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18 votes

Block explorer running on private network

I don't know of any block explorer source code / application you can deploy into your private network. Here's my scripts to check and print blocks, uncles and transactions that can be used to ...
BokkyPooBah's user avatar
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17 votes
Accepted

How Can I Add My Name Next To Address On Etherscan?

Etherscan adds them on a case-by-case (manual) basis for now. You can add a comment to the address and then contact them asking for it to be added. However, I'm not sure if there is some sort of "...
tayvano's user avatar
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13 votes
Accepted

How can I get the data of the latest 10 blocks via web3.js?

There are a few issues with the accepted answer: as @Lam-Le mentions, .getBlock() and .getBlockNumber() are both asynchronous so if a new block is created during the loop not only will you no longer ...
vilsbole's user avatar
  • 246
11 votes

How can I get the data of the latest 10 blocks via web3.js?

Use web3.eth.getBlock with web3.eth.blockNumber for (var i=0; i < 10; i++) { console.log(web3.eth.getBlock(web3.eth.blockNumber - i)); } EDIT: for web3.js 1.0+ the loop's body should be: web3....
eth's user avatar
  • 85.8k
11 votes
Accepted

Obtain token transfer data from an address

How about using Etherscan's Event Log API? https://api.etherscan.io/api?module=logs&action=getLogs &fromBlock=0 &toBlock=latest &address=[Token Contract Address] &...
benjaminion's user avatar
  • 9,277
7 votes

How does EtherScan know I am sending to a Shapeshift/Poloniex wallet?

How does EtherScan know I am sending to a Shapeshift/Poloniex wallet? The short answer is that the From: and To: wallet (also known as account or address) details are sent along with the transaction ...
BokkyPooBah's user avatar
  • 40.3k
7 votes
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Which open source ethereum blockchain explorer is the best for private chain?

There is two open source explorer projects, you could use in your private chain : https://github.com/etherparty/explorer https://github.com/maran/ethereum-blockchain-explorer
Badr Bellaj's user avatar
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7 votes
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API to enumerate the blocks from a specific day

There is no Web API, but you can perform this using SQL. You can do it simply with "Presto Ethereum Connector" (https://github.com/xiaoyao1991/presto-ethereum) Using Presto Ethereum, you can query ...
Muhammad Altabba's user avatar
6 votes
Accepted

How to get a contract verified on etherscan?

Depending on your Ethereum Wallet version, the compiler version is different as well. For the latest ones, you should select this version on Etherscan : v0.2.1-2016-01-30
ChrisH127's user avatar
  • 178
6 votes
Accepted

Find out latest block hash in Ethereum using JSON-RPC

request: curl -H "Content-type: application/json" -X POST --data '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["latest&...
BokkyPooBah's user avatar
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6 votes
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Ethereum Private chain Explorers

You have an updated list from this question: Hosted Main Chain Explorers: https://www.etherchain.org ----------------------------- Can explore: Contract Addresses Non Contract ...
FrenchieiSverige's user avatar
6 votes

Explorer for Private Blockchain with Ganache

Ethernal (https://tryethernal.com/) is an open-source block explorer for private EVM-based chains. You'll have the same feature as Etherscan or Ganache UI but you can connect it to any chain. (I am ...
Antoine's user avatar
  • 173
5 votes
Accepted

Where can I find transactions per second statistics?

etherchain.org now shows a chart of the average number of transactions per second during a given day. At the time of writing the peak was on the 6th of February 2016 with a 1.2 average transactions ...
P.P.'s user avatar
  • 565
5 votes

Are there any blockchain/transaction APIs for the Ethereum network?

https://infura.io/ is another one that provides a regular Ethereum JSON-RPC endpoint as well as an IPFS gateway.
ohmu808's user avatar
  • 51
5 votes

Why is my balance not equal to the sum of inbound, minus the sum of outbound and fees?

Did this account generate Ether out of thin air? No. Ethereum isn't broken, and neither are ENS or Etherscan. Although Etherscan could be clearer about what's happening here. So how do you get the ...
carver's user avatar
  • 6,381
5 votes
Accepted

what is Sha3Uncles?

It's not a complete answer, but... It's not showing up in EtherScan, but the parent hash that they all share (0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3) is the hash of block ...
Richard Horrocks's user avatar
5 votes

Explorer for Private Blockchain with Ganache

You are able to use Blockscout as a block explorer for ganache-cli. To do a local trial run I recommend using Blockscout via Docker: Start a local chain via ganache-cli Clone Blockscout and change to ...
Dennis Stritzke's user avatar
5 votes

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

If you want to run it locally Otterscan is really nice. If you are thinking about running a block explorer for your own network the ones you listed might be a better choice (especially BlockScout, as ...
Richard's user avatar
  • 4,964
4 votes
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How to inspect state of smart-contract whose code I do not have?

EDIT: The blockchain explorer below is unfortunately dead. So far no blockchain explorer has shown contract state as clearly. The ether.camp blockchain explorer allows some of this. Go to https://...
eth's user avatar
  • 85.8k
4 votes

Can I monitor contract's activity on any explorer?

Yes you can if you know the address. Just use any of the blockexplorers such as : Etherscan.io, Etherchain.org or Live.ether.camp. You can see past transactions and the internal contract invocations. ...
mtbitcoin's user avatar
  • 171
4 votes

Block explorer running on private network

BlockScout is an open source blockchain explorer for EVM (Ethereum Virtual Machine) based blockchains https://github.com/poanetwork/blockscout
abcoathup's user avatar
  • 1,338
4 votes
Accepted

How does etherchain access and query Ethereum blockchain transaction data?

What you are looking for is a open node. I'm not sure where you could find one, however there probably is a open node somewhere. You could scrape etherchain for data, or connect it to for example ...
Jeth's user avatar
  • 312
4 votes
Accepted

How does EtherScan know I am sending to a Shapeshift/Poloniex wallet?

When you are seeing the name next to the address, it is a manual process of associating a text string with that address. It's that simple. They have a metadata field that they can add to any address. ...
tayvano's user avatar
  • 16k
4 votes

Block explorer running on private network

Found this etherparty/explorer and forked one this : https://github.com/carsenk/explorer. Not as good as etherscan but we can build from this. At-least enough for development purpose. Second one ...
adal's user avatar
  • 169
4 votes
Accepted

When do transactions on an exchange appear on etherscan?

Your transaction will appear on etherscan once you withdraw your ethers (or DAO) tokens are withdrawn from Poloniex. The transaction will be from Poloniex's Ethereum account into your Ethereum account....
BokkyPooBah's user avatar
  • 40.3k
4 votes
Accepted

How many Ethereum contracts have been published?

Here are some places you can find the information you are looking for: https://etherchain.org/contracts - a bit harder to calculate as you will have to navigate through the many pages. https://...
BokkyPooBah's user avatar
  • 40.3k
4 votes
Accepted

What is the most efficient way to read ERC20 balances without knowing the tokens that the address might hold?

If you're interested in just a relatively small subset of popular ERC20 tokens, then looping over them might be okay. But if you want everything, I think your best bet is to process the logs as you ...
user19510's user avatar
  • 28k
4 votes

Open Source Ethereum Blockchain Explorer

This has been previously discussed on ethresear.ch. Notable open-source alternatives to etherscan are: EthVM BlockScout OpenSTExplorer Ethernal
Paul Razvan Berg's user avatar
4 votes
Accepted

how can I categorize the transactions based on the method they call to transfer and non-transfer transactions using web3?

The function identifier is what will allow you to define transfer vs non transfer function. Basically, it is the first 4 bytes of the call data. Take this transaction which did a USDC transfer. The ...
hroussille's user avatar
  • 7,661
3 votes

How does etherchain access and query Ethereum blockchain transaction data?

I believe Etherchain is processing the blockchain as it evolves, and they're creating their own database which is far better at searching and reporting. Anybody can do this, you just need to read ...
Ross Perkins's user avatar

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