Historical retrospective · Ethereum
EIP-55 added mixed-case checksums to Ethereum addresses
EIP-55 describes a checksum encoding that uses address capitalization to catch some errors when users copy or inspect hexadecimal addresses.
The format improves error detection without changing the underlying address or transaction rules.
It is an example of a small user-safety convention with ecosystem-wide effects.
Checksums catch some transcription mistakes but cannot prove a recipient is the intended person or service.
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