v19.5.0

Stability improvements

• Vote for accepted values from round leaders, Nomination: do not vote for new values after confirming a candidate and nomination: reuse the value from votes improve the performance of the SCP nomination protocol.
• Cleanup floodmap. Improve overlay performance.
• clarify timeline for kicking out nodes off the network
• Add methods for identifying DEX-related operations and transactions.
• adjust demand period in flood test to avoid dropping txs
• Fix additional linker inputs in VS project.
• update build instructions for macOS

New features

• Extend load generator to produce high volume traffic

Jump Cannon (only enabled in vNext, not enabled in default build)

• Fix rust dependencies on Windows
• Bump env and add complex-wasm testcase.
• Build rust code with heavier optimization settings.
• Add some soroban metrics.
• Propagate cxx::Exception strings from preflight callbacks
• Fix nested-ltx bug introduced in #3557
• Include ledger sequence in preflight response
• Return contract result value
• Plumb events through to TxMeta / LedgerCloseMeta
• Bug 3548 set ledgerinfo on host
• Catch contract host panics, fix #3535
• Pass the source account into the host and allow calling into the token wrapper host functions

Breaking changes

• Turn on pull mode by default. Not technically a breaking change. A future release will deprecate non pull mode entirely.