Release Notes

Trinity is moving fast. Read up on all the latest improvements.

Trinity 0.1.0-alpha.27 (2019-07-17)


  • Don’t require blspy by default, which was breaking doc builds and making standard installs more difficult (by requiring cmake) (#805)


Trinity 0.1.0-alpha.26 (2019-07-16)


  • Expose certain peer pool events and move RequestServer into an isolated plugin (#617)
  • Run UPnP Service as an isolated plugin (plus #730 fixup) (#636)
  • Log the gap time between the imported header and now; don’t blast screen with logs when regular syncing a lot (#646)
  • Make logging config more ergonomic, flexible and consistent (#682)
  • In-memory Transport for use in testing. (#693)
  • Expose events for Transaction and NewBlockHashes commands on the EventBus (#696)
  • Use trinity db-shell to connect to a running process and inspect its database (#728)
  • Pool management upgrades
    • Move TransactionPool into its own process
    • Create ProxyPeerPool that partially exposes peer pool functionality to any process (#734)
  • Move responsibility for receiving handshake into p2p.transport.Transport class. (#755)
  • Trinity can now autocomplete CLI parameters on <tab>. Learn how to activate autocomplete in the docs. (#768)
  • Implement p2p.trio_service.Service abstraction using trio as a loose replacement for the existing asyncio based p2p.service.BaseService. (#790)
  • trinity attach can now accept path to ipc as parameter Learn more docs. (#796)


  • Header syncing is now limited in how far ahead of block sync it will go (#704)
  • Prevent KeyError exception raised at del self._dependencies[prune_task_id] during syncing (#731)
  • Fix a race condition in Trinity’s event bus announcement ceremony (#763)
  • Several very uncommon issues during syncing, more likely during beam sync (#772)
  • Squashed bug that redownloads block bodies and logs this warning: ValidationError: Cannot finish prereq BlockImportPrereqs.StoreBlockBodies of task (#780)
  • When starting beam sync, download previous six block bodies, so that uncle validation can succeed. Import needs to verify that new block imports don’t add uncles that were already added. (#803)

Improved Documentation

  • Setup towncrier to generate release notes from fragment files to ensure a higher standard for release notes. (#754)
  • Cover trinity.protocol events in API docs (#766)
  • Cover TrinityConfig, Eth1AppConfig and BeaconAppConfig in API docs. (#775)
  • Improve layout of API docs by grouping classmethods, methods and attributes. (#778)
  • In the API docs display class methods, static methods and methods as one group “methods”. While we ideally wish to separate these, Sphinx keeps them all as one group which we’ll be following until we find a better option. (#794)

Deprecations and Removals

  • Plugin removals
    • Remove BaseAsyncStopPlugin which isn’t needed anymore now that there is no hardwired networking process anymore.
    • Remove plugin manager scopes which aren’t needed anymore now that there is only a single PluginManager. (#763)
  • The get_chain_config API was moved from the TrinityConfig to the Eth1AppConfig (#771)


Released 2019-06-05

  • Upgraded py-evm to deal with eth-keys v0.3.0 dependency issue – see commit


Released 2019-05-21

  • #637: EVM upgrade: py-evm upgraded to v0.2.0-alpha.43, changes copied here, from the py-evm changelog
    • #1778: Feature: Raise custom decorated exceptions when a trie node is missing from the database (plus some bonus logging and performance improvements)
    • #1732: Bugfix: squashed an occasional “mix hash mismatch” while syncing
    • #1716: Performance: only calculate & persist state root at end of block (post-Byzantium)
    • #1735:
      • Performance: only calculate & persist storage roots at end of block (post-Byzantium)
      • Performance: batch all account trie writes to the database once per block
    • #1747:
      • Maintenance: Lazily generate VM.block on first access. Enables loading the VM when you don’t have its block body.
      • Performance: Fewer DB reads when block is never accessed.
    • Performance: speedups on chain.import_block():
      • #1764: Speed up is_valid_opcode check, formerly 7% of total import time! (now less than 1%)
      • #1765: Reduce logging overhead, ~15% speedup
      • #1766: Cache transaction sender, ~3% speedup
      • #1770: Faster bytecode iteration, ~2.5% speedup
      • #1771: Faster opcode lookup in apply_computation, ~1.5% speedup
      • #1772: Faster Journal access of latest data, ~6% speedup
      • #1773: Faster stack operations, ~9% speedup
      • #1776: Faster Journal record & commit checkpoints, ~7% speedup
      • #1777: Faster bytecode navigation, ~7% speedup
    • #1751: Maintenance: Add placeholder for Istanbul fork
  • #629: Feature: Peers which disconnect from us too quickly are blacklisted for a short period of time.
  • #625: Feature: Peer backend system is now sent full list of connected remotes
  • #624: Feature: Better logging and tracking of the reason a peer disconnection occured.
  • #612: Feature: Make Python 3.7 the environment of the ethereum/trinity docker images
  • #596: Feature: p2p.PeerPool now sources peer candidates using an extendable backend system.
  • #519: Feature: Retain disconnect reason on BasePeer when we disconnect.
  • #555: Feature: Peers who timeout too often in the Request/Response API will be disconnected from and blacklisted for 5 minutes.
  • #558: Feature: Peers who are disconnected due to a bad_protocol are blacklisted for 10 minutes.
  • #559: Feature: Peers who send invalid responses are disconnected from using bad_protocol.
  • #569: Feature: Log messages with sequences of block numbers now use a concise representation to reduce message size.
  • #571: Feature: BaseService.uptime property now exposes integer number of seconds since service was started.
  • #441: Feature: Run with any custom network ID, as long as you specify a genesis file
  • #436: Feature: Connect to preferred nodes even when discovery is disabled
  • #518: Feature: Create log directory for you, if data dir is empty
  • #630: Bugfix: Proper shutdown of the whole trinity process if the network database is corrupt.
  • #618: Bugfix: Can actually connect to other trinity peers now (and syncing peers).
  • #595: Bugfix: Error handling for corrupt snappy data
  • #591: Bugfix: Catch RuntimeError in handshake to prevent crashing the entire node
  • #469: Bugfix: Fix deprecation warnings from p2p.ecies module.
  • #527: Bugfix: LESPeer class now raises proper exceptions for mismatched genesis hash or network id.
  • #531: Bugfix: p2p.kademlia.Node class is now pickleable.
  • #564: Bugfix: Sub-protocol compatibility matching extracted from p2p.BasePeer to make it easier to test.
  • #565: Bugfix: p2p.Protocol and p2p.Command classes no longer use mutable data structures for class-level properties.
  • #568: Bugfix: Revert to fixed timeout for Request/Response cycle with peer to mitigate incorrect timeouts when networking conditions change.
  • #570: Bugfix: Remove local implementations of humanize utils in favor of eth-utils library implementations.
  • #485: Bugfix: Ensure Trinity shuts down if Discovery crashes unexpectedly
  • #400: Bugfix: Respect configuration of individual logger (e.g -l p2p.discovery=ERROR)
  • #336: Bugfix: Ensure Trinity shuts down if the process pool dies (fatal error)
  • #347: Bugfix: Don’t crash during sync pruning when switching peers
  • #446: Bugfix(es): Several reliability improvements to regular sync
  • #389: Bugfix: Always return contiguous headers from header syncer
  • #493: Performance: Establish peer connections concurrently rather than sequentially.
  • #528: Performance: Limit number of concurrent attempts to establish new peer connections.
  • #536: Performance: Peer connection tracking is now a plugin in the trinity codebase.
  • #389: Performance: When switching sync to a new lead peer, don’t backtrack to importing old headers
  • #556: Performance: Upgrade to lahja 0.13.0 which performs less inter-process communication
  • #386: Performance: Slightly reduce eventbus traffic that the peer pool causes
  • #483: Performance: Speed up normalization of peer messages
  • #608: Maintenance: Enable tests for Constantinople and Petersburg
  • #623: Maintenance: Optimise for faster test runs


Released 2019-02-28

  • #337: Feature: Support for ConstantinopleV2 aka Petersburg aka ConstantinopleFix
  • #270: Performance: Persist information on peers between runs
  • #268: Maintenance: Add more bootnodes, use all the Geth and Parity bootnodes
  • #263: Performance: Upgrade to lahja 0.11.0 and get rid of EventBus coordinator process
  • #227: Bugfix: Do not accidentially create many processes that sit idle
  • #227: Tests: Cover APIs that also hit the database in trinity attach tests
  • #155: Feature: Disable syncing entirely with –sync-mode none
  • #155: Feature: Allow running –sync-mode full directly
  • #155: Feature: Allow plugins to extend –sync-mode with different strategies
  • #236: Performance: Quicker pruning of in-memory headers, was a leading asyncio bottleneck
  • #236: Bugfix: Several reliability improvements during sync


Released Jan 15, 2019

  • #176: Delay Constantinople upgrade


Released December 13, 2018

  • #1579: Feature: Full Constantinople support, with all* tests passing
  • #1590: Performance: CodeStream speedup
  • #1576: Bugfix: require recent enough py-ecc to avoid busted py-ecc release (see #1572)
  • #1577: Maintenance: Show state diffs on all state failures (see #1573)
  • #1570: Maintenance: Cleanup sporadic unclean shutdown of peer request
  • #1580: Maintenance: The logged delta in expected vs actual account balance was backwards
  • #1573: Maintenance: Display state diffs on failing tests, for much easier EVM debugging
  • #1567: Performance: Reduce event bus traffic by enabling point-to-point communication
  • #1569: Bugfix: Increase Kademlia timeouts to work on high-latency networks
  • #1530: Maintenance: Rename logging level from trace (reserved for EVM tracing) to debug2
  • #1553: Maintenance: Dynamically tune peer timeouts with historical latency (also #1583)
  • #1560: Bugfix: Constantinople CREATE2 gas usage
  • #1559: Feature: Mainnet configuration now defaults to Constantinople rules at 7080000
  • #1557: Docs: Clarify that local plugins must be installed with -e
  • #1538: Maintenance: Variety of dependency resolution warning cleanups
  • #1549: Maintenance: Separate Plugin space for trinity and trinity-beacon
  • #1554: Maintenance: Enable asynchronous iterators that can be cancelled by a service
  • #1523: Maintenance: Much faster testing of valid PoW chains
  • #1536: Maintenance: Add trinity-beacon command as a placeholder for future Beacon Chain
  • #1500: Performance: Be smarter about validating the bloom filter, to avoid duplicate hashing
  • #1537: Maintenance: Use new event bus feature to avoid the old hack for clean shutdown
  • #1544: Docs: Quickstart fix – use trinity attach instead of console
  • #1541: Docs: Simplify and de-duplicate readme
  • #1533: Bugfix: Light chain data lookups regressed during genesis file feature. Fixed
  • #1524: Bugfix: Validate header chain continuity during light sync
  • #1528: Maintenance: Computation code reorg and gas logging bugfix
  • #1522: Bugfix: Increase the system recursion limit for EVM requirements, but never decrease it
  • #1519: Docs: Document why we must spawn instead of fork on linux (spoiler: asyncio)
  • #1516: Maintenance: Add test for trinity attach
  • #1299: Feature: Launch via custom genesis file (See EIP proposal)
  • #1496: Bugfix: Regular chain sync crash
  • The research team has started adding Beacon Chain code to the underlying py-evm repo. It’s all a work in progress, but for those who like to follow along:
    • #1508: Rework Eth2.0 Types
    • #1543: Beacon Chain network commands and protocol scaffolding
    • #1521: Rework helper functions - part 1
    • #1552: Beacon Chain protocol class and handshake
    • #1555: Rename data structures and constants
    • #1563: Rework helper functions - part 2
    • #1574: Beacon block request handler


That sound you make when you burp in the middle of a hiccup. Hiccurp?


Released November 20, 2018

  • #1488: Bugfix: Bugfix for state sync to limit the number of open files.
  • #1478: Maintenance: Improve logging messages during fast sync to include performance metrics
  • #1476: Bugfix: Ensure that network connections are properly close when a peer doesn’t successfully complete the handshake.
  • #1474: Bugfix: EthStats fix for displaying correct uptime metrics
  • #1471: Maintenance: Upgrade mypy to 0.641
  • #1469: Maintenance: Add logging to show when fast sync has completed.
  • #1467: Bugfix: Don’t add peers which disconnect during the boot process to the peer pool.
  • #1465: Bugfix: Proper handling for when SIGTERM is sent to the main Trinity process.
  • #1463: Bugfix: Better handling for bad server responses by EthStats client.
  • #1443: Maintenance: Merge the --nodekey and --nodekey-path flags.
  • #1438: Bugfix: Remove warnings when printing the ASCII Trinity header
  • #1437: Maintenance: Update to use f-strings for string formatting
  • #1435: Maintenance: Enable Constantinople fork on Ropsten chain
  • #1434: Bugfix: Fix incorrect mainnet genesis parameters.
  • #1421: Maintenance: Implement eth_syncing JSON-RPC endpoint
  • #1410: Maintenance: Implement EIP1283 for updated logic for SSTORE opcode gas costs.
  • #1395: Bugfix: Fix gas cost calculations for CREATE2 opcode
  • #1386: Maintenance: Trinity now prints a message to make it more clear why Trinity was shutdown.
  • #1387: Maintenance: Use colorized output for WARNING and ERROR level logging messages.
  • #1378: Bugfix: Fix address generation for CREATE2 opcode.
  • #1374: Maintenance: New ChainTipMonitor service to keep track of the highest TD chain tip.
  • #1371: Maintenance: Upgrade mypy to 0.630
  • #1367: Maintenance: Improve logging output to include more contextual information
  • #1361: Maintenance: Remove HeaderRequestingPeer in favor of BaseChainPeer
  • #1353: Maintenance: Decouple peer message handling from syncing.
  • #1351: Bugfix: Unhandled DecryptionError
  • #1348: Maintenance: Add default server URIs for mainnet and ropsten.
  • #1347: Maintenance: Improve code organization within trinity module
  • #1343: Bugfix: Rename Chain.network_id to be Chain.chain_id
  • #1342: Maintenance: Internal rename of ChainConfig to TrinityConfig
  • #1336: Maintenance: Implement plugin for EthStats reporting.
  • #1335: Maintenance: Relax some constraints on the ordered task management constructs.
  • #1332: Maintenance: Upgrade pyrlp to 1.0.3
  • #1317: Maintenance: Extract peer selection from the header sync.
  • #1312: Maintenance: Turn on warnings by default if in a prerelease


Released September 27, 2018

  • #1332: Bugfix: Comparing rlp objects across processes used to fail sporadically, because of a changing object hash (fixed by upgrading pyrlp to 1.0.3)
  • #1326: Maintenance: Squash a stack trace in the logs when a peer sends us an invalid public key during handshake
  • #1325: Bugfix: When switching to a new peer to sync headers, it might have started from too far behind the tip, and get stuck
  • #1327: Maintenance: Squash some log warnings from trying to make a request to a peer (or receive a response) while it is shutting down
  • #1321: Bugfix: Address a couple race condition exceptions when syncing headers from a new peer, and other downstream processing is in progress
  • #1316: Maintenance: Reduce size of images in documentation
  • #1313: Maintenance: Remove miscellaneous things that are generating python warnings (eg~ using deprecated methods)
  • #1279: Reliability: Atomically persist when storing: a block, a chain of headers, or a cluster of trie nodes
  • #1304: Maintenance: Refactor AtomicDB to return an explict database instance to write into
  • #1296: Maintenance: Require new AtomicDB in chain and header DB layers
  • #1295: Maintenance: New AtomicDB interface to enable a batch of atomic writes (all succeed or all fail)
  • #1290: Bugfix: more graceful recovery when re-launching sync on a fork
  • #1277: Maintenance: add a cancellable call_later to all services
  • #1226: Performance: enable multiple peer requests to a single fast peer when other peers are slow
  • #1254: Bugfix: peer selection when two peers have exactly the same throughput
  • #1253: Maintenance: prefer f-string formatting in p2p, trinity code


  • #1249: Misc bugfixes for fast sync reliability.
  • #1245: Improved exception messaging for BaseService
  • #1244: Use time.perf_counter or time.monotonic over time.time
  • #1242: Bugfix: Unhandled MalformedMessage.
  • #1235: Typo cleanup.
  • #1236: Documentation cleanup
  • #1237: Code cleanup
  • #1232: Bugfix: Correctly enforce timeouts on peer requests and add lock mechanism to support concurrency.
  • #1229: CI cleanup
  • #1228: Merge KademliaProtocol and DiscoveryProtocol
  • #1225: Expand peer stats tracking
  • #1221: Implement Discovery V5 Protocol
  • #1219: Re-organize and document fixture filler tools
  • #1214: Implement BaseService.is_operational.
  • #1210: Convert sync to use streaming queue instead of batches.
  • #1209: Chain Builder tool
  • #1205: Bugfix: ExchangeHandler stats crash
  • #1204: Consensus bugfix for uncle validation
  • #1151: Change to import_block to return chain re-organization data.
  • #1197: Increase wait time for database IPC socket.
  • #1194: Unify ValidationError to use eth-utils exception class.
  • #1190: Improved testing for peer authentication
  • #1189: Detect crashed sub-services and exit
  • #1179: LightNode now uses Server for incoming peer connections.
  • #1182: Convert fix-unclean-shutdown CLI command to be a plugin


  • #1081 #1115 #1116: Reduce logging output during state sync.
  • #1063 #1035 #1089 #1131 #1132 #1138 #1149 #1159: Implement round trip request/response API.
  • #1094 #1124: Make the node processing during state sync more async friendly.
  • #1097: Keep track of which peers are missing trie nodes during state sync.
  • #1109 #1135: Python 3.7 testing and experimental support.
  • #1136 #1120: Module re-organization in preparation of extracting p2p and trinity modules.
  • #1137: Peer subscriber API now supports specifying specific msg types to reduce msg queue traffic.
  • #1142 #1165: Implement JSON-RPC endpoints for: eth_estimateGas, eth_accounts, eth_call
  • #1150 #1176: Better handling of malformed messages from peers.
  • #1157: Use shared pool of workers across all services.
  • #1158: Support specifying granular logging levels via CLI.
  • #1161: Use a tmpfile based LevelDB database for cache during state sync to reduce memory footprint.
  • #1166: Latency and performance tracking for peer requests.
  • #1173: Better APIs for background task running for Service classes.
  • #1182: Convert fix-unclean-shutdown command to be a plugin.


  • Remove specified eth-account dependency in favor of allowing specify the correct version.


  • #1058 #1044: Add fix-unclean-shutdown CLI command for cleaning up after a dirty shutdown of the trinity CLI process.
  • #1041: Bugfix for ensuring CPU count for process pool is always greater than 0
  • #1010: Performance tuning during fast sync. Only check POW on a subset of the received headers.
  • #996 Experimental new Plugin API: Both the transaction pool and the console and attach commands are now written as plugins.
  • #898: New experimental transaction pool. Disabled by default. Enable with --tx-pool. (warning: has known issues that effect sync performance)
  • #935: Protection against eclipse attacks.
  • #869: Ensure connected peers are on the same side of the DAO fork.

Minor Changes

  • #1081: Reduce DEBUG log output during state sync.
  • #1071: Minor fix for how version string is generated for trinity
  • #1070: Easier profiling of ChainSyncer
  • #1068: Optimize evm.db.chain.ChainDB.persist_block for common case.
  • #1057: Additional DEBUG logging of peer uptime and msg stats.
  • #1049: New integration test suite for trinity CLI
  • #1045 #1051: Bugfix for generation of block numbers for GetBlockHeaders requests.
  • #1011: Workaround for parity bug parity #8038
  • #987: Now serving requests from peers during fast sync.
  • #971 #909 #650: Benchmarking test suite.
  • #968: When launching console and attach commands, check for presence of IPC socket and log informative message if not found.
  • #934: Decouple the Discovery and PeerPool services.
  • #913: Add validation of retrieved contract code when operating in --light mode.
  • #908: Bugfix for transitioning from syncing chain data to state data during fast sync.
  • #905: Support for multiple UPNP devices.


  • Bugfix for PreferredNodePeerPool to respect max_peers


  • More bugfixes to enforce --max-peers in PeerPool._connect_to_nodes


  • Bugfix to enforce --max-peers for incoming connections.


  • Remove min_peers concept from PeerPool
  • Add --max-peers and enforcement of maximum peer connections maintained by the PeerPool.


  • Respond to GetBlockHeaders message during fast sync to prevent being disconnected as a useless peer.
  • Add --profile CLI flag to Trinity to enable profiling via cProfile
  • Better error messaging with Trinity cannot determine the appropriate location for the data directory.
  • Handle ListDeserializationError during handshake.
  • Add net_version JSON-RPC endpoint.
  • Add web3_clientVersion JSON-RPC endpoint.
  • Handle rlp.DecodingError during handshake.