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Testnet-2 Changelog

This is a curated list of only changes affecting testnet-2.

note

We group changes into

  • protocol changes (generally requiring a new Revision)
    • generally tagged with [EVM], [Consensus], or [Network params]
  • RPC/SDK behavioral changes (generally tagged with [RPC])
  • performance changes
    • tagged based on the nature of the change as [EVM], [Consensus], or [RPC]
  • internal/node-ops changes (generally tagged as [Node ops])

v0.11.3 [2025-10-08]​

Revision: MONAD_FOUR (upgrade)

Tags or hashes for testnet-2:

Notable protocol changes - MONAD_FOUR​

Notable RPC/SDK changes​

Notable performance changes​

  • [EVM] Kernel caching of db reads and writes
    • Ref: monad PR #1559
    • Utilize available host memory to cache recent DB operations - this cache should increase performance of execution and RPC
  • [RPC] Improve RPC Db Node Cache and make it memory bounded
    • Ref: monad PR #1581
    • Note a rename of RPC cli flags: --eth-call-executor-node-lru-size to --eth-call-executor-node-lru-max-mem and a new flag --triedb-node-lru-max-mem with both default to 100MB.

Notable internal changes​

  • [Node ops] Remove bft-fullnode binary; only bft binary now
  • [Node ops] PeerDiscovery: Introduce precheck for peer self name address
  • [Consensus] Blocksync: only select blocksync peers from connected nodes
  • [Consensus] Raptorcast: DOS protection on decoding state cache
  • [Node ops] Secondary raptorcast config change
    • Ref: monad-bft PR #2378
    • Replace ambiguous secondary raptorcast mode parameter with enable_publisher and enable_client
  • [Node ops] Dynamically reload prioritized full-nodes
  • [Node ops] Fix wal2json
  • [Node ops/RPC] Support the RPC CLI param ws-sub-per-conn-limit
    • Ref: monad-bft PR #2161
    • Sets the maximum number of websocket subscriptions per connection (default to 100)
  • [Node ops/RPC] Add configuration options for high eth-call pool

v0.11.1 [2025-09-16]​

Note: v0.11.1 was a version that was deployed only on testnet-2 from roughly 2025-09-16 until 2025-10-08; however, it maps some features differently to revision MONAD_FOUR which are no longer memorialized in the codebase. testnet-2 was reset before deploying v0.11.3.

For all intents and purposes, this version can be ignored.

Tags or hashes:

v0.10.4 [2025-08-18]​

Revision: MONAD_THREE (unchanged)

Tags or hashes:

Notable RPC/SDK changes​

  • [RPC] EIP-4844 related fields in RPC responses are removed.
    • Block headers returned from RPC will no longer have blobGasUsed , excessBlobGas, and parentBeaconBlockRoot.

Notable performance changes​

  • [Consensus] Votes are now sent to current round leader. This is a consensus optimization that reduces the effective delay due to a round timeout
  • [Consensus] Caching of recently-verified quorum certificates
  • [Node ops] Enablement of trace calls is now controlled via monad (execution) command line arg --trace_calls.
    • To preserve legacy behavior, --trace_calls is currently enabled in the debian package. In the future we recommend disabling for validators and enabling it for RPC and archive nodes.
    • This allows voting validators to opt out of computing traces since they're only need for RPC nodes.

Notable internal changes​

  • [Consensus] TC forwarding to prioritized and public (non-dedicated) full nodes
    • Ref: monad-bft PR #2149
    • Prior to v0.10.4, all full nodes were subject to lagging behind validators in the event of a timeout because round advancement due to TC was not forwarded (and still isn’t to dedicated full nodes).
    • As a result, after timeouts, full nodes would frequently forward transactions to the next three leaders relative to a stale state. This results in those transactions often missing and the ensuing blocks being comparatively empty.
  • [Node ops] Bugfix for secondary raptorcast (round gap crash) that affected validators in Publisher mode
  • [Node ops] ledger-tail improvements
    • Reduced memory usage on startup
    • author_dns field changed to author_address to reflect change in v10 addresses
    • Timeouts and finalizations are tracked and logged
  • [Consensus] Txpool account preloading bugfix

v0.10.3 [2025-07-30]​

Revision: MONAD_THREE (upgrade; takes effect immediately - not time-gated)

Notable protocol changes - MONAD_THREE​

Notable RPC/SDK changes​

  • [RPC] Add support for real-time data via WebSocket and shared memory queue access (docs coming soon):
    • Geth real-time events (via WebSocket)
    • Geth real-time events with Monad extensions (via WebSocket)
    • Real-time data via shared memory queue, for programs on a full node host using the execution event SDK

Notable performance changes​

  • [Execution] Switch to JIT EVM. The bytecode of expensive or frequently-executed contracts is compiled directly to native code for faster execution
  • [Execution] Switch to using file pointer-based IPC to execute blocks. Previously, the client was using a write-ahead log (WAL), which did not take advantage of available consensus information and could result in avoidable execution

Notable internal changes​

  • [Node ops] Adds peer discovery
  • [Node ops] Adds full node RaptorCast, making the full node network scalable

testnet-2 genesis [2025-06-17]​

Running v0.9.3

Revision: MONAD_TWO