Ethereum

Questions tagged [explorers]

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Questions related to the blockchain explorers

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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&...
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1answer
34 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 ...
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1answer
29 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 ...
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1answer
67 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 ...
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1answer
80 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.
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2answers
44 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/...
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2answers
48 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
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2answers
163 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 ...
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1answer
129 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 ...
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0answers
18 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://...
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1answer
91 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?
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1answer
2k 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 ...
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1answer
231 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 ...
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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. ...
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0answers
34 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 ...
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1answer
227 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 ...
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2answers
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
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1answer
256 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 ...
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2answers
50 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
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1answer
66 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 ...
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0answers
28 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 ...
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1answer
124 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 ...
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4answers
67 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 ...
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2answers
1k 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
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2answers
1k 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/...
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2answers
549 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?
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1answer
136 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 ...
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5answers
380 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 ...
3
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1answer
233 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
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3answers
1k 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 ...
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4answers
470 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
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1answer
228 views

What is the shared nibble of this extension node?

I have an extension node here: Key: 000b17906abb9f83c5e190bc3d0bed212e66bf44d99997c53c2071e1413194b6 Value: [ 3866a6d45a815576000da23c1a017179233e9d6437806aef7c2264588739d0, ...
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1answer
617 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 ...
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1answer
227 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? ...
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2answers
1k 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
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1answer
885 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 ...
5
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1answer
7k views

Obtain token transfer data from an address

I would like to obtain token transfer data from an address via Rest API For example, take this address: https://etherscan.io/address/0xfbb1b73c4f0bda4f67dca266ce6ef42f520fbb98#tokentxns (Etherscan ...
5
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1answer
594 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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4answers
1k views

Is there a list of Ethereum Classic block explorers?

Most Ethereum block explorers are only for Ethereum, but not Classic. Is there a list of Ethereum Classic explorers?
3
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1answer
150 views

What is the accepted methodology for verifying the integrity of pulled chain data?

What is the accepted methodology of checking the integrity of a chain? If I poll my Geth/Parity node for block data using web3.js how can I confirm that the data returned is not going to be subject ...
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1answer
91 views

Methods of attaching data to an ethereum address?

I'm trying to setup a system where you can attach a name and website url to an ethereum address. Then have it get called back in an ethereum block explorer I'm building. What are some ways where a ...
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2answers
14k views

Ethereum Private chain Explorers [duplicate]

I have created a private blockchain by initializing a new Genesis block. Created few accounts and have now substantial amount of Ethers as well. I am able to deploy and execute my contracts on this ...
3
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2answers
1k views

etherparty/explorer issues: “Allow Access to Geth and Refresh the Page”

Does anyone here have experience with the etherparty/explorer blockchain explorer? I am having trouble connecting. I keep getting the error message "Allow Access to Geth and Refresh the Page" ...
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0answers
136 views

What ETH blockchain explorers do you use and what features are missing? [duplicate]

(It is not a duplicate. We want to get the feedback about missing features. Thank you) There are different ETH blockchain explorers: etherscan.io etherchain.org ether.fund ether.camp ... We (...
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0answers
114 views

Access to list of internal transactions via etherscan API [duplicate]

Is there any way to get a list of all of the internal transactions which affect an account, as presented on the etherscan "internal transactions" page on etherscan, using their API? Or any other ...
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0answers
2k views

understanding etherscan.io blockchain explorer (ropsten)

I am new to eth. I tried to explore the blockchain using etherscan. For the record, here is my eth address: (0x757e0617fae3050242ddd13e2117ef1c62fdaf4d). There are three things in etherscan's page ...
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3answers
5k views

How could “ethereum block explorer” connect into geth that is already running on the main server securely?

I am working on private Ethereum Network. I run Ethereum boot-node and Ethereum Block Explorer app ( https://github.com/etherparty/explorer (A lightweight ethereum block explorer.) ) on the main ...
4
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1answer
2k views

Why does etherscan.io API response with wrong balance?

Let's take the following company. The current ETH Balance is 268,691.327038426 Ether: But API response 268698327038426745609145: As you can see API response does't contain floating point so the ...
6
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1answer
5k views

Which open source ethereum blockchain explorer is the best for private chain? [closed]

I have got eth-net-stats deployed with my private ethereum chain, but apparently it's far from being a real blockchain explorer. Are there any good open source blockchain explorers for private ...
4
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1answer
97 views

Are there apps to see total ether processed through a contract?

Building a TipFaucet for tipping a dev. Using this contract, is it possible to look up how much has been payed through the contract? contract TipFaucet { modifier isDev { if (msg.sender != // ...

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