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v1.6.0
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romac Romain Ruetschi
SSH Key Fingerprint: icVRLH4pmtysyDpxyzYqlvUUujQ1O5hfuRkYhXqIfP0 Learn about vigilant mode.
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Learn about vigilant mode.

July 19th, 2023

This release of Hermes notably features a new pull-based event source which fetches events from the chain periodically using
the /block_results RPC endpoint instead of getting them over WebSocket.

To use the new pull-based event source, set

event_source = { mode = 'pull', interval = '1s' }`

in the per-chain configuration.

Check the event_source setting in the example config.toml file in the Hermes repository for more details.

Additionally, it is now possible to skip the scanning phase during Hermes startup, by disabling clients, connections and channels workers, and setting clear_on_start to false. This significantly improve startup time when relaying on chains with hundreds or thousands of open channels, connections and clients.
See the Performance tuning page of the guide for more information.

Note for operators

⚠️ Be aware that this release contains breaking changes to the Hermes configuration.
⚠️ Please consult the UPGRADING.md document for more details.

BREAKING CHANGES

  • The websocket_addr configuration option has been removed in favour of the new event_source setting.
    Please consult the UPGRADING.md document for more details.
  • Bump MSRV to 1.71 (#3478)

BUG FIXES

  • Relayer CLI
    • Install CA certificates in Docker image for Hermes to be able to connect to TLS endpoints (#3423)
  • Relayer Library
    • Fix a bug where Hermes would discard the client updates corresponding to the supporting headers returned by the light client when assembling messages to relay from the operational data (#3465)

FEATURES

  • Relayer Library

    • Add a pull-based event source which fetches events from the chain periodically using the /block_results RPC endpoint instead of getting them over WebSocket.

      To use the pull-based event source, set event_source = { mode = 'pull', interval = '1s' } in the per-chain configuration.

      Warning
      Only use this if you think Hermes is not getting all the events it should, eg. when relaying for a CosmWasm-enabled blockchain which emits IBC events in a smart contract where the events lack the message attribute key.
      See #3190 and #2809 for more background information.
      (#2850)

  • Integration Test Framework
    • Add integration tests for the Fee Grant module. (#3416)
    • Add a new trait InterchainSecurityChainTest and two functions run_binary_interchain_security_node_test and run_binary_interchain_security_channel_test which can be used to bootstrap a Provider and Consumer chain for integration tests. Add a CI job to run tests with Gaia as a provider chain and Neutron as a Consumer chain.
      (#3450) (#3387)

IMPROVEMENTS

  • Relayer CLI
    • By disabling clients, connections and channels workers, and setting clear_on_start to false, Hermes will now skip the scanning phase during startup, significantly improve startup time when relaying on chains with hundreds or thousands of open channels, connections and/or clients. See the Performance tuning page of the guide for more information. (#3403)
  • Relayer Library
    • Hermes will now automatically shutdown inactive workers to reduce the consumption of host system resources (#3385)
    • Query the /genesis RPC endpoint to retrieve the value of max_expected_time_per_block and use it for max_block_time. (#3211)
  • Telemetry & Metrics
    • Add two new configurations for the telemetry buckets:
    • latency_submitted used to specify the range and number of buckets for the tx_latency_submitted metric.
    • latency_confirmed used to specify the range and number of buckets for the tx_latency_confirmed metric.
      (#3366)
  • Integration Test Framework
    • Update ICA tests to use ibc-go's simd instead of interchain-accounts-demo. (#3353)
    • Update simd version used in integration tests from v7.0.0 to v7.1.0 (#3434)

What's Changed

New Contributors

Full changes: v1.5.1...v1.6.0

Contributors

romac, seanchen1991, and 4 other contributors
Assets 10
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