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I am looking for a way to get all erc20 token transfers with specifying block number only.

For ETH there is already a way exists here.

I have done some search and found this method to find transfers of a specific address.

https://api.etherscan.io/api?module=account&action=tokentx&sort=desc&address=SOME_ADDRESS&startblock=BLOCK_NUMBER

Is there any way to list all token transfers of a specific block by just providing a block number as a parameter in any way ?

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You can use the Web3 APIs to pretty easily do this.

You just need to know that the ERC20 standard has a fixed ABI, and thus will have a fixed "method id"

Function: transfer(address _to, uint256 _value) 
MethodID: 0xa9059cbb

Any ERC20 transfer that happens in a block should start with 0xa9059cbb since this determines which function is called in a contract.

With this information, you just need to:

  • Get a block
  • Get all transaction hashes
  • Get all transactions
  • Check the first 10 characters match

Like so:

window.web3 = new Web3(new Web3.providers.HttpProvider("https://mainnet.infura.io/<APIKEY>"));

async function getERC20Transfers(blockNumber) {
  let block = await web3.eth.getBlock(blockNumber);
  for (var transactionIndex in block.transactions) {
    let transactionHash = block.transactions[transactionIndex];
    let transaction = await web3.eth.getTransaction(transactionHash);
    if (transaction.input.substr(0,10) == "0xa9059cbb") {
        console.log(transaction)
    }
  }
}

getERC20Transfers(7210415);

You can find a working example which prints to your browser console here: https://jsfiddle.net/4sujyx5g/2/

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