OPDATA-6575: proof-of-reserves-2 rewrite (#4835)

* Generated with yarn new

* KRWQ working

* Working with 2 components of Solv, before converting everything to fixed point

* Working with components in response

* More output

* Merge 'reduce' into 'balances' param. And forward provide error message.

* Separate addressLists and balanceSources sections

* Make conversions explicit

* Remove overrides

* Delete test-payload.json

* request validation and fixed point arithmetic with tests

* Refactor fetch rate

* All tests passing

* Code cleanup

* Order functions

* Validate duplicate and unused items

* changeset

* Add example params

* address comments

* Rename to proof-of-reserves-v2

* Refactor address, balance, conversion

* More files

Author: dskloetc

.changeset/brave-foxes-reply.md

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+---
+'@chainlink/proof-of-reserves-v2-adapter': major
+---
+
+Initial version to support first use case

.pnp.cjs

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+# Chainlink External Adapter for proof-of-reserves-v2
+
+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 proof-of-reserves-v2`.

packages/composites/proof-of-reserves-v2/CHANGELOG.md

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+## Variable env vars
+
+Several parameters in the request refer to a `provider`. This is a string that
+identifies the data provider to use for that parameter. To support a
+specific value for the `provider` parameter, the environment variable
+`<PROVIDER>_URL` must be set, where `<PROVIDER>` is the
+upper-snake-case version of the value provided for the `provider` parameter.
+
+For example, if there is an address list with `"provider": "por-address-list"`,
+then `POR_ADDRESS_LIST_URL` must be set to the URL of the `por-address-list`
+adapter.

packages/composites/proof-of-reserves-v2/README.md

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+{
+  "name": "@chainlink/proof-of-reserves-v2-adapter",
+  "version": "0.0.0",
+  "description": "Chainlink proof-of-reserves-v2 adapter.",
+  "keywords": [
+    "Chainlink",
+    "LINK",
+    "blockchain",
+    "oracle",
+    "proof-of-reserves-v2"
+  ],
+  "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": "^29.5.14",
+    "@types/node": "22.14.1",
+    "@types/object-path": "^0",
+    "nock": "13.5.6",
+    "typescript": "5.8.3"
+  },
+  "dependencies": {
+    "@chainlink/external-adapter-framework": "2.13.1",
+    "decimal.js": "^10.6.0",
+    "object-path": "^0.11.8",
+    "tslib": "2.4.1"
+  }
+}

packages/composites/proof-of-reserves-v2/docs/custom.md

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+import { AdapterConfig } from '@chainlink/external-adapter-framework/config'
+
+export const config = new AdapterConfig({
+  MAX_RESPONSE_TEXT_IN_ERROR_MESSAGE: {
+    description:
+      'How many characters of a response may be included in an error message before trunctating it',
+    type: 'number',
+    default: 200,
+    sensitive: false,
+  },
+  BACKGROUND_EXECUTE_MS: {
+    description:
+      'The amount of time the background execute should sleep before performing the next request',
+    type: 'number',
+    default: 10_000,
+    sensitive: false,
+  },
+})

packages/composites/proof-of-reserves-v2/package.json

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