◎ Radar

# Release of Canton 3.5.1 Canton 3.5.1 has been released on May 27, 2026. ## What’s New ### Contract Keys #### Overview Canton 3.5 introduces contract keys. Compared to a similar feature available in Canton 2.x, there are two notable differences: - The keys are not unique, meaning multiple contracts may share the same key. - Negative lookups are not validated. As a consequence, application developers must ensure key uniqueness through external enforcement mechanisms. Contract keys are avai