ERC-20
An Ethereum interface standard for fungible tokens, including balances, transfers and spending allowances.
In more detail
ERC-20 gives wallets and applications familiar ways to interact with many tokens. That shared interface is why a new token can appear in existing tools without each tool writing custom code first. It doesn't guarantee a token's value, authenticity or safe behavior, and unusual transfer rules can still surprise an app.
How you might use it
A wallet reads an ERC-20 balance and asks for a spending approval before a swap contract can transfer those tokens.
- Written out
- Ethereum Request for Comments 20
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