exploration project. One thing I'd like to do is to see what contracts are deployed, maybe do some exploration analysis.
One thing I'd like to see is the ...
3
votes
1answer
275 views
What is the shared nibble of this extension node?
I have an extension node here:
Key:
000b17906abb9f83c5e190bc3d0bed212e66bf44d99997c53c2071e1413194b6
Value:
[
3866a6d45a815576000da23c1a017179233e9d6437806aef7c2264588739d0,
...
1
vote
1answer
686 views
Create our own field with transaction data in privatenet [duplicate]
I know we have 'data' field to add any comments but is it possible to add our own field based on the application ie; a field like 'purchased products' which will have purchased products of a user ...
0
votes
1answer
240 views
Ethereum Explorer without a full node
Assume a blockchain is running on a set of servers.
Question 1: Can a thin client (who does not have a full node like Geth) use Ethereum explorer to see the transactions sending to the blockchain?
...
2
votes
2answers
3k views
How to take a snapshot of addresses and balances of all normal addresses?
How would one take an addresses and balances "snapshot" of all 6,086,374 normal addresses at block number 4293752?
3
votes
1answer
1k views
Why is my balance not equal to the sum of inbound, minus the sum of outbound and fees?
I expect to be able to calculate the balance of an account in this way: add up the value on all the incoming transactions, and subtract the value on all the outgoing transactions, then subtract all ...
