bsc – Is It Possible to Identify a Transaction That Deploys a New Token Using BSCScan API – Detailed Method

bscexplorer-api

I have access to the BSCScan API to take last transactions by calling for the last block:

https://api.bscscan.com/api?module=proxy&action=eth_blockNumber

Result:

{
"jsonrpc": "2.0",
"id": 83,
"result": "0x6d7138"
}

So I call the API again to see last block transactions (I presume they are the last transactions at all):

https://api.bscscan.com/api?module=proxy&action=eth_getBlockByNumber&tag=0x6d7138&boolean=true&apikey=<MY_API_KEY>

Result (partial):

{
"jsonrpc": "2.0",
"id": 1,
"result": {
"difficulty": "0x2",
"extraData": "0xd883010006846765746888676f312e31352e35856c696e7578000000fc3ca6b721df73705c7a4c0c4c69bb9d443a2d9431d6af69efd3e88f707830c919b9d48c7ef50acea5401d3c4691d4f0dc04d49190ffdad766715e9197fcce8d5725adaa00",
"gasLimit": "0x2a9d887",
"gasUsed": "0x13577e6",
"hash": "0x814280a50dd15e2d7c577443755d8c4d04e06404bd34758457b491734ff6f5d6",
"logsBloom": "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",
"miner": "0x70f657164e5b75689b64b7fd1fa275f334f28e18",
"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"nonce": "0x0000000000000000",
"number": "0x6d6faa",
"parentHash": "0x145593cb7c173573753ecbf4edba0bb94e8c439c9a341a6f3ac8cd5a23dcd591",
"receiptsRoot": "0x19cfdd8c4e818197bd6d3fbee1b934628bf902c7979b03f6bec4ca83b4a185c5",
"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"size": "0x12f01",
"stateRoot": "0x7ae1ef174f6c9333de03759f4384fdc36cf6cabc956727046c1279fc2576559d",
"timestamp": "0x60933ac2",
"totalDifficulty": "0xda5787",
"transactions": [
{
"blockHash": "0x814280a50dd15e2d7c577443755d8c4d04e06404bd34758457b491734ff6f5d6",
"blockNumber": "0x6d6faa",
"from": "0x000000a0c521dd28025b937b1f15141d61969959",
"gas": "0x493e0",
"gasPrice": "0x5d21dba00",
"hash": "0x5fdf16feb5d044603c821312e38b1db95a9f6bee35a012d08476d17a2a2ce538",
"input": "0x38ed17390000000000000000000000000000000000000000000000006c53ced68a312000000000000000000000000000000000000000000000000006abbea5d4c723400000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000a0c521dd28025b937b1f15141d619699590000000000000000000000000000000000000000000000000000000060933ac60000000000000000000000000000000000000000000000000000000000000002000000000000000000000000bb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c0000000000000000000000007083609fce4d1d8dc0c979aab8c869ea2c873402",
"nonce": "0x3abdc",
"to": "0xc0788a3ad43d79aa53b09c2eacc313a787d1d607",
"transactionIndex": "0x0",
"value": "0x0",
"v": "0x93",
"r": "0x6912203611a43fb110b8b1f8057c8cd92fb893db706342bf380670fa9370700e",
"s": "0x1a90b45b8c0d602253281d32e512a594ec05697a4cf1ef6e227d0b5db9edc97c"
},

So … is possible to check that TX and tell it is a token deploy? My goal is to know when a new token arrives on the chain.

I found this kind of address "Contract Creation" but don't know what is it.

EDIT

Well.. seems I can't figure out how to find the token contract address by looking the creation transaction.

Here I can see the TX 0xa675342c579fe2424be52b861bb9acd9acb6f98ff79eb99177000a2438b28487 was creted the contract 0x0ff5c3bffea73b562a9ec897e78b6a650fafd104 but there is no reference to this hash in block 7173853 as you can check here: https://api.bscscan.com/api?module=proxy&action=eth_getBlockByNumber&tag=0x6D76DD&boolean=true

Best Answer

After give a look here and check this log and this transaction I tempted to conclude I'm just need to check the data of transaction. I conclude all contract deployment data I found starts with "0x60806040527f76".

Actually.... this is the start of the contract code...most like "pragma solidity bla bla bla" so this must be the Solidity version.

I discovered the "TO" attribute is null for contract deployments ...

Related Solutions

Explorer API – API to Gather List of Top Token Holders in Ether

I don't know of any APIs that will achieve what you want.

If not does anyone know of a way to accomplish this?

Here's some fairly dumb Python code that scrapes that page and writes it to a .csv file:

#!/usr/bin/env python

import requests
from bs4 import BeautifulSoup
import csv

URL = "https://etherscan.io/accounts"
resp = requests.get(URL)
sess = requests.Session()
soup = BeautifulSoup(sess.get(URL).text, 'html.parser')

with open('output.csv', 'wb') as f:
    wr = csv.writer(f, quoting=csv.QUOTE_ALL)
    wr.writerow(map(str, "Rank Address Balance Percentage TxCount".split()))

    for tr in soup.find_all('tr'):
        tds = tr.find_all('td')
        rows = [0] * len(tds)
        for i in xrange(len(tds)):
            rows[i] = tds[i].get_text()

        try:
            wr.writerow(rows)
        except:
            # The page contains another table that we're
            # not worried about but which contains special 
            # characters...
            pass

Im curious how etherscan accomplished this.

Probably by parsing the state data and creating their own internal representation of it. This would then allow them to manipulate and present it in any way they like.

I would like to do this for other ERC20 tokens as well.

Here's a slightly more complicated script (that I wrote a while ago) that lists all addresses and balances - in rank order - associated with a given token contract, across multiple Etherscan pages. You can poke around with it to suit your needs. (There's an example contract address currently hard-coded into it.)

#!/usr/bin/env python

from __future__ import print_function
import os
import requests
from bs4 import BeautifulSoup
import csv
import time

RESULTS = "results.csv"
URL = "https://etherscan.io/token/generic-tokenholders2?a=0x6425c6be902d692ae2db752b3c268afadb099d3b&s=0&p="

def getData(sess, page):
    url = URL + page
    print("Retrieving page", page)
    return BeautifulSoup(sess.get(url).text, 'html.parser')

def getPage(sess, page):
    table = getData(sess, str(int(page))).find('table')
    try:
        data = [[X.text.strip() for X in row.find_all('td')] for row in table.find_all('tr')]
    except:
        data = None
    finally:
        return data

def main():
    resp = requests.get(URL)
    sess = requests.Session()

    with open(RESULTS, 'wb') as f:
        wr = csv.writer(f, quoting=csv.QUOTE_ALL)
        wr.writerow(map(str, "Rank Address Quantity Percentage".split()))
        page = 0
        while True:
            page += 1
            data = getPage(sess, page)

            if data == None:
                break
            else:
                for row in data:
                    wr.writerow(row)
                time.sleep(1)

if __name__ == "__main__":
    main()

[Ethereum] Checking whether a contract is verified on Etherscan or BSCscan through an API

Ok I found out the answer to this question. Essentailly the API I specified above was the correct one. You just have to check the 'data' field.

If verified:

data.status = '1', and it has some other fields

If not verified:

data.status = '0' and data.result = 'Contract source code not verified'

Best Answer

Related Solutions

Explorer API – API to Gather List of Top Token Holders in Ether

[Ethereum] Checking whether a contract is verified on Etherscan or BSCscan through an API

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