Feat/DF-20625 apex (#3672)

* DF-20625 apex EA initial commit

* add changeset

* review fixes

.changeset/chilled-shrimps-happen.md

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+---
+'@chainlink/apex-adapter': major
+---
+
+Apex EA Initial Commit

packages/sources/apex/README.md

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+# Chainlink External Adapter for apex
+
+This README will be generated automatically when code is merged to `main`. If you would like to generate a preview of the README, please run `yarn generate:readme apex`.

packages/sources/apex/package.json

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+{
+  "name": "@chainlink/apex-adapter",
+  "version": "0.0.0",
+  "description": "Chainlink apex adapter.",
+  "keywords": [
+    "Chainlink",
+    "LINK",
+    "blockchain",
+    "oracle",
+    "apex"
+  ],
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "repository": {
+    "url": "https://github.com/smartcontractkit/external-adapters-js",
+    "type": "git"
+  },
+  "license": "MIT",
+  "scripts": {
+    "clean": "rm -rf dist && rm -f tsconfig.tsbuildinfo",
+    "prepack": "yarn build",
+    "build": "tsc -b",
+    "server": "node -e 'require(\"./index.js\").server()'",
+    "server:dist": "node -e 'require(\"./dist/index.js\").server()'",
+    "start": "yarn server:dist"
+  },
+  "devDependencies": {
+    "@types/jest": "27.5.2",
+    "@types/node": "22.12.0",
+    "nock": "13.5.6",
+    "typescript": "5.6.3"
+  },
+  "dependencies": {
+    "@chainlink/external-adapter-framework": "2.0.0",
+    "axios": "1.7.9",
+    "tslib": "2.4.1"
+  }
+}

packages/sources/apex/src/config/index.ts

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+import { AdapterConfig } from '@chainlink/external-adapter-framework/config'
+
+export const config = new AdapterConfig({
+  CLIENT_ID: {
+    description: 'Data Provider client ID',
+    type: 'string',
+    required: true,
+    sensitive: true,
+  },
+  CLIENT_SECRET: {
+    description: 'Data Provider client secret',
+    type: 'string',
+    required: true,
+    sensitive: true,
+  },
+  SCOPE: {
+    description: 'Scope of credentials',
+    type: 'string',
+    required: true,
+    sensitive: true,
+  },
+  GRANT_TYPE: {
+    description: 'Grant type for credentials',
+    type: 'string',
+    required: true,
+    sensitive: true,
+  },
+  NAV_API_ENDPOINT: {
+    description: 'An API endpoint for Data Provider',
+    type: 'string',
+    default: 'https://api.apexgroup.com/v1/reports/NAV',
+  },
+  AUTH_API_ENDPOINT: {
+    description: 'An auth API endpoint for Data Provider',
+    type: 'string',
+    required: true,
+    sensitive: true,
+  },
+  BACKGROUND_EXECUTE_MS: {
+    description:
+      'The amount of time the background execute should sleep before performing the next request',
+    type: 'number',
+    default: 10_000,
+  },
+})

packages/sources/apex/src/endpoint/index.ts

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+export { endpoint as nav } from './nav'

packages/sources/apex/src/endpoint/nav.ts

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+import { AdapterEndpoint } from '@chainlink/external-adapter-framework/adapter'
+import { InputParameters } from '@chainlink/external-adapter-framework/validation'
+import { SingleNumberResultResponse } from '@chainlink/external-adapter-framework/util'
+import { config } from '../config'
+import { navTransport } from '../transport/nav'
+
+export const inputParameters = new InputParameters(
+  {
+    accountName: {
+      required: true,
+      type: 'string',
+      description: 'The account name to query',
+    },
+  },
+  [
+    {
+      accountName: 'EXAMPLE',
+    },
+  ],
+)
+
+export type BaseEndpointTypes = {
+  Parameters: typeof inputParameters.definition
+  Response: SingleNumberResultResponse
+  Settings: typeof config.settings
+}
+
+export const endpoint = new AdapterEndpoint({
+  name: 'nav',
+  transport: navTransport,
+  inputParameters,
+})

packages/sources/apex/src/index.ts

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+import { expose, ServerInstance } from '@chainlink/external-adapter-framework'
+import { Adapter } from '@chainlink/external-adapter-framework/adapter'
+import { config } from './config'
+import { nav } from './endpoint'
+
+export const adapter = new Adapter({
+  defaultEndpoint: nav.name,
+  name: 'APEX',
+  config,
+  endpoints: [nav],
+  rateLimiting: {
+    tiers: {
+      default: {
+        rateLimit1m: 6,
+        note: 'Setting reasonable default limits',
+      },
+    },
+  },
+})
+
+export const server = (): Promise<ServerInstance | undefined> => expose(adapter)