Verify Ethereum Address Format & Validity Validate Ethereum addresses — 0x + 40 hex chars.

The tool uses a regular expression to validate Ethereum addresses, specifically the pattern /^0x[0-9a-fA-F]{40}$/. This regex checks for the presence of "0x" followed by exactly 40 hexadecimal characters, which is the standard format for Ethereum addresses. Under the hood, it utilizes React's useState and useCallback hooks to manage state changes and optimize performance. When a user inputs an address, the tool trims any whitespace from the input using the trim method and then tests it against the regex pattern.

The validation process also involves checking the address against EIP-55 standards, which dictate that the uppercase characters in an Ethereum address are determined by the Keccak-256 hash of the lowercase version of the address. However, this specific implementation does not directly implement EIP-55 checksum verification, instead relying solely on the regex pattern for basic validation. The copy-to-clipboard functionality is achieved using the copyToClipboard function from the "@/lib/utils" module, which utilizes browser APIs to perform the copying action.

In terms of data structures, the tool uses JavaScript objects to store state information, such as the input address and validation results. The result object contains two properties: valid, a boolean indicating whether the address is valid, and info, a string providing additional information about the address. This information includes a truncated version of the address for display purposes. The use of React's cn function from the "@/lib/utils" module allows for dynamic class name generation based on the validation result and copy status.

The tool's interface is built using HTML elements, including input fields, buttons, and div containers, which are styled using CSS classes such as glass-card, glass-input, and glass-button. The React library handles rendering and updating the UI components in response to state changes. When a user clicks the validate button, the tool checks the address against the regex pattern and updates the result object accordingly, triggering a re-render of the UI with the validation outcome.