CM-1099 LiveArt External Adapter

[markhoangcll]

Closes OPDATA-4029 / CM-1099

Description

LiveArt External Adapter (EA) to fetch art nav_per_share numerical data.
......

Changes

• Created EA
• Wrote integration and unit tests
• Generated a changeset

Steps to Test

From root directory

1. yarn setup
2. export adapter=liveart
3. yarn test $adapter/test

Quality Assurance

• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant infra-k8s configuration file.
• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant adapter-secrets configuration file or update the soak testing blacklist.
• If a new adapter was made, or a new endpoint was added, update the test-payload.json file with relevant requests.
• The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Jira.
• This is related to a maximum of one Jira story or GitHub issue.
• Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types).
• All code changes have 100% unit and integration test coverage. If testing is not applicable or too difficult to justify doing, the reasoning should be documented explicitly in the PR.

[changeset-bot]

🦋 Changeset detected

Latest commit: ba0ef5c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@chainlink/liveart-external-adapter	Major

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