Release Notes - ICE iMpact Multicast Price Feed Handler C++ - Version 8.20.0

New Feature

• [CPPICEIMPACT-1469] - Support iMpact Multicast Feed Message Specification version 1.1.54.2 (July 27, 2026)
• [CPPICEIMPACT-1468] - Support iMpact Multicast Feed Message Specification version 1.1.54.1 (June 8, 2026)
• [CPPICEIMPACT-1465] - Support iMpact Multicast Feed Message Specification version 1.1.54 (March 26, 2026)
• [CPPICEIMPACT-1464] - Support iMpact Multicast Feed Message Specification version 1.1.53 (March 13, 2026)
• [CPPICEIMPACT-1449] - Support the ICE iMpact Sequence ID Rollover message
• [CPPICEIMPACT-1447] - Add a Handler option to report empty multicast message blocks
• [CPPICEIMPACT-1432] - Support iMpact Multicast Feed Message Specification version 1.1.51 (January 7, 2025)

Improvement

• [CPPICEIMPACT-1455] - Do not send Historical Replay requests for snapshot channels
• [CPPICEIMPACT-1303] - Enable `TrackTopOfTheBookOnly` option for FOD subscriptions

Bug

• [CPPICEIMPACT-1422] - Order book prices are incorrect when definitions arrive via live multicast feed
• [CPPICEIMPACT-1414] - BREAKING CHANGE: Sequence Number Overflow Handling