Check Bitcoin Address Format & Validity Validate Bitcoin addresses — Legacy, P2SH, Bech32.

The Bitcoin Address Validator works under the hood by utilizing React's useState and useCallback hooks to manage its state and handle user interactions. When a user inputs an address, it trims any whitespace from the input string using the trim method. The tool then uses three regular expressions - p2pkh, bech32, and p2sh - to match the input address against known patterns for Legacy (P2PKH), P2SH, and Bech32 SegWit formats. These regex patterns are defined as constants within the validate function: p2pkh checks for strings starting with 1 or 3 followed by 25-34 Base58 characters, bech32 checks for strings starting with bc1 followed by 25-90 alphanumeric characters, and p2sh checks for strings starting with 3 followed by 25-34 Base58 characters. If the input address matches any of these patterns, it sets the valid state to true and provides additional information about the address type.

The copy button uses the copyToClipboard function from the @/lib/utils module to asynchronously copy the validated address to the user's clipboard. This is achieved through the use of React's useCallback hook, which memoizes the copy function so that it's not recreated on every render. The tool also utilizes CSS classes and utility functions like cn from @/lib/utils to manage its styling and layout. When a user clicks the validate button, the tool checks if the input address matches any of the regex patterns and updates the result state accordingly. This is then reflected in the UI through the display of either a "VALID" or "INVALID" message along with additional information about the address type.

The use of Base58Check encoding for P2PKH and P2SH addresses, and Bech32 encoding for SegWit addresses allows the tool to perform validation entirely on the client-side without relying on external servers. The input address is checked against these encodings using the defined regex patterns. If a match is found, it indicates that the address conforms to the expected format for that particular type of bitcoin address. By leveraging React's hooks and utility functions like copyToClipboard, the tool provides an efficient and user-friendly way to validate bitcoin addresses in various formats.