Contract Diff

Compare two deployed Stacks Clarity smart contracts and see exactly what changed between them. Fetches each contract's live ABI from Hiro and diffs the public/read-only functions (added, removed, or signature-changed — when arguments, outputs, or access level differ), plus maps, data-variables, and fungible / non-fungible token definitions. Newly-added admin or sensitive functions — mint authority, freeze/blacklist, transfer-pause, functions that can move other holders' balances, upgradeable/admin-transfer, drain/withdraw, fee/tax change, and mutable metadata — are highlighted separately. Set Include Source to "true" to also fetch both contracts' Clarity source and get a bounded line-level source diff (added/removed line counts plus a capped +/- preview) and publish heights. On-demand A-vs-B comparison only (not a version tracker — Clarity contracts are immutable and redeploys are not linked on-chain). Read-only. The name-based security highlights are heuristics, not a guarantee.