http://foojayio.github.io/website/today/author/oleksandr-dendeberia/Articles written by Oleksandr Dendeberia on foojay.io - Friends Of OpenJDKHugoen-usSat, 22 Aug 2026 08:43:04 +0000http://foojayio.github.io/website/today/offline-crypto-address-validation-in-java/Sat, 22 Aug 2026 08:43:04 +0000http://foojayio.github.io/website/today/offline-crypto-address-validation-in-java/<p>Backend validation often starts with simple questions.</p> <p>Is the input empty? Does it have the expected shape? Can it be parsed? Does it belong to the selected domain?</p> <p>Crypto wallet addresses are no different, except the formats vary across chains and simple regular expressions are rarely enough.</p> <p>If a Java backend accepts crypto withdrawal addresses, address-book entries, CSV imports, support-tool input, or transaction preflight requests, it should reject clearly invalid addresses before calling RPC nodes, explorers, exchange APIs, or internal money-movement systems.</p>