Why did the ERC20Snapshots extension disappear from the wizard ? Where can I find the example of its usage now?

ERC20Snapshot removed in version 5.0.0 : Removals Summary The following contracts, libraries, and functions were removed: Address.isContract (because of its ambiguous nature and potential for misuse) Checkpoints.History Counters ERC20Snapshot ERC20VotesComp ERC165Storage (in favor of inheritance b…

It was indeed removed for 5.0, and similarly from the Wizard. We now recommend using ERC20Votes instead.

Got it. However, we need the Snapshots extension for different purposes than governance, so Votes are unsuitable. In theory, considering the previous implementation of the ERC20Snapshots extension, I can write the updated one supporting new features such as the _update function instead of token ho…

[image] Introducing OpenZeppelin Contracts 5.0 OpenZeppelin Contracts 5.0 is the first major release of the Solidity library since 2021, allowing the team to modernize the library and improve efficiency while keeping state-of-the-art security practices.

Note that you've marked this as a solution to your question, so it is likely that no one will try to answer it.

Hi @jusikX and @barakman , I, too, am looking for a way to know about historical balances at certain points in time. While I was not exactly overwhelmed with the snapshot feature , I am much less happy with the Votes feature , because the gas overhead seems much bigger even. Will look into offchain s…

I'm not in charge of OZ path, but regarding your note about events - I usually fetch them from an Ethereum Node, i.e., using an offchain script. Unlike fetching the value of a state-variable in an older block, which requires an Archive Node, which you will likely need to subscribe and pay for, fetc…

Hi @barakman , thanks for the reply and sorry I was so unclear in my wording. I wanted @jusikX to share which path he is going to take with his problem. Fetching events is interesting, too, thanks for that hint!

I rewrote the ERC20Snapshot extension, taking into consideration the v5 release: Introduced custom errors _update function instead of the _beforeTokenTransfer hook rejected the use of the Counters library in favor of simple uint256 variable Regarding Counters: the counter turned out to be a simpl…

Still, I think the current version of the Snapshot extension is far from perfect, probably that's why it was removed.

ERC20 Snapshot extension disappeared from wizard

Support Contracts

ernestognw October 27, 2023, 9:29pm 15

I recommend checking this reply for more context about how we recommend replicating the ERC20Snapshot functionalities.

Topic		Replies	Views
ERC20Snapshot Alternative in new OZ Library Contracts	22	2343	January 29, 2025
Draft review: ERC20Snapshot General erc20	7	3094	April 29, 2019
ERC20 Snapshot not usable for smart contracts Contracts erc20	7	3343	March 29, 2021
ERC20Snapshot and flash loans/swaps/mints Security	12	4232	June 25, 2020
Understanding Openzeppelin Governance contract Contracts	2	1278	October 1, 2021

ERC20 Snapshot extension disappeared from wizard

Related topics