Add Tenbin EA

[dskloetc]

https://smartcontract-it.atlassian.net/browse/OPDATA-8022?actionerId=712020%3A321ba373-a1ab-4dc7-83d7-3dbb7f331368&sourceType=assign

Description

Add Tenbin EA which returns the aggregated balance after verifying its authenticity.

Changes

1. yarn new in a separate commit.
2. Implement verification instructions from the ticket.
3. Download test fixtures:

   curl -sSLf https://github.com/tenbinlabs/verification-service-releases/releases/latest/download/build.json > packages/sources/tenbin/test/unit/github-build-2026-09-03.json
   curl -sSfL -X GET 'https://public-api.tenbin.xyz/v1/verifier/attest' -H "Authorization: Bearer $API_KEY" > packages/sources/tenbin/test/unit/attest-response-2026-09-01.json
   

Steps to Test

curl --silent -S -X POST http://localhost:8080 -H 'Content-Type: application/json' -d '{
  "data": {
    "endpoint": "verified-balance"
  }
}'

{
  "data": {
    "result": "398016.04503100860192553965510"
  },
  "statusCode": 200,
  "result": "398016.04503100860192553965510",
  "timestamps": {
    "providerDataRequestedUnixMs": 1788510033149,
    "providerDataReceivedUnixMs": 1788510034595
  },
  "meta": {
    "adapterName": "TENBIN",
    "transportName": "default_single_transport",
    "metrics": {
      "feedId": "N/A"
    }
  }
}

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.
• 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: 7787f54

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

This PR includes changesets to release 1 package

Name	Type
@chainlink/tenbin-adapter	Major

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR