Emerald Web3 Gateway 2.2.0

Supported versions

Name	Version
Oasis Core	22.x
Emerald Paratime	8.x

Notable changes

This release adds an in-memory cache for common queries and implements Prometheus monitoring.

Monitoring is disabled by default, see example config on how to enable the Prometheus endpoint: https://github.com/oasisprotocol/emerald-web3-gateway/blob/496b3f432f903e246fdb60362e6a5b16399454d3/conf/tests.yml#L31-L33

Changelog

New Features

• f7fc08e: feat(indexer): Add a log cache (@Yawning)
• 58be80a: feat(indexer): Add a tx and tx receipt cache (@Yawning)
• cabfa22: feat(indexer): Implement a response cache (@Yawning)
• 342ea05: feat(indexer): Improve cache memory efficiency (@Yawning)
• ac30933: feat: add prometheus metrics for caches (@ptrus)
• 02e0999: feat: adds metrics for psql queries (@ptrus)
• 23a49de: feat: implement a gas price oracle based on indexed blocks (@ptrus)
• 2242476: feat: implement monitoring for API endpoints (@ptrus)
• e079ecc: feat: implements metrics for indexer (@ptrus)

Bug fixes

• 65f52f8: fix(cache): use the cached backend from the service (@ptrus)

Dependencies updates

• c8b2af0: deps(ci): bump actions/upload-artifact from 2 to 3 (@dependabot[bot])
• 2b1a40c: deps(ci): bump codecov/codecov-action from 2.1.0 to 3.0.0 (@dependabot[bot])
• 31c0695: deps(go): bump github.com/knadh/koanf from 1.4.0 to 1.4.1 (@dependabot[bot])

Other changes

• 85978e2: other(ci): update setup-go action to v3 (@ptrus)
• e861d1c: other(metrics): add shorter buckets to API request duration histograms (@ptrus)
• 5343d1e: other(metrics): make cache hit ratio metric name consistent (@ptrus)

Full Changelog: v2.1.0...v2.2.0

Running the gateway

https://github.com/oasisprotocol/emerald-web3-gateway/blob/v2.2.0/README.md#running-the-gateway-on-testnetmainnet