Emurgo/cardano-serialization-lib 5.0.0-rc.0

on GitHub

Support for the Allegra hardfork

Note: transactions created in 4.3.0 will still work (no need to upgrade if you're just creating and broadcasting transactions)

However, this upgrade is needed if either:

1. You want to use Allegra specific functionality (token locking scripts for on-chain voting)
2. You want to parse Allegra transactions / blocks from raw bytes (not needed if you're using cardano-db-sync)