1

could the metadata inn ERC721 be altered after issuing a token ? I want to create an contract allowing people changing the Token metadata content (on the tokens purchased in ICO).

|improve this question
  • if you are asking about technical possibility , then yes, you are the one who is programming the contract, so you can output from a metadata call even a pseudo-random number. btw, metadata is optional, not a requirement. – Nulik Jun 28 '18 at 23:25
  • I am treating metadata as added value, just trying to determine whether I can overwrite it. Do you have an idea what is the metadata weight limitation in erc721 ? – frkfrk0 Jun 29 '18 at 9:06
  • Haven't seen any size limitations in the standard specification of 721. But I am not fully understanding what are you trying to achieve. Maybe its worth detailing this in the original question. Because 721 tokens are non-fungible, i.e. each token is unique and has different price. However the ICOs are offering fungible tokens (like EOS token for example) , these tokens have the same price for the entrie totalSupply. So I guess your idea of offering metadata on purchased tokens in an ICO is conceptually flawed. – Nulik Jun 29 '18 at 20:27
  • I am thinking if I am able to alter the metadata, after deploying the contract. – frkfrk0 Jul 6 '18 at 8:54
  • I am trying to make an example for you but Remix IDE is broken at the moment. Please ping me if this is fixed // github.com/ethereum/remix-ide/issues/1531#issue-361785565 – William Entriken Sep 19 '18 at 14:52
2

Metadata of a non-fungible ERC-721 token are hosted on a public HTTP address. The content of this metadata JSON file can be changed. ERC-721 standard does not prevent you to add smart contract logic for changing token's URI.

|improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.