I am deploying NFT contracts on EVM compatible networks with an "etherscan" tx scanner.

I can see that sometimes the method of the tx listed is an alphanumeric string like 0xc203b6b8. But for known functions the readable name is displayed like as Mint, Safe Mint, Burn ...

By chance I have discovered that the DeleteRecord() function of my Solidity contract is shown as Delete Record but this doesn't work for functions like NewRecord(), SaveRecord(), EditRecord(), etc...

Then I wonder if there is a list where I can know which are all the functions that Etherscan shows as readable texts for use it and make my contract more clear in the scanner.

Thank you.

PD: This is an example of readable methods in my test contract: https://mumbai.polygonscan.com/address/0x025f05b1a985f173b0d50e1ec7378d5191d56f61

1 Answer 1


The alphanumeric string you are referring to is known as MethodID. It consists of the first 4 bytes of the hash of the method name and parameters.

There is a database where you can check signatures: https://www.4byte.directory.

Yet, it probably won't contain your signatures as your contracts aren't probably indexed by the database.

To find your MethodIDs use this documentation: https://solidity-by-example.org/function-selector/

Nevertheless, verifying your contract enables most scanners to show your methods by name.

  • I know the names of the MethodID of my contracts. What I want to know is what Solidity function names does Etherscan recognize and show after as a readable text like "Mint", "Transfer" or surprising to me "Delete Record"
    – JTCon
    Apr 27, 2022 at 9:55
  • @JTConsulta Have you verified your contract? Apr 27, 2022 at 9:56
  • I have not verified my contract. I am on a test network.
    – JTCon
    Apr 27, 2022 at 9:57
  • @JTConsulta Are you on a public or private test network? If its public like Rinkeby, you can indeed verify the contract. Apr 27, 2022 at 9:59

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