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When I created a simple coin as a proof concept, I just used ERC20 (Token Standard). Right after creating the contract and showing it to some colleagues, I found out that I should've implemented ERC223 instead, which is a more secure token standard.

What other ERCs should one be aware of when creating new Coins?

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ERC-223 is the successor to ERC-20, which solved a few pitfalls found in ERC-20.

There's also ERC-721 for non-fungible tokens (such as CryptoKitties).

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I have reviewed and studied these ones during my work on 721.

Standards

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