Questions tagged [explorers]

Questions related to the blockchain explorers

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View smart contract at previous block before self destruct?

Suppose I know the address that had a smart contract. This smart contract ran and called the self destruct function, so at the current block the smart contract has nothing there. But if smart contract ...
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Investigating an incomplete ETH address with 6 words or less

When investigating an incomplete ETH address on Etherscan we can write the first words and the search bar then autocomplete the rest and lists addresses starting with these words. But it does that ...
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How can I retrive status "message" of a (failed) transaction through web3.js?

Having a tx hash of a failed transaction, I need to have its status message through web3.js (as shown in red in the below image): Where does block explorer get the status message from?
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description fields on Alethio block explorer

I'm using Alethio block explorer on an IBFT2 based chain I would like to know the meaning of the validators field, will this field have all the addresses of the validators or just the addresses of the ...
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Why can't "input data" get decoded in a normal, readable format in an explorer, in some cases?

Let's say, this transaction https://testnet.snowtrace.io/tx/0x86895afcc3768254e5a1257790e95cdcd7402df6c88ed098c012a809a9be3e1d The function router.swapExactAVAXForTokens was called here. However, in ...
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How do I tell which solidity version eth-brownie is using to compile my contracts?

I'm not specifying a solidity version so I'm not sure which solidity version brownie is using to compile my contract. I'm using pragma solidity ^0.8.0; so I'm not sure which version above 0.8.0 ...
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Use blockchair API to filter results by addresses balance range [from, to]

I'm trying to use blockchair's API for ethereum results but filtered by addresses balance range. Can I do something like: https://api.blockchair.com/ethereum/stats?balanceRange=[0.58,0.83] And if I ...
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1 vote
1 answer
975 views

What is the best OPEN-Source ETH explorer? (alternative to etherscan) [duplicate]

What is the best OPEN-Source ETH explorer? I ve seen the following answer : Open Source Ethereum Blockchain Explorer Is these the only 3 open source alternatives to etherscan? EthVM BlockScout ...
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How to fork Etherscan block explorer?

I'm using a blockchain with quorum and I would like to use a block explorer like Etherscan. Is the Etherscan an open-source project? I've seen a lot of explorers that are similar, how can I get one ...
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How does MetaMask pull wallet data?

Title. Question out of curiosity. Does it connect to a block explorer API for each block?
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Is there any chain explorers like etherscan for local fork network?

I'm very new to blockchain, now I'm trying to learn and writing smartcontract on localchain (hardhat). I want to modify the values ​​in the contract. Is there anything like etherscan that doesn't have ...
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how can I categorize the transactions based on the method they call to transfer and non-transfer transactions using web3?

Blockchain explorers show "transfer" instead of the method id for some of the transactions on their list, so there should be a way to filter transactions based on the method they call. How ...
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Plugins to open deployed contract in IDE?

I can view contract code from the browser eg https://etherscan.io/address/0x8509d347caa93e7db87e0287ee51867bfcb7b9d2#code or on avax eg https://cchain.explorer.avax.network/address/...
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1 answer
2k 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 ...
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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.
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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 ...
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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?
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1 answer
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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 ...
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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 ...
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1 answer
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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 ...
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3 answers
131 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.
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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 ...
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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 ...
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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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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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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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1 answer
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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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2 answers
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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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2 answers
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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. ...
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2 votes
2 answers
638 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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1 answer
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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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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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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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2 votes
1 answer
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 ...
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1 vote
1 answer
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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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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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1 vote
0 answers
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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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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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1 vote
3 answers
2k 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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1 vote
1 answer
294 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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2 answers
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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 ...
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2 votes
1 answer
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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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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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2 answers
380 views

How to configure a geth full node for indexing token transactions?

I am planning on sniping up an ethereum geth full node for querying purposes planning on using https://github.com/ethereumproject/explorer block explorer repo. For bitcoin I used -txindex=1 to enable ...
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4 votes
4 answers
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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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5 votes
2 answers
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 ...
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4 votes
2 answers
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/...
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2 votes
2 answers
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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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1 answer
179 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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3 votes
5 answers
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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 ...
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